Updated: 2/12/2018

Sexually Transmitted Infections

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 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
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