TRICHOMONIASIS
| Causative organism | Trichomonas vaginalis |
| Incubation period | 5-28 days |
| How far back to trace | There is insufficient data to provide a definitive period, but current partner/s notification and concurrent treatment is recommended to prevent reinfection. |
| Usual testing method | Nucleic acid amplification tests (NAATs) are the most sensitive tests available to detect Trichomonas vaginalis. Wet preparation microscopy and culture are less sensitive |
| Common symptoms | 10–50% of women and most men are asymptomatic. Symptoms in women: vaginal itch, vaginal discharge typically profuse and frothy Symptoms in men: urethral discharge and dysuria (both uncommon) |
| Likelihood of transmission per act of unprotected intercourse | Unknown, likely moderate to high Perinatal transmission 5% |
| Likelihood of long-term sexual partner being infected | Up to 70% of male partners of infected women and 60-100% of female partners of infected men |
| Protective effect of condoms | High |
| Transmission by oral sex | Extragenital injections (oral, anal) are uncommon |
| Duration of potential infectivity | Trichomonas vaginalis in women is thought to be longstanding, up to 3-5 years, whereas infection among men may spontaneously resolve lasting up to 4 months. |
| Important sequelae | Preterm delivery and low birth weight; Increased transmission of HIV |
| Direct benefit of detection and treatment of contacts | Cure |
| Usual management of contacts | Counselling, clinical examination and testing. Treat male and female sexual partners presumptively |
| Contact tracing priority | Medium. |
| Notification | Not notifiable in Australia or New Zealand |