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POLIOMYELITIS
          and
ACUTE FLACCID PARALYSIS
Topics
Introduction
History
Epidemiology
Pathogenesis
Clinical features
Diagnosis
Treatment
Prognosis
Prevention
Programmes
Introduction
Synonyms
  Infantile paralysis

Definition
   Acute viral infectious disease
   Caused by enterovirus
   Route – feco – oral

Greek
   poliós - "grey"
   myelós - "spinal cord"
History
   Timeline             Events

   ANCIENT EGYPT        An egyptian mummy
   3.,700 B.C           with probable polio
                        found.
   1,209 B.C            Mummy Giptah with
                        an equinus foot

   Eighteenth century   First known
   1789                 description by
                        underwood
   Ninteenth century    First epidemic of
   1834                 polio in island of St.
                        Helena
History
  Timeline            Events

  1855                First description by
                      Duchenne of the
                      pathalogical process
  Twentieth century   Transmission of polio to
  1908                a monkey by
                      Landsteiner
  1949                Growth of virus on
                      tissue culture
  1951                Three types of polio
                      virus isolated and
                      identified
  1954                First large scale trial of
                      Salk
  1958                First general use of
                      Sabin
Epidemiology
Incidence
(2011)
India: 5 cases- 1 Wild polio, 4 VAPP

(2010)
Global: 332 confirmed cases

India: 42 confirmed cases

Last case detected in Goa in 1997
Agent
                          Poliovirus
Structure:
 Group- group IV ((+)ssRNA)
   Genus- Enterovirus
 Family- Picornaviridae
 3 serotypes- type 1, type2, type 3
 Composed of an RNA genome and a protein capsid.

Resistance:
 In feces – for months at 40 C & years at -200 C
 Inactivated by heat and chlorination
Agent
Host range
 Natural infection occurs only in humans

Mode of transmission
 Feco-oral route
 In early stage of disease- through inhalation or entry
  through conjunctiva of droplets of respiratory
  secretion of patient.

Period of communicability
 7 to 10 days before and after the onset of symptoms
Host
Age
 Most vulnerable- 6 months to three years

Sex
 M: F ratio 3:1

Immunity
 First 6 months maternal antibody
 Acquired through infection with the wild virus
 Immunization
Environment

Seasonal
 More during rainy season

Environmental sources of infection
 Contaminated water and food
 Flies
 Overcrowding and poor sanitation
Pathogenesis
                 Incubation period: 7-10 days (4- 35 days)
Feco-oral
Inhalational             Portal of entry-           Local        Minor/Primary
                              mouth              multiplication      Viremia
infects the pharynx
and intestinal mucosa.

Gains entry by            Multiplies in         To spinal cord   Major/Secondary
                            neurons                and brain          Viremia
binding to an
immunoglobulin-like
receptor, known as the
poliovirus receptor or     Lesions are mostly
                          in anterior horns of   DESTROYS
CD155, on the cell        spinal cord causing
                                                  THEM!
membrane                    flaccid paralysis
Pathogenesis

                  Portal of entry-           Local        Minor/Primary
                      mouth              multiplication      Viremia
 Epithelial
  cells of GIT

                   Multiplies in         To spinal cord   Major/Secondary
                    neurons                and brain          Viremia

 Lymphatic
  tissue- from
  tonsils to       Lesions are mostly
                                         DESTROYS
                  in anterior horns of
  Peyer’s         spinal cord causing
                    flaccid paralysis
                                          THEM!
  patches
Pathogenesis

 Spreads to        Portal of entry-           Local        Minor/Primary
                        mouth              multiplication      Viremia
  regional lymph
  nodes
                     Multiplies in         To spinal cord   Major/Secondary
 Enters blood        neurons                and brain          Viremia


  stream -
  primary viremia    Lesions are mostly
                    in anterior horns of   DESTROYS
                    spinal cord causing
                      flaccid paralysis
                                            THEM!
Pathogenesis

 Multiplies in
                    Portal of entry-           Local        Minor/Primary
  reticulo-             mouth              multiplication      Viremia
  endothelial
  systems
                     Multiplies in         To spinal cord   Major/Secondary
 Enters blood        neurons                and brain          Viremia

  stream again -
  secondary
                     Lesions are mostly
  viremia           in anterior horns of   DESTROYS
                    spinal cord causing
                      flaccid paralysis
                                            THEM!
Pathogenesis
Carried to spinal cord & brain

                                 Portal of entry-           Local        Minor/Primary
                                     mouth              multiplication      Viremia




                                  Multiplies in         To spinal cord   Major/Secondary
Bloodstream        Direct          neurons                and brain          Viremia
              (Tonsillectomy
                 trauma
                 IM injections
                 fatigue )        Lesions are mostly
                                 in anterior horns of   DESTROYS
                                 spinal cord causing
                                   flaccid paralysis
                                                         THEM!
Pathogenesis
 Multiplies in neurons

 Degeneration of          Portal of entry-           Local        Minor/Primary
                               mouth              multiplication      Viremia
  Nissl’s body
  (chromatolysis)

 Nuclear changes           Multiplies in         To spinal cord   Major/Secondary
  follows                    neurons                and brain          Viremia



 When degeneration
  irreversible             Lesions are mostly
                           in anterior horns of   DESTROYS
  phagocytosed by          spinal cord causing
                             flaccid paralysis
                                                   THEM!
  leucocytes or
  macrophages
Pathogenesis
   Lesions are in anterior
    horn of spinal cord
    Flaccid paralysis         Portal of entry-           Local        Minor/Primary
                                  mouth              multiplication      Viremia

    Can cause
     encephalitis involving
    •    Brainstem             Multiplies in         To spinal cord   Major/Secondary
    •    Motor &                neurons                and brain          Viremia
         Premotor areas of
         cerebral cortex
                               Lesions are mostly
                              in anterior horns of   DESTROYS
                              spinal cord causing
                                flaccid paralysis
                                                      THEM!
Pathogenesis

Portal of entry-           Local            Minor/Primary
    mouth              multiplication          Viremia




 Multiplies in         To spinal cord      Major/Secondary
  neurons                and brain             Viremia




 Lesions are mostly
in anterior horns of                    DESTROYS
spinal cord causing
  flaccid paralysis                      THEM!
Clinical Features

                                   Abortive polio
                 Inapparent (90-
                      95%)         Non- paralytic
Infection                            aseptic
                  Apparent (5-      meningitis
                     10%)
                                     Paralytic
                                   poliomyelitis


                                       Polio
                                    encephalitis
Abortive polio
 4 – 8% of infections
 Minor illness
 Symptoms
   low grade fever
   sore throat
   vomiting
   abdominal pain
   Loss of appetite
   malaise
 Recovery – complete, no paralysis
Non paralytic aseptic meningitis

 1- 2 % of infections

 Symptoms
   headache
   nausea
   vomiting
   pain and stiffness of back and legs
Non paralytic aseptic meningitis

     Signs
   Tripod sign
   Kiss the knee test
   Head drop sign
   Neck rigidity

    Recovery within 2 – 10 days
Tripod sign
Head drop sign

 Method
   Hand placed under patient’s shoulder and
  trunk is raised

 Observation
  Head lags behind limply
Kiss the knee test

 Method
  knees kept down
  child asked to kiss his knees



 Observation
  Cannot do the maneuver due to stiffness spine
  May draw up the knees sharply
Neck rigidity

 Method
  In uncooperative child-place childs head beyond the
  edge of table



 Observation
  True involuntary neck rigidity persists
  Voluntary stiffening of muscles disappears
Paralytic poliomyelitis
 0.5 – 1% of infections



 2 PHASES        - Minor
                    Major

    Minor- same as abortive polio

    Major- muscle pain ,spasm and return of fever

     Followed by rapid onset flaccid paralysis
     complete within 72hrs
Paralytic poliomyelitis

                Spinal paralytic
                 poliomyelitis

  Paralytic
                 Bulbar polio
Poliomyelitis

                 Bulbo-spinal
                    polio
Spinal paralytic poliomyelitis
 Most common

 80% of cases

 Results from lower motor neuron lesion of anterior
  horn cells of spinal cord

 Affects muscles of legs, arms and/or trunk

 Severe cases – quadriplegia , paralysis of trunk
  abdominal and thoracic muscles
Spinal paralytic poliomyelitis

 Paralysis – asymmetrical ( legs > arms), descending
  paralysis

 Muscles – floppy

 Reflexes diminished

 Sensation normal

 Residual paralysis after 60 days
Bulbar polio
 2% of cases
 Life threatening
 Cranial nerve lesion - vagus

    Symptoms
o   Nasal twang and hoarseness of voice
o   Nasal regurgitation
o   Dyspnea
o   Dysphagia
o   Child refuses to feed
o   Secretions accumulate in pharynx - aspiration
Bulbar polio

• Involvement of
       respiratory centre - Shallow , irregular respiration
       Vasomotor centre - BP rises then falls
• pulse – rapid weak thready
• Skin – dusky red mottled
• Restless , confused and comatose
Bulbo-spinal poliomyelitis


 20% cases

 Combination of spinal paralytic and bulbar polio
Polio Encephalitis
   Occurs in rare cases
   Symptoms
 Irritability

 Delirium

 Disorientation

 Tremors

 Convulsions

 Paralysis is of upper motor neuron type
Residual paralysis
   Acute phase of illness lasts for 0-4weeks
   Recovery –variable
   At 60 days mild to severe residual paresis
   Maximum recovery – first 6 months
   Slow recovery upto 2 yrs
   After 2 yrs post polio residual paralysis persists
    throughout life
Diagnosis
History
Clinical examination
Stool examination
CSF examination
Serological tests
Stool examination
     Collection of sample
   Two samples 24 hr apart
   Within 14 days of onset of paralysis
   8-10 grams or thumb size
   Collected in a clean wide mouth bottle – plastic or glass
    with screw cap
   Sample stored below 8°C
   No dessication or leakage till received at WHO
    Accredited Lab
   If paralysis detected after 2 wks sample taken upto 60
    days from onset
Stool examination
   Contact sampling

 Done when child has died without adequate stool
  sampling

 5 children in close contact with the child are taken

 Single stool sample collected
CSF examination

Characteristics            Observations


 Appearance       Clear / slightly turbid

     Cells        Leucocytosis (mainly
                  lymphocytes)

   Proteins       Normal / slightly raised

   glucose        Normal
Serological tests
 3 types of antibodies
  Neutralizing antibodies (IgG)
  Antibodies to C antigen (IgM)
  Anti-D antibodies

 Complement fixation test – detects IgM and Anti-D
  antibodies
 Identifies exposure to poliovirus not for type- specific
  diagnosis
 Less often employed
Differential diagnosis
          •   Most common
              GB syndrome
             Transverse myelitis
          •   Others
             Traumatic neuritis
             Meningitis
             Encephalitis
             Toxin – diphtheria and
              botulism
TREATMENT
Treatment

   Symptomatic and supportive

 Rest in bed

 Relief of pain and spasm of muscles

 Neutral positioning of the limbs

 Physiotherapy

 Good nursing
Bed Rest
 Essential during acute phase
  Physical activity & trauma increases risk of paralytic polio

 Posture to be changed every 2-3 hrs.

 Child to be placed on stomach for short periods each day, to
  prevent pneumonia
 Optimum position for limbs
   Hip – slight flexion
   Knee – 5 degree flexion
   Foot – 90 degree support against the sole


                         Pain Relief
 Sister Kenny’s treatment
   Hot moist packs applied to the muscles to relieve pain and
  spasm

 analgesics
Physiotherapy
 Method

• Joints & paralysed muscles – moved passively through full
  range
• For 10 min , 2-3 times/day

 Benefits

• Prevents deformities and contracture
• Promote development of muscle power in non-paralysed
  muscles
Physiotherapy
Good nursing
 Team approach is essential
 Nursing staff is an imp part

 Diet
 Nutritious , balanced & wholesome

   In non paralytic polio- normal diet

   In paralytic
    Fed by Ryles tube
    Calories/kg body wt.
Good Nursing
 In dysphagia pt. nursed in prone position with foot end raised – gravity
  drainage of pooled secretions in pharynx

 Or intermittent suction

 Tracheostomy

 Respiratory failure – assisted respiration with mechanical ventilator
Treatment
Indications for hospitalization
 Paralysis of upper limbs <3 days duration

 Progression of paralysis

 Bulbar involvement

 Respiratory distress

 Marked drowsiness

 Complications
Rehabilitation
Rehabilitation


 Physical

 Emotional and Psychological

 Social
Rehabilitation



Emotional support to the
child helps prepare himself
for better adjustment in
life despite the handicap
Complications
   Myocarditis
   Hypertension
   Pulmonary edema
   Pneumonia
   Urinary tract infections

 Skeletal deformities -
                       equinus foot
                       scoliosis
                       osteoporosis
                       bone fractures
 Compression neuropathy
Prognosis
 Non paralytic cases – complete recovery

 Paralytic polio – permanent weakness in 2/3rd cases

 Worse – older children
          sudden onset of illness with high fever
Post – polio syndrome
 Observed in people who had polio during their childhood.

 Affects about 25-50 % of the polio survivors.

 More common in females

   General fatigue
   muscular weakness
   joint pains
   & breathing problems are seen in affected
PREVENTION
Immunisation
• History
• Sabin’s Live Polio Vaccine
  I.    Preparation
  II. Storage and transport
  III. Administration
  IV. Dosage
  V. Development of Immunity
  VI. Advantages and Disadvantages
  VII. Complications and Contraindications
• Salk’s Killed Polio Vaccine
  I.    Preparation
  II. Dosage
• Sabin Vs Salk
• Pulse Polio Immunization
History
• Earliest vaccines-
a. Crude suspensions of spinal cord from infected monkeys    -Ineffective
b. Inactivated with     Formalin (Brodie and Park)           -Often dangerous
                        Ricinoleate (Kolmer)                  causing vaccination
                                                              poliomyelitis




•    By 1953
a.   Salk had developed a killed vaccine
b.   Almost simultaneously, Koprowsky, Cox and Sabin independently developed live
     attenuated vaccines
Sabin’s Live Polio Vaccine
• Sabin’s attenuated strains are employed
• Developed by plaque selection in MKTC



• Preparation
a. Attenuated strains grown in MKTC
b. Stringent precautions to ensure freedom from SV40 and B virus.
c. Use of molar MgCl2 or sucrose stabilises the vaccine against heat
   inactivation
Sabin’s Live Polio Vaccine
• Criteria for selection
a. Should not be neurovirulent     as tested by intraspinal inoculation in
                                    monkeys
b.   Should be able to set up
     intestinal infection          following feeding & induce immune
                                    response
c.   Should be stable &
     not acquire neurovirulence    after serial enteric passage
d.   Should posses stable
     genetic markers               enabling differentiation from wild
     virulent strians.
Sabin’s Live Polio Vaccine
Genetic Markers:
• D Marker
• Rct 40
•   MS
• Mcbride’s intratypic antigenic marker

Molecular Epidemiological Methods:
• Monoclonal antibodies specific to vaccine strains
• Oligonucleotide finger printing
• Nucleic acid sequencing
Sabin’s Live Polio Vaccine
•     Storage
i.    Stabilised vaccine:      1 year at 4 °C
                               1 month at room temperature
ii.   Non-stabilised vaccine: -20 °C in deep freeze (In the freezer
                               compartment of refrigerator)

•     During transport, keep the vaccine under
i.    Dry ice (solid carbon dioxide)
ii.   Freezing mixture (equal quantities of wet ice and ammonium chloride)

•     At vaccination clinic
i.    Shouldn’t be frozen and thawed repeatedly deleterious effect on
      potency
ii.   Keep vaccine in ice during administration
Sabin’s Live Polio Vaccine
• OPV in India, trivalent, contains
a. Type 1- 1 lakh TC ID 50
b. Type 2- 2 lakh TC ID 50          per 0.5 ml
c. Type 3- 3 lakh TC ID 50          (2 drops in India)



• Administration- 2 drops
• Use the dropper supplied
  a. Tilt the child’s back
  b. Gently squeeze the cheeks/
       pinch the nose  make the mouth open
  c. Let the drops fall from the dropper onto the tongue.
Sabin’s Live Polio Vaccine
• National Immunization Schedule
Age                                Dose


At birth                           OPV-0


At 6 weeks                         OPV-1


At 10 weeks                        OPV-2


At 14 weeks                        OPV-3


16-24 months                       OPV
Sabin’s Live Polio Vaccine
• Indian Academy of Paediatrics recommendation
Age                                    Dose


At birth                               OPV-0


At 6 weeks                             OPV-1+IPV


At 10 weeks                            OPV-2+IPV


At 14 weeks                            OPV-3+IPV


16-24 MONTHS                           OPV+IPV


5 years                                OPV
Development of Immunity
Infects intestinal epithelial cells

Replicates  transported to Peyer’s patches                   Stimulates
                                                    production of IgA antibodies
Secondary multiplication d subsequent viremia              (LOCAL IMMUNITY)


Spreads to other parts of body                             Prevents infection of
                                                           GIT with wild strains

Production of circulating antibodies                       Vaccine progeny
                                                           excreted in feces
Prevents dissemination of virus to nervous system
                                                           Non-immunized
                                                           persons immunized
Prevents paralytic polio

(SYSTEMIC IMMUNITY)                   HERD IMMUNITY
Sabin’s Live Polio Vaccine
• Advantages
i.   Oral easily admin no need of highly trained personnel
ii. Induces both humoral and systemic immunity
iii. Antibodies quickly produced*
iv. Vaccinees excrete virus herd immunity
v. Useful in epidemics
vi. Relatively inexpensive

• Disadvantages
i.   Instability at high temperatures
ii. Frequent vaccine failures even with fully potent vaccines
iii. Very small residual neurovirulence in OPV
Sabin’s Live Polio Vaccine
• Complications
a. Mutation (esp. type 3[1] /2[2])
b. WHO estimated the risk of
   i.  vaccine-associated paralysis :                1 case/million vaccinees
   ii. Risk of close contact of vaccinee :   1 case/5 million doses of vaccine
       developing paralytic polio

Contraindications
a. Immunocompromised individuals leukemics, malignacy, those
    receiving corticosteroids.
b. Pregnant mothers OPV should be delayed until after pregnancy unless
    immediate protection is required, when IPV is indicated.
c. Premature Babies
ALERT!
           DIARRHOEA NOT A CONTRAINDICATION

But a dose of OPV given at that time shouldn't be considered as part of the
   series and should receive another at earliest opportunity.
Salk’s Killed Polio Vaccine
Formalin inactivated preparation

Three types of polio virus grown in monkey kidney tissue culture(MKTC)


•Procedure for Preparation

                       3 types of PVs       Adequate titre    Inactivated with
Standard virulent
                     grown separately    filtered to remove   formalin at 37°C
   strains used
                          in MKTC        debris and clumps    FOR 12-15 DAYS



Stringent tests to                        Further tests for
                      Three types are
ensure complete                              safety and        Issued for use
                      further pooled
   inactivation                               potency
Salk’s Killed Polio Vaccine
• 1954 nationwide field trial (USA)- 80 -90% protection




• 1955 – ‘Cutter incident’; over 100 cases of paralytic poliomyelitis occurred
  in vaccines and their contacts following insufficiently inactivated vaccine.
Salk’s Killed Polio Vaccine
• Injectable Polio Vaccine (IPV)
a. 1st dose given at 6 weeks.
b. Immunity sustained by booster doses every 3-5 years thereafter
c. Vaccination of choice among HIV, other immunocompromised states,
    pregnant mothers.


                                    •    Enhanced potency IPV
                                    a.   Produced in human diploid cells
                                    b.   Two s.c. Does, 4-8 weeks apart, third
                                         may be 6-12 months later.
                                    c.   Better seroconversion
Sabin Vs Salk
Feature             Sabin’s Vaccine (live)          Salk’s Vaccine (killed)

Strain              Live attenuated virus           Killed formalised vaccine



Administration      Oral (preferred in mass         Injectable (adv. can be
                    campaigns)                      given with DPT)



Factors affecting   Diarrhoeal disease preventing   Not affected by these
efficacy            colonisation by vaccine virus   factors


Safety              Safe                            Safe
                    But, cases of vaccine induced
                    paralysis reported
Sabin Vs Salk
Feature           Sabin’s Vaccine (live)   Salk’s Vaccine (killed)

Economical        More                     Less (because, virus
                                           content is 10,000 times
                                           more, hence costlier)

Nature of         Local and systemic       Only systemic, no
immunity                                   intestinal immunity  No
                                           herd immunity

Duration          Life long                Periodic booster doses
                                           required

Use in epidemic   Ideal                    Not very ideal- May
                                           promote multiplication
                                           on 7 dissemination of
                                           wild virus.
Pulse Polio Immunization
     Largest public health campaign ever conducted in a single country
• Occurs as two rounds 4-6 wks apart during low transmission season of
  polio- Nov to Feb
• First round- 9th Dec ‘95 and 20th Jan ‘96

• Sudden, simultaneous, mass administration of OPV on a single day
• To all children 0-5 years
• Regardless of previous immunization

• Extra doses which supplement
• Do not replace the doses during routine immunization
• Children/infants should receive all their schedules OPV doses.
WE NEED JUST ONE
MORE THING TO END
 POLIO FOREVER




     “YOU”
Acute Flaccid
  Paralysis
Introduction
    Case definition
•   Child less than 15 yrs with acute onset flaccid paralysis for which
    no obvious cause is found
•   Acute - onset paralysis < 4 wks
•   Flaccid - floppy or limp paralysis
•   Background rate of AFP
•   One case of AFP per year for every one lakh population of children
    less than 15 years
Conditions causing AFP
                      Site                     Conditions
Muscle                        Myoglobinuric myopathy
                              Hypokalemic paralysis
                              Toxic paralysis
                              Myopathy of intensive care
Neuromuscular junction        Myasthenia gravis
                              Botulism
                              Hypermagnesemia
Peripheral nerve              Guillian barre syndrome
                              Diphtheric neuropathy
                              Porphyria
                              Lead neuropathy
                              Hypophosphatemia
                              Cobalamin deficiency
Anterior horn cells           Poliomyelitis
                              Other enteroviruses
Differential Diagnosis of AFP
Feature          Poliomyelitis      G.B. Syndrome   Transverse        Traumatic
                                                    myelitis          neuritis
History
Progression to   24-48 hrs          Hours to days   Hours to 4 days   Hours to 4 days
full paralysis


Fever onset      High always        No              Present before    No
                 present at onset                   paralysis
                 of paralysis


Bladder          Absent             Transient       Present           Never
dysfunction
Feature          Poliomyelitis      G.B. Syndrome       Transverse        Traumatic
                                                        myelitis          neuritis

             Differential Diagnosis of AFP
                                      Examination
Flaccidity       Acute,             Acute,              Acute,            Acute, assymetric
                 assymetrical,      symmetrical,        symmetrical,
                 proximal           distal, ascending   lower limb
Muscle tone      Diminished         Diminished          Diminished in     Diminished
                                                        lower limbs
Deep tendon      Decrease or        Absent              Absent early,      Decreased or
reflexes         absent                                 hyperreflexia late absent
Sensation        Severe myalgia   Cramps, tingling,     Anesthesia of     Pain in gluteal
                 and backache, no hypo anesthesia       lower limb with   region
                 sensory changes of palms and           sensory level
                                  soles
Cranial nerves   Only when          Often present       Absent            Absent
                 bulbar and         affecting nerves
                 bulbo-spinal       VII,IX,X,XI,XII
Respiratory      Only when bulbo    In severe cases     Sometimes         Absent
insufficiency    and bulbo-spinal
Feature           Poliomyelitis        G.B. Syndrome        Transverse          Traumatic
                                                            myelitis            neuritis

           Differential Diagnosis of AFP
                                        Investigations
CSF examination   High               Less than 10           Cellular or       Normal
                  leucocytosis;      leucocytes: high       acellular; normal
                  normal or slightly protein                or slighly
                  increased protein                         increased protein
EMG at three      Abnormal             Normal               Normal              May show
weeks                                                                           abnormality
Nerve             Normal               Abnormal,            Normal              Abnormal
conduction                             demylination or
velocity at 3                          axonal damage
weeks
                                      Sequlae at 3 months
                  Severe,              Symmetrical          Diplegia, atrophy   Moderate
                  assymetrical         atrophy of distal    after years,        atrophy in the
                  atrophy; skeletal    muscles recovery     recovery in         affected limb
                  deformity appear     in milder cases      milder cases
                  late
AFP Surveillance
• All cases to be reported
• All reported cases classified as polio non polio
• High sensitivity of reporting will ensure detection of all cases
   resulting in control measures to interrupt transmission
• Two critical indicators of quality of surveillance are -
a.    rate of non polio AFP
b.    proportion of AFP cases with two adequate stools collected
        within 14 days of onset of paralysis
Case investigation
•   Stool sample collection
•   Stool sample result
•   60 days follow up
•   Special investigations if indicated
•   Final classification
Stool examination
    Collection of sample
   Two samples 24 hr apart
   Within 14 days of onset of paralysis
   8-10 grams or thumb size
   Collected in a clean wide mouth bottle – plastic or glass with screw
    cap
   Sample stored below 8 C
   No dessication or leakage till received at WHO Accredited Lab
   If paralysis detected after 2 wks sample taken upto 60 days from
    onset
Stool examination
   Contact sampling

 Done when child has died without adequate stool sampling

 5 children in close contact with the child are taken

 Single stool sample collected
Virological AFP
                                                            Compatible
      Wild polio                            Confirm
        virus                                expert
                         Residual
                                             review
                      weakness, died
                     lost to follow up                       discard

AFP


                     Inadequate or                 No
                      no specimen                residual        discard
       No wild
        virus                                   weakness



                    2 adequate stool specimen                    discard
Clinical AFP

      Lost follow                   confirm
          up

                     Residual
                     paralysis      confirm

AFP   Follow-up at
        60 days
                     Positive for
                                    confirm
                      wild polio
                        virus

      No residual
       paralysis                    discard
Sequence of action to be taken after
     detecting a case of AFP
    Acute onset of paralysis

                       Within 48 hrs


 Investigate the suspected case                        Discard the case of traumatic /
                                                       electrolyte imbalance

                                       Within 3 days
  2 adequate stool specimen                               National lab to
          collected                                    report within 28 days


Outbreak response immunization
    and active surveillance
                                                            Intratyping



  60 days follow up (before 70                         Final classification of
              days)                                     case within 90 days
Bibliography
Textbooks
1. M.D RMK, Stanton BF, Geme JS, Schor N, Behrman RE. Nelson Textbook
    of Pediatrics: Expert Consult Premium Edition - Enhanced Online
    Features and Print. Elsevier - Health Sciences Division; 2011.

2. Parthasarathy et al. Textbook of Pediatrics IAP. Jaypee Brothers
   Publishers; 2005.

3. O.P. Ghai et al. Essential Pediatrics. CBS Publishers & Distributors; 2009.

4. Park JE. Textbook of preventive and social medicine: a treatise on
   community health. Banarsidas Bhanot; 1972.

5. Fauci AS, Eugene B, M.D SLH, M.D DLL, J J, Joseph L. Harrison’s principles
   of internal medicine. McGraw-Hill; 2008.
Bibliography
• Online Resources
• AFP Statistics:
  i.   National Polio Surveillance Project
       http://www.npspindia.org/

• Image Courtesy:
   i.  Rotary International Foundation
       http://www.rotary.org

   ii.    Bill and Melinda Gates foundation
          http://www.gatesfoundation.org/

   iii.   Global Polio Eradication Initiative
          http://www.polioeradication.org/
Contact
• For distribution and discussion:


                                Dr. Ankush
                         Goa Medical College, Goa
                         drankush1989@gmail.com

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Polio Final Presentation

  • 1. POLIOMYELITIS and ACUTE FLACCID PARALYSIS
  • 3. Introduction Synonyms Infantile paralysis Definition Acute viral infectious disease Caused by enterovirus Route – feco – oral Greek poliós - "grey" myelós - "spinal cord"
  • 4. History Timeline Events ANCIENT EGYPT An egyptian mummy 3.,700 B.C with probable polio found. 1,209 B.C Mummy Giptah with an equinus foot Eighteenth century First known 1789 description by underwood Ninteenth century First epidemic of 1834 polio in island of St. Helena
  • 5. History Timeline Events 1855 First description by Duchenne of the pathalogical process Twentieth century Transmission of polio to 1908 a monkey by Landsteiner 1949 Growth of virus on tissue culture 1951 Three types of polio virus isolated and identified 1954 First large scale trial of Salk 1958 First general use of Sabin
  • 6. Epidemiology Incidence (2011) India: 5 cases- 1 Wild polio, 4 VAPP (2010) Global: 332 confirmed cases India: 42 confirmed cases Last case detected in Goa in 1997
  • 7.
  • 8.
  • 9. Agent Poliovirus Structure:  Group- group IV ((+)ssRNA)  Genus- Enterovirus  Family- Picornaviridae  3 serotypes- type 1, type2, type 3  Composed of an RNA genome and a protein capsid. Resistance:  In feces – for months at 40 C & years at -200 C  Inactivated by heat and chlorination
  • 10. Agent Host range  Natural infection occurs only in humans Mode of transmission  Feco-oral route  In early stage of disease- through inhalation or entry through conjunctiva of droplets of respiratory secretion of patient. Period of communicability  7 to 10 days before and after the onset of symptoms
  • 11. Host Age  Most vulnerable- 6 months to three years Sex  M: F ratio 3:1 Immunity  First 6 months maternal antibody  Acquired through infection with the wild virus  Immunization
  • 12. Environment Seasonal  More during rainy season Environmental sources of infection  Contaminated water and food  Flies  Overcrowding and poor sanitation
  • 13. Pathogenesis Incubation period: 7-10 days (4- 35 days) Feco-oral Inhalational Portal of entry- Local Minor/Primary mouth multiplication Viremia infects the pharynx and intestinal mucosa. Gains entry by Multiplies in To spinal cord Major/Secondary neurons and brain Viremia binding to an immunoglobulin-like receptor, known as the poliovirus receptor or Lesions are mostly in anterior horns of DESTROYS CD155, on the cell spinal cord causing THEM! membrane flaccid paralysis
  • 14. Pathogenesis Portal of entry- Local Minor/Primary mouth multiplication Viremia  Epithelial cells of GIT Multiplies in To spinal cord Major/Secondary neurons and brain Viremia  Lymphatic tissue- from tonsils to Lesions are mostly DESTROYS in anterior horns of Peyer’s spinal cord causing flaccid paralysis THEM! patches
  • 15. Pathogenesis  Spreads to Portal of entry- Local Minor/Primary mouth multiplication Viremia regional lymph nodes Multiplies in To spinal cord Major/Secondary  Enters blood neurons and brain Viremia stream - primary viremia Lesions are mostly in anterior horns of DESTROYS spinal cord causing flaccid paralysis THEM!
  • 16. Pathogenesis  Multiplies in Portal of entry- Local Minor/Primary reticulo- mouth multiplication Viremia endothelial systems Multiplies in To spinal cord Major/Secondary  Enters blood neurons and brain Viremia stream again - secondary Lesions are mostly viremia in anterior horns of DESTROYS spinal cord causing flaccid paralysis THEM!
  • 17. Pathogenesis Carried to spinal cord & brain Portal of entry- Local Minor/Primary mouth multiplication Viremia Multiplies in To spinal cord Major/Secondary Bloodstream Direct neurons and brain Viremia (Tonsillectomy trauma IM injections fatigue ) Lesions are mostly in anterior horns of DESTROYS spinal cord causing flaccid paralysis THEM!
  • 18. Pathogenesis  Multiplies in neurons  Degeneration of Portal of entry- Local Minor/Primary mouth multiplication Viremia Nissl’s body (chromatolysis)  Nuclear changes Multiplies in To spinal cord Major/Secondary follows neurons and brain Viremia  When degeneration irreversible  Lesions are mostly in anterior horns of DESTROYS phagocytosed by spinal cord causing flaccid paralysis THEM! leucocytes or macrophages
  • 19. Pathogenesis  Lesions are in anterior horn of spinal cord Flaccid paralysis Portal of entry- Local Minor/Primary mouth multiplication Viremia  Can cause encephalitis involving • Brainstem Multiplies in To spinal cord Major/Secondary • Motor & neurons and brain Viremia Premotor areas of cerebral cortex Lesions are mostly in anterior horns of DESTROYS spinal cord causing flaccid paralysis THEM!
  • 20. Pathogenesis Portal of entry- Local Minor/Primary mouth multiplication Viremia Multiplies in To spinal cord Major/Secondary neurons and brain Viremia Lesions are mostly in anterior horns of DESTROYS spinal cord causing flaccid paralysis THEM!
  • 21. Clinical Features Abortive polio Inapparent (90- 95%) Non- paralytic Infection aseptic Apparent (5- meningitis 10%) Paralytic poliomyelitis Polio encephalitis
  • 22. Abortive polio  4 – 8% of infections  Minor illness  Symptoms low grade fever sore throat vomiting abdominal pain Loss of appetite malaise  Recovery – complete, no paralysis
  • 23. Non paralytic aseptic meningitis  1- 2 % of infections  Symptoms headache nausea vomiting pain and stiffness of back and legs
  • 24. Non paralytic aseptic meningitis Signs  Tripod sign  Kiss the knee test  Head drop sign  Neck rigidity Recovery within 2 – 10 days
  • 26. Head drop sign  Method Hand placed under patient’s shoulder and trunk is raised  Observation Head lags behind limply
  • 27. Kiss the knee test  Method knees kept down child asked to kiss his knees  Observation Cannot do the maneuver due to stiffness spine May draw up the knees sharply
  • 28. Neck rigidity  Method In uncooperative child-place childs head beyond the edge of table  Observation True involuntary neck rigidity persists Voluntary stiffening of muscles disappears
  • 29. Paralytic poliomyelitis  0.5 – 1% of infections  2 PHASES - Minor Major Minor- same as abortive polio Major- muscle pain ,spasm and return of fever Followed by rapid onset flaccid paralysis complete within 72hrs
  • 30.
  • 31. Paralytic poliomyelitis Spinal paralytic poliomyelitis Paralytic Bulbar polio Poliomyelitis Bulbo-spinal polio
  • 32. Spinal paralytic poliomyelitis  Most common  80% of cases  Results from lower motor neuron lesion of anterior horn cells of spinal cord  Affects muscles of legs, arms and/or trunk  Severe cases – quadriplegia , paralysis of trunk abdominal and thoracic muscles
  • 33. Spinal paralytic poliomyelitis  Paralysis – asymmetrical ( legs > arms), descending paralysis  Muscles – floppy  Reflexes diminished  Sensation normal  Residual paralysis after 60 days
  • 34.
  • 35. Bulbar polio  2% of cases  Life threatening  Cranial nerve lesion - vagus Symptoms o Nasal twang and hoarseness of voice o Nasal regurgitation o Dyspnea o Dysphagia o Child refuses to feed o Secretions accumulate in pharynx - aspiration
  • 36. Bulbar polio • Involvement of respiratory centre - Shallow , irregular respiration Vasomotor centre - BP rises then falls • pulse – rapid weak thready • Skin – dusky red mottled • Restless , confused and comatose
  • 37. Bulbo-spinal poliomyelitis  20% cases  Combination of spinal paralytic and bulbar polio
  • 38. Polio Encephalitis Occurs in rare cases Symptoms  Irritability  Delirium  Disorientation  Tremors  Convulsions  Paralysis is of upper motor neuron type
  • 39. Residual paralysis  Acute phase of illness lasts for 0-4weeks  Recovery –variable  At 60 days mild to severe residual paresis  Maximum recovery – first 6 months  Slow recovery upto 2 yrs  After 2 yrs post polio residual paralysis persists throughout life
  • 41. Stool examination Collection of sample  Two samples 24 hr apart  Within 14 days of onset of paralysis  8-10 grams or thumb size  Collected in a clean wide mouth bottle – plastic or glass with screw cap  Sample stored below 8°C  No dessication or leakage till received at WHO Accredited Lab  If paralysis detected after 2 wks sample taken upto 60 days from onset
  • 42. Stool examination Contact sampling  Done when child has died without adequate stool sampling  5 children in close contact with the child are taken  Single stool sample collected
  • 43. CSF examination Characteristics Observations Appearance Clear / slightly turbid Cells Leucocytosis (mainly lymphocytes) Proteins Normal / slightly raised glucose Normal
  • 44. Serological tests  3 types of antibodies Neutralizing antibodies (IgG) Antibodies to C antigen (IgM) Anti-D antibodies  Complement fixation test – detects IgM and Anti-D antibodies  Identifies exposure to poliovirus not for type- specific diagnosis  Less often employed
  • 45. Differential diagnosis • Most common  GB syndrome  Transverse myelitis • Others  Traumatic neuritis  Meningitis  Encephalitis  Toxin – diphtheria and botulism
  • 47. Treatment Symptomatic and supportive  Rest in bed  Relief of pain and spasm of muscles  Neutral positioning of the limbs  Physiotherapy  Good nursing
  • 48. Bed Rest  Essential during acute phase Physical activity & trauma increases risk of paralytic polio  Posture to be changed every 2-3 hrs.  Child to be placed on stomach for short periods each day, to prevent pneumonia
  • 49.  Optimum position for limbs Hip – slight flexion Knee – 5 degree flexion Foot – 90 degree support against the sole Pain Relief  Sister Kenny’s treatment Hot moist packs applied to the muscles to relieve pain and spasm  analgesics
  • 50. Physiotherapy  Method • Joints & paralysed muscles – moved passively through full range • For 10 min , 2-3 times/day  Benefits • Prevents deformities and contracture • Promote development of muscle power in non-paralysed muscles
  • 52. Good nursing  Team approach is essential  Nursing staff is an imp part  Diet  Nutritious , balanced & wholesome In non paralytic polio- normal diet In paralytic Fed by Ryles tube Calories/kg body wt.
  • 53. Good Nursing  In dysphagia pt. nursed in prone position with foot end raised – gravity drainage of pooled secretions in pharynx  Or intermittent suction  Tracheostomy  Respiratory failure – assisted respiration with mechanical ventilator
  • 54. Treatment Indications for hospitalization  Paralysis of upper limbs <3 days duration  Progression of paralysis  Bulbar involvement  Respiratory distress  Marked drowsiness  Complications
  • 56. Rehabilitation  Physical  Emotional and Psychological  Social
  • 57. Rehabilitation Emotional support to the child helps prepare himself for better adjustment in life despite the handicap
  • 58.
  • 59. Complications  Myocarditis  Hypertension  Pulmonary edema  Pneumonia  Urinary tract infections  Skeletal deformities - equinus foot scoliosis osteoporosis bone fractures  Compression neuropathy
  • 60. Prognosis  Non paralytic cases – complete recovery  Paralytic polio – permanent weakness in 2/3rd cases  Worse – older children sudden onset of illness with high fever
  • 61. Post – polio syndrome  Observed in people who had polio during their childhood.  Affects about 25-50 % of the polio survivors.  More common in females  General fatigue  muscular weakness  joint pains  & breathing problems are seen in affected
  • 63. Immunisation • History • Sabin’s Live Polio Vaccine I. Preparation II. Storage and transport III. Administration IV. Dosage V. Development of Immunity VI. Advantages and Disadvantages VII. Complications and Contraindications • Salk’s Killed Polio Vaccine I. Preparation II. Dosage • Sabin Vs Salk • Pulse Polio Immunization
  • 64. History • Earliest vaccines- a. Crude suspensions of spinal cord from infected monkeys -Ineffective b. Inactivated with Formalin (Brodie and Park) -Often dangerous Ricinoleate (Kolmer) causing vaccination poliomyelitis • By 1953 a. Salk had developed a killed vaccine b. Almost simultaneously, Koprowsky, Cox and Sabin independently developed live attenuated vaccines
  • 65. Sabin’s Live Polio Vaccine • Sabin’s attenuated strains are employed • Developed by plaque selection in MKTC • Preparation a. Attenuated strains grown in MKTC b. Stringent precautions to ensure freedom from SV40 and B virus. c. Use of molar MgCl2 or sucrose stabilises the vaccine against heat inactivation
  • 66. Sabin’s Live Polio Vaccine • Criteria for selection a. Should not be neurovirulent  as tested by intraspinal inoculation in monkeys b. Should be able to set up intestinal infection  following feeding & induce immune response c. Should be stable & not acquire neurovirulence  after serial enteric passage d. Should posses stable genetic markers  enabling differentiation from wild virulent strians.
  • 67. Sabin’s Live Polio Vaccine Genetic Markers: • D Marker • Rct 40 • MS • Mcbride’s intratypic antigenic marker Molecular Epidemiological Methods: • Monoclonal antibodies specific to vaccine strains • Oligonucleotide finger printing • Nucleic acid sequencing
  • 68. Sabin’s Live Polio Vaccine • Storage i. Stabilised vaccine: 1 year at 4 °C 1 month at room temperature ii. Non-stabilised vaccine: -20 °C in deep freeze (In the freezer compartment of refrigerator) • During transport, keep the vaccine under i. Dry ice (solid carbon dioxide) ii. Freezing mixture (equal quantities of wet ice and ammonium chloride) • At vaccination clinic i. Shouldn’t be frozen and thawed repeatedly deleterious effect on potency ii. Keep vaccine in ice during administration
  • 69. Sabin’s Live Polio Vaccine • OPV in India, trivalent, contains a. Type 1- 1 lakh TC ID 50 b. Type 2- 2 lakh TC ID 50 per 0.5 ml c. Type 3- 3 lakh TC ID 50 (2 drops in India) • Administration- 2 drops • Use the dropper supplied a. Tilt the child’s back b. Gently squeeze the cheeks/ pinch the nose  make the mouth open c. Let the drops fall from the dropper onto the tongue.
  • 70. Sabin’s Live Polio Vaccine • National Immunization Schedule Age Dose At birth OPV-0 At 6 weeks OPV-1 At 10 weeks OPV-2 At 14 weeks OPV-3 16-24 months OPV
  • 71. Sabin’s Live Polio Vaccine • Indian Academy of Paediatrics recommendation Age Dose At birth OPV-0 At 6 weeks OPV-1+IPV At 10 weeks OPV-2+IPV At 14 weeks OPV-3+IPV 16-24 MONTHS OPV+IPV 5 years OPV
  • 72. Development of Immunity Infects intestinal epithelial cells Replicates  transported to Peyer’s patches Stimulates production of IgA antibodies Secondary multiplication d subsequent viremia (LOCAL IMMUNITY) Spreads to other parts of body Prevents infection of GIT with wild strains Production of circulating antibodies Vaccine progeny excreted in feces Prevents dissemination of virus to nervous system Non-immunized persons immunized Prevents paralytic polio (SYSTEMIC IMMUNITY) HERD IMMUNITY
  • 73. Sabin’s Live Polio Vaccine • Advantages i. Oral easily admin no need of highly trained personnel ii. Induces both humoral and systemic immunity iii. Antibodies quickly produced* iv. Vaccinees excrete virus herd immunity v. Useful in epidemics vi. Relatively inexpensive • Disadvantages i. Instability at high temperatures ii. Frequent vaccine failures even with fully potent vaccines iii. Very small residual neurovirulence in OPV
  • 74. Sabin’s Live Polio Vaccine • Complications a. Mutation (esp. type 3[1] /2[2]) b. WHO estimated the risk of i. vaccine-associated paralysis : 1 case/million vaccinees ii. Risk of close contact of vaccinee : 1 case/5 million doses of vaccine developing paralytic polio Contraindications a. Immunocompromised individuals leukemics, malignacy, those receiving corticosteroids. b. Pregnant mothers OPV should be delayed until after pregnancy unless immediate protection is required, when IPV is indicated. c. Premature Babies
  • 75. ALERT! DIARRHOEA NOT A CONTRAINDICATION But a dose of OPV given at that time shouldn't be considered as part of the series and should receive another at earliest opportunity.
  • 76. Salk’s Killed Polio Vaccine Formalin inactivated preparation Three types of polio virus grown in monkey kidney tissue culture(MKTC) •Procedure for Preparation 3 types of PVs Adequate titre Inactivated with Standard virulent grown separately filtered to remove formalin at 37°C strains used in MKTC debris and clumps FOR 12-15 DAYS Stringent tests to Further tests for Three types are ensure complete safety and Issued for use further pooled inactivation potency
  • 77. Salk’s Killed Polio Vaccine • 1954 nationwide field trial (USA)- 80 -90% protection • 1955 – ‘Cutter incident’; over 100 cases of paralytic poliomyelitis occurred in vaccines and their contacts following insufficiently inactivated vaccine.
  • 78. Salk’s Killed Polio Vaccine • Injectable Polio Vaccine (IPV) a. 1st dose given at 6 weeks. b. Immunity sustained by booster doses every 3-5 years thereafter c. Vaccination of choice among HIV, other immunocompromised states, pregnant mothers. • Enhanced potency IPV a. Produced in human diploid cells b. Two s.c. Does, 4-8 weeks apart, third may be 6-12 months later. c. Better seroconversion
  • 79. Sabin Vs Salk Feature Sabin’s Vaccine (live) Salk’s Vaccine (killed) Strain Live attenuated virus Killed formalised vaccine Administration Oral (preferred in mass Injectable (adv. can be campaigns) given with DPT) Factors affecting Diarrhoeal disease preventing Not affected by these efficacy colonisation by vaccine virus factors Safety Safe Safe But, cases of vaccine induced paralysis reported
  • 80. Sabin Vs Salk Feature Sabin’s Vaccine (live) Salk’s Vaccine (killed) Economical More Less (because, virus content is 10,000 times more, hence costlier) Nature of Local and systemic Only systemic, no immunity intestinal immunity  No herd immunity Duration Life long Periodic booster doses required Use in epidemic Ideal Not very ideal- May promote multiplication on 7 dissemination of wild virus.
  • 81. Pulse Polio Immunization Largest public health campaign ever conducted in a single country • Occurs as two rounds 4-6 wks apart during low transmission season of polio- Nov to Feb • First round- 9th Dec ‘95 and 20th Jan ‘96 • Sudden, simultaneous, mass administration of OPV on a single day • To all children 0-5 years • Regardless of previous immunization • Extra doses which supplement • Do not replace the doses during routine immunization • Children/infants should receive all their schedules OPV doses.
  • 82. WE NEED JUST ONE MORE THING TO END POLIO FOREVER “YOU”
  • 83. Acute Flaccid Paralysis
  • 84. Introduction Case definition • Child less than 15 yrs with acute onset flaccid paralysis for which no obvious cause is found • Acute - onset paralysis < 4 wks • Flaccid - floppy or limp paralysis • Background rate of AFP • One case of AFP per year for every one lakh population of children less than 15 years
  • 85. Conditions causing AFP Site Conditions Muscle Myoglobinuric myopathy Hypokalemic paralysis Toxic paralysis Myopathy of intensive care Neuromuscular junction Myasthenia gravis Botulism Hypermagnesemia Peripheral nerve Guillian barre syndrome Diphtheric neuropathy Porphyria Lead neuropathy Hypophosphatemia Cobalamin deficiency Anterior horn cells Poliomyelitis Other enteroviruses
  • 86. Differential Diagnosis of AFP Feature Poliomyelitis G.B. Syndrome Transverse Traumatic myelitis neuritis History Progression to 24-48 hrs Hours to days Hours to 4 days Hours to 4 days full paralysis Fever onset High always No Present before No present at onset paralysis of paralysis Bladder Absent Transient Present Never dysfunction
  • 87. Feature Poliomyelitis G.B. Syndrome Transverse Traumatic myelitis neuritis Differential Diagnosis of AFP Examination Flaccidity Acute, Acute, Acute, Acute, assymetric assymetrical, symmetrical, symmetrical, proximal distal, ascending lower limb Muscle tone Diminished Diminished Diminished in Diminished lower limbs Deep tendon Decrease or Absent Absent early, Decreased or reflexes absent hyperreflexia late absent Sensation Severe myalgia Cramps, tingling, Anesthesia of Pain in gluteal and backache, no hypo anesthesia lower limb with region sensory changes of palms and sensory level soles Cranial nerves Only when Often present Absent Absent bulbar and affecting nerves bulbo-spinal VII,IX,X,XI,XII Respiratory Only when bulbo In severe cases Sometimes Absent insufficiency and bulbo-spinal
  • 88. Feature Poliomyelitis G.B. Syndrome Transverse Traumatic myelitis neuritis Differential Diagnosis of AFP Investigations CSF examination High Less than 10 Cellular or Normal leucocytosis; leucocytes: high acellular; normal normal or slightly protein or slighly increased protein increased protein EMG at three Abnormal Normal Normal May show weeks abnormality Nerve Normal Abnormal, Normal Abnormal conduction demylination or velocity at 3 axonal damage weeks Sequlae at 3 months Severe, Symmetrical Diplegia, atrophy Moderate assymetrical atrophy of distal after years, atrophy in the atrophy; skeletal muscles recovery recovery in affected limb deformity appear in milder cases milder cases late
  • 89. AFP Surveillance • All cases to be reported • All reported cases classified as polio non polio • High sensitivity of reporting will ensure detection of all cases resulting in control measures to interrupt transmission • Two critical indicators of quality of surveillance are - a. rate of non polio AFP b. proportion of AFP cases with two adequate stools collected within 14 days of onset of paralysis
  • 90. Case investigation • Stool sample collection • Stool sample result • 60 days follow up • Special investigations if indicated • Final classification
  • 91. Stool examination Collection of sample  Two samples 24 hr apart  Within 14 days of onset of paralysis  8-10 grams or thumb size  Collected in a clean wide mouth bottle – plastic or glass with screw cap  Sample stored below 8 C  No dessication or leakage till received at WHO Accredited Lab  If paralysis detected after 2 wks sample taken upto 60 days from onset
  • 92. Stool examination Contact sampling  Done when child has died without adequate stool sampling  5 children in close contact with the child are taken  Single stool sample collected
  • 93. Virological AFP Compatible Wild polio Confirm virus expert Residual review weakness, died lost to follow up discard AFP Inadequate or No no specimen residual discard No wild virus weakness 2 adequate stool specimen discard
  • 94. Clinical AFP Lost follow confirm up Residual paralysis confirm AFP Follow-up at 60 days Positive for confirm wild polio virus No residual paralysis discard
  • 95. Sequence of action to be taken after detecting a case of AFP Acute onset of paralysis Within 48 hrs Investigate the suspected case Discard the case of traumatic / electrolyte imbalance Within 3 days 2 adequate stool specimen National lab to collected report within 28 days Outbreak response immunization and active surveillance Intratyping 60 days follow up (before 70 Final classification of days) case within 90 days
  • 96. Bibliography Textbooks 1. M.D RMK, Stanton BF, Geme JS, Schor N, Behrman RE. Nelson Textbook of Pediatrics: Expert Consult Premium Edition - Enhanced Online Features and Print. Elsevier - Health Sciences Division; 2011. 2. Parthasarathy et al. Textbook of Pediatrics IAP. Jaypee Brothers Publishers; 2005. 3. O.P. Ghai et al. Essential Pediatrics. CBS Publishers & Distributors; 2009. 4. Park JE. Textbook of preventive and social medicine: a treatise on community health. Banarsidas Bhanot; 1972. 5. Fauci AS, Eugene B, M.D SLH, M.D DLL, J J, Joseph L. Harrison’s principles of internal medicine. McGraw-Hill; 2008.
  • 97. Bibliography • Online Resources • AFP Statistics: i. National Polio Surveillance Project http://www.npspindia.org/ • Image Courtesy: i. Rotary International Foundation http://www.rotary.org ii. Bill and Melinda Gates foundation http://www.gatesfoundation.org/ iii. Global Polio Eradication Initiative http://www.polioeradication.org/
  • 98. Contact • For distribution and discussion: Dr. Ankush Goa Medical College, Goa drankush1989@gmail.com

Editor's Notes

  1. JI C, Cohen JI. Harrison’s Principles of Internal Medicine Chapter 175: Enteroviruses and Reoviruses. McGraw-Hill Professional; 2004. p. pp.&amp;nbsp;1144.Chamberlin SL NB (eds ), Chamberlin SL, Narins B (eds.). The Gale Encyclopedia of Neurological Disorders. Detroit: Thomson Gale; 2005.
  2. Rationale Risk of VAPP is extremely low as child receives OPV at a time when he is protected by VAPP by maternal antibodies.Subsequently he is protected from VAPP by IPV
  3. Ghai’s Essential Paediatrics, Pradeep Seth, Surjit Singh, AditiSinhaImmunity and ImmunizationPg 167Park’s Textbook of Preventive and Social Medicine, K. Park, Epidemiology of Communicable diseases-Poliomyelitis Pg 181
  4. Salk D. Eradication of Poliomyelitis in the United States. II. Experience with Killed Poliovirus Vaccine. Review of Infectious Diseases. 1980 Mar 1;2(2):243 -257. Lapinleimu K, Stenvik M. Experiences with polio vaccination and herd immunity in Finland. Dev. Biol. Stand. 1981;47:241-246.