What type of impetigo is characterized by pruritic tender, red vesicles surrounded by erythema with ulcerating rash?

The correct answer describes ecthyma, which is a more severe form of impetigo that typically presents with deep pustules or ulcers that can cause significant discomfort. In ecthyma, the vesicles become ulcerated and are often surrounded by an area of erythema. The ulcers can be quite tender and may also be pruritic, contributing to discomfort for the affected individual.

This condition is usually caused by the same bacteria that cause other types of impetigo, such as Staphylococcus aureus or Streptococcus pyogenes. However, ecthyma is distinct from nonbullous impetigo, which usually presents with crusted lesions that are not as deep or ulcerative. In contrast, bullous impetigo would typically feature larger blisters filled with fluid rather than an ulcerating rash. Staphylococcal scalded skin syndrome (SSSS) is characterized by widespread superficial desquamation and is not primarily associated with localized vesicles or ulcerative lesions typical of ecthyma.

Consequently, the description of pruritic tender red vesicles focused on ulceration is most accurately represented by ecthyma, confirming it as the correct choice.