2. Pertussis is an infectious
disease caused by a
bacterium called Bordetella
Pertussis
The bacterium was first
isolated in 1906
Small aerobic, gram-
negative bacteria Bordetella Pertussis
gram stain
Bordetella Pertussis under
microscope

3. The bacteria attaches to cilia of the hosts
respiratory cells and produces toxins which
paralyze the cilia.
This causes the respiratory tract to inflame
which causes the excretion of pulmonary
secretions difficult.

4. Very Contagious disease which is only
found in humans.
Usually caused by people with Pertussis
coughing or sneezing within close
contact of other who then breathe in the
bacteria.

5. 7-10 day incubation period
Rarely may be 42 days
Illness is divided into 3 stages
•Catarrhal Stage
•Paroxysmal Cough Stage
•Convalescence