Hundreds Sickened at Ohio Resort Island
The generally 24-hour symptoms have struck vacationers usually within two or three days of visiting South Bass Island.
Several cases of symptoms that included nausea, vomiting, diarrhea, and cramps were identified at the beginning of August, although some may have occurred as early as June, authorities said.
A few cases have been blamed on two bacteria, salmonella and campylobacter, which commonly cause thousands of illnesses each year in the United States. A few other cases were caused by a viral infection called norovirus, another common cause of gastroenteritis, authorities said.
A team of 30 investigators, including three from the U.S. Centers for Disease Control, is testing water supplies, waste water and other possible sources of the illness.
The island's beaches and bars normally draw about 15,000 people on summer weekends, although business was off in recent weeks due to the illness outbreak.