Micro 15 1. As a group, gram negatives are more pathogenic than gram positives b

Question

Micro 15

1. As a group, gram negatives are more pathogenic than gram positives because of the presence of
         A. The endotoxin lipid A in the cell membrane
         B. The endotoxin lipid A in the cell wall
         C. The endotoxin lipid A in the cell membrane
         D. The exotoxin lipid A in the cell wall

2. Which is true of N. meningitidis?
   A. it can be normal flora of the respiratory tract
         B. transmitted via direct contact
         C. humans are the only reservoirs
         D. A and B
       E. A, B, and C

3. Which is not a virulence factor of N. meningitidis?
         A. capsule
         B. pili
         C. endotoxin
         D. coagulases
       E. invasive proteins

4. Match the Enterobactereaceae group with its description
        1. Coliforms
        2. Non-Coliforms
        3. True Pathogens
        4.All Enterobastereacease genera

         A.glucose fermentors, gram negative rods, facultative anaerobe
         B. virulence factors like toxins make these organisms likely to stablish parasitic infections
         C. ferment lactose, normal microbiota, opportunistic synuses
         D. lactose negative opportunistic pathogens

5. Salmonella sp. are often found as normal flora of humans
     A. True
     B. False

6. The Hib vaccine prevents meningitis in young children
     A. True
     B. False

7. The DTaP vaccine, the 'aP' portion of the vaccine protects against:
         A. dipththeria
         B. strep throat
        C. whooping cough
       D. meningitis

8. Which of these organisms are opportunistic pathogens?
         A. E. Coli
         B. Salmonella sp.
       C. Shigella sp
       D. A and B

9.Members of the Enterobactereaceae family are all pathogenic
     A. True
     B. False

Explanation / Answer

1st ques : Option B endotoxin in cell wall.

2nd ques : Option E

3rd ques : Option E invasive proteins

4th ques : 1 --> C , 2 --> D , 3--> B , 4----> A

5th ques : True

6th ques : True

7th ques : Whopping cough ( C)

8th ques : Option D

9th ques : B false

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