金黄色葡萄球菌在生乳与灭菌乳中生长状况分析

目的 了解并比较金黄色葡萄球菌(S.aureus)在生乳与灭菌乳中的生长状况.方法 采用GB/T4789.37-2008<食品微生物学检验金黄色葡萄球菌检验>,测定不同温度下金黄色葡萄球菌在生乳和灭菌乳中的生长情况,利用MicroFit 1.0软件对所测数据进行分析,利用SPSS统计软件对该菌在生乳与灭菌乳中生长参数进行统计分析.结果 金黄色葡萄球菌在生乳中的最大生长速率明显低于在灭菌乳中的最大生长速率,二者的迟滞期、代时无明显差异.结论 金黄色葡萄球菌在生乳与灭菌乳中的生长情况差异显著.有统计学意义(P<0.05).

Analysis on the growth of Staphylococcus aureus in raw milk and sterilized milk

Objective To investigate and compare the growth of Staphylococcus aureus(S.aureus) in raw milk and sterilized milk. Method The growth of S. aureus in raw milk and sterilized milk at different temperature was surveyed by using the third method of GB/T4789.37-2008. The data were analyzed with MicroFit 1.0 software, and the parameters on the growth of S. aureus were analyzed with SPSS statistical software. Results The maximum growth rate (mumax) of S.aureus in raw milk was lower significantly than that in sterilized milk. There was no significant difference on lag time and doubling time of S. aureus both in raw milk and sterilized milk. Conclusion The statistical analysis results showed that the growth of S.aureus in raw milk and sterilized milk was different significantly (P<0.05).