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Cyclospora Outbreak Spreads Across 31 US States, Hundreds Infected As Source Remains Unknown
24htopnews | July 12, 2026 2:08 PM CST

A diarrhoea-causing Cyclospora outbreak has spread across 31 US states, with 843 confirmed cases reported between May 1 and July 9 and over 1,500 more under investigation. The source remains unknown, though contaminated food is suspected. At least 86 people have been hospitalised, prompting authorities to urge food safety precautions and vigilance as infections continue to rise.

A diarrhoea-causing parasite is spreading across the United States, with health officials reporting a sharp rise in infections across 31 states. The outbreak has sickened hundreds of people in recent weeks, while authorities say the actual number of cases is likely much higher as many infected people may not seek medical care or get tested.

The illness, known as cyclosporiasis, is caused by a microscopic parasite called Cyclospora. It spreads when people consume food or water contaminated with the parasite. The infection mainly causes frequent, watery and sometimes explosive diarrhoea. While no deaths have been reported so far, dozens of patients have required hospital treatment.

Cases Climb, Source Remains Unknown

According to the US Centers for Disease Control and Prevention (CDC), 843 confirmed cases of cyclosporiasis were reported between May 1 and July 9. However, the agency said it is aware of more than 1,500 additional cases that are still being analysed to confirm the illness. The CDC expects the number of confirmed infections to continue rising as more reports are verified, BBC reports.


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