In vitro susceptibilities of Aeromonas genomic species to 69 antimicrobialagents

A total of 217 strains representing ail 14 currently described genomic spec ies in the genus Aeromonas were tested for susceptibility to 69 antimicrobi al agents by a microdilution method. All species were susceptible to tetrac yclines, quinolones, chloramphenicol, and most of the aminoglycosides and t he cephalosporins, but were resistant to lincosamides, vancomycin, teicopla nin and some penicillins. In general, no signicant differences were found t hat correlated with the taxonomic designation or the origin of the isolates tested. The microdilution method proved to be easy to perform allowing sus ceptibility testing of extensive strain collections for a large number of a ntimicrobial agents.