Table 3.
Detection of putative virulence factors from Aeromonas spp.
| Isolated Aeromonas | Number of strains (%) | β-Hemolysis (sheep) | Protease (skim milk) | Gelatinase (gelatin) | Lipase (corn oil) | Esterase (Tween 80) | DNase |
|---|---|---|---|---|---|---|---|
| A. hydrophila | 24 (100) | 24 (100) | 24 (100) | 24 (100) | 24 (100) | 24 (100) | 24 (100) |
| A. hydrophila likea | 5 (100) | 3 (60.0) | 5 (100) | 5 (100) | 5 (100) | 5 (100) | 5 (100) |
| A. caviae | 7 (100) | 2 (28.6) | 7 (100) | 7 (100) | 7 (100) | 7 (100) | 7 (100) |
| A. caviae likeb | 10 (100) | 1 (10.0) | 10 (100) | 10 (100) | 10 (100) | 10 (100) | 10 (100) |
| A. eucrenophila | 6 (100) | 1 (16.7) | 6 (100) | 6 (100) | 6 (100) | 6 (100) | 6 (100) |
| A. veronii biovar sobria | 30 (100) | 29 (96.7) | 30 (100) | 30 (100) | 30 (100) | 30 (100) | 30 (100) |
| A. jandaei | 9 (100) | 9 (100) | 9 (100) | 9 (100) | 9 (100) | 9 (100) | 9 (100) |
| A. popoffii | 8 (100) | 8 (100) | 8 (100) | 8 (100) | 8 (100) | 8 (100) | 8 (100) |
| Unidentified ADH(+)c | 19 (100) | 14 (73.7) | 19 (100) | 19 (100) | 19 (100) | 19 (100) | 19 (100) |
| Unidentified ADH(−)d | 34 (100) | 28 (82.4) | 33 (97.1) | 34 (100) | 33 (97.1) | 33 (97.1) | 34 (100) |
| Total | 152 (100) | 119 (78.3) | 151 (99.3) | 152 (100) | 151 (99.3) | 151 (99.3) | 152 (100) |
aThere are difficult isolates that distinguish A. hydrophila from A. bestiarum
bThere are difficult isolates that distinguish A. caviae from A. media
cArginin dehydrolase (ADH) positive
dArginin dehydrolase (ADH) negative