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Microbiology

Microbiology
The botulism intoxication occurs due to

neurotoxin
all of these
an enterotoxin
mycotoxin

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Microbiology
The growth of black-pigmented Bacillus nigrificans, a causative agent of black pickle is favoured by

All of these
neutral or slightly alkaline brine
presence of carbohydrate like glucose
low level of available nitrogen

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

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

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Microbiology
Prodigiosin (red pigment) is produced by members of genus

Serratia
Hafnia
Enterobacter
Cirobacter

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Microbiology
Bipolar staining is characteristic of

Proteus mirabilis
all of these
Pseudomonas aeruginosa
Yersinia pestis

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Microbiology
Which of the following media is selective for Salmonella?

Wilson and Blair's brilliant-green bismuth sulphite agar medium
Bile salt agar
All of these
Thiosulphate citrate bile salt agar

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