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CDC is collaborating with the U.S. Department of Agriculture's Animal and Plant Health Inspection Service (USDA-APHIS) and state health departments to investigate an outbreak of human Salmonella Typhimurium infections with an indistinguishable pulsed-field gel electrophoresis pattern linked to contact with pet hedgehogs. This outbreak strain is historically rare, with only one to two cases reported via PulseNet (the national molecular subtyping network for foodborne disease surveillance) annually since 2002. Since 2011, an increasing number of cases have been detected. PulseNet identified 14 human isolates in 2011, 18 in 2012, and two in 2013.
Since January 2012, a total of 20 persons infected with the outbreak strain of Salmonella Typhimurium have been reported from eight states: Alabama (one), Illinois (one), Indiana (one), Michigan (three), Minnesota (three), Ohio (three), Oregon (one), and Washington (seven). Illness onset dates ranged from December 26, 2011, to December 31, 2012. The median patient age was 13 years (range: <1-91 years); 55% of patients were female. Four patients were hospitalized. One death associated with Salmonella infection has been reported. Fourteen out of 15 patients (or their proxies) reported direct or indirect contact between the patient and a hedgehog during the week before illness onset. The hedgehogs were purchased from various hedgehog breeders, many of whom were USDA-APHIS licensed, in several states. CDC, USDA-APHIS, and state health departments currently are collaborating to conduct a traceback investigation of hedgehogs purchased from USDA-APHIS licensed breeders by members of the households of ill persons.
Notes from the Field: Multistate Outbreak of Human Salmonella Typhimurium Infections Linked to Contact with Pet Hedgehogs—United States, 2011-2013. JAMA. 2013;309(14):1456. doi:10.1001/jama.2013.1525
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