engleski

Microbiological contamination of dairy cow barn air and milk according to seasons

In this study, bacteriological air contamination in a dairy cow barn was assessed according to microclimate parameters in various seasons ; the results obtained were then compared with the microorganism count in raw milk. Total bacterial count in the barn air was significantly higher (P<0.05) in warm period and vice versa, accompanied by the same trend in the microorganism count recorded in raw milk. High positive correlation was found among bacterial count in barn air, barn air temperature and microorganism count in milk (P<0.05 all). In conclusion, bacterial count in barn air and consequently postsecretory milk contamination depend on the season, i.e. barn air temperature.

dairy cow; microclimate; air bacteria; milk quality

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