Influence of the diversity of bacterial isolates from drinking water on resistance of biofilms to disinfection.
Single- and multispecies biofilms formed by six drinking water-isolated bacterial species were used to assess their susceptibilities to sodium hypochlorite (SHC). In general, multispecies biofilms were more resistant to inactivation and removal than single biofilms. Total biofilm inactivation was achieved only for Acinetobacter calcoaceticus single-species biofilms and for those multispecies biofilms without A. calcoaceticus. Biofilms with all bacteria had the highest resistance to SHC, while those without A. calcoaceticus were the most susceptible. A. calcoaceticus formed single biofilms susceptible to SHC; however, its presence in multispecies biofilms increased their resistance to disinfection.
Simões
Lúcia Chaves
LC
IBB (Institute for Biotechnology and Bioengineering), Centre of Biological Engineering, University of Minho, Braga, Portugal. luciachaves@deb.uminho.pt
Simões
Manuel
M
Vieira
Maria João
MJ
D001419:Bacteria / Q000187:drug effects* / Q000254:growth & development; D044822:Biodiversity; D018441:Biofilms / Q000187:drug effects* / Q000254:growth & development; D004202:Disinfectants / Q000494:pharmacology*; D004203:Disinfection; D024881:Drug Resistance, Bacterial; D008826:Microbial Sensitivity Tests; D050296:Microbial Viability / Q000187:drug effects; D012973:Sodium Hypochlorite / Q000494:pharmacology*; D014871:Water Microbiology
D004202:Disinfectants; D012973:Sodium Hypochlorite