15 colostrum and 15 mature milk were examined in bacteriology laboratory in Ankara Numune Hospital. The number of colonies cultured at "0" hour, 6-24 after at room temperature 24 after refrigeration were evaluated. It was noticed that the cultures obtained at 0 and 6 hours and after refrigeration did not reveal much bacteria. But cultures obtained from Colostrum and mature milk after 24 hours at room temperature revealed colonies. The colonisation in mature milk was significantly higher than the colostrum.
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