US Cyclospora Outbreak Sickens 22,000 and Kills 2 as Sewage-Tainted Irrigation Comes Under Scrutiny
Updated
Updated · PBS NewsHour · Aug 15
US Cyclospora Outbreak Sickens 22,000 and Kills 2 as Sewage-Tainted Irrigation Comes Under Scrutiny
2 articles · Updated · PBS NewsHour · Aug 15
Summary
More than 22,000 people have been sickened in the largest recorded U.S. Cyclospora outbreak, with two deaths in Michigan, and researchers say sewage contamination in food and water is the likely driver.
Cyclospora spreads only through humans: infected people shed oocysts in feces for up to 60 days, sewage treatment may not fully remove them, and contaminated wastewater can return to crops or waterways used for irrigation.
Up to 25% of sewage samples in global studies have detected cyclospora, while older U.S. treatment-plant research on similar Protozoa found chlorine removed most—but not all—organisms, leaving some potentially infectious after discharge.
About 200 billion gallons of treated U.S. wastewater are used each year to irrigate agricultural land, yet few states specifically regulate or monitor protozoa such as cyclospora in treated sewage.
Researchers say broader wastewater surveillance, better filtration and UV disinfection could curb future outbreaks, especially as floods, droughts and hotter weather raise the risk of sewage-linked contamination.
Standard water treatment fails to destroy cyclospora. Is the push for sustainable wastewater recycling secretly fueling America's largest parasitic outbreak?
Washing raw produce doesn't kill this parasite. With billions of gallons of wastewater watering our crops, is any raw salad truly safe?
If routine medical tests miss it and washing vegetables fails, how can you spot the hidden parasite currently sickening thousands nationwide?