Triggering microbes
| Ciprofloxacin group No (%) | Placebo group No (%) | |
| Enteroarthritis | 30 (83) | 30 (86) |
| Salmonella | 11 (31) | 11 (31) |
| Yersinia | 10 (28) | 10 (29) |
| Campylobacter | 5 (14) | 7 (20) |
| Clostridium difficile | 0 | 1 (3) |
| Undefined | 4 (11) | 1 (3) |
| Uroarthritis | 6 (17) | 5 (14) |
| Chlamydia | 2 (6) | 1 (3) |
| Gonorrhoea | 1 (3) | 0 |
| Undefined | 3 (8) | 4 (11) |