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Microbiology

Microbiology
Gassy spoilage of green olives is usually caused by

all of these
Bacillus spp
Enterobacter spp
Clostridium spp

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Microbiology
Which of the following media is selective for Salmonella?

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

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Microbiology
The favouring conditions for floaters is

high intial amounts of salt
both (a) and (b)
thick skin that does not allow gas to diffuse out
none of these

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Microbiology
Cloudiness of brine of glass-packed olives may be caused by

the lactics if fermentation of residual sugar resumes
All of these
salt-tolerant bacteria
film yeasts or moulds if air is available

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Microbiology
Hollow pickles are obtained as a result of

none of these
loose packing in the vat
both (a) and (b)
too strong or too weak brine

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Microbiology
Which of the following gram-positive bacteria causes pharyngitis (sore throat)?

Staphylococcus
Streptococcus
Neisseria
Mycobacterium

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