Cyclospora outbreak spreads nationwide with nearly 7,000 cases; DFW reports dozens

A parasite that typically appears in small, predictable waves each summer has exploded into something far larger this year. The Centers for Disease Control and Prevention issued a health advisory in early July about cyclosporiasis—an infection caused by the cyclospora parasite—that has now sickened nearly 7,000 people across 30 states since May 1. Last year, the entire United States recorded 249 confirmed cases. This summer alone, confirmed and suspected cases have topped 7,000, a tenfold surge that has caught public health officials off guard.

The outbreak is linked to contaminated leafy greens, though federal investigators have not yet identified which producer or vendor is responsible. The Food and Drug Administration and CDC are still working to pinpoint the source. In the meantime, major restaurant chains have begun taking precautions. Taco Bell, among others, has pulled lettuce and leafy greens from menus in certain regions, particularly Michigan, where the concentration of cases is highest and the risk feels most immediate.

Texas has not escaped the outbreak, though the state's burden remains lighter than the national picture. Fewer than 100 cases have been reported statewide. Dallas County has confirmed only a handful, and Tarrant County even fewer. Still, the numbers are enough to prompt local health officials to sound the alarm. Dr. Alejandro Perez, an infectious disease specialist with the Texas Centers for Infectious Disease Associates, noted the surprise factor: "This parasite, cyclospora, has this annual breakout, you know. But this is kind of surprising because the numbers now are actually much higher than we anticipated."

The illness itself is unpleasant and deceptive. Symptoms center on watery diarrhea, but what makes cyclospora distinctive is its pattern. The infection does not simply strike and fade. Instead, a person may experience days of illness, then recover for a stretch, only to have symptoms return. This on-and-off cycle can persist for weeks and makes the infection harder to diagnose and harder to endure. Dr. Philip Huang, director of Dallas County Health and Human Services, emphasized this characteristic: "You can get some recovery for a few days and then it comes back and that's one sort of distinctive characteristic about cyclospora in particular."

Symptoms typically emerge seven to ten days after exposure, which means many people may not immediately connect their illness to something they ate. Health officials are urging residents to keep a daily food journal during the outbreak period to help identify the source if they do become ill. Beyond that, the advice is straightforward but imperfect: wash fruits and vegetables thoroughly under running water. Dr. Carla Garcia Carreno, an infectious diseases specialist, acknowledged the limits of this approach while still recommending it. "Running water, soap for solid vegetables even though it doesn't decrease 100% or eliminate it 100% the parasite, it decreases their weight," she said. Eating more meals at home, where produce can be washed carefully, is also being encouraged.

The investigation into the source continues. Until federal agencies identify the contaminated product and its origin, the outbreak will likely persist. Restaurants will remain cautious, consumers will remain vigilant, and the parasite will continue its work in the nation's food supply—a reminder that even in an era of industrial agriculture and food safety protocols, invisible threats can still move through the system faster than anyone anticipated.