Ritter’s disease is caused by
**Core Concept**
Ritter's disease is a rare, staphylococcal scalded skin syndrome (SSSS) caused by exfoliative toxins produced by Staphylococcus aureus. This condition primarily affects neonates and young children, leading to widespread skin exfoliation and blistering.
**Why the Correct Answer is Right**
Ritter's disease is caused by the exfoliative toxins A and B, which are produced by Staphylococcus aureus. These toxins cleave the desmoglein 1 protein, a component of the epidermal cell-to-cell adhesion complex, leading to the separation of the epidermis from the dermis and resulting in blistering and exfoliation. The toxins are produced when Staphylococcus aureus is exposed to the host's immune system, and they can spread through direct contact or contaminated items.
**Why Each Wrong Option is Incorrect**
* **Option A:** Incorrect because Ritter's disease is not caused by Staphylococcus epidermidis, which is a common skin commensal bacterium but is not associated with this condition.
* **Option B:** Incorrect because Ritter's disease is not caused by Streptococcus pyogenes, which is responsible for different types of skin infections, such as impetigo and cellulitis.
**Clinical Pearl / High-Yield Fact**
Ritter's disease is often misdiagnosed as a severe form of eczema or burns, but it is essential to recognize the role of Staphylococcus aureus and the presence of exfoliative toxins in its pathogenesis. Early recognition and treatment with antibiotics and supportive care can significantly improve outcomes in affected patients.
**Correct Answer:** C. Staphylococcus aureus