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Questions and Answers
What is the most common causative agent of impetigo?
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?
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?
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?
Which of the following is a characteristic feature of impetigo lesions that distinguishes them from herpes simplex virus lesions?
What are the potential complications associated with impetigo?
What are the potential complications associated with impetigo?
How does impetigo primarily differ from pemphigus (bullous type)?
How does impetigo primarily differ from pemphigus (bullous type)?
What distinguishes impetigo from scabies when considering a clinical diagnosis?
What distinguishes impetigo from scabies when considering a clinical diagnosis?
Why is impetigo considered highly contagious?
Why is impetigo considered highly contagious?
What is the main focus of treatment for impetigo?
What is the main focus of treatment for impetigo?
Which condition could impetigo potentially evolve into?
Which condition could impetigo potentially evolve into?
Why is it crucial to use systemic antibiotics in treating impetigo?
Why is it crucial to use systemic antibiotics in treating impetigo?
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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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