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草莓微生物污染分析及革兰氏阴性细菌和霉菌鉴定
Analysis of microbial contamination and identification of gram negative bacteria and mold in strawberry
【摘要】 为评估草莓的微生物污染情况,在2016年3—4月份对浙江地区基地温棚和市售草莓进行随机抽样,分析草莓中菌落总数、大肠菌群、霉菌,并运用全自动微生物分析系统(VITEK)和分子生物学技术,分别对分离的革兰氏阴性细菌和霉菌进行了鉴定。结果表明:温棚草莓菌落总数为12048 600 cfu·g-1,大肠菌群为31 100 MPN·g-1,霉菌为02 900 cfu·g-1;市场草莓菌落总数为1 90036 900 cfu·g-1,大肠菌群为151 100 MPN·g-1,霉菌为2006 100 cfu·g-1;同时鉴定出大肠埃希菌(Escherichia coli)、阴沟肠杆菌(Enterobacter cloacae)、河生肠杆菌(Enterobacter.amnigenus)、植生拉乌尔菌(Raoultella planticola)等19株革兰氏阴性细菌和毛霉属(Mucor)、镰刀菌属(Fusarium)等5株霉菌,所检出的革兰氏阴性细菌和霉菌多数具有较强的致病性。研究结果为草莓微生物数量的控制和开发杀菌抑菌技术提供了参考。
【Abstract】 In order to evaluate the status of microbial contamination in strawberry,hygienical microbiology was examined from strawberry which sampled in greenhouse and market of Zhejiang Province during March to April in 2016 year according to the food hygiene standard of People Republic of China. Then bacteria counting,enumeration of coliforms and mold detection were carried out. The bacteria and mold which were isolated from the samples were identified by Vitek Auto Microbic System and Molecular biological methods,respectively. The results indicated that the number of bacteria,coliforms and mold of strawberry in greenhouse ranged from 120 to 48 600 cfu·g-1,from 3 to 1 100 MPN·g-1,from 0 to 2 900 cfu·g-1,respectively. And the number of bacteria,coliforms and mold of strawberry in market ranged from 1 900 to 36 900 cfu·g-1,from 15 to 1 100 MPN·g-1,from 200 to 6 100 cfu·g-1,re-spectively. Meanwhile,19 gram negative bacteria species such as Escherichia coli,Enterobacter cloacae,Enterobacter amnigenus,Raoultella planticola and 5 mold species such as Mucor and Fusarium were identified. Most of the identified bacteria and mold had serious pathogenicity. The experimental results would be helpful to control the number of microorganisms and develop new sterile technology for strawberry.
- 【文献出处】 浙江农业学报 ,Acta Agriculturae Zhejiangensis , 编辑部邮箱 ,2017年01期
- 【分类号】S436.68
- 【被引频次】10
- 【下载频次】296