鄂西北地区食源性金黄色葡萄球菌污染及耐药性和毒力基因分析
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(湖北文理学院医学院,湖北 襄阳 441053)

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赵朵 女 本科生 研究方向为细菌耐药与分子分型 E-mail:zhaoduo1998@163.com 唐一通 男 副教授 研究方向为细菌耐药与分子分型 E-mail:yitongtang@126.com

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襄阳市科技研究与开发项目[襄科计(2017)10号];湖北省自然科学基金项目(2016CFB319);湖北文理学院青年学者建设基金(F614)


Analysis of resistance and virulence genes of foodborne Staphylococcus aureus in northwestern Hubei Province
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(Medicine College, Hubei University of Arts and Science, Hubei Xiangyang 441053, China)

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    摘要:

    目的 了解鄂西北地区食源性金黄色葡萄球菌的检出情况、耐药性以及毒力基因分布特征。方法 从湖北省襄阳市、十堰市、随州市三地共采集303份食物样品进行金黄色葡萄球菌筛查,通过聚合酶链式反应(PCR)法进行耐甲氧西林金黄色葡萄球菌(methicillin-resistant Staphylococcus aureus,MRSA)的鉴定和毒力基因检测,并用K-B纸片扩散法进行耐药性测定。结果 303份样品中共有41份检出金黄色葡萄球菌,阳性率为13.53%,其中生肉制品检出率最高(23.91%,22/92)。在产肠毒素菌株中以携带产肠毒素基因sea的菌株最多,占87.80%(36/41)。携带表皮剥脱素基因eta和中毒性休克综合征毒素基因tst的菌株分别占97.56%(40/41)和7.32%(3/41)。同时携带3种及以上肠毒素基因的菌株占17.07%(7/41)。同时含有eta和tst的菌株占2.44%(1/41)。药敏结果显示,分离菌株对青霉素、四环素、红霉素和多西环素的耐药率分别为78.05%(32/41)、43.90%(18/41)、31.71%(13/41)和21.95%(9/41),对其他8种抗菌药物的耐药率均<20%。mecA基因检测表明,19.51%(8/41)的菌株为MRSA,且7株MRSA菌株来源于生肉制品和未加调料的素卤菜。结论 鄂西北地区食源性金黄色葡萄球菌具有较高的检出率,而且产毒株较多,并且存在多重耐药现象,相关部门需加强食品安全监测以控制该菌株的流行与扩散。

    Abstract:

    Objective To understand the prevalence, drug resistance, and virulence gene distribution of foodborne Staphylococcus aureus in northwestern Hubei Province. Methods A total of 303 food samples were collected from Xiangyang City, Shiyan City, and Suizhou City of Hubei Province for Staphylococcus aureus screening. Toxic genes and methicillin-resistant Staphylococcus aureus(MRSA)were detected with PCR method. The drug resistance of Staphylococcus aureus was determined with K-B paper diffusion method. Results Staphylococcus aureus strain was determined from 41 samples with the positive rate of 13.53%. Among them, the highest detection rate was from raw meat products (23.91%, 22/92). Among the enterotoxigenic strains, the strain carrying sea was the most common, accounting for 87.80% (36/41). The strains carrying eta and tst accounted for 97.56% (40/41) and 7.32% (3/41), respectively. Strains carrying three or more enterotoxin genes accounted for 17.07% (7/41). 2.44% (1/41) of strains carry eta and tst simultaneously. The drug susceptibility result showed that the penicillin, tetracycline, erythromycin, and doxycycline accounted for 78.05%(32/41), 43.90%(18/41), 31.71%(13/41)and 21.95%(9/41)respectively. The mecA gene test showed that 19.51% (8/41) of the strains were MRSA strains. Conclusion Foodborne Staphylococcus aureus in northwestern Hubei Province had a higher detection rate, toxic gene carring rate, and multiple drug resistance. Related departments need to strengthen food safety monitoring to control the spread of the strain.

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赵朵,裴曼君,张文乐,梁冉,肖娜,唐一通.鄂西北地区食源性金黄色葡萄球菌污染及耐药性和毒力基因分析[J].中国食品卫生杂志,2020,32(6):620-625.

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  • 收稿日期:2020-09-09
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  • 在线发布日期: 2021-02-18
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