Main Title |
Identification of 'Cryptosporidium' Oocysts in River Water. |
Author |
Ongerth, J. E. ;
Stibbs, H. H. ;
|
CORP Author |
Washington Univ., Seattle.;Health Effects Research Lab., Research Triangle Park, NC. |
Year Published |
1987 |
Report Number |
EPA/600/J-87/073; |
Stock Number |
PB88-104161 |
Additional Subjects |
Protozoa ;
Rivers ;
Water pollution ;
Sampling ;
Particles ;
Identifying ;
Diseases vectors ;
Humans ;
Animals ;
Parasites ;
Chemical analysis ;
Spatial distribution ;
Washington(State) ;
California ;
Reprints ;
Cryptosporidium ;
Water borne diseases
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB88-104161 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
7p |
Abstract |
Water samples were collected from four rivers in Washington State and two rivers in California and examined for the presence of Cryptosporidium oocysts. Oocyst-sized particles were concentrated from 20-liter samples of water by membrane filtration, centrifugation, and differential sedimentation. The particle concentrate was then deposited on a 25-mm-diameter membrane filter for oocyst identification by indirect immunofluorescence assay. The identification procedure had a limit of detection of about five oocysts per liter. Cryptosporidium oocysts were found in each of 11 river water samples examined. Concentrations ranged from 2 to 112 oocysts per liter. The finding of Cryptosporidium oocysts in all samples examined from six western rivers is noteworthy in light of recent reports indicating that Cryptosporidium sp. is a significant agent of human and animal disease. This finding suggests that waterborne oocysts of this parasite are more important than was previously recognized. (Copyright (c) 1987, American Society for Microbiology.) |