Milk and Milk Products
Swelling of the can is caused primarily by

gas forming, aerobic spore formers
gas forming, anaerobic spore formers
none of these
both (a) and (b)

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Milk and Milk Products
Non bacterial ropiness or sliminess in milk and milk products may be due to the

stringiness due to thin films of casein or lactalbumin during cooling
sliminess resulting from the thickness of the cream
stringiness caused by mastitis and in particular by fibrin and leucocytes from the cow's blood.
All of these

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