RIO DE JANEIRO (AP) — The International Olympic Committee said Sunday it will begin testing for disease causing viruses in the sewage-polluted waters where athletes will compete in next year's Rio de Janeiro Games. Before, the IOC and local Olympic organizers in Rio said they would only test for bacteria in the water, as Brazil and virtually all nations only mandate such testing to determine the safety of recreational waters. But after an Associated Press investigation published last week revealed high counts of viruses directly linked to human sewage in the Olympic waters, the IOC reversed course after being advised by the World Health Organization (WHO) that it should expand its testing.