Microbiological quality of raw cow milk
1995
Kriengsag Saitanu | Rungtip Chuanchuen | Suphachai Nuanuansuwan (Chulalongkorn Univ., Bangkok (Thailand). Faculty of Veterinary Science. Dept. of Veterinary Public Health)
Total bacterial count and coliform count of raw milk collected at farm were significantly lower than those collected at the milk collection conters (MCC). It indicated that the number of bacteria in milk collected at MCC were increased. The percentage of the samples collected at farm and at MCC with total count did not exceeded 500,000 CFU/ml were 77.85 percent and 61.97 percent respectively, with coliforms count did not exceeded 1,000 CFU/ml were 69.44 percent and 57.33 percent respectively, with psychrotrophs did not exceeded 3,000 CFU/ml were 85.63 percent and 85.24 percent respectively. Most of the samples, 98.31 percent, sampling at farm and 90.25 percent sampling at MCC contained thermophiles lower than 500 CFU/ml. The majority of the samples contaminated with proteolytic and lipolytic bacteria lower than 100,000 CFU/ml. Yeast and moulds were frequently detected in most of the samples. Human pathogens were not founded excepted Salmonella spp. which were positive in 6 samples (2.3 percent).
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