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Microbiological Testing Methods in Food and Beverages Lab

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Microbiological Testing Methods in Food and Beverages Lab

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Questions and Answers

What is the quality of milk if the reduction occurs within 30 minutes in the dye reduction test?

Fair quality (class 2 milk)

Poor milk quality (class 3 milk)

Good quality (class 1 milk)

Very poor milk quality (class 4 milk) (correct)

What is the purpose of serial dilution in microbiology?

To eliminate all bacteria from a sample

To increase the bacterial concentration for a test method

To decrease the bacterial concentration to a required concentration for a specific test method (correct)

To count bacteria directly on an agar plate

What is the minimum quality requirement for untreated milk sold directly to consumers?

Pass a 30°C colony count test and a coliform test (correct)

Class 2 milk

Class 1 milk

Class 3 milk

What is CFU an abbreviation for?

Colony Forming Unit Signup and view all the answers

What is the purpose of the dye reduction test?

To determine the quality of milk Signup and view all the answers

Which test must cow's milk satisfy to be exported to other countries?

A Staphylococcus aureus test and a Salmonella test Signup and view all the answers

What type of milk requires a Staphylococcus aureus test and a 30°C colony count test?

Untreated milk for making dairy products Signup and view all the answers

What is the function of Maximum Recovery Diluents (MRD)?

To provide optimal conditions for bacterial recovery Signup and view all the answers

What is the purpose of plating diluted samples?

To count bacteria on an agar plate Signup and view all the answers

What type of test is used to determine the quality of milk?

Dye reduction test Signup and view all the answers