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Detection of free-living amoeba (Acanthamoeba polyphagia) in the air conditioning systems.

Acanthamoeba polyphagia was found in the cooling towers of the air conditioning systems. This finding directs the attention to more studies on water and air conditioning systems of hospitals and dwellings and the relation to outbreaks of legionnaire's disease be caused by Legionella bacilli which complete its natural life cycle inside the Acanthamoeba.