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Background: Salmonella enterica subsp. enterica serovar Napoli (antigenic formula 1,9,12:l,z₁₃:e,n,x) is a serovar of the O:9 (D₁) serogroup. In 2006, serovar Napoli ranked 22nd in the Enter-net Salmonella database, accounting for 295 cases (0.28%) out of 105,635 reported across 29 European countries. Between 2000 and 2006, Europe saw a 140% rise in serovar Napoli infections, with over 87% of cases originating in France, Italy, and Switzerland. This serovar has been an emerging serovar in these three countries, particularly in Italy, where it is the fourth most frequent Salmonella serovar, responsible for 2-4% of human infections. Additionally, from 2010 to 2014, serovar Napoli was the leading cause of invasive salmonellosis, affecting 40 out of 687 cases—a cases in Italy—a notably higher invasive rate compared to other nontyphoidal serotypes. 

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Recalls: There have been no recent recalls linked to this serovar. 

Relevant links:

1. https://pubmed.ncbi.nlm.nih.gov/19534593/
2. https://www.escaide.eu/sites/default/files/documents/ESCAIDE-2012-abstract-book.pdf
3. https://www.scielosp.org/article/aiss/2014.v50n1/96-98/
4. https://www.liebertpub.com/doi/abs/10.1089/fpd.2016.2206

1. https://pmc.ncbi.nlm.nih.gov/articles/PMC8276318/#:~:text=So%20far%2C%20it%20has%20been,undoubted%20benefit%20at%20community%20level.
2. https://link.springer.com/article/10.1007/s10393-023-01625-y
3. https://www.scielosp.org/article/aiss/2014.v50n1/96-98/https://efsa.onlinelibrary.wiley.com/doi/pdf/10.2903/sp.efsa.2022.EN-7687
4. https://www.foodsafetynews.com/2023/12/salmonella-outbreak-over-in-norway-but-source-not-found/
5. https://www.liebertpub.com/doi/full/10.1089/fpd.2015.2091https://www.escaide.eu/sites/default/files/documents/ESCAIDE-2012-abstract-book.pdf
6. https://pubmed.ncbi.nlm.nih.gov/6131266/
7. https://pmc.ncbi.nlm.nih.gov/articles/PMC11718894/