The Cyclosporiasis Outbreak, Is There Cause For Concern In Arizona?

In May, an outbreak of Cyclosporiasis began to hit the U.S. By early July, federal agencies began recalling cilantro, basil, and mixed herb packs tied to the growing contamination. With cases climbing, the illness quickly became one of the summer's biggest food‑safety concerns. I have heard people all over town worrying about it, but is there actually a cause for concern here in Arizona?

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What is Cyclosporiasis?

According to the Centers for Disease Control, Cyclosporiasis is caused by Cyclospora, a microscopic parasite that triggers a severe gastrointestinal illness, with symptoms such as diarrhea, loss of appetite, nausea, fatigue, and dehydration. People become infected by consuming contaminated food or water. In a typical year, the U.S. sees around 1,500 cases, mostly in summer when warm conditions support parasitic growth.

The illness isn’t able to be passed directly between people, and isn't usually dangerous, but symptoms can last for weeks without treatment. Those with weakened immune systems or dehydration risks face higher chances of complications. Because symptoms resemble other stomach illnesses, many infections go unnoticed, making lab testing and produce‑tracking essential during outbreaks.

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2026 Outbreak

As of July 24th, the CDC has confirmed 4,173 cases, and is currently investigating 7,400 potential cases linked to the outbreak. Several states reported infections tied to imported cilantro, iceberg lettuce, salad mixes, and basil, prompting multi‑state recalls and supply‑chain investigations.

Between May 1st and July 24th, the CDC has reported over 308 hospitalizations related to the outbreak, though no deaths have been reported. Taco Bell temporarily stopped selling leafy greens, and the outbreak is currently suspected to have started with food that Taylor Farms was distributing. As of July 17th, Taylor Farms recalled most of its vegetables.

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a skeleton with a red circle around it's stomach

Is the Outbreak in Arizona?

Arizona has reported around 20-30 cases of Cyclosporiasis in 2026, primarily in the Phoenix area. However, health officials confirm none are linked to the nationwide outbreak. The state typically sees 20–50 cases a year between May and September, meaning Arizona is well within normal levels of infection.

The hardest‑hit states include Michigan (900+ cases), Ohio (300+), Illinois, North Carolina, and New York (100+), and other states in that region. Arizona sits far below outbreak activity and has no evidence of contaminated shipments affecting local consumers.

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If you are worried about contracting this illness, wash produce thoroughly, and cook foods to 158°F to kill Cyclospora. While the outbreak sounds alarming, Arizona’s cases remain low and unrelated to the national surge. For more guidance on how to avoid getting a parasite this summer, visit the Arizona Department of Health Services website.

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