As of 13 August the outbreak had affected at least 134 people in Washington since April 2015, with 16 requiring hospital treatment. Genetic fingerprinting has identified five different outbreak strains of Salmonella I 4,,12:i-. One of the strains has been found to be multidrug-resistant and all are reported to be rare in Washington.
Several clusters of cases associated with whole pig roast events were identified. Epidemiological, microbiological and traceback evidence has now identified pork products produced by Kapowsin Meats of Graham, Washington, as the likely source of the outbreak.
In response to the outbreak Kapowsin Meats is recalling approximately 116,000 pounds of whole hogs for barbeque that could be contaminated with Salmonella. The hogs were produced between 18 April and 27 July and shipped to various locations in Washington and Alaska. There are concerns that some may still be stored in consumers’ freezers.
More information about the outbreak investigation can be found here.