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Microbiology

Microbiology
Bacteria are

saprophytic
hyper parasitic
all of these
symbiotic

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Microbiology
In Widal test, the significant titre for O agglutinins is generally

1:150 or more
1:100 or more
1:50 or more
1:2.00 or more

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Microbiology
Which of the following determine the pathogenicity of Yersinia pestis?

All of these
F1 envelope antigen
Production of pigmented colonies on haemin containing media
V and W antigens

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Microbiology
Shriveling in fermented pickles results from the physical effect of

too strong sugar solution
all of these
too strong salt solution
too strong vinegar solution

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Microbiology
Which of the following species/subspecies of Klebsiella produce indole?

K oxytoca
K pneumoniae subspecies pneumoniae
K pneumoniae subspecies aerogenes
K pneumoniae subspecies rhinoscleromatis

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Microbiology
In Yersinia pestis, capsule is best demonstrated in cultures grown at

29°C
45°C
37°C
25°C

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