Table 2: The Biochemical Identification of Motile Aeromonas species.

CharacteristicA. hydrophilaA. bestariumA. caviaeA. mediaA. eucrenophilaA. sobriaA. veronii biovar sobriaA. jandaeiA. veroni biovar veroniA. schubertiiA. trotaA. allosaccharophilaA. encheleiaA. popoffii

Hybridization groupHG-1HG-2HG-4HG-5HG-6HG-7HG-8HG-9HG-10HG-12HG-14HG-15HG-16HG-17
Esculin hydrolysis++++++d+
Gas from glucose+++++++++++
Voges-Proskauer+++ weak+++d+
Indol+++d++++++++d
Pyrazinzmidase++d+ndndndnd
L-arabinosed++++dnd
D-mannitol+++++++++++++
Sucrose++++d+++++
Lysine decarboxylase++ weak++++++
Ornithine decarboxylase+d
Arginine dihydrolase+++++++++dd+
Arbutin hydrolysis+++++nd+ndnd
H2S production+++nd++++ndndnd
Hemolysis++d+++++ndnd
Ampicillin 10 μgRRRndndSRRRRSndRnd
Carbenicillin 30 μgRRRndndSRRRRSndRnd
Cephalothin 30 μgRRRdSSSSDSRndndnd
Colistin 4 μg/mLddSSSndSRSSSndndnd

HG: hybridization group; +: >75% of strains positive; d: 26–74% of strains positive; −: <25% of strains are positive; nd: not determined; R: resistant; S: sensitive.
Source: Carnahan and Joseph [7].