[Free-living Amoebae in fresh water. Study of the water supply of the town of Poitiers (France) (author's transl)].

46 out of 76 samples of water originating from the water supply of the town of Poitiers, and concerning each stage of it, were found positive to free-living amoebae. 3/4 of the isolated strains belonged to the genus Acanthamoeba only 2 to the genus Naegleria, and the remaining to the genus Hartmanella. All the strains are insensible to 5-Fluoro-cytosin and Amphotericin B at concentrations compatible with human use. No experimental pathogen power could be demonstrated by inoculation to laboratory mice.