Micro & Immunology · single question

How is impetigo primarily transmitted?

  1. Direct contact with infected skin or secretions
  2. Airborne transmission
  3. Fecal-oral route
  4. Vector-borne (insect bites)
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Correct answer: A. Direct contact with infected skin or secretions

Impetigo is a highly contagious superficial bacterial skin infection caused primarily by Staphylococcus aureus and/or Streptococcus pyogenes (Group A Streptococcus). It is transmitted through direct contact with the infected skin lesions, contaminated fingers, clothing, or towels. Children are most commonly affected. Impetigo is not transmitted by airborne droplets. In dentistry, practitioners should be aware of impetigo as a contraindication to elective dental treatment due to its contagious nature; standard contact precautions should be applied.

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