Outbreak of Multidrug-Resistant Salmonella Infections Linked to Contact with Pig Ear Dog Treats

  04 July 2019

As of July 2, 2019, a total of 45 people infected with the outbreak strain of Salmonella– have been reported from 13 states. A list of the states and the number of cases in each can be found on the Map of Reported Cases page.

Illnesses started on dates ranging from November 18, 2018, to June 13, 2019. Ill people range in age from less than 1 year to 81 years, with a median age of 23. Half (50%) of ill people are female. Of 39 ill people with information available, 12 (31%) have been hospitalized. No deaths have been reported.

Illnesses might not yet be reported due to the time it takes between when a person becomes ill and when the illness is reported. This takes an average of 2 to 4 weeks. Please see the Timeline for Reporting Cases of Salmonella Infection for more details.

Whole genome sequencing analysis of Salmonella isolates from 30 ill people predicted antibiotic resistance or decreased susceptibility to ampicillin, ciprofloxacin, gentamicin, nalidixic acid, streptomycin, sulfisoxazole, tetracycline, and trimethoprim-sulfamethoxazole. Testing of one clinical isolate using standard antibiotic susceptibility testing methods by CDC’s National Antimicrobial Resistance Monitoring System (NARMS) provided comparable results. These antibiotic-resistant infections may be difficult to treat with commonly recommended antibiotics, and may require a different antibiotic choice.

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