logo BDSP

Base documentaire


  1. Crypto and Giardia in US groundwater.

    Article - En anglais

    Data generated from the detection of Cryptosporidium oocysts and Giardia cysts in 463 groundwater samples were compiled.

    Samples were taken from 199 sites in 23 of the 48 contiguous states.

    The groundwater sources were vertical wells, springs, infiltration galleries, and horizontal wells.

    Samples were analyzed using an immunofluorescence technique.

    Inclusion of data from all sources showed that 12 percent of the sites were positive for Cryptosporidium or Giardia or both.

    Cryptosporidium oocysts were found in 5 percent of the vertical wells, 20 percent of the springs, 50 percent of the infiltration galleries, and 45 percent of the horizontal wells.

    Giardia cysts were found in 1 percent of the vertical wells, 14 percent of the springs, 25 percent of the infiltration galleries, and 36 percent of the horizontal wells.

    These data suggest that springs are at a higher risk for contamination than vertical wells.

    Because pathogens occur frequently in infiltration galleries and horizontal wells, these sources warrant further study.

    Mots-clés Pascal : Pollution eau, Eau souterraine, Etats Unis, Amérique du Nord, Amérique, Eau potable, Résultat mesure, Qualité eau, Oocyste, Kyste, Cryptosporidium, Apicomplexa, Protozoa, Giardia

    Mots-clés Pascal anglais : Water pollution, Ground water, United States, North America, America, Drinking water, Measurement result, Water quality, Oocyst, Cyst, Cryptosporidium, Apicomplexa, Protozoa

    Logo du centre Notice produite par :
    Inist-CNRS - Institut de l'Information Scientifique et Technique

    Cote : 98-0200728

    Code Inist : 001D16A04B. Création : 11/09/1998.