Population dynamics and antimicrobial susceptibility of Aeromonas spp. along a salinity gradient in an urban estuary in Northeastern Brazil

MARINE POLLUTION BULLETIN

卷:89

Article

Silva, Camila Magalhaes¹  Evangelista-Barreto, Norma Suely³  Silva dos Fernandes Vieira, Regine Helena²  Mendonca, Kamila Vieira²  de Sousa, Oscarina Viana² 

[1] Univ Fed Ceara, Posgrad Program Engn Fish, BR-60021970 Fortaleza, CE, Brazil

[2] Inst Marine Sci, BR-60165081 Fortaleza, CE, Brazil

[3] Fed Univ Reconcavo Baiano, CCAAB Ctr Res Fisheries & Aquaculture NEPA, BR-44380000 Cruz Das Alms, BA, Brazil

关键词: Aeromonas;    Aquatic environments;    Physicochemical parameters;    Plasmid curing;    Resistance;    Health risks;   

DOI  :  10.1016/j.marpolbul.2014.10.031

来源: Elsevier

【 摘 要 】

The main objective of this study was to quantify population and identify culturable species of Aeromonas in sediment and surface water collected along a salinity gradient in an urban estuary in Northeastern Brazil. Thirty sediment samples and 30 water samples were collected from 3 sampling locations (A, B and C) between October 2007 and April 2008. The Aeromonas count was 10-7050 CFU/mL (A), 25-38,500 CFU/mL (B) and <10 CFU/mL (C) for water samples, and similar to 100-37,500 CFU/g (A), 1200-43,500 CFU/g (B) and <10 CFU/g (C) for sediment samples. Five species (Aeromonas caviae, A. sobria, A. trota, A. salmonicida and A. allosaccharophila) were identified among 41 isolates. All strains were sensitive to chloramphenicol and ceftriaxone, whereas 33 (80, 4%) strains were resistant to at least 2 of the 9 antibiotics tested. Resistance to erythromycin was mostly plasmidial. In conclusion, due to pollution, the Coco River is contaminated by pathogenic strains of Aeromonas spp. with a high incidence of antibacterial resistance, posing a serious risk to human health. (C) 2014 Elsevier Ltd. All rights reserved.

【 授权许可】

Free