Largest US outbreak of explosive diarrhoea parasite is over, officials say

September 12, 2026

The Centers for Disease Control and Prevention has declared an end to the United States' largest cyclospora outbreak, which infected over 12,000 people across 21 states in recent months. The intestinal parasite, which causes severe diarrhea, resulted in 570 hospitalizations and two deaths among individuals with underlying health conditions. Health officials traced the outbreak to contaminated lettuce imported from central Mexico by Taylor Farms, a major supplier to American food establishments.

Who is affected

More than 12,000 people infected across 21 states (with nearly 20,000 confirmed cases nationwide since May 1)
570 people hospitalized
Two people in Michigan who died (both had significant underlying health conditions)
Taylor Farms (supplier that recalled lettuce)
Taco Bell and other US food outlets supplied by Taylor Farms
UK travelers who contracted the parasite

What action is being taken

The CDC is continuing to investigate the cause of the infection
Taylor Farms is conducting a voluntary recall of lettuce sourced from central Mexico
Taco Bell has removed lettuce from the supplier from its menu

Why it matters

This represents the largest outbreak of cyclospora in US history, far exceeding the previous worst year in 2019 when approximately 4,700 cases were reported. The outbreak demonstrates the vulnerability of the US food supply chain to contamination from imported produce and highlights the serious health risks posed by foodborne parasites, particularly for individuals with underlying health conditions. The scale of the outbreak—affecting 21 states with thousands of hospitalizations—underscores the importance of food safety protocols and rapid response systems to protect public health.

What's next

No explicit next steps stated in the article

Read full article from source: BBC