Pathogenic and non-pathogenic free-living amoebae from an activated-sludge plant were investigated.
The greatest species diversity occurred in the raw, settled sewage and at the beginning of the aeration tank, whilst the lowest number of species occurred in the final sedimentation tanks.
Thirteen species of free-living amoebae representing eleven genera were isolated; these included three species of Acanthamoeba (A. castellanii, A. culbertsoni and A. palyphaga), all of wich were pathogenic to mice with varying degrees of virulence.
The implications for the public health risk of the presence of pathogenic free-living amoebae in activated-sludge plants are discussed.
Mots-clés Pascal : Epuration eau usée, Enumération, Toxicité, Analyse risque, Survie, Multiplication microorganisme, Boue activée, Station épuration, Acanthamoeba culbertsoni, Forme libre, Décanteur, Bassin aération, acanthamoeba polyphaga, Rhizoflagellata, Protozoa, Pathogène, Epuration biologique
Mots-clés Pascal anglais : Waste water purification, Enumeration, Toxicity, Risk analysis, Survival, Microorganism growth, Activated sludge, Sewage treatment plant, Acanthamoeba culbertsoni, Free form, Sedimentation tank, Aeration tank, Rhizoflagellata, Protozoa, Pathogenic, Biological purification
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Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 94-0063011
Code Inist : 002A31D07A. Création : 199406.