Salmonella Derby

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. S. Derby is a common serotype in pigs and pork products in Europe, raw pork in China (particularly Luohe, in Henan province). It is one of the dominant Salmonella serovars isolated from slaughter pigs in Europe (EFSA, 2008), and ranks #4 in the most frequently isolated Salmonella serovars from clinical non-human sources in the United States.

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: S. Derby has been reported in the US, Europe, and China.

Outbreaks: Several outbreaks linked to S. Derby have been reported; in many of these outbreaks, the associated food was pork products.

Year	Location	Associated source	Number of cases

2011	Spain	Dried pork sausage	<49

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)

¹Salmonella 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.

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Salmonella Derby