US Cyclosporiasis outbreak claims two lives amid record cases

The United States is grappling with its largest recorded outbreak of Cyclosporiasis, an intestinal infection caused by a parasite, which has now resulted in two confirmed deaths. Both fatalities occurred in Michigan, the state most severely impacted by the widespread illness.

State health authorities indicated that the deceased patients had significant pre-existing medical conditions that were likely exacerbated by the infection and its associated severe dehydration. As of July 28, the US Centers for Disease Control and Prevention (CDC) reported 6,707 laboratory-confirmed cases across the country, with an additional 11,500 suspected cases awaiting confirmation. Michigan alone has documented 11,234 cases, including 193 hospitalizations.

Cyclosporiasis is transmitted through the consumption of food or water contaminated with human feces containing the parasite Cyclospora cayetanensis. While typically not life-threatening, the infection can lead to severe illness, characterized by watery diarrhea, nausea, stomach cramps, fatigue, and dehydration. Some infected individuals may remain asymptomatic, and untreated infections can persist for extended periods, with symptoms fluctuating over time.

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Cyclospora is harder to track than many foodborne pathogens because, unlike bacteria, it cannot be grown in the lab or easily genome-mapped to trace an outbreak.

The US Food and Drug Administration (FDA) has identified iceberg lettuce from Taylor Farms' operations in central Mexico, served at Taco Bell, as a potential source for part of the outbreak. This lettuce has since been recalled. However, investigators suspect other food sources may also be involved, and epidemiologists are exploring the possibility of multiple simultaneous outbreaks.

Public health experts have voiced concerns that recent reductions in staffing and funding for US health agencies might be hindering efforts to investigate and contain the outbreak. Dr. Paul Bollyky, an infectious disease expert, noted that Cyclospora is challenging to track due to difficulties in laboratory cultivation and genome mapping. He warned that diminished public health resources could complicate outbreak investigations and control, suggesting the scale of this event raises broader questions about the safety of the U.S. food supply.

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Anytime you have over 10,000 people infected with a foodborne pathogen, you do have to wonder whether this is a canary in the coal mine.