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Quiz online 16 March 2012

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1Quiz online 16 March 2012 Empty Quiz online 16 March 2012 Tue Mar 20, 2012 7:13 pm

ismipahmie

ismipahmie
Star Member
Star Member

1. Diphteria toxin is only produce by those strain of C.diphtheriae that are?

a) Glucose fermenters
b) Sucrose fermenters
c) Lysogenic for prophage
d) Of the mitis strain.

2. List 3 bacteria used as an indicator of faecal pollution of water.

3. Give reasons.
a) A person can catch repeated attack of common cold during the same seasons.

b) Tuberculin test may give false positive reaction

c) Hepatitis D virus is a defective virus.

2Quiz online 16 March 2012 Empty Answers: Tue Mar 20, 2012 7:14 pm

ismipahmie

ismipahmie
Star Member
Star Member

1. C (refer pg 23 vol.2)

2. escherichia coli,enterococcus faecalis,clostridium perfringens. ( refer pg 54 vol. 2 )

3.
a)•Multiplicity of antigenic type(over 100)
•Being a superficial infection,serum antibodies plays no significants role in immunity
•Immunity is mainly superficial by Ig A and interferon(short term immunity).
(refer pg 27 vol.3)

b)•Infection with non tuberculous mycobacteriae(NTMO) due to cross reaction with M.tuberculosis antigens.
•Vaccination with bacille Calmette-Guerin(BCG).After BCG vaccination,tuberculin skin test remain positive for up to 5 years.
(refer pg 46 vol.2)

c)HDV can only replicate in patients with HBV infection.
(refer pg 14 vol 3)

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