You are viewing an old version of this page. View the current version.

Compare with Current View Page History

« Previous Version 3 Next »

Background: Salmonella enterica subsp. enterica serovar Newport (antigenic formula 6,7:y:e,n,x) is a serovar of the O:7 (C1) serogroup. It has been isolated from. Multidrug-resistant Salmonella serotype Newport has recently been spreading on an epidemic scale in both animals and humans throughout the United States Sequence analyses of the integrons showed that they contained aadA, which confers resistance to streptomycin, or aadA and dhfr, which confer resistance to trimethoprim-sulfamethoxazole.  The National Veterinary Services Laboratories (NVSL) listed S. newport as one of the top ten most frequently identified Salmonella serotypes from U.S. cattle from July 1998 through June 1999.Salmonella Newport, as one of top ten Salmonella serovars associated with human salmonellosis in North America,

Animal reservoir: Salmonella Newport was found in cattle, chicken

Geographical distribution: Serovar Newport has been found in 

Outbreaks: Outbreaks have been associated with S. Newport. 

YearLocationAssociated SourceNumber of Cases




1995-1996USAlfalfa >133
1999USMangoes79
2002US: Multi-stateTomatoes510
2002US: Multi-stateGround beef47
2004USLettuce97
2005-2006US: Multi-stateRaw tomatoes187
2006USWatermelon20
2016-2017US: Multi-stateGround beef106
2017US: Multi-stateImported maradol papayas4
2018US: KSTomatoes14
2018-2019US: Multi-stateGround beef produced by JBS Tolleson, Inc403
2019US: Multi-stateFrozen, ground tuna from JK Fish of Vietnam13
2019US: Multi-stateTuna15
2019US: Multi-statePig ear treats for dogs93 (Three serovars were involved: Infantis, London, and Newport)
2019Sweden Frozen crayfish from China33
2020US & CanadaRed onions

US: 1127

Canada: 515

2020France Raw or rare horse meat20
2021USInfant formula4 (3 of them were associated with Cronobacter sakazakii infections)


Relevant links and references:

  1. https://www.fda.gov/food/outbreaks-foodborne-illness/factors-potentially-contributing-contamination-red-onions-implicated-summer-2020-outbreak-salmonella
  2. https://www.cdc.gov/salmonella/general/technical/newport.html
  3. https://www.cdc.gov/salmonella/newport-07-20/index.html
  4. https://www.fda.gov/food/outbreaks-foodborne-illness/outbreak-investigation-salmonella-newport-frozen-ground-tuna-april-2019
  5. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC309039/
  6. https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5125a1.htm
  7. https://jamanetwork.com/journals/jama/article-abstract/193406
  8. https://www.addl.purdue.edu/newsletters/2004/summer/salmnewp.htm
  9. https://pubmed.ncbi.nlm.nih.gov/36382397/
  10. https://www.cdc.gov/mmwr/volumes/67/wr/mm6715a2.htm#F1_down
  11. https://www.cdc.gov/salmonella/newport-10-18/index.html
  12. https://www.aphis.usda.gov/aphis/ourfocus/animalhealth/animal-and-animal-product-import-information/organisms-vectors/livestock-poultry-pathogens
  13. https://www.fsis.usda.gov/sites/default/files/media_file/2022-06/Newport_AAR_20220519_cln.pdf
  14. https://www.canada.ca/en/public-health/services/public-health-notices/2020/outbreak-salmonella-infections-under-investigation.html
  15. https://www.foodsafetynews.com/tag/salmonella-newport/
  16. https://www.sciencedirect.com/science/article/abs/pii/S016816051830638X
  17. https://www.sciencedirect.com/science/article/pii/S0362028X22086392#bb0210
  18. https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5635a3.htm
  19. https://www.liebertpub.com/doi/pdf/10.1089/fpd.2008.0232
  20. https://www.cdc.gov/salmonella/newport-09-17/index.html
  • No labels