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Microbiology

Microbiology
Gassy spoilage of green olives is usually caused by

Bacillus spp
Enterobacter spp
all of these
Clostridium spp

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Microbiology
Which of the following genus belongs to family Spirochaetaceae?

Treponema
All of these
Borrelia
Spirochaeta

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

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

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Microbiology
Which of the following can readily kill Salmonellae?

Moist heat at 55°C for 30 min
Moist heat at 55°C for 20 min
Moist heat at 55°C for 10 min
Moist heat at 55°C for 1 hr

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Microbiology
A bacterial food intoxication refers to

food borne illness caused by the presence of a bacterial toxin formed in food
both (a) and (b)
None of these
illness caused by presence of pathogens

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Microbiology
Arrange the potencies of toxin in descending order of the following canned foods

corn> string bean>peas>spinach
corn> peas>string beans>spinach
corn> spinach> peas>string beans
peas>string beans>spinach> corn

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