Aeromonas and Pseudomonas Species Carriers of ampC FOX Genes in Aquatic Environments

Relation between Resistance to Antipseudomonal β-Lactams and ampC and mexC Genes of Pseudomonas aeruginosa

Background: In order to select a better antibiotic choice for treatment of Pseudomonas aeruginosa infections, this study was conducted to determine the frequency of resistance to some antipseudomonal β-lactams in P. aeruginosa isolates from patients in Tehran, Iran. In addition, the relation between presence of genes known to be responsible for resist...

Phenotypic and genotypic identification of Aeromonas species from aquatic environment

A total of 50 strains of Aeromonas spp. were isolated from 50 water and fish samples, and identified biochemically and genetically. Biochemical characterization indicated that 20 out of 50 aeromonads were A. veronii, 19 were A. caviae, 9 were A. hydrophila and 2 were A. trota. Molecular identification of isolated aeromonads revealed restriction profile of four species i.e. A. sobria, A. media, ...

Genetic variability among ampC genes from acinetobacter genomic species 3.

As a part of a nationwide study in Spain, 15 clinical isolates of Acinetobacter genomic species 3 (AG3) were analyzed. The main objective of the study was to characterize the ampC genes from these isolates and to determine their involvement in beta-lactam resistance in AG3. The 15 AG3 isolates showed different profiles of resistance to ampicillin (range of MICs, 12 to >256 microg/ml). Nucleotid...

Microbiological transformations of mercury species in aquatic environments

Biogeochemical cycle of mercury (Hg) is a complicated series of biotic and abiotic reactions, from which formation of monomethylmercury (MeHg) is widely considered as the most important, due to the proven toxicity of MeHg [1]. Organomercury forms have a pronounced capability of bioaccumulation (incorporation in cells and tissues of living organisms) and biomagnification (transport through troph...

Evolutionary ecology of species ranges in aquatic environments.