A 6-year-old child presents with lesions on face, covered with honey colored crusts. Pruritus is present. The possible cause can be:
**Core Concept**
Impetigo is a highly contagious superficial skin infection characterized by the formation of golden-brown crusts, typically on the face of children. It is caused by Staphylococcus aureus or Streptococcus pyogenes bacteria, which colonize the skin and produce enzymes that break down skin tissue.
**Why the Correct Answer is Right**
Impetigo typically presents with itchy, red, and crusted lesions on the face, particularly around the mouth, nose, and eyes. The infection is often initiated by minor skin trauma, such as cuts or scratches, which provide an entry point for the bacteria. The bacteria then multiply and produce exfoliative toxins, which cause the skin to break down and form a characteristic honey-colored crust. The presence of pruritus (itching) is a common symptom of impetigo, as the body responds to the infection with an inflammatory response.
**Why Each Wrong Option is Incorrect**
**Option B:** Herpes typically presents with grouped vesicles that rupture to form crusted ulcers, rather than the characteristic honey-colored crusts of impetigo. Herpes also tends to be more painful than impetigo.
**Option C:** Chickenpox is characterized by a widespread vesicular rash that progresses to crusting, but it typically affects multiple areas of the body and is accompanied by fever and malaise. Pruritus is a hallmark symptom of chickenpox, but it is often more severe than in impetigo.
**Option D:** Molluscum contagiosum is a viral skin infection that presents with small, dome-shaped papules or nodules, often with a characteristic dimple in the center. Molluscum contagiosum is typically not itchy and does not form a honey-colored crust.
**Clinical Pearl / High-Yield Fact**
In children, impetigo is often a sign of poor hygiene, as the bacteria that cause the infection are highly contagious and can spread through direct contact with an infected person or contaminated objects.
**✓ Correct Answer: A. Impetigo**