The US Centers for Disease Control and Prevention (CDC), the FDA, the USDA and state health officials are investigating a multistate outbreak of Shiga toxin-producing E. coli O157:H7 (STEC O157:H7) infection linked to rotisserie chicken salad sold in Costco Wholesale stores.
The outbreak has affected at least 19 people in seven states in the western USA. To date, five people have been hospitalised and two have developed haemolytic uremic syndrome (HUS), but no deaths have been reported.
Based on epidemiological evidence, investigators believe that rotisserie chicken salad made and sold in Costco Wholesale stores is the likely source of the outbreak. At least 14 of the people affected have reported buying or eating the product in the week before they became ill.
The investigation is now trying to identify what specific ingredient in the salad was the source of the contamination. Costco has removed all remaining rotisserie chicken salad from sale in its stores and stopped production until further notice.
More information about the investigation can be found on the CDC website here.