Abstract

Opportunistic premise plumbing pathogens (OPPPs) are environmental, waterborne opportunistic pathogens that are present in drinking water. They include Legionella pneumophila, Pseudomonas aeruginosa, Burkholderia cepacia, Mycobacterium avium complex (MAC), Mycobacterium abscessus complex (MAA), Stenotrophomonas maltophilia, Acinetobacter baumannii, Sphingomonas paucimobilis, Segniliparus spp., Methylobacterium spp., Cupriavidus spp., and the free-living amoebae (e.g., Acanthamoeba and Vermamoeba spp.). As OPPPs are in drinking water, humans continually come in contact with them and become infected. The OPPPs are adapted to premise plumbing; the plumbing in homes, apartments, and hospitals. The presence of OPPP in plumbing is due to a number of shared characteristics, including disinfectant resistance, growth at low organic content, adherence to pipe surfaces, biofilm formation, growth at low oxygen content, and high temperature- and desiccation-tolerance. The presence of OPPPs in drinking water systems challenge current methods for monitoring and ensuring safe drinking water.

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