Salmonella serovar distribution from non‐human sources in Italy; results from the IT‐Enter‐Vet network

Abstract

The study summarises the results obtained over the period 2002-2013 by the Italian IT-Enter-Vet network, aimed at collecting data on isolates from non-human sources. A total of 42,491 isolates were reported with a progressive decrease over the years. Typhimurium was the most frequent serovar up to 2011, but then, it was overtaken by 4,[5],12,:i:-, Derby Livingstone and Enteritidis alternated as the third most commonly isolated serovars. With regard to the sources of isolation, Typhimurium was distributed ubiquitously among the animal species. On the contrary, 4,[5],12,:i:- and Derby were strictly associated with pigs, whereas Livingstone Enteritidis and Infantis were clearly related to poultry. Intriguingly, when the frequency of serovar distribution along the food chain was considered, it was evident that Typhimurium and Derby tended to persist along the chain, as they were isolated even more frequently from foods than from animals. A similar distribution was found for Enteritidis and Hadar. Despite limitations related to non-mandatory participation of laboratories in the network, the data presented are valuable to obtain a picture of the evolution of from non-human sources over time in Italy.

Occurrence and distribution of Salmonella serovars in carcasses and foods in southern Italy: Eleven-year monitoring (2011–2021)

“…In the present study, a comparison of the years 2011–2015 and 2016–2021, an increasing significative trend in the occurrence of positive samples has been observed. Interestingly, the results of the present work showed opposite behaviors compared with those obtained in the years 2002–2013 by Mancin et al (2018) in which a decrease in the number of Salmonella isolation from non-human sources was observed in Italy. In Europe, to our knowledge, data on the occurrence of Salmonella in foods between 2011 and 2015 are sparse and have not been aggregated, making it difficult to compare the data present in literature with those of the present work.…”

Phenotypic and Genotypic Characterization of Virulence Factors and Susceptibility to Antibiotics in Salmonella Infantis Strains Isolated from Chicken Meat: First Findings in Chile

“…Only three strains of S. Enteritidis were isolated from the 361 samples of chicken meat, suggesting that the emergence of S. Infantis is replacing S. Enteritidis in the chicken-producing chain in Chile. The emergence of the S. Infantis serotype has been described in European countries and the United States [ 4 , 41 , 42 , 43 , 44 ]. In South America, it has also been described in Ecuador [ 45 ] and Peru [ 46 ].…”

Antimicrobial Susceptibility Testing for Salmonella Serovars Isolated from Food Samples: Five-Year Monitoring (2015–2019)

“…The different Salmonella serovars can be found in a wide range of foods such as poultry, fish, eggs, beef, and dairy products [9]. However, while S. Typhimurium shows an ubiquitous distribution, other serovars such as S. Derby, mainly isolated from pork and pork products, are strictly associated with a food category [10]. Resistance markers can easily be transferred among bacteria belonging to the same or different species; thus, the monitoring of AMR in serovars less clinically important is also crucial to tracking early changes in the microbial population [2].…”