Volume 30, Number 4—April 2024
Dispatch
Uncommon Salmonella Infantis Variants with Incomplete Antigenic Formula in the Poultry Food Chain, Italy
Sara Petrin1
, Alessia Tiengo1, Alessandra Longo, Maddalena Furlan, Elisa Marafin, Paola Zavagnin, Massimiliano Orsini, Carmen Losasso2, and Lisa Barco2
, Alessia Tiengo1, Alessandra Longo, Maddalena Furlan, Elisa Marafin, Paola Zavagnin, Massimiliano Orsini, Carmen Losasso2, and Lisa Barco2
Table
Salmonella enterica serovar Infantis isolates in the poultry food chain, Italy, 2014‒2022*
| Isolate ID | Matrix | Source | Year | Location | Antigenic formula |
ST | ||
|---|---|---|---|---|---|---|---|---|
| Seroagglutination† | Molecular serotyping‡ | WGS§ | ||||||
| 21-153004-9 |
Meat |
Food |
2014 |
Veneto |
S. -: r: 1,5 |
S. Infantis (C1: r: 1,5) |
O-7:r:1,5 (Infantis) |
ST32 |
| 21-153004-10 |
Meat |
Food |
2014 |
Veneto |
S. -: r: 1,5 |
S. Infantis (C1: r: 1,5) |
O-30:r:1,5 (Gege) |
ST32 |
| 21-153004-11 |
Meat |
Food |
2014 |
Veneto |
S. -: r: 1,5 |
S. -: r: 1,5 |
O-?:r:1,5 |
ST32 |
| 21-153004-12 |
Sock sample |
Animal |
2014 |
Veneto |
S. -: r: 1,5 |
S. Infantis (C1: r: 1,5) |
O-?:r:1,5 |
ST32 |
| 21-153004-13 |
Sock sample |
Animal |
2016 |
Veneto |
S. -: r: 1,5 |
S. -: r: 1,5 |
O-?:r:1,5 |
ST32 |
| 21-153004-14 |
Meat |
Food |
2016 |
Veneto |
S. -: r: 1,5 |
S. -: r: 1,5 |
O-?:r:1,5 |
ST32 |
| 21-153004-1 |
Sock sample |
Animal |
2016 |
Lombardia |
S. -: r: 1,5 |
S. Infantis (C1: r: 1,5) |
O-30:r:1,5 (Gege) |
ST32 |
| 21-153014-1 |
Sock sample |
Animal |
2017 |
Lombardia |
S. -: r: 1,5 |
S. -: r: 1,5 |
O-?:r:1,5 |
ST32 |
| 21-153014-2 |
Sock sample |
Animal |
2017 |
Lombardia |
S. -: r: 1,5 |
S. -: r: 1,5 |
O-?:r:1,5 |
ST32 |
| 21-153014-3 |
Sock sample |
Animal |
2017 |
Molise |
S. -: r: 1,5 |
S. -: r: 1,5 |
O-?:r:1,5 |
ST32 |
| 21-153014-4 |
Sock sample |
Animal |
2017 |
Molise |
S. -: r: 1,5 |
S. -: r: 1,5 |
O-?:r:1,5 |
ST32 |
| 21-153014-14 |
Sock sample |
Animal |
2017 |
Molise |
S. -: r: 1,5 |
S. -: r: 1,5 |
O-?:r:1,5 |
ST32 |
| 21-153004-2 |
Meat |
Food |
2018 |
Veneto |
S. -: r: 1,5 |
S. -: r: 1,5 |
O-?:r:- |
ST32 |
| 21-153004-3 |
Carcass |
Animal |
2018 |
Veneto |
S. -: r: 1,5 |
S. Infantis (C1: r: 1,5) |
O-7:r:1,5 (Infantis) |
ST32 |
| 21-153014-5 |
Meat |
Animal |
2018 |
Veneto |
S. -: r: 1,5 |
S. -: r: 1,5 |
O-?:r:1,5 |
ST32 |
| 21-153014-7 |
Sock sample |
Animal |
2018 |
Veneto |
S. -: r: 1,5 |
S. -: r: 1,5 |
O-?:r:1,5 |
ST32 |
| 18-1157-6 |
Meat |
Food |
2018 |
Veneto |
S. -: r: 1,5 |
S. -: r: 1,5 |
O-?:r:1,5 |
ST32 |
| 21-153004-4 |
Sock sample |
Animal |
2019 |
Puglia |
S. -: r: 1,5 |
S. -: r: 1,5 |
O-?:r:1,5 |
ST32 |
| 21-153004-5 |
Meat |
Food |
2019 |
Veneto |
S. -: r: 1,5 |
S. -: r: 1,5 |
O-?:r:1,5 |
ST32 |
| 21-153004-6 |
Carcass |
Animal |
2019 |
Veneto |
S. -: r: 1,5 |
S. Infantis (C1: r: 1,5) |
O-7:r:1,5 (Infantis) |
ST32 |
| 21-153014-11 |
Sock sample |
Animal |
2020 |
Veneto |
S. -: r: 1,5 |
S. Infantis (C1: r: 1,5) |
O-30:r:1,5 (Gege) |
ST32 |
| 21-128165 |
Meat |
Food |
2021 |
Friuli Venezia Giulia |
S. -: r: 1,5 |
S. -: r: 1,5 |
O-?:r:1,5 |
ST32 |
| 21SAL/2851/1 |
Sock sample |
Animal |
2021 |
Lazio |
S. -: r: 1,5 |
S. -: r: 1,5 |
O-?:r:1,5 |
ST32 |
| 21-146541 |
Sock sample |
Animal |
2021 |
Lazio |
S. -: r: 1,5 |
S. -: r: 1,5 |
O-?:r:1,5 |
ST32 |
| 21-21379 |
Sock sample |
Animal |
2021 |
Veneto |
S. -: r: 1,5 |
S. -: r: 1,5 |
O-?:r:1,5 |
ST32 |
| 21-117758 |
Meat |
Food |
2021 |
Emilia Romagna |
S. -: r: 1,5 |
S. -: r: 1,5 |
O-?:r:1,5 |
ST32 |
| 21-117759 |
Sock sample |
Animal |
2021 |
Umbria |
S. -: r: 1,5 |
S. -: r: 1,5 |
O-?:r:1,5 |
ST32 |
| 22-16858-1 |
Meat |
Food |
2022 |
Sardegna |
S. -: r: 1,5 |
S. -: r: 1,5 |
O-?:r:- |
ST32 |
| 22-23625-9 |
Carcass |
Animal |
2022 |
Friuli Venezia Giulia |
S. -: r: 1,5 |
S. Infantis (C1: r: 1,5) |
O-30:r:1,5 (Gege) |
ST32 |
| 22-39728-9 |
Carcass |
Animal |
2022 |
Molise |
S. -: r: 1,5 |
S. -: r: 1,5 |
O-?:r:1,5 |
ST32 |
| 22-102991-7 |
Carcass |
Food |
2022 |
Veneto |
S. -: r: 1,5 |
S. Infantis (C1: r: 1,5) |
O-7:r:1,5 (Infantis) |
ST5275 |
| 22-16858-3 | Meat | Animal | 2022 | Sardegna | S. Infantis (6,7: r: 1,5) | S. Infantis (C1: r: 1,5) | O-7:r:1,5 (Infantis) | ST32 |
*Reference isolate showed complete antigenic formula (22-16858-3). ID, identification; ST, sequence type. †As determined by traditional seroagglutination (ISO 6579:3). ‡As determined by molecular serotyping (xMAP Salmonella serotyping assay [6]). §As determined by whole-genome sequencing.
1These first authors contributed equally to this article.
2These senior authors contributed equally to this article.
Page created: March 12, 2024
Page updated: March 20, 2024
Page reviewed: March 20, 2024
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