Genital Diseases, Female/complications; Genital Diseases, Male/complications; HIV Infections/complications; Ulcer/complications; Adult; Anti-Bacterial Agents/therapeutic use; Antiretroviral Therapy, Highly Active; CD4 Lymphocyte Count; Female; Genital Diseases, Female/drug therapy; Genital Diseases, Female/microbiology; Genital Diseases, Male/drug therapy; Genital Diseases, Male/microbiology; HIV Infections/drug therapy; Herpes Genitalis/complications; Herpes Genitalis/drug therapy; Herpes Genitalis/virology; Humans; Male; Middle Aged; Nigeria; Sexually Transmitted Diseases, Bacterial/complications; Sexually Transmitted Diseases, Bacterial/drug therapy; Sexually Transmitted Diseases, Bacterial/microbiology; Treatment Outcome; Ulcer/drug therapy; Ulcer/microbiology