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Microbiology

Microbiology
Primarily human pathogenic bacteria is/are ,

S paratyphi B
S paratyphi A
Salmonella typhi
all of these

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Microbiology
Slippery pickles occur due to

broken scums of film yeasts on the surface of brine
both (a) and (b)
addition of high amount of salt
growth of encapsulated bacteria

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Microbiology
Coliform bacteria on fermentation of carbohydrates yields

all of these
formic acid
lactic acid
acetic acid

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Microbiology
The bacteria that is negative for fermentation of mannitol is

S flexneri
S boydii
S dysenteriae
S sonnei

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Microbiology
Slimy or ropy kraut is caused by

encapsulated varieties of Lactobacillus plantarum
None of these
encapsulated varieties of Lactobacillus brevis
Lactobacillus lactis

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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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