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Variation of pyruvate and ammonia contents in raw milk from individual animals to factory silo tanks and relationship with viable bacterial content



Variation of pyruvate and ammonia contents in raw milk from individual animals to factory silo tanks and relationship with viable bacterial content



Kieler Milchwirtschaftliche Forschungsberichte 34(1): 134-138



A survey involving 170 herd bulk milks collected every other day showed significant but low correlations between standard plate count (SPC) and pyruvate (r = 0.41) or ammonia (r = 0.48); geometric mean of SPC was 180 000 c.f.u./ml. These poor correlations were attributed to the large variation in initial levels of pyruvate and ammonia, the influence of somatic cells on pyruvate, and large variation in the amounts of pyruvate and ammonia accumulated during storage due to the bacterial flora.

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