Yersiniosis is a bacterial infection primarily caused by Yersinia enterocolitica or Yersinia pseudotuberculosis. It commonly affects young children but can occur at any age, typically through consumption of contaminated food or water.
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*Yersinia enterocolitica* was first identified as a human pathogen in the mid-20th century, distinguishing it from the plague-causing *Yersinia pestis*. Its recognition helped clarify the cause of various gastrointestinal and systemic infections previously undiagnosed, increasing understanding of foodborne illnesses.
Yersiniosis primarily spreads through the fecal-oral route, often by consuming raw or undercooked pork, contaminated unpasteurized milk, or untreated water. Direct contact with infected animals, especially pigs, or their feces can also lead to transmission, as can person-to-person spread in household settings or childcare centers.
Contagious Period: Varies by disease
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Our AI-powered surveillance hasn't detected significant Yersiniosis activity in the past 30 days.
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Currently, Yersiniosis case counts are within baseline expectations globally. However, diseases can emerge rapidly, which is why continuous monitoring is critical.
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Global disease surveillance and guidelines from the World Health Organization
View WHO Resources →Disease information on Virus Watcher is reviewed by our Chief Epidemiologist, a former CDC lead analyst for FluSight forecasting. Outbreak data is aggregated from verified sources including BEACON, ProMED, WHO, CDC, and 50+ national health agencies. This information is for educational purposes and should not replace professional medical advice.
Last reviewed: 2026-06-03
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