|Description:||Under a magnification of 400X, this photomicrograph reveals numerous Legionella pneumophila bacteria of the Knoxville strain, which were present in a sample of Mueller-Hinton culture medium to which supplements had been added. The sample had been stained using the Knoxville strain conjugate, and viewed using a fluorescent antibody staining method.|
Legionnaires' disease is caused by a type of bacteria called Legionella. The bacteria got its name in 1976, when many people who went to a Philadelphia convention of the American Legion suffered from an outbreak of this disease, a type of pneumonia (lung infection). Although this type of bacteria was around before1976, more illness from Legionnaires' disease is being detected now. This is because we are now looking for this disease whenever a patient has pneumonia.