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: Multiple human outbreaks linked to serovar Newport have been reported with the majority occurring in the US. Below are examples. 

¹ A REP strain (REPJJP01) was identified as the outbreak strain.

² A total of four cases were reported [Cronobacter sakazakii (3) and Salmonella Newport (1)]. 

³ A REP strain (REPJJP01) was identified as the outbreak strain.

⁴ US reported 1,127 cases, while Canada reported 515 cases.

⁵ Salmonella I 4,[5],12:i:-, Cerro, Derby, Infantis, London, Newport, and Rissen were involved in this outbreak. The case number (i.e., 154) is not specific to Salmonella Newport infections. 

⁶ The infections included Salmonella I 4,[5],12:b:- (26 cases) and Salmonella Newport (1 case).

⁷ France reported 147 cases, while Scotland reported 6 cases.

⁸ The infections included Salmonella Newport (3 cases) and Salmonella Infantis (1 case).

⁹ The infections included Salmonella Typhimurium (228 cases) and Salmonella Newport (33 cases).

¹⁰ The infections included Salmonella Newport (197 cases), Typhimurium (190 cases), and Braenderup (72 cases). 

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:

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:

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. 

Relevant links:

1. https://pmc.ncbi.nlm.nih.gov/articles/PMC10651324/#:~:text=Outbreak%20Investigations&text=A%20second%20multistate%20outbreak%20that,ground%20beef%20from%20a%20patient.
2. https://dpbh.nv.gov/uploadedFiles/dpbhnvgov/content/Resources/Update%20TB_FDA%20Recall%20on%20Infant%20Formula%20030122.pdf
3. https://www.fda.gov/food/outbreaks-foodborne-illness/outbreak-investigation-salmonella-newport-red-onions-july-2020
4. https://pmc.ncbi.nlm.nih.gov/articles/PMC11450499/#:~:text=In%20July%202020%2C%20a%20Salmonella,2020%20to%2029%20August%202020
5. https://www.foodsafetynews.com/2020/10/salmonella-in-horse-meat-linked-to-two-deaths-in-france/
6. https://archive.cdc.gov/www_cdc_gov/salmonella/newport-04-19/index.html
7. https://www.fda.gov/animal-veterinary/outbreaks-and-advisories/fda-investigates-contaminated-pig-ear-pet-treats-connected-human-salmonella-infections
8. https://pmc.ncbi.nlm.nih.gov/articles/PMC9164673/#:~:text=In%20autumn%202019%2C%20the%20Public,source%20and%20prevent%20further%20cases
9. https://archive.cdc.gov/#/details?url=https://www.cdc.gov/salmonella/newport-10-18/index.html
10. https://www.kdhe.ks.gov/ArchiveCenter/ViewFile/Item/2781
11. https://archive.cdc.gov/www_cdc_gov/salmonella/coconut-01-18/index.html
12. https://www.cambridge.org/core/journals/epidemiology-and-infection/article/outbreak-of-salmonella-newport-associated-with-internationally-distributed-raw-goats-milk-cheese-france-2018/528E4E70FB25CDBB293627227740E39D
13. https://outbreakdatabase.com/outbreaks/2017-multistate-outbreak-of-salmonella-newport-and-salmonella-infantis-linked-to-maradol-papayas
14. https://www.fsis.usda.gov/sites/default/files/media_file/documents/Newport_AAR_2022072722_cln.pdf
15. https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6406a3.htm#:~:text=In%20August%202014%2C%20PulseNet%2C%20the,pattern%20
16. https://archive.cdc.gov/www_cdc_gov/salmonella/typhimurium-cantaloupe-08-12/index.html
17. https://outbreakdatabase.com/outbreaks/2006-outbreak-of-salmonella-newport-at-a-restaurant-linked-to-watermelon-new-york
18. https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5635a3.htm
19. https://www.cidrap.umn.edu/foodborne-disease/uk-salmonella-outbreak-linked-lettuce
20. https://pmc.ncbi.nlm.nih.gov/articles/PMC2870807/#:~:text=Salmonella%20Newport%20causes%20more%20than,510%20patients%20in%2026%20states

1. https://webgate.ec.europa.eu/rasff-window/screen/notification/745388
2. https://webgate.ec.europa.eu/rasff-window/screen/notification/737443
3. https://webgate.ec.europa.eu/rasff-window/screen/notification/522132
4. https://webgate.ec.europa.eu/rasff-window/screen/notification/425465
5. https://webgate.ec.europa.eu/rasff-window/screen/notification/423186
6. https://webgate.ec.europa.eu/rasff-window/screen/notification/625006
7. https://webgate.ec.europa.eu/rasff-window/screen/notification/608601
8. https://webgate.ec.europa.eu/rasff-window/screen/notification/555203
9. https://archive.cdc.gov/www_cdc_gov/salmonella/newport-07-20/updates.html
10. https://www.fsis.usda.gov/recalls-alerts/jbs-tolleson-inc--recalls-raw-beef-products-due-possible-salmonella-newport
11. https://outbreakdatabase.com/outbreaks/2012-multistate-outbreak-of-salmonella-newport-linked-to-cantaloupe