Abstract
Abstract
UV doses were applied to water samples containing Acinetobacter baumannii using a low-pressure UV collimated beam device. This produced a UV dose–response profile for A. baumannii from which the UV doses that are required for various levels of log inactivation of A. baumannii were interpolated. A UV dose of 1.8 mJ · cm−2 achieved 2-log (99%) inactivation, 3.3 mJ · cm−2 achieved 3-log (99.9%) inactivation, and 4.8 mJ · cm−2 achieved 4-log (99.99%) inactivation. The UV dose–response of A. baumannii is similar to the previously reported dose–response profiles of other waterborne bacteria such as Escherichia coli O157:H7 and protozoan pathogens such as Cryptosporidium parvum. The results of this study suggest that UV disinfection can be an effective control strategy for A. baumannii. Point-of-use UV disinfection (i.e., at the tap) may therefore be a candidate technology to reduce the risk of infection of immunocompromised individuals from exposure to water containing A. baumannii.
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