NDLI: Inactivation of Enteric Adenovirus and Feline Calicivirus by Chlorine Dioxide

Content Provider	PubMed Central
Author	Thurston-enriquez, Jeanette A. Haas, Charles N. Joseph, Jacangelo Gerba, Charles P.
Copyright Year	2005
Abstract	Chlorine dioxide (ClO2) inactivation experiments were conducted with adenovirus type 40 (AD40) and feline calicivirus (FCV). Experiments were carried out in buffered, disinfectant demand-free water under high- and low-pH and -temperature conditions. Ct values (the concentration of ClO2 multiplied by contact time with the virus) were calculated directly from bench-scale experiments and from application of the efficiency factor Hom (EFH) model. AD40 Ct ranges for 4-log inactivation (Ct 99.99%) at 5°C were >0.77 to <1.53 mg/liter × min and >0.80 to <1.59 mg/liter × min for pH 6 and 8, respectively. For 15°C AD40 experiments, >0.49 to <0.74 mg/liter × min and <0.12 mg/liter × min Ct 99.99% ranges were observed for pH 6 and 8, respectively. FCV Ct 99.99% ranges for 5°C experiments were >20.20 to <30.30 mg/liter × min and >0.68 mg/liter × min for pH 6 and 8, respectively. For 15°C FCV experiments, Ct 99.99% ranges were >4.20 to <6.72 and <0.18 mg/liter × min for pH 6 and 8, respectively. Viral inactivation was higher at pH 8 than at pH 6 and at 15°C than at 5°C. Comparison of Ct values and inactivation curves demonstrated that the EFH model described bench-scale experiment data very well. Observed bench-scale Ct 99.99% ranges and EFH model Ct 99.99% values demonstrated that FCV is more resistant to ClO2 than AD40 for the conditions studied. U.S. Environmental Protection Agency guidance manual Ct 99.99% values are higher than Ct 99.99% values calculated from bench-scale experiments and from EFH model application.
Related Links	http://dx.doi.org/10.1128/AEM.71.6.3100-3105.2005
Starting Page	3100
File Format	PDF
ISSN	10985336
e-ISSN	10985336
Journal	Applied and Environmental Microbiology
Issue Number	6
Volume Number	71
Language	English
Publisher	American Society for Microbiology
Publisher Date	2005-06-01
Access Restriction	Open
Rights Holder	American Society for Microbiology
Subject Keyword	Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Ecology Food Science Applied Microbiology and Biotechnology Biotechnology

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