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Microbiology

Microbiology
Which of the following toxin causing botulism is less toxic to human beings?

Type B
Type A
None of these
Type C

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Microbiology
The technique(s), used for the assay of heat-labile enterotoxin produced by Escherichia coli, is/are

Enzyme-linked immunosorbent assay
All of these
Morphological changes in Chinese hamster ovary
Steroid production in Yl mouse adrenal cell culture

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Microbiology
Traveller's diarrhea is caused by

entero toxigenic E. coli (ETEC)
entero haemorrhagic E. coli (EHEC)
enteropathogenic Escherichia coli (EPEC)
entero invasive E. coli (EIEC)

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Microbiology
Bipolar staining is characteristic of

Yersinia pestis
all of these
Pseudomonas aeruginosa
Proteus mirabilis

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Microbiology
Which of the following is/are not a gram-positive bacteria?

Streptococci
Mycobacteria
None of these
Pseudomonas

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Microbiology
Which of the following property(ies), shown by the organisms belong(s) to the family Enterobacteriaceae?

All of these
They are catalase-positive
They ferment glucose
They are oxidase-negative

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