1976 Philadelphia Legionnaires' disease outbreak 1976 Philadelphia Legionnaires' disease outbreak The 1976 Legionnaires disease outbreak, occurring in the late summer in Philadelphia, Pennsylvania, was the first occasion in which a cluster of a particular type of pneumonia cases were determined to be caused by the "Legionella pneumophila" bacteria. Previous outbreaks were retroactively diagnosed as being most probably caused by Legionella bacteria. On July 21, 1976, the American Legion opened its annual three-day convention at the Bellevue-Stratford Hotel in Philadelphia, Pennsylvania. More than 2,000 Legionnaires, mostly men, attended the convention. The date and city were chosen to coincide with America’s celebration of the 200th anniversary of
American Legion Veterans of the Korean War were approved for membership in The American Legion in 1950, and The American Legion Child Welfare Foundation was formed in 1954. On May 30, 1969, the Cabin John Bridge, which carried the Capital Beltway (I-495) across the Potomac River northwest of Washington, was officially renamed to the "American Legion Memorial Bridge" in a ceremony led by Lt. Gen. Lewis B. Hershey, director of the U.S. Selective Service System. In 1976, an outbreak of bacterial pneumonia occurred in a convention of The American Legion at the Bellevue Stratford Hotel in Philadelphia. This pneumonia killed 34 people