Chapter 32 Sexually Transmitted Diseases

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Chapter 32 Sexually Transmitted Diseases

• MLAB 2434 Clinical Microbiology
• Cecile Sanders Keri Brophy-Martinez

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Definitions

• STI Sexually Transmitted Infection
• STD Sexually Transmitted Disease
• VD Venereal Disease (after Venus, goddess of
  love)

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Sexually Transmitted Infections

• Neisseria gonorrhoeae
• Typical G- dc
• Gram stain significant in males, not in females
• Infects columnar epithelial cells of the GU tract
• Can spread in blood, producing rash on
  extremities and arthritis in joints

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Sexually Transmitted Infections (contd)

• Genital Chlamydiosis
• C. trachmoatis
• Not culturable
• Identified by nucleic acid probes, cell culture,
  or identification of chlamydial inclusions

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Sexually Transmitted Infections (contd)

• Bacterial Vaginosis (not vaginitis)
• Gardenella vaginalis
• Mechanism of infection with this bacteria is not
  clear may be infectious in the presence of
  Mobiluncus (anaerobic G- bacillus)
• Fish-like odor
• Clue cells
• Presence of odor and clue cell make this
  condition ease to diagnose without culture

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Sexually Transmitted Infections (contd)

• Syphilis T. pallidum
• Chancroid Haemophilus ducreyi
• Genital Herpes