Micro ,L2, Upper respiratory tract infections 2, (Bordetella pertussis, H.influenza)

 L2, Upper respiratory tract infections 2, (Bordetella pertussis, H.influenza), micro

Lecture video 


1-Causitive organism of W cough is

a) B pertussis

b) B.parapertussis

c) B.bronchoseptica

d) none of the above

2- Vaccines against W cough include all the following except:


b) killed whole cell vaccine

c) acellular Vaccine

d) DPT

3- B.pertessis is isolated on

a) Agar

b) blood agar

c) Bordet gangue medium

d) MacConkey

 4- The drug of choice for treatment of whooping cough is



c) sulfa drugs

d) gentamycin

5- B pertussis is characterized by

a) produce erythrogenic toxin

b) Produce exotoxin (A & B subunits) that inhibit protein synthesis

c)Produce exotoxin (A & B subunits) that causes spoamodic cough in children

d) Produces verotoxin

6- A hyperemic edema of the larynx and epiglottis that rapidly leads to respiratory obstruction in young children is most likely to be caused by

 a. Klebsiella pneumonia

 .b. Mycoplasma pneumonia

c. Neisseria meningitides

d. Hemophilus influenza

e. Hemophilus hemolyticus

7- What is factor V that is required by haemophilius influenzae for growth



c. NAD or NADP coenzyme


 8- What disease is caused by Haemophilus influenzae ?

a. Acute bacterial meningitis

b. Flu

c. Shipping fever


e. Conjunctivitis

9- The major virulence factor of Haemophilus influenza type b is

a. pilli

b. Surface polysaccharide capsule.

c. Cell wall

d. Cell membrane

e. Exotoxin

 10- Which of the following is true of Haemophilus influenzae

a Invasive infections are most commonly associated with encapsulated strains

b. Most invasive infections occur in infants during the neonatal period

c. Most human infections are acquired from domestic pets

d. The organism can be readily cultured on sheep blood agar in an environment of

elevated CO2

e. Older adults are rarely at risk for infection with this organism because they

typically have a high level of immunity