A contaminated meat slicer was behind 4 Listeria infections in an Italian hospital in late 2020, in line with a research.
Researchers stated it was the primary report of an outbreak of listeriosis attributable to sequence sort (ST) 451 in Italy.
Infections concerned one immunocompromised and three most cancers sufferers in numerous models of a hospital within the metropolis of Latina, Lazio, within the middle of Italy in September and October 2020.
A 53-year-old man died, a 75-year-old man and 55-year-old girl had been discharged to go house and a 39-year-old man was referred to hospice care, in line with the research printed within the journal Pathogens.
Two sufferers consumed solely hospital meals, whereas one other stated she additionally ate parmesan cheese introduced from house as soon as and saved in a thermic bag for a number of days.
From the obtainable menus of affected sufferers, it was not doable to determine one meals product because the frequent direct supply of an infection.
Outbreak pressure present in hospital kitchen
Researchers stated findings help the speculation of a secondary contamination occasion involving a meals handled with the slicer. Nonetheless, the unique supply of the kitchen contamination by this pressure was not recognized.
The one environmental pattern constructive for Listeria monocytogenes was a kitchen slicer that was devoted to slicing uncooked meat and, after a sanitizing step, cooked meat resembling roasts.
After identification of the meat slicer because the contaminant supply, a brief suspension was put in place and exterior service relied on for the availability of packaged meals so the hospital kitchen might be sanitized. Following the absence of Listeria monocytogenes, after 5 days the cooking middle was reopened.
The epidemiological investigation concerned conventional microbiological methodology and complete genome sequencing.
Scientists analyzed the sequence knowledge of strains remoted from seven listeriosis instances handled in the identical hospital since 2017 however solely the most recent 4 instances had been associated.
An additional 10 instances of Listeria monocytogenes ST451 had been present in a database of sequenced Listeria monocytogenes medical isolates collected in Italy lately with one every from Lazio, Tuscany, Umbria, 4 from Lombardy, and three from Piedmont.
Researchers stated healthcare professionals ought to advise folks at elevated threat for extreme listeriosis to keep away from meals that could be extra prone to be contaminated, resembling calmly cooked or uncooked ready-to-eat merchandise. Hospitals and healthcare services must also pay attention to the chance of Listeria monocytogenes contamination of meals service gear and meals processing vegetation, stated researchers.
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