MULTIPLE CHOICE QUESTIONS

1. MEDICAL MICROBIOLOGY
1. What is the colour coding of the bag used in hospitals to dispose off human anatomical wastes such
as body parts:
a) Yellow
b) Black
c) Red
d) Blue
2. Each of the following organisms is an important cause of urinary tract infections except:
a) Klebsiella pneumoniae
b) Escherichia coli
c) Bacteriodes fragilis
d) Proteus mirabilis
3. An outbreak of sepsis caused by Staphylococcus aureus has occurred in the newborn nursery. You
are called upon to investigate. According to your knowledge of the normal flora, what is the most
likely source of the organism?
a) Nose
b) Colon
c) Hand
d) Throat
4. Stool culture is primarily recommended when the complaint is
a) bloody diarrhea (dysentery, enterocolitis)
b) watery diarrhea
c) for both bloody and watery diarrhea
d) an indication of anaerobic infection
5. Throat culture is not useful to diagnose
a) Streptococcal sore throat
b) Diphtheria
c) Thrush
d) Pneumonia
6. Which of the following bacteria is not a most common bacterial pathogen causing diarrhea?
a) Shigella spp
b) Salmonella spp
c) Enterococcus faecalis
d) Campylobacter spp
7. Among the following which microorganism acts as a representative of faecalstreptococci group?
a) Streptococcus faecalis
b) Streptococcus bovis
c) Streptococcusequinus
d) Streptococcus faecium
8. Which containers should use to dispose contaminated waste like plastic bags, bottles, pipes and
containers?

2. a) Red containers.
b) Sharps containers.
c) Containers lined with yellow bags.
d) Containers lined with black bags.
9. Within how many days after birth a stable flora develops?
a) 1 day
b) 7 days
c) 30 days
d) 7-14 days
10. Nose and skin are best 'anatomic' location for
a) Bacteroides species
b) Gardnerrella vaginalis
c) Enterococcus
d) Staphylococcus aureus
11. It is true regarding the normal microbial flora present on the skin and mucous membranes that:
a) lt cannot be eradicated by antimicrobial agents
b) It is absent in the stomach due to the acidic pH
c) It establishes in the body only after the neonatal period
d) The flora in the small bronchi is similar to that of the Trachea
12. 'Klebsiella' is residing in
a) Gut of human
b) Colon of human
c) Nose of humans
d) Eyes of humans
13. M. 'tuberculosis' initial site for infection is
a) Skin
b) Lungs
c) Mucous
d) Nucleic acid
14. Causative agent for 'acne' in teenagers is caused by
a) Porphyromonas
b) Propionibacterium acne
c) Pleisomonas
d) Peptococcus
15. 'Lactobacillus' is a human pathogen that is also part of normal flora and found in
a) Colon
b) Mouth
c) Genital Tract of female
d) All of above
16. The microorganisms stick to which of the following regions of the respiratory tract?
a) Nasalbaffle

3. b) Nasopharynx
c) Mucus
d) Oropharynx
17. Saliva generally has a microbial population of _______ bacteria per millilitre.
a) 100
b) 1000
c) 105
d) 108
18. Enterococci is found in which part of the intestine?
a) duodenum
b) jejunum
c) ileum
d) large intestine
19. Which body part contains the largest microbial population?
a) stomach
b) small intestine
c) large intestine
d) mouth
20.Which of the following species of Pasteurella species has been associated with infections of the
female genital tract and of new-born?
a)Pasteurella multocida
b)Pasteurella pneumotropica
c)Pasteurella ureae
d)Pasteurella bettyae