婴儿配方粉及生产加工环节微生物污染情况调查

Investigation on microbial contamination of infant formula powder during production process

目的了解婴儿配方粉及生产加工环节中微生物污染状况。方法采自某企业婴儿配方粉原料、设备、人员及成品等共880份样品,按SN/T 0738—1997《出口食品中肠杆菌科检验方法》和GB 4789系列规定的方法进行肠杆菌科、阪崎肠杆菌和蜡样芽胞杆菌检测。结果肠杆菌科检出率为28.41%(250/880),阪崎肠杆菌检出率为0.46%(4/872),蜡样芽胞杆菌检出率为16.94%(31/183);原料中肠杆菌科污染最高(40.00%,40/100);预处理车间人员、设备和环境表面共检出4株阪崎肠杆菌;成品中蜡样芽胞杆菌检出率为22.73%(10/44)。结论婴儿配方粉及生产加工环节均存在微生物污染情况,企业及相关部门应从原料、生产环节、环境等多方面严格把关,确保产品质量。

Objective The aim of this study was to investigate the microbial contamination situation in infant formula powder during the processes of production. Methods A total of 880 samples were collected from Gansu Province,which included raw materials,manufacturing facilities,personnel swabs and final infant formula powder. The detection method conducted in this study were complied with the standard of the SN/T 0738-1997 and GB 4789,and the microbial species detected in this study included Enterobacteriaceae,Enterobacter sakazakii,and Bacillus cereus. Results The detection rate of Enterobacteriaceae was 28. 41%（ 250/880）,the detection rates of Enterobacter sakazakii and Bacillus cereus were0. 46%（ 4/872） and 16. 94%（ 31/183） respectively. The prevalence of Enterobacteriaceae（ 40. 00%,40/100） was the highest in raw materials. Four Enterobacter sakazakii strains were isolated from the pretreatment workshop,equipment and environment surface. The prevalence of Bacillus cereus was 22. 73%（ 10/44） in final product. Conclusion The microbial contamination was existent widely in infant formula powder and the production procession. Rigid laws and managements should be conducted to reduce the microbial contamination in raw materials,production processes and the environment,which might improve the quality of infant formula powder.