Parker E M, Edwards L J, Mollenkopf D F, Ballash G A, Wittum T E, Parker A J
The Department of Animal Sciences, Ohio Agricultural Research and Development Center, The Ohio State University, 1680 Madison Avenue Wooster, Ohio, 446911.
Ridley AgriProducts Pty Ltd, 70-80, Bald Hill Road, Pakenham, Victoria, 3810, Australia.
Aust Vet J. 2019 Sep;97(9):336-342. doi: 10.1111/avj.12851. Epub 2019 Jul 22.
The availability of safe, commercially prepared stock feed for production animals is an important step in ensuring animal health and welfare and the safety of food animal products for human consumption. Animal feed quality assurance programs include microbiological monitoring of raw materials, mill equipment and finished feed. Over a period of 16 years, 23,963 samples for Salmonella culture and serotyping were collected from 22 stock feed mills. A multivariable generalized linear mixed model (GLMM) was used to identify mill and sample type factors that increase the odds of detecting Salmonella. The odds of detecting a Salmonella positive sample was greatest in samples from raw materials and in mills that processed restricted animal material (RAM). The percentage of positive samples ranged from 7.2% in 2003 to 2.8% in 2017. Of the 1,069 positive samples, 976 were serotyped with 61 different Salmonella serotypes isolated. The serotype most frequently isolated from raw materials was S. Agona, (n = 108) whilst S. Anatum was the serotype most frequently isolated from equipment and finished feed (n = 156). The diversity of Salmonella serotypes differed between mills and different stages of the production line. Microbiological monitoring in the commercial preparation of animal feed in Australian stock feed mills guides the implementation of quality control measures and risk mitigation strategies thereby reducing the prevalence and diversity of potentially zoonotic bacteria such as Salmonella, enhancing food safety for both animal and consumer.
为生产用动物提供安全的、商业制备的饲料是确保动物健康和福利以及供人类食用的食用动物产品安全的重要一步。动物饲料质量保证计划包括对原材料、工厂设备和成品饲料进行微生物监测。在16年的时间里，从22家饲料厂收集了23963份用于沙门氏菌培养和血清分型的样本。使用多变量广义线性混合模型（GLMM）来确定增加检测到沙门氏菌几率的工厂和样本类型因素。在原材料样本和加工受限动物材料（RAM）的工厂中，检测到沙门氏菌阳性样本的几率最高。阳性样本的百分比从2003年的7.2%到2017年的2.8%不等。在1069份阳性样本中，976份进行了血清分型，分离出61种不同的沙门氏菌血清型。从原材料中最常分离出的血清型是阿哥纳沙门氏菌（n = 108），而从设备和成品饲料中最常分离出的血清型是阿纳托姆沙门氏菌（n = 156）。不同工厂和生产线不同阶段的沙门氏菌血清型多样性有所不同。澳大利亚饲料厂对动物饲料商业制备过程进行微生物监测，为质量控制措施和风险缓解策略的实施提供指导，从而降低沙门氏菌等潜在人畜共患病细菌的流行率和多样性，提高动物和消费者的食品安全。
