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Microbiology

Microbiology
Primarily human pathogenic bacteria is/are ,

all of these
S paratyphi B
Salmonella typhi
S paratyphi A

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Microbiology
In Widal test the significant titres for H agglutinins is

1:100 ormore
1:200 or more
1:50 or more
1:400 or more

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Microbiology
Bacterial spoilage is identified by which of the following morphological characteristics?

All of these
Cell aggregation
Endospores
Encapsulation

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

29°C
45°C
25°C
37°C

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Microbiology
Selective media for the isolation of Shigella is

Hektoen enteric agar
All of these
Xylose lysine deoxycholate agar
Salmonella-Shigella agar

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Microbiology
The application of Gamma rays destroys botulism toxin. The dose of gamma rays required for this purpose is

73 Gy
7.3 Mrad
173 Rad
73 Rad

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