Texas has recorded up to 30 cases of cyclosporiasis as part of a multistate outbreak of the foodborne illness, according to the U.S. Centers for Disease Control and Prevention.
The CDC said the outbreak has affected at least 17 states and sickened at least 145 people nationwide. No deaths have been reported.
Cyclosporiasis is caused by the parasite Cyclospora, which is commonly transmitted through contaminated raw produce. The parasite can also spread through contact with contaminated water or human feces.
Health officials said infections typically increase during the warmer months, when people consume more fresh fruits and vegetables. This year’s outbreak, however, has resulted in a rise in reported cases across the country.
Symptoms usually appear between two days and two weeks after exposure. The illness commonly causes diarrhea accompanied by cramping and bloating. Other symptoms include nausea, fatigue, loss of appetite and weight loss, although some infected people may not develop symptoms.
Catherine Troisi, a professor of epidemiology at UTHealth Houston School of Public Health, said the illness is generally not contagious from person to person and is rarely fatal.
“If you are sick, it is important to contact your healthcare provider because the illness can be treated with antibiotics,” Troisi told the Texas Standard. She said untreated infections can become serious, particularly among older adults, young children and people with weakened immune systems.
The CDC and the U.S. Food and Drug Administration are working with state and local health officials to identify the source of the outbreak. Although cyclosporiasis outbreaks are often traced to a single food item, Troisi said investigators have not ruled out multiple contaminated sources.
Health officials are focusing their investigation on raw fruits and vegetables. Produce such as leafy greens, including spinach and cilantro, and berries such as raspberries have previously been linked to Cyclospora contamination.
Troisi advised consumers to wash their hands, food preparation surfaces and fresh produce before eating or preparing raw fruits and vegetables. She also recommended trimming away bruised or damaged portions of produce and using an acidic rinse, such as lemon juice or vinegar, as an added precaution.
Officials urged anyone experiencing symptoms of cyclosporiasis to seek medical care. People who test positive are also encouraged to report their illness to their local health department.
