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When performing a CMT test, watch for color changes and gel formation. Milk from a normal quarter does which of the following?

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When performing a CMT test, watch for color changes and gel formation. Milk from a normal quarter does which of the following?

(a) Forms a gelatinous mass clinging together in a strong reaction

(b) Flows freely without change in viscosity

(c) Forms small clumps in a moderate reaction

(d) Turns a deep purple color

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This interesting question is from Dairy Facts topic in division Dairy Laws of Dairy Engineering

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Right choice is (b) Flows freely without change in viscosity

Easy explanation: The purple color that results from the test is generally more intense in samples from infected quarters. This is because such samples have a basic or alkaline pH. The deep purple color indicates abnormal composition of milk. It means the mammary gland is infected. Also, the gel formation occurs of the infected milk. However, normal milk does not show any change and flows freely.

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