September 25, 2002Applied and Environmental Microbiology
Comparative Inactivation of Enteroviruses and Adenovirus 2 by UV Light
Key Points
- Determine the UV irradiation doses needed to achieve inactivation of selected enteric viruses on the U.S. Environmental Protection Agency Contaminant Candidate List.
- Assayed the UV light doses required to achieve a 3-log reduction across six enteric viral targets.
- Evaluated echovirus 1, echovirus 11, coxsackievirus B3, coxsackievirus B5, poliovirus 1, and human adenovirus type 2.
- A 3-log reduction was achieved at doses of 25 mWs/cm² for echovirus 1, 20.5 mWs/cm² for echovirus 11, 24.5 mWs/cm² for coxsackievirus B3, 27 mWs/cm² for coxsackievirus B5, and 23 mWs/cm² for poliovirus 1.
- Human adenovirus type 2 required a dose of 119 mWs/cm² for a 3-log reduction, establishing it as the most UV light-resistant enteric virus reported to date.
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Implication
Laboratory study demonstrates high UV resistance in human adenovirus 2 compared to enteroviruses, indicating greater disinfection requirements for water treatment.
Cite This Study
Gerba et al. (2002) studied this question.