Legionnaires’ disease is caused by Legionella bacteria. It is a potentially fatal respiratory disease characterised by severe pneumonia. At least 50 species and 70 strains (serotypes) of Legionella bacteria have been identified. Over 90% of Legionnaires’ disease cases are caused by Legionella pneumophila. The first recorded outbreak of Legionnaires’ disease was in 1976 in Philadelphia, […]