West Virginia health officials are grappling with a sharp surge in cyclosporiasis, a parasitic illness known for causing severe diarrhea and gastrointestinal distress. As of July 2026, the state has reported a concerning number of cases, prompting a statewide outbreak declaration. This outbreak is part of a broader trend of Cyclospora infections across the U.S. in 2026, with Ohio and Indiana among the affected states.
Cyclosporiasis: Symptoms and Transmission
Cyclosporiasis, caused by the microscopic parasite Cyclospora, is a foodborne illness that spreads through contaminated food or water. The most common symptoms include explosive diarrhea, abdominal cramps, and dehydration. The disease can be particularly dangerous for vulnerable populations, such as the elderly and immunocompromised individuals. According to the CDC, outbreaks often peak during the summer months, when contaminated produce is more prevalent.
Health Advisory Across Multiple States
The outbreak has spread beyond West Virginia, with Ohio and Indiana also reporting increasing cases of cyclosporiasis in 2026. The CDC has confirmed 145 cases across 17 states, highlighting the widespread nature of the outbreak. The CDC is collaborating with state and federal partners to identify the sources of contamination and prevent further spread of the illness. The CDC has released guidelines on safe food handling and prevention tips to help residents protect themselves from the parasite.
The CDC has issued a health advisory warning the public about the risks of consuming contaminated produce and encouraging proper food handling.
Surveillance and Response Efforts
Surveillance efforts are ongoing, with health officials closely monitoring the situation. In West Virginia, the state health department has reported a significant increase in cases, with an average of nine annual reports jumping to 47 in 2026. The state has declared a statewide outbreak, urging residents to be vigilant about food safety practices. This outbreak underscores the importance of robust public health surveillance and response mechanisms to control the spread of cyclospora outbreaks.
