Two episodes of listeriosis in pregnancy and newborns: investigation, problems and considerations


Submitted: 10 July 2014
Accepted: 31 January 2015
Published: 17 June 2015
Abstract Views: 1131
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In January 2013, 3 strains of Listeria monocytogenes isolated from one mother and her newborn and a second infant arrived at the Institute for Experimental Veterinary Medicine of Latium and Tuscany. At the same time the Local Health Unit Rome B sampled at retail a smoked salmon that was suspected to be involved in the transmission of the disease. The sample was tested for the presence of L. monocytogenes (UNI EN ISO 11290: 2005 part 1 and 2). Laboratory investigations have shown that all 3 strains isolated from patients belonged to serotype 4b of two different clusters (cluster B for the isolates from mother and child and cluster A to that obtained from another baby), so no epidemiological link was demonstrated in the human cases. The tests conducted on smoked salmon have shown the presence of L. monocytogenes serotype 1/2a. Therefore, no correlation has been demonstrated between the reported cases of listeriosis and the food analyzed.

1.
Marozzi S, Tolli R, Bilei S, Ricci D, Rossi C, Bossù T. Two episodes of listeriosis in pregnancy and newborns: investigation, problems and considerations. Ital J Food Safety [Internet]. 2015 Jun. 17 [cited 2024 Mar. 29];4(2). Available from: https://www.pagepressjournals.org/ijfs/article/view/ijfs.2015.4567

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