Staphylococcal scalded skin syndrome is caused by
**Core Concept**
Staphylococcal scalded skin syndrome (SSSS) is a skin condition caused by staphylococcal toxins, leading to epidermal exfoliation and a scalded appearance. It primarily affects infants and young children.
**Why the Correct Answer is Right**
SSSS is caused by exfoliative toxins (ETs) produced by Staphylococcus aureus. These toxins cleave desmoglein 1, a component of desmosomes, which are intercellular junctions that hold keratinocytes together in the epidermis. This cleavage disrupts cell-to-cell adhesion, leading to the separation of epidermal layers and the characteristic scalded skin appearance.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it does not specify the correct pathogen or toxin responsible for SSSS.
**Option B:** Streptococcal infections can cause a range of skin conditions, but they are not the primary cause of SSSS.
**Option C:** This option is incorrect as it does not accurately identify the toxin responsible for SSSS.
**Clinical Pearl / High-Yield Fact**
SSSS is often caused by a strain of Staphylococcus aureus that produces exfoliative toxin A (ETA) or exfoliative toxin B (ETB). These toxins are responsible for the characteristic epidermal exfoliation seen in SSSS.
**Correct Answer:**
Staphylococcal scalded skin syndrome is caused by exfoliative toxins produced by Staphylococcus aureus.