Mcq Subject: Microbiology

An enzyme produced by Staphylococcus aureus that dissolves fibrin clots is:

A. Hyaluronidase

B. Catalase

C. Staphylokinase

D. Lipase

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Bejel is caused by –

A. T. pallidum

B. T. endemicum

C. T. pertenue

D. T. carateum

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A person with AIDS related complex is most likely suffering from:

A. Oppuinistic infection

B. Cancer related to AIDS

C. Generalized lymphadenopathy

D. Herpes zoster

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Which of the following immunoglobulin is a pentamer?

A. IgG

B. IgA

C. IgM

D. IgD

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This virus causes a mononucleosis-like syndrome caused by a latent herpesvirus; it is often a congenital infection. Large amounts of the virus are excreted in the urine; thus, urine becomes the fluid of choice for diagnosis of this disease.

A. Epstein-Barr virus

B. Cytomegalovirus

C. HHV-6

D. Parvovirus

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Antibody in cold agglutin disease is

A. IgA

B. IgG

C. IgE

D. IgM

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Which of the following is detected by the antigen detection test used for the diagnosis of P. Falciparum malaria

A. Circum-sporozoite protein

B. Merozoite surface antigen

C. Histidine-Rich-Protein I (HRP-I)

D. Histidine-Rich-Protein II (HRP-II)

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Superantigens area) Erythrotoxin of Staph. aureusb) Clostridium difficile toxinc) Staphyloccocal toxic shock syndrome toxind) Cholera toxin

A. a

B. bc

C. ad

D. ac

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Parvovirus B19 does not cause:

A. Roseola infantum

B. Aplastic anemia in sickle cell disease

C. Fetal hydrops

D. None of the above

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Verocytotoxin of E. coli acts by –

A. Increasing cAMP

B. Decreasing cAMP

C. Decreasing protein synthesis

D. Decreasing cGMP

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