Salmonella Newport

Background: Salmonella enterica subsp. enterica serovar Newport (antigenic formula 6,8,20:e,h:1,2 ) is a serovar of the O:8 (C₂-C₃) serogroup. This serovar is one of top ten Salmonella serovars associated with human salmonellosis in North America. According to the National Veterinary Services Laboratories (NVSL), S. Newport became one of the top ten most frequently identified Salmonella serotypes from U.S. cattle from July 1998 through June 1999. Other findings also show that multidrug-resistant S. Newport has recently been spreading on an epidemic scale in both humans and animals throughout the United States. Based on the sequence analyses of the integrons, these isolates contained aadA, which confers resistance to streptomycin, or aadA and dhfr, which confer resistance to trimethoprim-sulfamethoxazole. The persistent strain of S. Newport (REPJJP01) has been identified and linked to travel to mexico, beef, and soft cheese.

Animal reservoir: Salmonella Newport was found in cattle, chicken, pig, horse, fish, dog, and goat.

Geographical distribution: Serovar Newport has been mainly found in North America, and Europe.

Human outbreaks:

Year	Location	Associated source	Number of cases
1995-1996	US	Alfalfa	>133
1999	US	Mangoes	79
2002	US: multistate	Tomatoes	510
2002	US: multistate	Ground beef	47
2004	US	Lettuce	97
2005-2006	US: multistate	Raw tomatoes	187
2006	US	Watermelon	20
2012	US: multistate	Cantaloupe	Salmonella Typhimurium sickened 228; Salmonella Newport sickened 33 people
2014	US: multistate	Cucumber	275
2016-2017	US: multistate	Ground beef	106
2017	US: multistate	Imported maradol papayas	4 (Salmonella Infantis was involved)
2018	US: KS	Tomatoes	14
2018	US: multistate	Frozen shredded coconut	27 (Salmonella I 4,[5],12:b:- was also involved)
2018	France & Scotland	Raw goats' milk cheese	France: 147 Scotland: 6
2018-2019	US: multistate	Ground beef produced by JBS Tolleson, Inc	403
2019	US: multistate	Frozen, ground tuna from JK Fish of Vietnam	13
2019	US: multistate	Tuna	15
2019	US: multistate	Pig ear treats for dogs	93 (Three serovars were involved: Infantis, London, and Newport)
2019	Sweden	Frozen crayfish from China	33
2020	US & Canada	Red onions	US: 1127 Canada: 515
2020	France	Raw or rare horse meat	20
2021	US	Infant formula	4 (3 of them were associated with Cronobacter sakazakii infections)
2021	US: multistate	Beef	75 (associated with REPJJP01)
2022	US: multistate	Beef	22 (associated with REPJJP01)

Border rejections: Multiple border rejections linked to this serovar have been reported and they are mainly associated with poultry or poultry products. Below are some examples:

Year	Exporting country	Importing country	Associated source	Product category
2025	Poland	Italy	Frozen duck¹	Poultry meat and poultry meat products
2025	Poland	Italy	Chicken and turkey kebab	Poultry meat and poultry meat products
2021	Brazil	Germany	Black pepper²	Herbs and spices
2020	Poland	Italy	Frozen marinated chicken inner fillets	Poultry meat and poultry meat products
2020	India	Germany	Dog chews (dried tripes)³	Feed materials

¹ Salmonella Enteritidis and Newport were found.

² Salmonella Javiana, Newport, Poona and Abaetetuba were found.

³ Salmonella Typhimurium and Newport were found.

Recalls: Multiple recalls linked to this serovar have been reported and they are associated with a variety of food commodities. Below are some examples:

Year	Location	Recalled food	Type
2023	Poland, Italy	Pekin duck fillet from Poland¹	Poultry meat and poultry meat products
2023	Germany	Spice mixtures (onion powder)	Herbs and spices
2022	Poland	Dried chicken feet	Pet food
2020	US: multistate	Onions²	Fruits and vegetables
2018	US: multistate	Raw beef products³	Meat and meat products (other than poultry)
2012	US: multistate	Cantaloupe⁴	Fruits and vegetables

¹ Salmonella Enteritidis and Newport were found.

² This recall was caused by a multistate outbreak described above. Thomson International, Inc. and other companies voluntarily issued recalls of their red, yellow, white, and sweet yellow onions.

³ This recall was caused by a multistate outbreak described above. JBS Tolleson, Inc., a Tolleson, Ariz. establishment, issued a recall of approximately 12,093,271 pounds of non-intact raw beef products.

⁴ This recall was caused by a multistate outbreak involving Salmonella Typhimurium and Newport as described above. Chamberlain Farms Produce, Inc. of Owensville, Indiana voluntarily issued a recall of cantaloupe grown on its farm.

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Salmonella Newport