Analysis of Salmonella contamination in food and its detection in cases of infectious diarrhea in Taizhou City from 2015 to 2017
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摘要:
目的 了解泰州市食品及腹泻病例中沙门菌检出分布情况。 方法 采集市售食品样品339份、肉制品生产过程样品201份及病例粪便标本1 606份,按照食品安全国家标准方法对沙门菌进行鉴定及血清学分型。 结果 2015-2017年泰州市9类食品中沙门菌检出率为4.4%(15/339),其中生禽肉、生畜肉和生食动物性水产品检出率分别为27.5%、7.5%、2.5%;肉制品生产过程中沙门菌检出率为6.5%(13/201),原辅料和中间产品检出率分别为35.7%和28.6%;3所医疗机构腹泻病例沙门菌年平均检出率为4.9%(79/1 606),5岁以下人群检出率(7.3%)高于其他年龄组(χ2=20.63,P < 0.01)。腹泻病例可疑暴露食品居前3位的分别为禽、畜肉(28.6%)、乳制品及饮料(25.0%)和水果类(25.0%)。市售食品和患者中共鉴定出21种沙门菌血清型。 结论 泰州市市售食品中沙门菌存在较高的污染率,腹泻病例沙门菌具有较高的检出率,应加强食品的监测、监管和宣传教育。 Abstract:Objective To study the distribution of Salmonella in food and diarrhea cases in Taizhou City. Methods 339 samples of commercially available food, 201 samples of meat production process and 1 606 stool samples of diarrhea cases were collected. Salmonella was identified and serologically classified according to national food safety standards. Results The detection rate of Salmonella in 9 types of foods form 2015 to 2017 was 4.4% (15/339), and the detection rates of raw poultry, raw meat and raw aquatic products were 27.5%, 7.5% and 2.5%, respectively. Among the samples collected during the meat production process, the total detection rate of Salmonella was 6.5% (13/201), and the detection rates of raw materials and intermediate products were 35.7% and 28.6%, respectively. From 2015 to 2017, the average detection rate of Salmonella in stool samples collected from 3 medical institutions was 4.9% (79/1 606). The detection rate of children under 5 years old (7.3%) was higher than other age groups (χ2=20.63, P < 0.01). Among the suspected food items for diarrhea, the top three were poultry and livestock (28.6%), dairy products (25.0%) and fruits (25.0%). A total of 21 Salmonella serotypes were identified from commercially available food and patient samples. Conclusions There is a high pollution rate of Salmonella in commercial food and a high detection rate in diarrhea cases in Taizhou City. Food monitoring, supervision and publicity education should be strengthened. -
Key words:
- Salmonella /
- Surveillance /
- Serotyping
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表 1 不同类别食品样品中沙门菌检出率及血清型鉴定结果
Table 1. Comparison of Salmonella detection rate in different kinds of food samples and serotype identification results
样品类别 样品份数(份) 检出数(份) 检出率[%(95% CI)] 血清型(株数) 生禽肉 40 11 27.5(9.9~33.3) 印地安纳(2)、布雷登尼(1)、基桑加尼(1)、阿贡纳(1)、查理(1)、塔西(1)、凯杜古(1)、斯坦利维尔(1) 生畜肉 40 3 7.5(-1.0~14.9) 生食动物性水产品 40 1 2.5(-2.5~7.4) 蛋及蛋制品 40 0 0.0 熟食肉制品 31 0 0.0 地方特色产品(臭干、鱼饼) 48 0 0.0 冷冻饮品 60 0 0.0 乳制品 16 0 0.0 中式凉拌菜 24 0 0.0 合计 339 15 4.4(2.1~6.3) 注:6株沙门菌血清型未分型。 表 2 不同人口学特征沙门菌检出率及血清型鉴定结果[n(%)]
Table 2. Comparison of detection rates of different demographic characteristics of Salmonella and serotype identification results[n(%)]
影响因素 总人数(人) 检出数 χ2值 P值 血清型(株数) 性别 3.04 0.081 拉古什(27)、都柏林(18)、婴儿(7)、科特布斯(5)、里森(4)、圣保罗(4)、鼠伤寒(3)、肠炎(3)、德尔卑(1)、斯坦利(1)、慕尼黑(1)、芙蓉(1)、伦敦(1)、斯坦利维尔(1) 男 884 51(5.8) 女 722 28(3.9) 年龄(岁) 20.63 <0.001 <5 754 55(7.3) 5~ 167 2(1.2) 18~ 413 9(2.2) ≥50 272 13(4.8) 职业 13.14 0.011 散居儿童 389 27(6.9) 幼托儿童 353 24(6.8) 学生 140 2(1.4) 其他 350 15(4.3) 不详 374 11(2.9) 注:2株沙门菌血清型未分型。 -
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