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. hydrophila subspecies anaerogenes belonged to the species Aeromonas caviae rather than A. hydrophila. Therefore, the inclusion of A. hydrophila subsp. anaerogenes in the species A. caviae is proposed.