Record Display for the EPA National Library Catalog

RECORD NUMBER: 19 OF 28

OLS Field Name OLS Field Data
Main Title Novel Method for Studying the Public Health Significance of Macroinvertebrates Occurring in Potable Water.
Author Levy, R. V. ; Cheetham, R. D. ; Davis, J. ; Winer, G. ; Hart, F. L. ;
CORP Author Worcester Polytechnic Inst., MA.;Environmental Protection Agency, Cincinnati, OH. Water Engineering Research Lab..
Year Published 1984
Report Number EPA/600/J-84/323;
Stock Number PB85-236073
Additional Subjects Invertebrates ; Potable water ; Disinfection ; Escherichia coli ; Enterobacteriaceae ; Crustacea ; Removal ; Chlorine ; Populations ; Responses ; Public health ; Water distribution ; Distribution systems ; Reprints ; Macroinvertbrates ; Hyalella azteca
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB85-236073 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/21/1988
Collation 7p
Abstract
An experimental procedure was developed to study the association of selected bacteria and macroinvertebrates and their response to free available chlorine disinfection. The organisms selected for study were Escherichia coli (LacZ545), Enterobactercloacae (ATCC 23355), and the amphipod Hyalella azteca. E. coli was shown to bind tightly (16,000 CFU per amphipod) to the macroinvertebrate and to resist repeated attempts to wash it off. E. cloace was shown to bind much less tightly (1,400 CFU per amphipod) to H. azteca and was less resistant to removal by washing. The extent of association is a function of macroinvertebrate size (surface area), but the procedure produces repeatable results usable for controlled experimentation. The method, together with the dual bacterial identification criteria (morphology and antibiotic resistance), was used to study the response of unassociated and associated E. coli and E. cloacae to disinfection with free available chlorine at 1.0 mg/liter. (Copyright (c) 1984, American Society for Microbiology.)