Bacteria that cause Legionnaires' disease have been found in a Yankee Stadium cooling tower in New York City. Health officials say it's one of 10 towers that tested positive for Legionella bacteria amid 10 recent cases of the disease in the Bronx, including one death. The city Health Department said Sunday that more tests are being conducted to determine if the bacteria are live. Only live bacteria can cause Legionnaires' disease. The Yankees say none of the current cases has been linked to the stadium and the stadium cooling tower was cleaned Sunday. Legionnaires' disease is a form of pneumonia and is treatable, but can be fatal.