Causative organism Mycoplasma genitalium (Mg)
Incubation period Unknown but symptoms commonly develop within 1-3 weeks
How far back to trace There are currently insufficient data to provide a definitive period for this, but partner notification is recommended
Usual testing method Nucleic acid amplification testing on first pass urine in men (urethral swab less sensitive) and first pass urine, high vaginal or cervical swab in women
Common symptoms

Urethral discharge or dysuria in men
Is a cause of cervicitis in women and PID
Symptoms of cervicitis/PID include dyspareunia, post-coital bleeding, vaginal discharge and abdominal pain
Commonly asymptomatic in men and women

Likelihood of transmission per act of unprotected intercourse Unknown
Likelihood of long-term sexual partner being infected 38-63% of sexual partners infected
Protective effect of condoms Probably high
Transmission by oral sex

Unknown but likely

Studies are limited but indicate it is uncommonly detected in the pharynx

Duration of potential infectivity Uncertain; however, persistent infection is common: 25% of infections persist > 12 months and infections up to 2-3 years have been reported
Important sequelae cervicitis, PID, preterm delivery and infertility in women
Direct benefit of detection and treatment of contacts Cure
Usual management of contacts

Counselling, clinical examination, testing and treatment of partners.
A test of cure is recommended at 2-4 weeks.
If M.genitalium is resistant to treatment, seek specialist advice for on-going symptoms.

Contact tracing priority High
Notification Not notifiable in Australia or New Zealand.