Cyclosporiasis Outbreak Surpasses 3,300 Cases in Michigan, Spreads Across US
A massive cyclosporiasis outbreak, causing severe diarrheal illness, has infected over 3,300 people in Michigan and spread to 34 US states since May 2026. Lettuce and bagged salad are suspected sources, though no specific supplier has been identified. The CDC’s removal of cyclospora from active surveillance has raised detection concerns. Over 44 hospitalizations have occurred, with no deaths reported. Health officials urge caution as cases continue to surge.
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Michigan Surpasses 10,000 Cyclosporiasis Cases as National Outbreak Source Remains Unknown
Michigan health officials reported over 10,000 cyclosporiasis cases in the state, with 160 hospitalizations, as part of a larger outbreak of more than 11,500 cases across 41 states over the past two months. The outbreak has disproportionately affected Michigan, which accounts for the vast majority of infections. Investigators have identified one likely source but remain uncertain about other origins of the infection. The article, published by Forbes on July 29, 2026, notes this is a developing story with ongoing efforts to trace the source of the parasitic illness.
Cyclospora Outbreak Map: States Affected by Diarrhea Parasite and Most Cases
A cyclosporiasis outbreak, causing weeks of watery diarrhea, is centered in the Midwest, with Michigan and Ohio having the most cases. As of July 21, 2026, Georgetown University's Health Security Operations Center reported at least 11,276 cases across 46 states, though CDC figures are lower due to differing confirmation criteria. The FDA and CDC expanded the outbreak from five to nine states: Illinois, Indiana, Kansas, Kentucky, Michigan, Ohio, Oklahoma, Pennsylvania, and West Virginia. Taylor Farms voluntarily recalled iceberg lettuce sourced from central Mexico, distributed from June 29 to July 16 in 27 states. The parasite is resistant to disinfectants, and cooking food to at least 158°F is recommended to kill it. Experts note multiple concurrent outbreaks, with the Midwest outbreak described as 'its own beast' not yet slowing down. The typical cyclospora season lasts until late August, and cases may continue to rise.
US Cyclospora Outbreak Map Shows Michigan as Hotspot with Over 4,300 Cases Linked to Lettuce
A cyclosporiasis outbreak has infected over 8,260 people across 45 US states since May 1, with Michigan reporting the highest number of confirmed cases at more than 4,300. The parasite causes weeks of watery diarrhea and is resistant to disinfectants. The FDA identified shredded iceberg lettuce from a Mexican supplier, Taylor Farms, sent to Taco Bell locations in five states as one source, though other foods may also be involved. Ohio (1,409), New York (510), Indiana (327), and North Carolina (307) also report significant case counts. Health officials note that Michigan's high numbers may reflect better testing and reporting rather than the outbreak's origin. The CDC warns the typical cyclospora season lasts until late August, and cases may continue rising. Cooking food to at least 158°F kills the parasite, while washing produce is not fully effective.
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US Cyclosporiasis Outbreak Map Shows Michigan as Hotspot; Lettuce and Bagged Salad Suspected
A cyclosporiasis outbreak, causing parasitic diarrhea, has been reported across 34 US states since May 1, with Michigan emerging as the primary hotspot. CDC data as of July 13 shows 1,645 confirmed cases nationally, with Michigan reporting 501-900 cases, far exceeding its annual average of 40-50. New York, North Carolina, Indiana, Connecticut, Kansas, and West Virginia also saw significant spikes. Early investigations by the Michigan Department of Health and Human Services suggest lettuce or bagged salad as possible sources, though no specific producer has been identified. The parasite is resistant to disinfectants, and symptoms can take up to two weeks to appear. Experts note Michigan's high case count may reflect better testing and reporting rather than the outbreak's origin. Ohio has reported 364 cases and 46 hospitalizations separately.
Michigan Cyclosporiasis Outbreak Surpasses 3,300 Cases; Lettuce Suspected as Source
Michigan has reported over 3,300 confirmed cases of cyclosporiasis, a parasitic diarrheal illness, as of July 14, 2026, with nearly 700 new cases added in a single day. The outbreak, which has spread across 31 states, has hit Michigan hardest, with 44 hospitalizations. Monroe and Wayne counties, including Detroit, are the most affected. Preliminary investigations suggest lettuce or salad greens may be the source, though no definitive product has been identified. Ohio has reported 434 cases and New York 470. The surge follows the CDC's decision to remove cyclospora from its active surveillance program, raising concerns among experts about detection and response capabilities. The parasite is transmitted through contaminated food or water and causes watery diarrhea, cramping, and weight loss.
Map Shows Michigan as Hotspot for Parasitic Diarrhea Outbreak Linked to Lettuce
A cyclosporiasis outbreak, caused by the Cyclospora parasite and leading to diarrhea, has infected at least 843 people across 31 US states since May 1, according to CDC data. Michigan is the primary hotspot with 161-300 confirmed cases, though state health departments report higher numbers: Michigan has 2,640 cases and Ohio 364 cases. The CDC acknowledges case counts are likely underreported. Early investigations by Michigan health officials suggest lettuce and bagged salad as possible sources, though no specific grower or supplier has been identified. The parasite is resistant to disinfectants, making washing produce insufficient. Symptoms, including watery diarrhea and stomach cramps, can take up to two weeks to appear. Experts note Michigan's high case count may reflect better testing and reporting rather than the outbreak's origin. The article includes a map and state-by-state breakdown of cases.
Cyclosporiasis Cases Rapidly Jump In Michigan—More Than 2,600 Total Infections Confirmed
Michigan has reported over 2,600 cases of cyclosporiasis, a diarrheal parasitic illness, as of July 13, 2026, a jump of more than 1,000 cases from the previous Friday. The outbreak has spread across 31 states, with Michigan being the hardest hit, followed by New York (470 cases) and Ohio (434 cases). The cause of the outbreak remains unknown, and health officials are investigating. The CDC had previously removed cyclospora from its FoodNet surveillance program, raising concerns among experts about detection capabilities. Symptoms include watery diarrhea, cramping, and weight loss. The disease spreads through contaminated food or water and is not transmitted person-to-person.
Cyclosporiasis Outbreak Challenges RFK Jr. and CDC in Midwestern US
An outbreak of cyclosporiasis, a parasitic infection causing explosive diarrhea, is spreading rapidly across the Midwestern United States, with nearly 700 confirmed cases in Michigan and Illinois. The CDC initially reported 145 cases last month, but Michigan health officials confirmed 100 new cases in just nine days as of July 1. Symptoms include diarrhea, appetite loss, bloating, nausea, cramping, and fatigue. Cases range from ages 5 to 86, with over 60% being women. Twenty people have been hospitalized, but no deaths have been reported. The outbreak is unusually large compared to last year's 50 cases in Michigan. Health Secretary Robert F. Kennedy Jr. faces a significant test amid extremely low public trust in the CDC and high summer temperatures. Michigan's chief medical executive warns of additional cases and urges residents to seek medical care for sudden, ongoing diarrhea.