Karmactive Staff
Estimated reading time: 2 minutes
A parasite outbreak spreading across 15 states has reached record levels, surpassing the highest case count recorded in the United States. The illness, called cyclospora, has infected nearly 2,000 people who ate at Taco Bell restaurants, with investigators tracing the problem to contaminated lettuce imported from Mexico.
The scope is unusual for a single restaurant-linked cluster. Cyclosporiasis is normally reported in the low thousands nationwide each year across all sources, so a single supply chain accounting for close to 2,000 confirmed cases makes this one of the largest restaurant-associated cyclospora clusters documented in the United States. Two people in Michigan have died from the infection as of August 3, 2026, both individuals who already had serious underlying health conditions that were affected by the illness and dehydration.
Taco Bell lettuce supplier Taylor Farms de Mexico recalled all iceberg lettuce sourced from central Mexico on July 17. Federal investigators found that 90 percent of sick people interviewed in Michigan reported eating iceberg lettuce at Taco Bell restaurants. In total, more than 1,644 people became ill after eating at Taco Bell locations in Indiana, Kentucky, Michigan, Ohio, and West Virginia between May and July. The outbreak later expanded to additional states including Arkansas, Iowa, Missouri, Nebraska, New Hampshire and North Carolina, bringing the total to 15 states with 1,947 confirmed cases as of August 5, 2026.
Cyclospora is a microscopic parasite that lives in contaminated food and water. When people eat infected produce, the parasite causes an intestinal illness. Symptoms typically appear one week after exposure, though they can show up as soon as two days or take up to two weeks or longer. Sick people experience watery diarrhea, loss of appetite, and severe fatigue that can last for weeks if untreated. There have been at least 517 hospitalizations linked to the broader national cyclospora outbreak since May 1.
Cyclospora does not respond to the supportive care used for most stomach bugs, but it does respond to a specific antimicrobial treatment: trimethoprim-sulfamethoxazole, sold as Bactrim, Septra or Cotrim, which the CDC lists as the treatment of choice. People must be tested specifically for cyclospora because routine stool tests often don’t screen for it. This is why doctors recommend asking for a cyclospora test if you have persistent diarrhea after eating suspect foods.
The CDC investigation has identified the common source through traceback investigation. The supply chain from grower to distributor to restaurant revealed the contaminated lettuce pathway. Foodborne illness experts emphasize how quickly produce contamination can spread through restaurant supply chain networks when produce handling protocols fail.
If you visited Taco Bell between May and July and experienced persistent diarrhea, fatigue, or abdominal cramps, seek medical attention and mention the possibility of cyclospora infection. Early diagnosis and treatment with trimethoprim-sulfamethoxazole can significantly reduce illness duration and prevent serious complications.
