Thursday, January 28, 2016

CDC Update - Salmonella Cases Associated with Cucumbers Continue to Trickle In

 Since CDC's last report in November, 50 more people from 16 states have been reported becoming ill with a specific strain of Salmonella associated with cucumbers from one distributor in California.  The current total is 888 cases in 39 states. 

While it would be expected that this recall would have been finished, the reason for continued cases has not been determined.  One reason my be is that there has been cross contamination within the supply chain.
  
 Graph showing People infected with the outbreak strains of Salmonella Poona, by date of illness onset - as of January 21, 2016 
 
  
CDC Outbreak Update
Multistate Outbreak of Salmonella Poona Infections Linked to Imported Cucumbers
Posted January 26, 2016 2:30 PM ET
  
At A Glance

What's New?
  • Since the last update on November 19, 2015, 50 more ill people have been reported from 16 states.
  • Two additional deaths were reported from California, bringing the total number of deaths to 6. According to the California Department of Public Health, Salmonella infection was not considered to be a contributing factor in either of these 2 additional deaths.
  • Tennessee was added to the list of states with ill people, bringing the total number of states to 39.
  • The number of reported illnesses has declined substantially since the peak of illnesses in August and September; however, it has not returned to the number of reported illnesses that we would expect to see (about 1 every month during this time of year). The investigation into the source of these recent illnesses is ongoing.
Highlights
  • CDC, multiple states, and the U.S. Food and Drug Administration (FDA) are investigating a multistate outbreak of Salmonella Poona infections.
  • Epidemiologic, laboratory, and traceback investigations identified cucumbers imported from Mexico and distributed by Andrew & Williamson Fresh Produce as a likely source of the infections in this outbreak.
  • Two recalls(http://www.cdc.gov/salmonella/poona-09-15/advice.html) of cucumbers that may be contaminated with Salmonella were announced in September 2015 as a result of this investigation: Andrew & Williamson Fresh Produce and Custom Produce Sales.
  • 888 people infected with the outbreak strains of Salmonella Poona have been reported from 39 states, an increase of 50 cases since the last update on November 19, 2015.
  • 191 ill people have been hospitalized, and six deaths have been reported from Arizona (1), California (3), Oklahoma (1), and Texas (1). Salmonella infection was not considered to be a contributing factor in two of the three deaths in California.
  • Whole genome sequencing(http://www.cdc.gov/amd) (WGS) showed that the strains of Salmonella Poona from ill persons and from contaminated cucumbers distributed by Andrew & Williamson Fresh Produce are closely related genetically.
  • WGS of isolates from people who became ill in October and November are also closely related genetically to isolates from people who became ill during the peak of the outbreak and to isolates from contaminated cucumbers.
  • The source of contamination for the cucumbers distributed by Andrew & Williamson Fresh Produce has not been identified.
  • The number of reported illnesses has declined substantially since the peak of illnesses in August and September; however, it has not returned to the number of reported illnesses that we would expect to see (about 1 every month this time of year). The investigation into the source of these recent illnesses is ongoing.
  • Whole genome sequencing results from recent illnesses suggest it is likely that there is a common source of ongoing contamination.
  • Interviews of persons who became ill after the end of September have not identified an additional food item linked to illness.
  • Investigations are under way to determine if cross-contamination within the distribution chain for the recalled cucumbers could explain recent illnesses.
  • While investigators work to learn more about the source of the recently reported illnesses, consumers, retailers, and restaurants can do the following:
  • Consumers who purchased recalled cucumbers should wash and sanitize(http://www.cdc.gov/salmonella/poona-09-15/advice.html) drawers or shelves in refrigerators where cucumbers were stored.
  • Consumers should wash reusable grocery bags often.
  • Restaurants and retailers that received recalled cucumbers should wash and sanitize(http://www.cdc.gov/salmonella/poona-09-15/advice.html) any crates or other containers where the cucumbers were held or sold.
  • This investigation is ongoing. CDC will provide updates when more information is available.

 

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