Characteristics and treatment regimens of the study population (n=17)
| Characteristics | N (%) |
| Sex | |
| Male | 14 (82.4) |
| Age (years) | |
| 28–37 | 4 (23.5) |
| 38–47 | 7 (41.2) |
| 48–57 | 4 (23.5) |
| 58–64 | 2 (11.8) |
| Sexual orientation | |
| Men who have sex with men | 2 (11.8) |
| Heterosexual | 15 (88.2) |
| Past history of syphilis history | 0 (0) |
| High-risk sexual behaviour before treatment | 12 (70.6) |
| High-risk sexual behaviour after treatment | 0 (0) |
| Skin or mucosal lesions | 17 (100) |
| Treatment regimens | |
| Benzathine penicillin G | 7 (41.2) |
| Procaine penicillin G | 4 (23.5) |
| Ceftriaxone | 2 (11.8) |
| Azithromycin | 3 (17.6) |
| Minocycline | 1 (5.9) |
| Syphilis diagnosis of casual sex partners (N=22) | |
| Yes | 5 (22.7) |
| Not know | 12 (54.5) |
| Treatment of casual sex partners (N=5) | |
| Yes | 3 (60.0) |
| Not known | 2 (40.0) |
| Syphilis diagnosis of regular sex partners (N=19) | 11 (64.7) |
| Treatment of regular sex partners (N=11) | 11 (100) |