MMB621S MEDICAL MICROBIOLOGY 2B: 2nd OPPORTUNITY QUESTION PAPER
JANUARY 2023
1.8 Novobiocin are used to distinguish between:
A) Staphylococcus epidermidis & Staphylococcus saprophyticus.
B) Staphylococcus aureus & Staphylococcus saprophyticus.
C) Streptococcus spp and Staphylococcus spp.
D) Staphylococcus aureus & Staphylococcus epidermidis.
[1]
1.9 Virulence factors of Streptococcus pyogenes that aids the organism to escape
host defense is(are):
A) The outermost capsule of hyaluronic acid.
B) Streptokinases A & B lyse.
C) Hyaluronidase.
D) All of the above.
[1]
1.10 The Salmonellae Vi antigen:
A) Is an acidic polysaccharide antigen that overlay the O antigen.
B) Exhibit the property of diphasic variation
C) Are fimbria antigens
D) Are determined by the complete sugar sequence.
[1]
QUESTION 2
[15]
Assess the following statements and decide whether they are true or false. Write only
the number of the question and next to it TRUE for a true statement and FALSE for a
false statement and give a reason for calling a statement FALSE.
2.1 Klebsiella pneumoniae form mucoid non-lactose fermenting colonies on the
MacConkey agar.
2.2 S. saprophyticus are the only causative organism of Toxic Shock Syndrome.
2.3 Aerotolerant organisms will grow scanty in air and good growth when
anaerobic
2.4 OrthoNitroPhenyl-~-0-Galactopyranoside test detects ~-galactosidase.
2.5 Human infections with Bruce/la melitensis are associated with cattle.
2.6 Gram negative, oxidase positive diplococci, are diagnostic for Neisseria
gonorrhoea infections in female patients.
2.7 Bubonic plaque is associated with Clostridium.
2.8 Metronidazole has no effect against many anaerobes.
2.9 The anthrax toxin causes an increase in vascular permeability resulting in
shock.
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