TABLE 3.
Presence of toxin genes in Aeromonas spp. isolated from control children
| Species (HG) | No. of isolates | No. (%) of isolates positive for the gene(s) encoding:
|
||
|---|---|---|---|---|
| Alta | Astb | Alt + Ast | ||
| A. hydrophila (HG1) | 1 | 0 (0.0) | 0 (0.0) | 0 (0.0) |
| A. veronii biotype sobria (HG8) | 4 | 1 (25.0) | 1 (25.0) | 0 (0.0) |
| A. caviae (HG4) | 11 | 4 (36.4) | 0 (0.0) | 5 (45.5) |
| A. media (HG5) | 1 | 1 (100.0) | 0 (0.0) | 0 (0.0) |
| A. eucrenophila (HG6) | 1 | 1 (100.0) | 0 (0.0) | 0 (0.0) |
| A. trota (HG13) | 6 | 1 (16.7) | 4 (66.7) | 1 (16.7) |
| A. jandeii (HG9) | 1 | 1 (100.0) | 0 (0.0) | 0 (0.0) |
| Unknown | 2 | 0 (0.0) | 2 (100.0) | 0 (0.0) |
| Total | 27 | 9 (33.3) | 7 (25.9) | 6 (22.2) |
a
Heat-labile cytotonic enterotoxin.
b
Heat-stable cytotonic enterotoxin. No isolate was positive for the gene encoding cytotoxic enterotoxin (Act) only, the genes encoding Alt and Act, or the genes encoding Ast and Act; the A. hydrophila isolate was positive for genes encoding Alt, Ast, and Act.