Cyclospora Outbreak Expands to 17 States, Including NY and MI

WHO:

WHEC.com - The Centers for Disease Control and Prevention (CDC) is investigating the outbreak.

ClickOnDetroit | WDIV Local 4 - Dr. Natasha Bagdasarian is the chief medical executive for the State of Michigan.

WHAT:

ABC News - More than 300 cases of cyclosporiasis have been confirmed in Michigan, significantly higher than the typical annual average of about 50 cases.

ClickOnDetroit | WDIV Local 4 - The Michigan Department of Health and Human Services (MDHHS) reported that the outbreak has grown to over 170 cases across at least seven counties in Michigan.

Detroit Free Press - More than 225 cases of cyclosporiasis have been identified in 21 Michigan counties and the city of Detroit, with the number expected to grow.

ClickOnDetroit | WDIV Local 4 - The Michigan Department of Health and Human Services (MDHHS) and Michigan Department of Agriculture and Rural Development (MDARD) are actively investigating the potential source of the outbreak.

Fox News - The CDC reports 145 confirmed cyclosporiasis cases across 17 states, with 20 patients hospitalized so far.

Detroit Free Press - More than 225 cases of cyclosporiasis have been identified in 21 Michigan counties and the city of Detroit between June 22 and July 1.

Detroit Free Press - The case tally includes Monroe (92 cases), Lenawee (36), Washtenaw (28), Wayne (17), Jackson (11), Shiawassee (9), Ingham (6), Oakland (5), Detroit (3), Huron (3), Livingston (3), Sanilac (3), Hillsdale (2), Lapeer (2), Eaton (1), Genesee (1), Gratiot (1), Houghton (1), Leelanau (1), Manistee (1), Ottawa (1), and Saginaw (1).

ClickOnDetroit | WDIV Local 4 - 20 people have been hospitalized due to the outbreak, but no deaths have been reported.

WHEC.com - At least 145 people nationwide have gotten sick with cyclosporiasis since May 1.

WHEC.com - Between 31 and 80 people in New York State have been reported sick.

ClickOnDetroit | WDIV Local 4 - More than 170 cases of cyclosporiasis have been confirmed across at least seven Michigan counties.

ClickOnDetroit | WDIV Local 4 - The number of cases in Monroe County is 70, with additional cases reported in Lenawee (33), Washtenaw (21), Wayne (12), Shiawassee (7), Jackson (7), and Livingston counties.

ClickOnDetroit | WDIV Local 4 - 24 cases have been reported across 11 other Michigan counties, including Detroit.

ClickOnDetroit | WDIV Local 4 - Typically, Michigan only sees around 50 cases of cyclosporiasis per year.

ClickOnDetroit | WDIV Local 4 - The age range of individuals diagnosed with the illness is from 8 years old to 84 years old, with a median age of 41.

WHERE:

WHEC.com - New York is one of the 17 states reporting cases of cyclosporiasis.

ClickOnDetroit | WDIV Local 4 - The outbreak is primarily located in Monroe County, Michigan, and has spread to at least seven counties in the state.

WHEN:

WHEC.com - The outbreak has been under investigation since May 1.

ClickOnDetroit | WDIV Local 4 - The cluster of cases in Monroe County has grown over the past nine days.

WHY:

WHEC.com - Most patients did not travel before symptoms began, indicating local transmission.

ClickOnDetroit | WDIV Local 4 - Recent outbreaks in the U.S. were caused by consumption of contaminated fresh produce, especially during the summer months.

HOW:

ABC News - The CDC stated that the illness can take about one week from the time of infection to become symptomatic, but this timeframe can range from two days to two weeks.

ClickOnDetroit | WDIV Local 4 - Symptoms of cyclosporiasis can occur anywhere from two to 14 days after exposure, and if untreated, the illness can last for days to over a month.

Detroit Free Press - The Michigan Department of Health and Human Services issued a health alert on June 30, asking physicians to test stool samples from patients with diarrhea and report positive results to local health departments within 24 hours.

WHEC.com - Cyclosporiasis is caused by several species of the microscopic parasite Cyclospora.

ClickOnDetroit | WDIV Local 4 - The illness spreads through food or water contaminated with feces.

(UPDATED July 3, 2026 01:29 UTC)

In Michigan, health officials have confirmed over 300 cases of cyclosporiasis, which is significantly higher than the usual annual average of around 50 cases. The Michigan Department of Health and Human Services has reported that this outbreak has expanded to more than 170 cases across at least seven counties. According to the CDC, symptoms of the illness can appear anywhere from two days to two weeks after infection, with an average onset time of about one week.

(UPDATED July 2, 2026 19:25 UTC)

In Michigan, more than 225 cases of cyclosporiasis have been reported across 21 counties and the city of Detroit, and health officials expect that number to rise. The Michigan Department of Health and Human Services and the Department of Agriculture and Rural Development are currently investigating the potential source of this outbreak, while the CDC has confirmed 145 cases in 17 states, with 20 patients hospitalized. Symptoms of cyclosporiasis can appear anywhere from two to 14 days after exposure, and if left untreated, the illness may persist for days or even over a month.

(UPDATED July 2, 2026 17:33 UTC)

In Michigan, more than 225 cases of cyclosporiasis have been reported across 21 counties and the city of Detroit in a recent outbreak. The Michigan Department of Health and Human Services issued a health alert, urging physicians to test stool samples from patients experiencing diarrhea and to report any positive results within 24 hours. While 20 individuals have been hospitalized due to the outbreak, thankfully, no deaths have been reported.

(UPDATED July 2, 2026 13:42 UTC)

The Centers for Disease Control and Prevention is currently investigating an outbreak of cyclosporiasis that has affected at least 145 people nationwide since May 1, with a significant number of cases reported in Michigan. In Monroe County alone, there are 70 confirmed cases, and the illness has spread to at least seven other counties, with the age of those affected ranging from 8 to 84 years old. Most patients did not travel before showing symptoms, suggesting local transmission, and the outbreak is believed to be linked to contaminated fresh produce, which is common during the summer months.