title: Sources and routes of contamination of raw milk with Listeria monocytogenes and its control.
abstract: To identify the source of contamination of raw bulk milk with Listeria, we attempted to isolate the bacteria from various samples such as cattle-related samples, bulk storage tanks and the environments on three farms. On farms A and B, Listeria monocytogenes was repeatedly isolated from raw milk, while on farm C, it was scarcely isolated from it. On the former farms, Listeria was detected in cattle-related samples and the environments. On the other hand, only one fecal sample on the latter farm was Listeria-positive. Especially, we demonstrated that the bulk tank on farm A was contaminated with L. monocytogenes. Then, L. monocytogenes was controlled by continuously washing the bulk tank on farm A with alkaline detergent.
authors.affiliation: Division of Food Hygiene, Nagano Research Institute for Health and Pollution, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Yoshida
authors.forename: Y
authors.initials: Y
authors.lastname: Kato
authors.forename: M
authors.initials: M
authors.lastname: Sato
authors.forename: K
authors.initials: K
authors.lastname: Hirai
mesh_terms: D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000453:epidemiology / Q000517:prevention & control*; D004196:Disease Outbreaks / Q000517:prevention & control / Q000662:veterinary*; D005243:Feces / Q000382:microbiology; D005260:Female; D007564:Japan / Q000453:epidemiology; D008089:Listeria monocytogenes / Q000302:isolation & purification*; D008088:Listeriosis / Q000453:epidemiology / Q000517:prevention & control / Q000662:veterinary*; D008321:Mammary Glands, Animal / Q000382:microbiology; D008892:Milk / Q000382:microbiology*; D015995:Prevalence