Causative organism Haemophilus ducreyi
Incubation period 6 days to 2 weeks
How far to trace back 2 weeks before ulcer appeared or since arrival in endemic area
Usual testing method Nucleic acid amplification testing or culture
Common symptoms Painful anogenital ulcers; enlarged tender inguinal nodes (buboes) which may breakdown and discharge
Likelihood of transmission per act of unprotected intercourse High
Likelihood of long-term sexual partner being infected High; asymptomatic infection is thought to occur sometimes in women
Protective effect of condoms Probably high
Transmission by oral sex Rare
Duration of potential infectivity Weeks
Important sequelae Local tissue destruction, inguinal abscesses and draining sinuses
Direct benefit of detection and treatment of contacts Cure
Usual management of contacts

Counselling, clinical examination and testing of lesions for chancroid

Presumptively treat partners see Australasian STI Management Guidelines for treatment quidelines

Contact tracing priority High, as not endemic in Australia or New Zealand. Specialist support for contact tracing should be sought if local acquisition or transmission is possible

Notifiable in most Australian states and territories except ACT and Victoria: Check local guidelines and seek specialist contact tracing support.

Not notifiable in New Zealand