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A biofilm model developed to investigate survival and disinfection of Mycobacterium mucogenicum in potable water. | LitMetric

AI Article Synopsis

Article Abstract

Water in healthcare environments can be a source for healthcare-associated infections (HAI). However, information on the exposure risk to opportunistic pathogens in potable water distribution systems (PWDS) is lacking. Laboratory studies characterizing the interaction of opportunistic pathogens with biofilms are needed to understand their role in water systems within healthcare facilities. A stable, repeatable, PWDS multi-species biofilm model comprising Sphingomonas paucimobilis, Methylobacterium sp., Delftia acidovorans, and Mycobacterium mucogenicum was developed in the CDC Biofilm Reactor (CBR), reaching 6 log(10) CFU cm(-2) within 6 days. The model was used to investigate the interaction of the opportunistic pathogen M. mucogenicum with the other species, and to determine the efficacy of monochloramine (NH(2)Cl) as a disinfectant against 2-week-old biofilms. Addition of 1 or 2 mg l(-1) NH(2)Cl resulted in the same or an increased log density of viable M. mucogenicum in the biofilm while inactivating some of the Proteobacteria. Although M. mucogenicum preferentially resided in the biofilm, NH(2)Cl exposure caused release of viable M. mucogenicum from the biofilm into the water. Additional studies with this model should determine if sodium hypochlorite has a comparative effect and if other nontuberculous mycobacteria (NTM) respond to NH(2)Cl similarly.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10840417PMC
http://dx.doi.org/10.1080/08927014.2012.735231DOI Listing

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