Increase in Cyclosporiasis Cases in the U.S.

SAN FRANCISCO — Cases of cyclosporiasis, an intestinal infection from a parasite, have now appeared in nearly 30 states, according to data tracked by ABC News.

As of Friday, approximately 2,944 cases have been reported across 32 states, based on information from the Centers for Disease Control and Prevention (CDC) and various state health departments.

In California, figures indicate there are between 1 and 10 cases reported.

The CDC has noted that the real number of infections may be higher since many individuals recover without seeking medical treatment or testing for the parasite.

Most of the cases are concentrated in Michigan, which has reported 1,562 cases as of Friday. At least 44 individuals have been hospitalized in that state.

This number is significantly above the roughly 50 cases that Michigan typically sees annually, according to state health officials.

Michigan health authorities suggest that the outbreak might be tied to food contamination, but as of yet, no specific produce, grower, or supplier has been pinpointed.

The CDC states that the parasite generally spreads through food or water that has been contaminated with feces.

Historically, foodborne outbreaks of cyclosporiasis have been associated with various imported fresh produce, such as raspberries, basil, snow peas, mesclun lettuce, and cilantro.

New York is reporting the second-highest number of cases at 470 since May 1, followed by Ohio with 364 cases. Illinois and Florida have also reported over 100 cases each, according to their respective health departments.

The most common symptom of cyclosporiasis is watery diarrhea, which can come with frequent and sometimes explosive bowel movements. Symptoms can also include nausea, vomiting, abdominal pain, and bloating.

The incubation period from infection to symptom onset is typically around one week, but it can range from two days to two weeks. This delay can complicate identifying the cause of infection, as noted by medical professionals.

Cyclosporiasis is treated with the antibiotic trimethoprim-sulfamethoxazole (TMP-SMX), often available under names like Bactrim, Septra, and Cotrim, and is usually taken over a 10-day period.

To reduce the risk of infection, the CDC advises washing all produce thoroughly, discarding any damaged or bruised parts of fruits and vegetables, and keeping pre-cut or prepared produce refrigerated.

Additionally, it’s recommended to wash hands well with soap and water before handling raw fruits and vegetables.