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Occurrence and diversity of integrons and beta-lactamase genes among ampicillin-resistant isolates from estuarine waters.
TLDR
Assessment of beta-lactamase genes and integrons among Gram-negative ampicillin-resistant bacteria from Ria de Aveiro reinforces the hypothesis that cultivation-dependent approaches may underestimate the prevalence of antibiotic resistance genes in environmental samples and may introduce bias in the recovery of their molecular variants.
Prevalence and characterization of integrons from bacteria isolated from a slaughterhouse wastewater treatment plant.
TLDR
The hypothesis that WWTPs constitute a potential hot spot for horizontal gene transfer and for selection of antimicrobial resistance genes among aquatic bacteria is supported.
INTEGRALL: a database and search engine for integrons, integrases and gene cassettes
TLDR
The current release (1.2) contains more than 4800 integron sequences and provides a public genetic repository for sequence data and nomenclature, offering scientists an easy and interactive access to integron's DNA sequences, their molecular arrangements as well as their genetic contexts.
Wavelength dependence of biological damage induced by UV radiation on bacteria
TLDR
Analysis of biological effects of UV radiation of different wavelengths revealed that survival under UVA, UVB and UVC wavelengths was best explained by DSB, oxidative damage to lipids, and intracellular ROS levels, respectively.
Wastewater bacterial communities bring together broad-host range plasmids, integrons and a wide diversity of uncharacterized gene cassettes.
TLDR
According to the results, wastewater environments promote the development of bacterial communities that support and bring together different types of molecular elements that, in association, play a major role in bacterial adaptation and evolution.
Resistance to Broad-Spectrum Antibiotics in Aquatic Systems: Anthropogenic Activities Modulate the Dissemination of bla CTX-M-Like Genes
TLDR
The results demonstrate that the occurrence and diversity of bla CTX-M genes are clearly different between polluted and unpolluted lotic ecosystems; these findings favor the hypothesis that natural environments are reservoirs of resistant bacteria and resistance genes.
Seasonal and spatial variability of free-living bacterial community composition along an estuarine gradient (Ria de Aveiro, Portugal)
TLDR
Analysis of DGGE profiles indicated that the compositional shifts within this community occurred between the brackish and freshwater sections, and salinity and temperature accounted for a significant amount of the variability in the bacterioplankton community composition.
Evaluation of amplified ribosomal DNA restriction analysis as a method for the identification of Botryosphaeria species.
TLDR
The method described in this paper provides a simple and rapid procedure for the differentiation and identification of Botryosphaeria isolates at the species level.
Genetic diversity and antimicrobial resistance of Escherichia coli from Tagus estuary (Portugal).
TLDR
A high prevalence of antibiotic resistance among E. coli circulating in the Tagus estuary is demonstrated with emphasis on the occurrence of resistance to last-resort antibiotics and on the high incidence of multiresistance.
Characterization of antibiotic resistant and pathogenic Escherichia coli in irrigation water and vegetables in household farms.
TLDR
Several risk factors in E. coli isolates from vegetables and irrigation water are identified, raising health concerns and results suggest that irrigation groundwater constitutes a source ofE.
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