Authors: Carlos NarcisodaRocha Ivone VazMoreira Liselott SvenssonStadler Edward R B Moore Célia M Manaia
Publish Date: 2012/06/06
Volume: 97, Issue: 1, Pages: 329-340
Abstract
Acinetobacter spp are ubiquitous bacteria in the environment Acinetobacter spp isolated from a municipal drinking water treatment plant and from connected tap water were identified to the species level on the basis of rpoB gene partial sequence analysis Intraspecies variation was assessed based on the analysis of partial sequences of housekeeping genes rpoB gyrB and recA Antibiotic resistance was characterized using the disk diffusion method and isolates were classified as wild or nonwild type nonWT according to the observed phenotype The strains of Acinetobacter spp were related to 11 different validly published species although three groups of isolates presenting low rpoB sequence similarities with previously described species may represent new species Most of the isolates were related to the species A johnsonii and A lwoffii These two groups as well as others related to the species A parvus and A tjernbergiae were detected in the water treatment plant and in tap water Other strains related to the species A pittii and A beijerinckii were isolated only from tap water Most of the isolates 80 demonstrated wild type WT to all of the 12 antibiotics tested NonWT for tetracycline meropenem and ceftazidime among others were observed in water treatment plant or in tap water samples Although in general this study suggests a low prevalence of acquired antibiotic resistance in water Acinetobacter spp the potential of some species to acquire and disseminate resistance via drinking water is suggestedThis study was financed by Fundação para a Ciência e a Tecnologia projects PTDC/AMB/70825/2006 PTDC/AACAMB/113840/2009 and IVM grant SFRH/BD/27978/2006 CNR was supported by ERASMUS placement agreement LSS and ERBM were supported in part by funding of the ALFmedel för forskning Västra Götaland Region project ALFGBG11574 and the FoUVästra Götaland Region project VGFOUREG157801
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