Bugs Causing Sexually Transmitted Diseases Bug Disease Key associations Neisseria gonorrhoeae Gonorrhea • No capsule• Ferments glucose but not maltose• No vaccine Haemophilus ducreyi Chancroid • Painful ulcer Treponema pallidum Syphilis • Primary, secondary, tertiary• Congenital Chlamydia trachomatis Chlamydia, lymphogranuloma venereum • Reticulate bodies and elementary bodies • Serotypes D-K cause STD• L1-L3 cause lymphogranuloma venereum HPV 6 and 11 Anogenital warts (condylomata acuminata) • Koilocytes HBV Hepatitis B • "B is Bad"• Acute or chronic hepatitis• Hepatocellular carcinoma• Cirrhosis HIV AIDS • Kaposi's sarcoma• Lymphoma• Opportunistic infections Gardnerella vaginalis *not sexually transmitted, though associated with sexual activity Vaginosis • Clue cells • Fishy smell • Gram-variable Trichomonas vaginalis Vaginitis • Protozoa • Corkscrew motility Klebsiella granulomatis Granuloma inguinale • Gram-negative rods (Donovan bodies) Note that bacterial vaginosis is a type of vaginitis