Journal article
Inactivation of Enteric Adenovirus and Feline Calicivirus by Chlorine Dioxide
Applied and environmental microbiology, v 71(6), pp 3100-3105
Jun 2005
PMID: 15933007
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Chlorine dioxide (ClO
2
) 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 ClO
2
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 ClO
2
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.
Metrics
Details
- Title
- Inactivation of Enteric Adenovirus and Feline Calicivirus by Chlorine Dioxide
- Creators
- Jeanette A Thurston-Enriquez - U.S. Department of Agriculture-Agricultural Research Service, 120 Keim Hall, University of Nebraska East Campus, Lincoln, Nebraska 68583-0934Charles N Haas - U.S. Department of Agriculture-Agricultural Research Service, 120 Keim Hall, University of Nebraska East Campus, Lincoln, Nebraska 68583-0934Joseph Jacangelo - U.S. Department of Agriculture-Agricultural Research Service, 120 Keim Hall, University of Nebraska East Campus, Lincoln, Nebraska 68583-0934Charles P Gerba - U.S. Department of Agriculture-Agricultural Research Service, 120 Keim Hall, University of Nebraska East Campus, Lincoln, Nebraska 68583-0934
- Publication Details
- Applied and environmental microbiology, v 71(6), pp 3100-3105
- Publisher
- American Society for Microbiology
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Civil, Architectural, and Environmental Engineering
- Web of Science ID
- WOS:000229790900037
- Scopus ID
- 2-s2.0-20444386169
- Other Identifier
- 991014878123204721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Biotechnology & Applied Microbiology
- Microbiology