Antibiotic resistance of enterococci and related bacteria in an urban wastewater treatment plant

• Tipo: Artigo em Revista Científica Internacional
• Data: 2006

Autores

da Silva, MF (Autor) Outra; Tiago, I (Autor) Outra; Verissimo, A (Autor) Outra; Rui Boaventura (Autor) FEUP; Olga C Nunes (Autor) FEUP; Manaia, CM (Autor) Outra

Revista

Título: FEMS Microbiology Ecology

Vol. 55 Nº 2

Páginas: 322-329

ISSN: 0168-6496

Editora: Oxford University Press

Indexação

ISI Web of Knowledge - 126 Citações

ISI Web of Science

Scopus - 170 Citações

Classificação Científica

CORDIS: Ciências Naturais

FOS: Ciências exactas e naturais > Ciências biológicas

Outras Informações

ID Authenticus: P-004-NDP

DOI: 10.1111/j.1574-6941.2005.00032.x

Abstract (EN): The main objective of this work was to study the ecology of enterococci and related bacteria in raw and treated wastewater from a treatment plant receiving domestic and pretreated industrial effluents in order to assess the influence of treatment on the prevalence of antibiotic resistance phenotypes among this group of bacteria. The predominant species found in the raw wastewater were Entercoccus hirae, Entercoccus faecium and Entercoccus faecalis. Wastewater treatment led to a reduction in E. hirae (alpha < 0.1) and an increase in E. faecium (alpha < 0.1); the relative proportions of E. faecalis remained the same in the raw and in the treated wastewater. Among the isolates tested, no vancomycin resistance was observed among the enterococci. Entercoccus faecium and E. faecalis showed resistance prevalence values reaching 33%, 40% and 57% for the antibiotics ciprofloxacin, erythromycin and tetracycline, respectively. Antibiotic-resistant strains of enterococci were not eliminated by wastewater treatment. A positive selection of ciprofloxacin-resistant enterococci was indicated by a significant increase in resistance prevalence (alpha < 0.02) in treated wastewater compared with the raw wastewater.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8