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OLS Field Name OLS Field Data
Main Title Effects of Ozone, Chlorine Dioxide, Chlorine, and Monochloramine on 'Cryptosporidium parvum' Oocyst Viability.
Author Korich, D. G. ; Mead, J. R. ; Madore, M. S. ; Sinclair, N. A. ; Sterling, C. R. ;
CORP Author Environmental Protection Agency, Cincinnati, OH. Risk Reduction Engineering Lab. ;Arizona Univ., Tucson.
Publisher c1990
Year Published 1990
Report Number EPA/600/J-90/278;
Stock Number PB91-145086
Additional Subjects Ozone ; Chlorine ; Parasitic diseases ; Cryptosporidium ; Giardia ; Potable water ; Disinfection ; Kinetics ; Mice ; Reprints ; Chlorine dioxide ; Monochloramine ; Oocysts
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB91-145086 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/13/1991
Collation 9p
Abstract Purified Cryptosporidium parvum oocysts were exposed to ozone, chlorine dioxide, chlorine, and monochloramine. Excystation and mouse infectivity were comparatively evaluated to assess oocyst viability. Ozone and chlorine dioxide more effectively inactivated oocysts than chlorine and monochloramine did. Greater than 90% inactivation as measured by infectivity was achieved by treating oocysts with 1 ppm of ozone (1 mg/liter) for 5 min. Exposure to 1.3 ppm of chlorine dioxide yielded 90% inactivation after 1 h, while 80 ppm of monochloramine required approximately 90 min. for 90% inactivation. The data indicate that C.parvum oocysts are 30 times more resistant to ozone and 14 times more resistant to chlorine dioxide than Giardia cysts exposed to these disinfectants under the same conditions. With the possible exception of ozone, the use of disinfectants alone should not be expected to inactivate C. parvum oocysts in drinking water. (Copyright (c) 1990, American Society for Microbiology.)
Supplementary Notes Pub. in Jnl of Applied and Environmental Microbiology, v56 n5 p1423-1428, May 90. Prepared in cooperation with Arizona Univ., Tucson.
NTIS Title Notes Journal article.
Title Annotations Reprint: Effects of Ozone, Chlorine Dioxide, Chlorine, and Monochloramine on 'Cryptosporidium parvum' Oocyst Viability.
Category Codes 57N; 57E
NTIS Prices PC A02/MF A01
Primary Description 600/14
Document Type NT
Cataloging Source NTIS/MT
Control Number 109130075
Origin NTIS
Type CAT