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Created by
user-9b773, last updated by Brad Yang on Mar 10, 2025
2 minute read
Background: Salmonella enterica subsp. enterica serovar Derby (antigenic formula 1,4,[5],12:f,g:[1,2]) is a serovar of the O:4 (B) serogroup. This serovar was fist isolated from humans who were infected after eating contaminated pork pies in the UK in 1923. It is one of the dominant Salmonella serovars isolated from slaughter pigs in Europe, and ranks #4 in the most frequently isolated Salmonella serovars from clinical non-human sources in the United States.
NCBI PD link for serovar Derby: https://www.ncbi.nlm.nih.gov/pathogens/isolates/#(taxgroup_name:%22Salmonella%20enterica%22)%20AND%20computed_types:(%22serotype=Derby%22)
Genetic characteristics:
Animal reservoir: The most common reservoir for serovar Derby is swine. However, it has also been reported in poultry, eggs and dairy products.
Geographical distribution: Serovar Derby has been reported worldwide such as the US, Europe, and China.
Human outbreaks: Multiple outbreaks linked to serovar Derby have been reported; in many of these outbreaks, the associated food was pork products. Below are examples.
| Year | Location | Associated source | Number of cases |
|---|---|---|---|
| 2013-2014 | Germany | Raw fermented meat paste | 145 |
| 2011 | Spain | Dried pork sausage | <49 |
| 1973 | Trinidad | Powdered infant formula | ~3000 |
| 1963 | US: multistate | Raw or under-cooked eggs | ~822 (incl. secondary) |
Border rejections: Multiple border rejections associated with serovar Derby have been reported. Here we selected two as examples.
Year | Exporting country | Importing country | Associated source | Product category |
| 2022 | Poland | Italy | Frozen turkey meat | Poultry meat and poultry meat products |
| 2020 | Spain | Italy | Frozen minced turkey breast1 | Poultry meat and poultry meat products |
1 Salmonella Derby and Bovismorbificans were both found.
Recalls: Multiple recalls linked to serovar Derby have been reported. Examples are below.
| Year | Location | Recalled product | Type |
|---|---|---|---|
| 2024 | Finland | Frozen pork cheek from Poland via Estonia | Meat and meat products (other than poultry) |
| 2022 | Czech Republic | Frozen beef pet food from Germany1 | Pet food |
| 2021 | US | Salami stick2 | Meat and meat products (other than poultry) |
1 Salmonella Infantis, Derby, Reading and Enterobacteriaceae were found.
2 Euro Foods has recalled around 119,091 pounds of Citterio brand Premium Italian-Style Salame Sticks products.
Relevant links:
- https://www.jstor.org/stable/3859161
- https://www.efsa.europa.eu/en/efsajournal/pub/rn-206
- https://web.archive.org/web/20160514081524/http://www.cdc.gov/ncezid/dfwed/pdfs/salmonella-annual-report-2012-508c.pdf
- https://pmc.ncbi.nlm.nih.gov/articles/PMC10715017/
- https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2022.1065672/full
- https://www.sciencedirect.com/science/article/pii/S0740002016309194
- https://www.sciencedirect.com/science/article/abs/pii/S0213005X15004528?np=y
- https://pubmed.ncbi.nlm.nih.gov/18171262/
- https://jamanetwork.com/journals/jama/article-abstract/1161055
- https://webgate.ec.europa.eu/rasff-window/screen/notification/552961
- https://webgate.ec.europa.eu/rasff-window/screen/notification/420173
- https://webgate.ec.europa.eu/rasff-window/screen/notification/717474
- https://webgate.ec.europa.eu/rasff-window/screen/notification/545199
- https://archive.cdc.gov/www_cdc_gov/salmonella/i45-10-21/details.html#:~:text=California%20officials%20found%20Salmonella%20in,to%20samples%20from%20sick%20people.