Table 2.
Salmonella isolation from different sample types in broiler farms with or without enrofloxacin (ENR) use *
| ENR use | Sample no. | % (no. positive/total no. samples) | ||||
|---|---|---|---|---|---|---|
| Cloacal swab | Litter | Feed | Water | Total | ||
| Yes | 924 | 7.5 (29/385) a | 8.2 (19/231) a | 4.5 (7/154) | 0.0 (0/154) | 6.0 (55/924) a |
| No | 660 | 13.8 (38/275) b | 15.2 (25/165) b | 4.5 (5/110) | 0.0 (0/110) | 10.3 (68/660) b |
| Total | 1584 | 10.2 (67/660) | 11.1 (44/396) | 4.5 (12/264) | 0.0 (0/264) | 7.8 (123/1584) |
*Lowercase (a/b) were used to indicate significant difference in isolation rates between farms with enrofloxacin use and those without; different letters indicate significant differences (P < 0.05)