Identification error of Aeromonas aquariorum: a causative agent of septicemia.

A genetic reidentification of 7 Aeromonas blood isolates revealed that phenotype-based identification systems misidentified 5 (71.4%) isolates. In Aeromonas strains, A. aquariorum was the most common misidentified organism and showed the most potent cytotoxic activities against human blood cell lines, suggesting that the correct identification of A. aquariorum is important.