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Friday, 3/7/2026 | 17:13 GMT+7

Mystery of a parasite spreading diarrhea in 17 U.S. states

U.S. federal health officials are tracking the source of a microscopic parasite causing prolonged intestinal illness, affecting hundreds of people.

As of mid-June, the U.S. Centers for Disease Control and Prevention (CDC) reported 145 Cyclospora infections across 17 states. All cases were domestically acquired, Fox News reported on 2/7. Cyclospora, a microscopic, single-celled parasite, is the culprit behind these intestinal infections.

According to the CDC, typical symptoms include watery diarrhea that often progresses to severe, acute episodes, lasting weeks or even months if not treated promptly. Other accompanying symptoms are: severe abdominal cramps, bloating, nausea, exhaustion, and significant weight loss.

The official season for this parasite runs annually from 1/5 to 31/8. This warm weather period historically coincides with a surge in infections, the CDC notes.

According to the U.S. Centers for Disease Control and Prevention (CDC), this summer the country recorded 145 people nationwide infected with a parasite causing diarrhea. *Photo: CDC*

Cases are currently scattered across many regions, stretching from Texas to Alaska. New York is the most affected state, reporting 31 to 80 cases. Texas and Illinois follow, each with 11 to 30 cases.

While this infection can sometimes resolve on its own, most cases require antibiotic treatment. CDC data shows that among the 145 confirmed infections, 20 patients required hospitalization. No fatalities have been reported to date. Patient ages range from 5 to 86, with a median age of 42, and females accounting for 61% of total infections.

The CDC is collaborating with the Food and Drug Administration (FDA) and local health agencies to actively investigate several interstate clusters of illness. However, health officials have yet to pinpoint the cause behind this wave of infections. "Currently, there is no evidence to suggest that all cases are linked to a single food source or a single, widespread Cyclospora outbreak", the U.S. CDC emphasized in its epidemiological surveillance report.

The agency advises that anyone experiencing the aforementioned intestinal infection symptoms should immediately contact a healthcare facility for testing and timely treatment.

Binh Minh (According to Fox News)

By VnExpress: https://vnexpress.net/bi-an-loai-ky-sinh-trung-gieo-rac-dich-tieu-chay-tai-17-bang-o-my-5093140.html
Tags: mystery parasite parasite U.S. intestinal infection Cyclospora causes diarrhea

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