title: Two Episodes of Listeriosis in Pregnancy and Newborns: Investigation, Problems and Considerations.
abstract: In January 2013, 3 strains ofListeria monocytogenesisolated 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 ofL. 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 ofL. monocytogenesserotype 1/2a. Therefore, no correlation has been demonstrated between the reported cases of listeriosis and the food analyzed.
authors: Institute for Experimental Veterinary Medicine of Latium and Tuscany , Rome.
authors: Selene
authors: S
authors: Marozzi
authors: Institute for Experimental Veterinary Medicine of Latium and Tuscany , Rome.
authors: Rita
authors: R
authors: Tolli
authors: Institute for Experimental Veterinary Medicine of Latium and Tuscany , Rome.
authors: Stefano
authors: S
authors: Bilei
authors: Local Health Unit Rome B , Italy.
authors: Daniela
authors: D
authors: Ricci
authors: Local Health Unit Rome B , Italy.
authors: Claudia
authors: C
authors: Rossi
authors: Institute for Experimental Veterinary Medicine of Latium and Tuscany , Rome.
authors: Teresa
authors: T
authors: Bossù
keywords: Investigation; Listeria monocytogenes; Listeriosis; PFGE