Causes behind a human cheese-borne outbreak of gastrointestinal listeriosis.
In a previous paper, we reported an outbreak of gastrointestinal listeriosis due to consumption of fresh cheese made from raw milk and manufactured on a summer farm. The aim of the present study was to investigate why the cheese harbored Listeria monocytogenes. To our knowledge, this is the first documented outbreak of listeriosis caused by raw milk cheese where the human epidemic strain has been cultured from a dairy animal, whose milk has been used for cheese production. The conditions on a summer farm can hardly fulfil the requirements for hygienic and strictly controlled conditions necessary for safe processing of fresh cheese.
Department of Food Hygiene, Faculty of Veterinary Medicine, SLU, Uppsala, Sweden. Wilhelm.Tham@lmhyg.slu.se
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Danielsson-Tham
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Eriksson
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Helmersson
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Leffler
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Lüdtke
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Steen
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Sørgjerd
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Tham
D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000382:microbiology / Q000635:transmission; D002611:Cheese / Q000382:microbiology*; D003257:Consumer Product Safety; D004196:Disease Outbreaks; D005506:Food Contamination; D005516:Food Microbiology; D015511:Goat Diseases / Q000382:microbiology / Q000635:transmission; D006041:Goats; D006801:Humans; D008089:Listeria monocytogenes / Q000302:isolation & purification* / Q000472:pathogenicity; D008088:Listeriosis / Q000453:epidemiology / Q000209:etiology*; D008892:Milk / Q000382:microbiology