Sources of Infection
Sources of infection can be anywhere there is water either being brought in from another part of the building or left sitting. Showers, faucets, plumbing systems, and hot water tanks can all be carrying Legionella.
Another potential danger comes from cooling towers, which is an ac unit for large buildings. The water particles they release could be pumping Legionella into the air like an aerosol. Although this is a less common method of transmission, it has the potential to threaten a larger area, as well as cross over into the water systems of neighboring buildings.
Any standing water that’s not drained regularly may also be a source of infection. This includes decorative fountains, hot tubs, and pools.
Additionally, another source of infection that’s less common but may lead to a higher incidence of infection is drinking water. Consuming infected water may lead to infection through aspiration, which in the inhaling of foreign substances from the mouth into the windpipe. While this often leads to an automatic choking reflex, it can happen without your knowledge.
Fortunately, there is no documented case of Legionella being transmitted from person to person.