Nasty stomach bug Cyclospora infects 275 but no source identified ATLANTA, July 25 (UPI) -- U.S. health officials say more than 275 cases of Cyclospora have been reported from nine states -- most clustered in Iowa, Nebraska and Texas. The Centers for Disease Control and Prevention in Atlanta said the vast majority of cases were in Iowa with 127 cases, Nebraska with 68 cases and Texas with 65 cases. Other states reporting cases include: Wisconsin with four cases, Georgia with two cases, and one case each in Connecticut, Illinois, Kansas and New Jersey. CDC officials said it is not yet clear if the cases are part of the same outbreak, if there is a common source or if the infections are due to international travel. Most past infections were associated with international travel or contaminated basil, mesclun lettuce, raspberries and snow peas. Cyclospora cayetanensis is a parasite of one cell, too small to be seen without a microscope, that causes the intestinal infection cyclosporiasis. It is spread by people ingesting something that was contaminated with the parasite. The time between becoming infected and becoming sick is usually about a week and while some people have no symptoms, others might have diarrhea, loss of appetite, weight loss, stomach cramps/pain, bloating, increased gas, nausea and fatigue. The CDC said most of the illness onset dates ranged from mid-June through early July and at least 10 people were hospitalized in three states. No common events such as social gatherings were identified among the cases, the CDC said.