A significant gastrointestinal illness, cyclosporiasis, is rapidly spreading across several states, with Michigan reporting over 700 confirmed cases in recent weeks. The surge in diagnoses has led to intense demand for testing, overwhelming laboratory capacity as patients seek help for severe diarrhea and abdominal cramps.
The exact source of the outbreak remains unknown, though the Food and Drug Administration (FDA) has stated that an investigation is underway. Health officials are working to identify the contaminated food items responsible for the illnesses, with some labs experiencing delays in test turnaround times, potentially necessitating treatment based on symptoms alone.
Symptoms and Spread
Cyclosporiasis is a foodborne illness caused by the microscopic parasite Cyclospora, commonly linked to contaminated fresh produce. Symptoms typically include explosive, watery diarrhea, accompanied by significant gas, stomach cramps, nausea, and loss of appetite. The incubation period can range from one to two weeks after consuming contaminated food, complicating outbreak investigations.
Unlike highly contagious viruses such as norovirus, cyclosporiasis does not spread from person to person. However, if left untreated, symptoms can persist for weeks. Treatment usually involves antibiotics, and some individuals have required hospitalization due to dehydration. No deaths have been reported in connection with the current outbreak.
Outbreak Scope and Investigation
While Michigan has seen a dramatic increase in cases, with over 700 confirmed in approximately 10 days, which is highly unusual compared to the typical 40 to 50 cases annually, illnesses have also been reported in Ohio, North Carolina, Illinois, and New Jersey. Health officials are collecting detailed information from patients, including their grocery shopping habits, restaurant visits, and specific food purchases, to pinpoint the common source.
The Centers for Disease Control and Prevention (CDC) and the FDA are monitoring the situation. Previous outbreaks of cyclosporiasis have been associated with produce such as raspberries, bagged lettuce or salads, cilantro, and basil. The parasite is known to cling to produce, making thorough washing essential, though not always sufficient to eliminate risk. Michigan health officials recommend purchasing whole heads of lettuce and discarding outer leaves before washing.
The investigation aims to determine if the current cases are linked to a single, multistate outbreak or multiple separate incidents. The parasite is difficult to remove from certain produce, like raspberries, due to their porous texture.
Preventative Measures
While rinsing produce can reduce the risk of cyclosporiasis, it does not guarantee complete elimination of the parasite. Cooking food thoroughly is identified as the only certain method to kill the Cyclospora parasite. Freezing may also be effective, but its reliability is not guaranteed.
Steve Lopez is the Editorial Page Editor for News Raise. He covers Health. He has won more than a dozen national journalism awards for his reporting and column writing at seven newspapers and four news magazines.
