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目的了解成都市市售国产婴幼儿配方奶粉中阪崎肠杆菌污染情况,为制定婴幼儿配方奶粉阪崎肠杆菌的限量标准提供科学依据。方法对2006-09/2007-03采集的80份市售婴幼儿配方奶粉进行菌落总数、大肠菌群及阪崎肠杆菌的检测,并对分离的阪崎肠杆菌进行药敏试验。结果所有检测样品中,有5份样品检出阪崎肠杆菌,阳性率为6.25%,且其中4份样品的菌落总数、大肠菌群均合格。分离的阪崎肠杆菌对常用抗生素普遍敏感。结论市售国产婴幼儿配方奶粉中存在少量阪崎肠杆菌污染,应尽快制定婴幼儿配方奶粉中适宜的阪崎肠杆菌微生物限量标准和相应检验方法。
Objective To understand the contamination of Enterobacter sakazakii in domestic infant formula developed in Chengdu and to provide a scientific basis for formulating the limited standard of Enterobacter sakazakii for infant formula. Methods The total number of colony, coliforms and Enterobacter sakazakii in 80 commercially available infant formula collected from September 2006 to March 2007 were tested. Susceptibility tests of isolated Enterobacter sakazakii were carried out. Results Among all test samples, 5 samples were positive for Enterobacter sakazakii, with a positive rate of 6.25%. The total colony counts and coliforms of 4 samples were all qualified. Isolated E. sakazakii is generally sensitive to commonly used antibiotics. Conclusions There is a small amount of Enterobacter sakazakii contamination in the domestic infant formula milk powder. The limit of microorganisms and corresponding test methods of Enterobacter sakazakii in infant formula should be established as soon as possible.