Chancroid
Pathogen
Haemophylus ducrei (Anaerobic gram negative bacillus)
Epidemiology
Mainly core groups (associated with promiscuity, sex work, poor hygiene)
Common in Africa, Asia, Central and South America - incidence appears to have decreased since onset of HIV epidemic
Clinical
Incubation period <10 days
Asymptomatic infection rare
Papule > pustule > painful genital ulceration > auto-innoculation > multiple ulcers > suppurative inguinal buboes
Diagnosis
Visualise bacteria: Gram smear (poor sensitivity, sensitivity), culture (on selective media), approx. 50% sensitivity
Nucleic acid detection: in research settings
Management
Azithromycin, erythromycin, ciprofloxacin...(generally resistant to penicillins, tetracyclines)