TABLE 2.
Presence of toxin genes in Aeromonas spp. isolated from diarrheal children
| Species (HG) | No. of isolates | No. (%) of isolates positive for the gene(s) encoding:
|
||
|---|---|---|---|---|
| Alta | Astb | Alt + Ast | ||
| A. hydrophila | ||||
| (HG1) | 11 | 0 (0.0) | 0 (0.0) | 6 (54.6) |
| (HG2) | 3 | 0 (0.0) | 1 (33.3) | 0 (0.0) |
| A. veronii biotype sobria (HG8) | 21 | 2 (9.5) | 6 (28.6) | 8 (38.1) |
| A. caviae (HG4) | 39 | 11 (28.2) | 0 (0.0) | 26 (66.7) |
| A. media (HG5) | 14 | 5 (35.7) | 1 (7.1) | 8 (57.1) |
| A. eucrenophila (HG6) | 1 | 0 (0.0) | 1 (100.0) | 0 (0.0) |
| A. trota (HG13) | 25 | 0 (0.0) | 9 (36.0) | 16 (64.0) |
| Unknown | 1 | 1 (100.0) | 0 (0.0) | 0 (0.0) |
| Total | 115 | 19 (16.5) | 18 (15.7) | 64 (55.7) |
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; one A. hydrophila (HG1) isolate was positive for the genes encoding Alt, Ast, and Act.