ArticleActa veterinaria Scandinavica2026
Listeria monocytogenes isolated from a human case of invasive listeriosis survived more than 25 years in a blood culture bottle.
Article in Acta veterinaria Scandinavica, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The aim of the present study was to determine whether L. monocytogenes bacteria from an invasive case of listeriosis cultured in a BacT/ALERT FA bottle in 1999 have survived, and if so, whether their pulsed-field gel electrophoresis (PFGE) profiles have changed. In 2024, after more than 25 years in a refrigerator, L. monocytogenes was isolated in pure culture from the BacT/ALERT FA bottle. All 100 selected isolates showed the same by PFGE profile with the restriction enzyme Asc I as the L. monocytogenes isolates did in 1999. L. monocytogenes can apparently survive for a long time in a nutrient-poor environment, and this must be taken into account by the food industry. Persistence in clinical samples has rarely been reported; however, several authors report persistence of L. monocytogenes in the food industry, with bacteria ending up in final products.
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