History of Legionella

Legionnaires’ disease was first identified following a large outbreak of
pneumonia among people who attended an American Legion Convention
in Philadelphia in 1976. A previously unrecognised bacterium was isolated
from lung tissue samples which was subsequently named Legionella
pneumophila.

legionellaOn average there are approximately 200-250 reported cases of Legionnaires disease each year in the United Kingdom (UK). It is thought, however, that the the total number of cases of the disease may be generally underestimated.

Experience has shown that cooling towers, evaporative condensers and hot
and cold water systems in a wide variety of workplaces present a risk of exposure to legionella bacteria.