Legionella is a bacterium that lives in water and can cause Legionnaires' disease or Pontiac fever in humans. Pontiac fever causes flu-like symptoms and most people recover quickly. Legionnaire's disease is more severe and can cause flu-like symptoms, but also pneumonia. Treatment is with antibiotics.
Probable and confirmed cases reported.
Sources: Integrated Public Health Information System [2006-2015], extracted October 25, 2016 by Niagara Region Public Health; Population Estimates, IntelliHealth, Ministry of Health and Long-Term Care , extracted September 29, 2016 by Niagara Region Public Health.
Ontario data: Ontario Ministry of Health and Long-Term Care, Integrated Public Health System database, extracted by Public Health Ontario [October 25, 2016].