Inactivation of Naegleria fowleri amoebas by copper:silver and chlorine

Persistent Link:
http://hdl.handle.net/10150/278172
Title:
Inactivation of Naegleria fowleri amoebas by copper:silver and chlorine
Author:
Cassells, Janet Marie, 1957-
Issue Date:
1990
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
Electrolytically generated copper and silver ions (400:40 and 800:80 μg/L) with and without chlorine (1 mg/L) were evaluated for their efficacy in reducing numbers of viable Naegleria fowleri amoebas in well water (23-25°C and pH 7.3). A 99.9% reduction was achieved by 10 minutes exposure to 1 mg/L free chlorine compared to 8 minutes with chlorine combined with copper:silver (800:80 μg/L). Copper:silver alone showed minimal reduction of N. fowleri after 72 hours exposure. Addition of 1 mg/L free chlorine to copper:silver at concentrations of 400:40 or 800:80 μg/L resulted in significantly enhanced inactivation rates (k = 0.4575 and 0.515 log₁₀ reduction/minute, respectively) than with chlorine alone (k = 0.33). Enhanced inactivation of N. fowleri with combined copper:silver and chlorine may be a consequence of multiple sites of attack on the amoeba membrane by the different disinfectants.
Type:
text; Thesis-Reproduction (electronic)
Keywords:
Biology, Microbiology.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Graduate College
Degree Grantor:
University of Arizona
Advisor:
Gerba, Charles P.

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleInactivation of Naegleria fowleri amoebas by copper:silver and chlorineen_US
dc.creatorCassells, Janet Marie, 1957-en_US
dc.contributor.authorCassells, Janet Marie, 1957-en_US
dc.date.issued1990en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractElectrolytically generated copper and silver ions (400:40 and 800:80 μg/L) with and without chlorine (1 mg/L) were evaluated for their efficacy in reducing numbers of viable Naegleria fowleri amoebas in well water (23-25°C and pH 7.3). A 99.9% reduction was achieved by 10 minutes exposure to 1 mg/L free chlorine compared to 8 minutes with chlorine combined with copper:silver (800:80 μg/L). Copper:silver alone showed minimal reduction of N. fowleri after 72 hours exposure. Addition of 1 mg/L free chlorine to copper:silver at concentrations of 400:40 or 800:80 μg/L resulted in significantly enhanced inactivation rates (k = 0.4575 and 0.515 log₁₀ reduction/minute, respectively) than with chlorine alone (k = 0.33). Enhanced inactivation of N. fowleri with combined copper:silver and chlorine may be a consequence of multiple sites of attack on the amoeba membrane by the different disinfectants.en_US
dc.typetexten_US
dc.typeThesis-Reproduction (electronic)en_US
dc.subjectBiology, Microbiology.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorGerba, Charles P.en_US
dc.identifier.proquest1342001en_US
dc.identifier.bibrecord.b26475261en_US
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