Michigan Cyclosporiasis Cases Rise 11% as Health Officials Report Processing Backlog

Michigan health officials reported 13,909 cases of cyclosporiasis on Thursday, marking an 11% increase from the previous week. However, state officials emphasized that the rise largely reflects laboratory processing backlogs rather than new infections, suggesting the worst of the outbreak may be over.

The CDC added Maine and Massachusetts to the multistate outbreak, bringing the total to 17 states affected by the parasitic disease linked to contaminated iceberg lettuce.

"The data suggests that new cyclosporiasis case reports are slowing," said Laina Stebbins, spokesperson for the Michigan Department of Health and Human Services. Some newly reported cases represent delays at laboratories, with Corewell Health previously warning that test results could take 8 to 21 days due to the outbreak volume.

Within Michigan, Wayne County recorded the highest case count at 1,794, followed by Oakland County with 1,344. People aged 30 to 39 accounted for the largest number of infections with 2,615 cases. The state reported 314 hospitalizations and two deaths, both in individuals with significant underlying health conditions.

Acting FDA Commissioner Kyle Diamantas assured consumers this week that all iceberg lettuce linked to the outbreak has been removed from the market, making it safe to resume eating fresh produce.

The outbreak has had significant economic impact, with U.S. lettuce producer prices plunging 73% in July. Restaurant chains including Taco Bell and Chipotle reported decreased foot traffic as diners avoided leafy greens.

Frequently Asked Questions

Q: What is cyclosporiasis and how is it spread?

A: Cyclosporiasis is a parasitic infection caused by Cyclospora cayetanensis. It spreads through contaminated food or water, with this outbreak linked to iceberg lettuce. The parasite causes explosive diarrhea and has a two-week incubation period, making it difficult to trace.

Q: How many cyclosporiasis cases are in Michigan?

A: Michigan has reported 13,909 cases as of August 13, 2026. Wayne County has the most cases (1,794), followed by Oakland County (1,344). The state has recorded 314 hospitalizations and two deaths.

Q: Is it safe to eat lettuce now?

A: According to the acting FDA Commissioner, yes. The FDA is confident that all iceberg lettuce linked to the outbreak has been removed from the market. However, consumers should always wash produce thoroughly and practice food safety.