Evolutionary Roots and Diversification of the Genus .

Despite the importance of diversification rates in the study of prokaryote evolution, they have not been quantitatively assessed for the majority of microorganism taxa. The investigation of evolutionary patterns in prokaryotes constitutes a challenge due to a very scarce fossil record, limited morphological differentiation and frequently complex taxonomic relationships, which make even species recognition difficult. Although the speciation models and speciation rates in eukaryotes have traditionally been established by analyzing the fossil record data, this is frequently incomplete, and not always available.

Direct evidence of recombination in the recA gene of Aeromonas bestiarum.

Two hundred and twenty-one strains representative of all Aeromonas species were characterized using the recA gene sequence, assessing its potential as a molecular marker for the genus Aeromonas. The inter-species distance values obtained demonstrated that recA has a high discriminatory power. Phylogenetic analysis, based on full-length gene nucleotide sequences, revealed a robust topology with clearly separated clusters for each species.

Potential pathogenicity of Aeromonas hydrophila complex strains isolated from clinical, food, and environmental sources.

Aeromonas are autochthonous inhabitants of aquatic environments, including chlorinated and polluted waters, although they can also be isolated from a wide variety of environmental and clinical sources. They cause infections in vertebrates and invertebrates and are considered to be an emerging pathogen in humans, producing intestinal and extra-intestinal diseases. Most of the clinical isolates correspond to A.

Draft Genome Sequence of the Aeromonas diversa Type Strain.

We present here the first genome sequence of the Aeromonas diversa type strain (CECT 4254(T)). This strain was isolated from the leg wound of a patient in New Orleans (Louisiana) and was originally described as enteric group 501 and distinguished from A. schubertii by DNA-DNA hybridization and phenotypical characterization.

Draft Genome Sequence of Aeromonas molluscorum Strain 848TT, Isolated from Bivalve Molluscs.

We report here the draft genome sequence of Aeromonas molluscorum 848T, the type strain of this Aeromonas species, which was isolated from wedge shells (Donax trunculus) obtained from a retail market in Barcelona, Spain, in 1997.

Reclassification of Aeromonas hydrophila subspecies anaerogenes.

Technological advances together with the continuous description of new taxa have led to frequent reclassifications in bacterial taxonomy. In this study, an extensive bibliographic revision, as well as a sequence analysis of nine housekeeping genes (cpn60, dnaJ, dnaX, gyrA, gyrB, mdh, recA, rpoB and rpoD) and a phenotypic identification of Aeromonas hydrophila subspecies anaerogenes were performed. All data obtained from previous physiological, phylogenetic, and DNA-DNA hybridization studies together with those presented in this study suggested that A.