Experts Assess the Risks of Cyclosporiasis for Americans

WHO:

Newsweek - Keith Schneider, professor of food safety at the University of Florida.

Detroit Free Press - Dr. Anurag Malani, infectious disease specialist and health care epidemiologist at Trinity Health Ann Arbor Hospital.

Detroit Free Press - Dr. Rebecca Schein, pediatric infectious disease specialist at the University of Michigan Health-Sparrow.

Detroit Free Press - Joseph Eisenberg, professor of global public health and epidemiologist at the University of Michigan's School of Public Health.

WHAT:

Detroit Free Press - The number of cyclosporiasis cases in Michigan increased to 1,562 on July 10, up from 1,251 on July 9.

ClickOnDetroit - As of July 10, at least 44 people in Michigan had been hospitalized for treatment of cyclosporiasis tied to the current outbreak.

Detroit Free Press - The CDC reported 843 cases of cyclosporiasis nationally in 31 states as of July 9, indicating a rise compared to the same period in 2025.

Newsweek - Keith Schneider stated, "This is definitely a spike," referring to the increase in cyclosporiasis cases.

Detroit Free Press - The Ohio Department of Health reported a total of 364 cases of cyclosporiasis statewide as of July 9.

Detroit Free Press - The Toledo-Lucas County Health Department reported 441 positive cases in its jurisdiction alone as of July 9 and 661 people sickened throughout northwestern Ohio.

Detroit Free Press - The number of cyclosporiasis cases in Michigan increased to 1,562 on July 10, up from 1,251 on July 9.

Detroit Free Press - Dr. Anurag Malani stated, "There's many more cases than what is actually reported," indicating that the current count is likely an undercount.

ClickOnDetroit - The Michigan Department of Health and Human Services reported that 44 people were hospitalized due to cyclosporiasis as of July 10.

Detroit Free Press - More than 1,500 people in Michigan have been infected with cyclosporiasis since June 22.

Detroit Free Press - The number of cases in Michigan is rising at a rate of 20% to 30% per day.

Detroit Free Press - As of July 10, at least 44 people in Michigan had been hospitalized due to cyclosporiasis.

Detroit Free Press - 1,562 cases of cyclosporiasis reported in Michigan as of July 10.

Detroit Free Press - The CDC reported 843 cases of cyclosporiasis nationally in 31 states as of July 9.

WHERE:

Detroit Free Press - The Michigan Department of Health and Human Services reported that the 10 most heavily affected counties in Michigan include Monroe (215 cases), Wayne (172 cases), Washtenaw (159 cases), Lenawee (155 cases), Oakland (88 cases), Shiawassee (82 cases), Jackson (56 cases), Ingham (55 cases), Livingston (40 cases), and Genesee (35 cases).

ClickOnDetroit - The counties with the highest number of cases in Michigan include Monroe, Lenawee, Washtenaw, Wayne, Shiawassee, Jackson, Oakland, and Livingston.

Detroit Free Press - Michigan is experiencing a significant outbreak of cyclosporiasis.

Detroit Free Press - The 10 most affected counties in Michigan include Monroe, Wayne, Washtenaw, Lenawee, Oakland, Shiawassee, Jackson, Ingham, Livingston, and Genesee.

WHEN:

Detroit Free Press - The first cases of the outbreak were identified on June 22.

Detroit Free Press - The Michigan Department of Health and Human Services issued updated recommendations on July 4.

WHY:

Detroit Free Press - Joseph Eisenberg expressed concern that "the parasite is largely found in subtropical areas" and that climate change could lead to its geographic expansion in the U.S.

Detroit Free Press - The source of the outbreak is currently unknown, leading to concerns about further infections.

Detroit Free Press - Climate change may be a factor in the rising incidence of cyclosporiasis infections globally.

HOW:

ClickOnDetroit - The Michigan Department of Health and Human Services recommended cooking leafy greens, cilantro, basil, green onions, snow peas, and raspberries to a temperature of at least 158 degrees to kill the cyclospora parasite.

Detroit Free Press - Cyclosporiasis is caused by the cyclospora cayetanensis parasite, which can infect humans through contaminated food or water.

Detroit Free Press - Symptoms of cyclosporiasis typically begin two to 14 days after exposure and may include watery diarrhea, abdominal cramps, and nausea.

Detroit Free Press - The Michigan Department of Health and Human Services recommends cooking leafy greens and washing produce thoroughly to reduce the risk of infection.

(UPDATED July 12, 2026 01:21 UTC)

The number of cyclosporiasis cases in Michigan has surged to 1,562, a significant increase from 1,251 just the day before, with at least 44 individuals hospitalized due to the outbreak. Nationally, the CDC reported 843 cases across 31 states, reflecting a rise compared to the same time last year, prompting concerns from experts like Joseph Eisenberg about the potential for the parasite to spread further due to climate change. In response, the Michigan Department of Health and Human Services is advising residents to cook certain foods, including leafy greens and raspberries, to a temperature of at least 158 degrees to eliminate the cyclospora parasite.

(UPDATED July 11, 2026 17:17 UTC)

Health officials are raising alarms about a significant increase in cyclosporiasis cases, with the Ohio Department of Health reporting a total of 364 cases statewide as of July 9. In Toledo alone, the local health department has identified 441 positive cases, contributing to a total of 661 illnesses reported throughout northwestern Ohio. Experts like Joseph Eisenberg warn that the parasite, typically found in subtropical regions, may spread further in the U.S. due to climate change.

(UPDATED July 11, 2026 16:16 UTC)

Cyclosporiasis cases in Michigan have surged to 1,562, a significant increase from 1,251 just a day earlier, with Dr. Anurag Malani suggesting that the true number of infections is likely even higher than reported. As of the latest update, 44 individuals have been hospitalized due to the illness, with the highest case counts found in counties such as Monroe, Lenawee, and Washtenaw. To combat the spread of the cyclospora parasite, health officials recommend cooking leafy greens, cilantro, basil, green onions, snow peas, and raspberries to a minimum temperature of 158 degrees.

(UPDATED July 11, 2026 10:22 UTC)

Michigan is currently facing a significant outbreak of cyclosporiasis, with more than 1,500 reported cases since June 22 and a daily increase of 20% to 30%. As of July 10, at least 44 individuals have been hospitalized due to the infection, which is caused by the cyclospora cayetanensis parasite, typically spread through contaminated food or water. Health officials are urging residents to take precautions, such as thoroughly washing produce and cooking leafy greens, while the source of the outbreak remains unknown, raising concerns about further infections.