A contaminated meat slicer was behind 4 Listeria infections at an Italian hospital in late 2020, in response to a research.
The researchers mentioned it was the primary report of a listeriosis outbreak brought on by sequence kind (ST) 451 in Italy.
The infections affected one immunosuppressed and three most cancers sufferers in several items of a hospital within the metropolis of Latina, Lazio, in central Italy in September and October 2020.
A 53-year-old man died, a 75-year-old man and a 55-year-old girl have been discharged residence and a 39-year-old man was referred to palliative care, in response to the research printed within the journal. Pathogens.
Two sufferers ate solely hospital meals, whereas one other mentioned additionally they ate Parmesan cheese introduced from residence as soon as and saved in an insulated bag for a couple of days.
From the menus accessible from affected sufferers, it was not doable to establish a meals product because the widespread direct supply of an infection.
Outbreak pressure discovered within the hospital kitchen
The researchers mentioned the findings assist the speculation of a secondary contamination occasion involving a meals handled with the slicer. Nevertheless, the unique supply of kitchen contamination from this pressure was not recognized.
The one optimistic environmental pattern for Listeria monocytogenes was a kitchen slicer that was devoted to reducing uncooked meat and, after a disinfection step, cooked meat corresponding to roasts.
After the meat slicer was recognized as a supply of contaminants, a short lived suspension was applied and an outdoor service was entrusted to provide packaged meals in order that the hospital kitchen might be disinfected. After the absence of Listeria monocytogenes, after 5 days the kitchen middle was reopened.
The epidemiological investigation concerned conventional microbiological methodology and complete genome sequencing.
The scientists analyzed remoted pressure sequence information from seven listeriosis circumstances handled on the identical hospital since 2017, however solely the final 4 circumstances have been associated.
One other 10 circumstances of Listeria monocytogenes ST451 have been present in a database of sequenced medical isolates of Listeria monocytogenes collected in Italy lately, one every from Lazio, Tuscany, Umbria, 4 from Lombardy, and three from Piedmont.
The researchers mentioned well being professionals ought to advise folks at greater danger for extreme listeriosis to keep away from meals which can be most definitely to be contaminated, corresponding to uncooked or flippantly cooked ready-to-eat merchandise. Hospitals and healthcare services also needs to pay attention to the danger of Listeria monocytogenes contamination from foodservice gear and meals processing crops, the researchers mentioned.
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