Title: Photoreactivation of Bacteria Following UV Disinfection
Abstract: Ultraviolet ( UV) light irradiation is one of the most practical disinfection methods in water treatment systems because it can inactivate bacteria, viruses, bacterial spores and oocysts of protozoa. The germicidal effect of far UV light (UV-C and UV -B; 220 ~320 run) is mainly due to the formation of pyrimidine dimers in the genome DNA. However, some organisms possess mechanisms to repair lesions in the genome induced by UV. Pholoreactivation is a light-dependent DNA repair mechanism and involves an enzyme called photolyase. L. pneumophila performed equivalent photoreactivation after LP and MP UV lamp exposures while photoreactivation of E. coli was significantly repressed after the inactivation by MP UV lamp. It can be concluded that the effect of photoreactivation shoud not be neglected when using UV disinfection in water treatment.
Publication Year: 2006
Publication Date: 2006-01-01
Language: en
Type: article
Access and Citation
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot