Washington: More than 4,100 people have been infected in a widespread Cyclospora outbreak across the United States, with hundreds requiring hospital treatment as health authorities continue investigating the source of the parasitic illness.
The US Centers for Disease Control and Prevention (CDC) said the outbreak has affected people in 41 states, with 308 confirmed patients admitted to hospital. No deaths have been reported.
Officials also said around 7,400 suspected cases are under review, warning that the total number of infections could increase as investigations continue.
Cyclospora is caused by the Cyclospora cayetanensis parasite, which is commonly spread through contaminated food or water. Symptoms usually appear about a week after exposure and include prolonged diarrhoea, stomach cramps, nausea, fatigue and loss of appetite. Without treatment, the illness can last for several weeks or even longer.
US investigators have linked many of the reported cases to lettuce products. On July 17, food producer Taylor Farms recalled iceberg lettuce grown in Mexico and supplied to retailers and restaurants after investigators identified the company’s Mexican facilities as a possible source of contamination.
Mexican authorities, however, have rejected the claim. Health Secretary David Kershenobich said there was no evidence that the outbreak originated in the central Mexican state of Guanajuato, where investigations are continuing. He said officials had not found proof linking the state to the infections.
The investigation has also been complicated by conflicting information from the US Food and Drug Administration (FDA). The agency initially reported that a sample of Mexican lettuce had tested positive for the parasite but later said the result was a false positive after reviewing the data.
Despite that, the FDA said its ongoing supply chain investigation still points to Taylor Farms’ Mexican facilities as the most likely source of the outbreak. Health officials have advised consumers to follow recall notices and practise proper food hygiene while the investigation continues.
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