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Diversity and antibiotic resistance of Acinetobacter spp. in water from the source to the tap.

Artikel i vetenskaplig tidskrift
Författare Carlos Narciso-da-Rocha
Ivone Vaz-Moreira
Liselott Svensson-Stadler
Edward R.B. Moore
Célia M Manaia
Publicerad i Applied Microbiology and Biotechnology
Volym 97
Nummer/häfte 1
Sidor 329-340
ISSN 0175-7598
Publiceringsår 2013
Publicerad vid Institutionen för biomedicin, avdelningen för infektionssjukdomar
Sidor 329-340
Språk en
Länkar dx.doi.org/10.1007/s00253-012-4190-...
https://gup.ub.gu.se/file/96753
Ämnesord Drinking water; Antibiotic resistance; ECOFF; gyrB; recA; rpoB
Ämneskategorier Klinisk medicin

Sammanfattning

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 non-wild type (non-WT), 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. Non-WT 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 suggested.

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