An outbreak in the United States has caused illness in over 1,000 individuals and resulted in numerous hospitalizations due to a parasite that triggers diarrhea. The cyclospora infections reported across several states have led to symptoms like watery diarrhea, bloating, fever, and nausea. While common during spring and summer, the current outbreak is unusually extensive, marking it as one of the nation’s largest outbreaks, with no fatalities reported.
Despite the rapid spread of the outbreak, the Public Health Agency of Canada has clarified that there are no ongoing investigations in Canada related to this parasite. The agency stated that the parasite is not commonly found in Canadian food or drinking water sources.
Cyclospora, a small round parasite, is known for causing watery diarrhea with frequent and sometimes forceful bowel movements. The condition, termed cyclosporiasis, is typically non-life-threatening and can be managed with antibiotics. The parasite thrives in warm environments and spreads through fecal matter, often infecting individuals who consume fruits or vegetables grown in feces-contaminated soil.
Experts suggest that the outbreak may be linked to imported produce from regions like South and Central America, the Caribbean, Southeast Asia, or Africa. Symptoms of the infection can manifest up to two weeks after exposure and persist for about two months. While less common compared to other foodborne illnesses like salmonella and E. coli, cyclospora cases have been on the rise due to factors such as climate change and enhanced detection methods.
Michigan has reported a significant surge in cases, with 1,251 infections recorded, particularly concentrated in the southeastern part of the state. Nearby regions like Lucas County, Ohio, have also reported a high number of cases, with investigations ongoing in 28 other states, including Illinois and New York. The outbreak’s source remains unidentified, posing challenges for containment.
Despite the escalating situation, the outbreak does not warrant a national health emergency declaration. Health officials affirm that there is no evidence of increased infectiousness of the parasite and emphasize that cyclospora cases are frequently reported in the U.S. annually. Dr. Natasha Bagdasarian highlights Michigan’s proactive reporting as a possible reason for the apparent concentration of cases in the state.
While Canada remains unaffected by the current outbreak, historical data shows an average of 238 cyclosporiasis cases reported annually between 2004 and 2019 in the country. Canadians are advised to seek medical attention if they suspect infection and should exercise caution when traveling to the U.S., avoiding raw fruits and vegetables or opting for cooked or peelable produce like grapes. Washing produce may not eliminate the parasite, and specific precautions like consuming whole heads of lettuce or freezing fruit are recommended to reduce the risk of infection.