Cases of sexually transmitted Shigella flexneri and Shigella sonnei in men who have sex with men (N=33)
| Crude OR | 95% CI | P value | ||
| HIV seropositive | ||||
| S. flexneri | 5/5 (100%) | 28.1 | 1.27 to 619 | <0.05 |
| S. sonnei | 4/15 (27%) | |||
| HIV negative on PREP | ||||
| S. flexneri | 0/0 | 3.8 | 0.06 to 243 | 0.53 |
| S. sonnei | 2/11 (18%) | |||
| Bacterial sexually transmitted infection | ||||
| S. flexneri | 2/5 (40%) | 0.8 | 0.1 to 6.0 | 0.8 |
| S. sonnei | 7/15 (47%) | |||
| Chemsex | ||||
| S. flexneri | 3/5 (60%) | 1.7 | 0.2 to 13.4 | 0.61 |
| S. sonnei | 7/15 (47%) |