LPT-0104
QUESTION
An indirect quality control testing for estimating bacterial density in milk?
OPTIONS
(A) DEFT
(B) DMC
(C) Pyruvate test
(D) SPC
ANSWER
(C) Pyruvate test
EXPLANATION
The pyruvate test estimates microbial activity indirectly because bacterial metabolism in milk is associated with pyruvate formation and turnover, allowing an indirect assessment of bacterial density or quality. DEFT, direct microscopic count, and standard plate count are direct or enumeration-oriented methods. Hence, option (C) is correct.
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