Impetigo: Bacterial Skin Infection Quiz

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Questions and Answers

What is the most common causative agent of impetigo?

  • Mycobacterium
  • Streptococcus (correct)
  • Escherichia coli
  • Haemophilus influenzae

Which age group is most commonly affected by impetigo?

  • Young adults aged 25-30
  • Teenagers aged 15-18
  • Elderly people above 65
  • Children younger than 12 (correct)

How is impetigo primarily transmitted?

  • Via contaminated water
  • Through direct contact (correct)
  • Via airborne particles
  • Through mosquito bites

Which of the following is a characteristic feature of impetigo lesions that distinguishes them from herpes simplex virus lesions?

<p>Golden yellow crusts (D)</p> Signup and view all the answers

What are the potential complications associated with impetigo?

<p>Post strep glomerulonephritis and arthritis (C)</p> Signup and view all the answers

How does impetigo primarily differ from pemphigus (bullous type)?

<p>Presents with golden yellow crusts (A)</p> Signup and view all the answers

What distinguishes impetigo from scabies when considering a clinical diagnosis?

<p>Presence of golden yellow crusts on skin lesions (D)</p> Signup and view all the answers

Why is impetigo considered highly contagious?

<p>Can be transmitted via sharing items like towels (D)</p> Signup and view all the answers

What is the main focus of treatment for impetigo?

<p>Preventing spread and complications (C)</p> Signup and view all the answers

Which condition could impetigo potentially evolve into?

<p>Post strep glomerulonephritis (A)</p> Signup and view all the answers

Why is it crucial to use systemic antibiotics in treating impetigo?

<p>To target the bacteria throughout the body (D)</p> Signup and view all the answers

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Study Notes

Impetigo

  • Superficial bacterial skin infection that affects only the epidermis
  • Caused by staphylococcus, streptococcus, or both
  • Most commonly seen in children younger than 12 years old
  • Incubation period: 1-3 days
  • Affects exposed areas such as the face, hands, and lower limbs

Characteristics

  • Multiple lesions characterized by golden yellow crusts
  • High contagiousness through direct contact and sharing items like towels and clothes
  • Tends to clear slowly, leaving no scars due to epidermal location

Complications

  • Post-streptococcal glomerulonephritis
  • Arthritis (but not rheumatic fever)

Diagnosis and Treatment

  • Clinical diagnosis
  • Differential diagnosis includes scabies (when infected), pemphigus (bullous type), and herpes simplex (may become impetiginized)
  • Treatment aims to prevent spread (including hematogenous spread) and decrease risk of complications
  • Treatment options:
    • Broad-spectrum systemic antibiotics (dicloxacillin or cephalexin)
    • Topical antibiotics (gentamycin and fusidic acid)

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