Legionnaires' disease showed that Legionnaires' disease was responsible and the immediate epidemiological investigation traced the source of the infection to the air-conditioning cooling tower on the roof of Stafford District Hospital. In March 1999, a large outbreak in the Netherlands occurred during the Westfriese Flora flower exhibition in Bovenkarspel; 318 people became ill and at least 32 people died. This was the second-deadliest outbreak since the 1976 outbreak and possibly the deadliest, as several people were buried before Legionnaires' disease had been diagnosed. The world's largest outbreak of Legionnaires' disease happened in July 2001 with people appearing at the hospital on July
Legionella clemsonensis yellow. Legionella clemsonensis Legionella clemsonensis was isolated in 2006, but was discovered in 2016 by Clemson University researchers. It is a Gram-negative bacterium. “"Legionella"” is named after the American Legion convention where the first outbreak occurred, killing 34 people and sickening 221 individuals in 1976. It occurred in Philadelphia during the convention for the association of the U.S. veterans. The specific name "clemsonensis"” derives from Clemson University, where undergraduates DNA-sequenced this new strain. "Legionella" has a correlation with another genus called "Coxiella". Both cause lung infection that can eventually lead to pneumonia due to the intracellular bacteria in aerosols. Based