Seasonal distribution of pathogenic free-living amebae in Oklahoma waters.
Pathogenic free-living amebae cause serious human disease, including infection of the eye and the central nervous system.
The purpose of this study was to sample aquatic environments in the Tulsa, Oklahoma, area year-round for the presence of these disease-causing amebae.
A total of 34 pathogenic isolates were obtained from 2,016 processed water and swab samples.
Pathogenicity was determined by the ability of amebae to cause death in mice after intranasal inoculation.
Pathogenic amebae were isolated during every month of the year and were identified as Naegleria australiensis (38%), Acanthamoeba species (35%), N. fowleri (18%), and leptomyxid amebae (9%). Pathogenic leptomyxids have not previously been reported from the environment.
The greatest percentage of recovery of pathogens occurred during the spring and autumn.
The prevalence of pathogenic free-living amebae in the sampled waters was 1 pathogen/3.4 l water.
Mots-clés Pascal : Répartition géographique, Variation saisonnière, Parasite, Pathogène, Kératite, Encéphalite, Milieu aquatique, Oeil pathologie, Système nerveux pathologie, Oklahoma, Amoebida, Etats Unis, Amérique du Nord, Amérique, Protozoa
Mots-clés Pascal anglais : Geographic distribution, Seasonal variation, Parasite, Pathogenic, Keratitis, Encephalitis, Aquatic environment, Eye disease, Nervous system diseases, Oklahoma, United States, North America, America, Protozoa
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 95-0248268
Code Inist : 002A11B. Création : 01/03/1996.