Table 3. Microbial aetiology of GUD at a community healthcare centre in Johannesburg, 2007–2015.

Pathogen	Prevalence (95% CI)	N = 771
Herpes simplex virus	60.7% (57.2–64.1)	468
Treponema pallidum	3.9% (2.7–5.5)	30
Chlamydia trachomatis L1-L3 (Lymphogranuloma venereum)	0.9% (0.4–1.9)	7
Haemophilus ducreyi	0.5% (0.2–1.4)	4
Klebsiella granulomatis	0%	0
Mixed aetiology (HSV-2 + bacterial pathogen)	0.8% (0.4–1.7)	6
No STI pathogen	34.8% (31.5–38.2)	268