Health officials are issuing a warning: what many dismiss as a routine stomach bug may actually be a significant parasitic outbreak. The Centers for Disease Control and Prevention has confirmed over 1,600 domestic cases of cyclosporiasis since May, with thousands more under investigation across 34 states.
The illness is caused by Cyclospora, a microscopic parasite spread through contaminated food or water. Cases are surging, particularly in the Midwest.
The key distinction from a common viral stomach bug is duration and severity. While typical viruses resolve in 24 to 48 hours, cyclosporiasis causes prolonged, severe watery diarrhea and cramping that can last much longer.
"It lasts longer, with far more profound watery, foul-smelling diarrhea and abdominal cramping," said Dr. Kenneth Perry, an emergency physician.
Diagnosis is a challenge. The parasite is not detected by standard stool tests or many gastrointestinal panels. Doctors must specifically request a Cyclospora test, which may require multiple stool samples. Patients should consult their primary care physician for proper screening.
The infection is treatable with specific antibiotics, primarily trimethoprim-sulfamethoxazole. Health experts urge people to stay hydrated and contact a doctor if diarrhea lasts more than two to three days or shows signs of dehydration.