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Sexual health and LGBT population
Living with HIV
Post-exposure prophylaxis (PEP)
From a global point of view, chancroid is more often the offending agent responsible for the occurrence of genital ulcers. Once again, from a global perspective, chancroid is more frequent than syphilis (please refer to the section on syphilis). While the incidence is greater in tropical and sub-tropical countries, such as Africa (where Haemophilus ducreyi is responsible for up to 70 % of genital ulcers), there are infrequent outbreaks in Canada and the United States (some specialty STI clinics report up to 10-20 % of genital ulcers secondary to this pathogen).