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Microbiology

Microbiology
Gassy spoilage of green olives is usually caused by

Enterobacter spp
Bacillus spp
all of these
Clostridium spp

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

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

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Microbiology
Which of the following property(ies) is/are seen in the members of family Enterobacteriaceae?

They are catalase-positive
They are oxidase-negative
They ferment glucose
They reduce nitrates to nitrites

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Microbiology
Enterobacter can be differentiated from Klebsiella by

motility
ornithine positivity
both (a) and (b)
none of these

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Microbiology
Salmonellois is caused by the

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

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Microbiology
The agent(s) which can cause plague is/are

Yersinia pestis
Proteus mirabilis
Pseudomonas aeruginosa
All of these

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