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Another cyclospora outbreak?! Plus, the big one gets bigger.

The major Cyclospora outbreak expanded to 4 more states (IL, KS, OK, and PA), while the FDA added yet a 5th unique Cyclospora investigation. Meanwhile, a major egg recall, a 35-year high for measles, and a summer COVID wave is heating up.

July 24, 2026

Cyclospora Outbreak:

  • CDC reported Friday that 4 new states (IL, KS, OK, and PA) were linked to the ongoing lettuce-related outbreak, for a total of 9 states affected. (Washington Post, CDC)

  • FDA added a new, fifth Cyclospora outbreak to its CORE table, with 72 confirmed cases. This outbreak is separate from the one linked to Mexican lettuce. (FDA)

  • Meanwhile, North Carolina says commonly reported foods in its 307-case outbreak include parsley, cilantro, and lettuce, despite that it doesn’t look related to the major Taylor Farms lettuce outbreak. (NCDHHS)

  • Michigan’s case count is up by 1,600 cases since Tuesday, for a total of 8,176 as of Friday morning. (MDHHS)

  • Mexico’s health minister maintains that there’s no evidence yet that a farm in Guanajuato is the source of the U.S. Cyclospora outbreak, but the FDA says there’s “overwhelming epidemiological data.” (Washington Post)

Health News:

  • 1.6 million cartons of eggs were recalled at Kroger and other grocery chains due to Salmonella risk. (CBS)

  • U.S. measles cases have hit a 35-year high…and it’s only July. (Washington Post)

  • A summer COVID wave is continuing to creep up in the Midwest and West. (Brown Pandemic Center)

  • The Ebola outbreak in DRC is not under control - over 1,000 people have died and 2,400 cases are confirmed, though many more are suspected. (NPR)

  • There are two new cases of New World Screwworm in goats, cattle, and sheep in two new counties in TX, bringing the total to 42 (10 active). (Brown Pandemic Center)

  • 24% of workers stay in jobs they don’t like for health insurance. (STAT)

  • GLP-1 drugs were linked to a 17% drop in worker sick leave. (CBS)

  • FDA removed authorizations for two color additives: Orange B and Citrus Red No. 2. Meanwhile, they approved easier access to peptides. (FDA, NPR)

  • The WHO announced 3 new cases of H9N2 avian flu in humans, all in China. (CIDRAP)

  • Some good news: the available Ebola vaccine may provide some protection against the Bundibugyo strain. (MedPage Today)

Best Questions:

Some rapid-fire Cyclospora Q&As to get you through the weekend: 

Can you get Cyclospora more than once?

Unfortunately, yes. If you’re exposed again to Cyclospora, you can be re-infected - there’s no immunity after an infection. 

Some people think that they’ve been re-infected when, in fact, untreated cyclosporiasis can last weeks or even months, with symptoms improving and then returning. If you or an employee you manage have recurring, severe, watery diarrhea, it’s a good idea to seek treatment. Doctors can prescribe antibiotics that help. 

Sources: NYDOH, Harvard SPH

Why are antibiotics used to treat it if it’s a parasite?

It’s a bit counterintuitive for those of us that aren’t medical experts, but it turns out that Cyclospora is treatable with a course of antibiotics. That’s because strong, broad-spectrum antibiotics like Bactrim disrupt its ability to make folic acid, which is needed for the parasite to replicate. Symptoms usually start to improve within a few days of starting antibiotics.

Sources: Stanford Med

 

Can my employee work if his wife has cyclospora?

Yes, even if your employees are exposed with very close contacts, like children or household members, they can continue to work as long as they have no symptoms. That’s because Cyclospora doesn’t typically spread from person to person because it takes time (one to two weeks) to become infectious after being passed in a bowel movement. But because household members often eat similar foods, it’s important that the employee keep an eye out for symptoms and stay home if they experience any diarrhea.

Sources: ZHH, JHU

When can an employee who has had Cyclospora return to work?

We recommend asking for a doctor’s note for any employees with lab-confirmed Cyclospora. Though there is little risk for person-to-person transmission anywhere, including the workplace, this is a situation that requires some delicacy, especially with how much news coverage there is right now. Making sure a doctor clears them to work in foodservice ensures they’ve received the medical care they need and covers you. If other employees express concern, you can tell them that a doctor cleared them to work in a restaurant setting. Of course, the employee in question should only return to work once they’re at least 48-hours symptom free, meaning they’ve had no diarrhea at all for two full days before they return, regardless of what their doctor’s note says. They should also monitor for recurring symptoms (which are relatively common with Cyclospora if untreated) and stay home if diarrhea or other symptoms start again. 

Sources: ZHH, Iowa HHS, Mass DPH

Best Read:

We loved this nuanced take on the challenges of our current news media’s cycles of panic and confusion around public health. From hantavirus to cyclosporiasis, it can be hard to figure out the actual risk to you and your business amid all the chatter. 
 

Why is Gauging Health Risk So Hard? - Your Local Epidemiologist