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RECORD NUMBER: 6 OF 6

OLS Field Name OLS Field Data
Main Title Inactivation of Gerbil-Cultured 'Giardia lamblia' Cysts by Free Chlorine.
Author Rubin, A. J. ; Evers, D. P. ; Eyman, C. M. ; Jarroll., E. L. ;
CORP Author Ohio State Univ., Columbus. Water Resources Center. ;Cleveland State Univ., OH. Dept. of Biology.;Environmental Protection Agency, Cincinnati, OH. Risk Reduction Engineering Lab.
Publisher c1989
Year Published 1989
Report Number EPA/600/J-89/420;
Stock Number PB90-245754
Additional Subjects Giardia ; Chlorine ; Parasitology ; Cysts ; pH ; Alkalinity ; Cultures(Biology) ; Reprints ; Gerbillinae ; Animal disease models ; Cell survival
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB90-245754 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 12/03/1990
Collation 5p
Abstract
Giardia lamblia cysts were harvested from Mongolian gerbils and exposed to free chlorine in buffered water at pH 5, 7, and 9 at 15 C. The contact times required to obtained a 2-log reduction in cyst survival (i.e., a 99% kill) were interpolated from survival curves generated at fixed concentrations of chlorine in the range of 0.25 to about 16 mg/liter. Concentration-time (C times t') products for 99% inactivation ranged for about 120 to nearly 1,500 mg times min/liter. These values are higher than those reported previously for free chlorine using G. lamblia cysts from infected humans. The cysts isolated from gerbils, as with other Giardia cysts, were unusually sensitive to chlorine in alkaline solutions. (Copyright (c) 1989, American Society for Microbiology.)