Cyclospora Outbreak Surges Past 4,000 Cases Across States

WHO:

The Columbus Dispatch - The Centers for Disease Control and Prevention (CDC) reported over 6,700 lab-confirmed cases of cyclosporiasis nationally.

KCCI - Iowa Health and Human Services Department reported 226 confirmed cases of cyclosporiasis in Iowa.

WHAT:

The Columbus Dispatch - Ohio's case numbers increased to 4,013 cases in 80 counties, with 1,500 new cases added in the past week.

The Columbus Dispatch - The CDC reports 423 hospitalizations related to cyclosporiasis, with Ohio accounting for 172 of those hospitalizations this year.

The Columbus Dispatch - Michigan reported more than 10,000 cases of cyclosporiasis as of July 29, differing from CDC numbers due to pending confirmations.

KCCI - Iowa's Health and Human Services Department confirmed 226 cases of cyclosporiasis from 48 counties, with 47 patients reporting international travel.

KCCI - The CDC estimates more than 19,000 cases of cyclosporiasis connected to the national outbreak.

The Columbus Dispatch - Ohio's case numbers increased to 4,013 cases in 80 counties, with 1,500 new cases added in the past week.

The Columbus Dispatch - The CDC reported 6,707 laboratory-confirmed cases of cyclosporiasis since May 1, marking an increase of over 2,500 cases since the last report on July 21.

KCCI - The CDC estimates that more than 19,000 cases of cyclosporiasis are connected to the national outbreak.

The Columbus Dispatch - The most cases in Ohio are in Lucas County, which reports 554 cases, an increase from 435 the previous week.

The Columbus Dispatch - Cuyahoga County reports 459 cases, up from 446, and Wood County reports 446 cases, up from 309.

The Columbus Dispatch - Ohio's case numbers increased from 2,576 cases in 78 counties as of July 23 to 4,013 cases as of July 31, marking a 55% increase.

The Columbus Dispatch - The CDC reports 423 hospitalizations related to cyclosporiasis, with Ohio accounting for 172 of those hospitalizations this year.

The Columbus Dispatch - Michigan reported more than 10,000 cases of cyclosporiasis as of July 29, differing from CDC numbers due to pending confirmations.

The Columbus Dispatch - Ohio added another 1,500 cases of cyclosporiasis in the past week, bringing the total to 4,013 cases in 80 counties for 2026.

The Columbus Dispatch - The CDC reports over 6,707 laboratory-confirmed cases of cyclosporiasis since May 1, with an additional 11,500 cases yet to be confirmed.

KCCI - Iowa's Health and Human Services Department confirmed 226 cases of cyclosporiasis from 48 counties, with 47 patients reporting international travel.

KCCI - The CDC estimates more than 19,000 cases of cyclosporiasis connected to the national outbreak.

The Columbus Dispatch - A nationwide cyclosporiasis outbreak has reached over 6,700 lab-confirmed cases since May 1.

The Columbus Dispatch - Ohio reported 4,013 cases of cyclosporiasis as of the latest update, with a 55% increase in cases.

KCCI - Iowa has 226 confirmed cases of cyclosporiasis from 48 counties.

KCCI - The CDC estimates more than 19,000 cases of cyclosporiasis connected to the national outbreak.

WHERE:

The Columbus Dispatch - The outbreak has now reached 45 states, with only Hawaii, Maine, Montana, New Mexico, and South Carolina reporting no cases.

The Columbus Dispatch - The most cases in Ohio are in Lucas County, reporting 554 cases, followed by Cuyahoga County with 459 cases and Wood County with 446 cases.

The Columbus Dispatch - The outbreak has reached 45 states, with Ohio and Michigan being the most impacted.

KCCI - Iowa has reported cases from 48 counties, with Polk County having 32 confirmed cases.

WHEN:

The Columbus Dispatch - Ohio's case numbers increased from 2,576 cases in 78 counties as of July 23 to 4,013 cases as of July 31.

KCCI - The CDC reported that cases have been recorded since May 1.

WHY:

KCCI - Nine states, including Illinois, Indiana, Kansas, Kentucky, Michigan, Ohio, Oklahoma, Pennsylvania, and West Virginia, have reported related cases of diarrheal illness linked to iceberg lettuce.

The Columbus Dispatch - The largest outbreak has been linked to iceberg lettuce grown by Taylor Farms in central Mexico.

KCCI - Nine states have related cases of diarrheal illness thought to be linked with iceberg lettuce.

HOW:

KCCI - Iowa's health department conducts detailed interviews with patients to trace their food history for the past two weeks, aiding investigations at the state and federal level.

The Columbus Dispatch - The CDC is investigating the sources of multiple separate outbreaks.

KCCI - Iowa's health department conducts detailed interviews with patients to trace their food history for the past two weeks.

(UPDATED August 1, 2026 16:19 UTC)

Ohio's case numbers for cyclosporiasis have surged to 4,013 across 80 counties, with 1,500 new cases reported in just the past week, while the CDC has documented 423 hospitalizations related to the outbreak, including 172 from Ohio this year. Meanwhile, Michigan has reported over 10,000 cases as of July 29, although these figures differ from CDC numbers due to pending confirmations. In Iowa, health officials confirmed 226 cases from 48 counties, with many patients having traveled internationally, and the CDC estimates that more than 19,000 cases are linked to this national outbreak, which has now affected 45 states.

(UPDATED August 1, 2026 10:28 UTC)

Ohio's COVID-19 case numbers have risen to 4,013 across 80 counties, with 1,500 new cases reported in just the past week. Meanwhile, the CDC has confirmed over 6,700 cases of cyclosporiasis since May 1, marking an increase of more than 2,500 cases since July 21, and estimates suggest that over 19,000 cases are tied to a national outbreak affecting 45 states. In Ohio, Lucas County leads with 554 cases, followed by Cuyahoga County with 459 and Wood County with 446, as nine states report diarrheal illnesses linked to iceberg lettuce.

(UPDATED August 1, 2026 05:57 UTC)

Ohio has seen a significant rise in cyclosporiasis cases, jumping from 2,576 to 4,013 in just over a week, which is a 55% increase. The CDC has reported 423 hospitalizations related to the outbreak, with Ohio accounting for 172 of those this year, while Michigan has recorded over 10,000 cases as of July 29, although this figure may change as confirmations are pending. The outbreak has spread to 45 states, with only Hawaii, Maine, Montana, New Mexico, and South Carolina remaining unaffected, and nine states, including Ohio and Michigan, have reported cases of diarrheal illness linked to iceberg lettuce.

(UPDATED August 1, 2026 02:52 UTC)

Ohio has reported an additional 1,500 cases of cyclosporiasis in the past week, bringing the total to 4,013 cases across 80 counties for 2026. The CDC has confirmed over 6,707 laboratory cases since May 1, with an estimated 19,000 cases linked to the national outbreak, while Iowa's Health and Human Services Department has identified 226 cases, with many patients having traveled internationally. To aid in investigations, Iowa's health department is conducting detailed interviews with patients to trace their food history from the past two weeks.

(UPDATED July 31, 2026 22:26 UTC)

A nationwide outbreak of cyclosporiasis has now surpassed 6,700 lab-confirmed cases since May 1, with Ohio reporting a significant increase from 2,576 cases to 4,013 cases in just over a week. Iowa has confirmed 226 cases from 48 counties, with Polk County alone accounting for 32 of those cases. The outbreak has been linked to iceberg lettuce grown by Taylor Farms in central Mexico, and the CDC is actively investigating the sources of multiple outbreaks while states conduct interviews with patients to trace their food history.