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Microbiology

Microbiology
Primarily human pathogenic bacteria is/are ,

S paratyphi B
all of these
S paratyphi A
Salmonella typhi

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Microbiology
Selective media for the isolation of Shigella is

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

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Microbiology
Salmonellois is caused by the

endotoxin of Salmonella spp
neurotoxin of Salmonella spp
exoenterotoxin of Salmonella spp
enterotoxin of Salmonella spp

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Microbiology
Yersinia enterocolitica and Y. pestis can be differentiated on the basis of which of the following tests?

Motility at 22°C
Fermentation of sucrose and cellobiose
Decarboxylation of ornithine
All of these

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Microbiology
Which of the following serotypes of Salmonella does not produce H2S?

S paratyphi A
Both (a) and (b)
S choleraesuis
None of these

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Microbiology
Heat-stable enterotoxin of Escherichia coli activates

none of these
adenylate cyclase
both of the above
guanylate cyclase

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