What is a characteristic of varicella?

Varicella, commonly known as chickenpox, is characterized by a specific type of rash that progresses through several stages. The initial presentation includes macules (flat red spots) that develop into vesicles (small, fluid-filled blisters). These vesicles eventually crust over, forming scabs. The presence of crusted vesicles is a notable hallmark of the disease, and it helps differentiate varicella from other skin conditions.

This characteristic evolution of the rash is a key clinical feature of varicella, as it indicates the progression of the infection and corresponds with the infectious stage of the disease. It is important for healthcare providers to recognize these crusted vesicles, as they can inform diagnoses and guide treatment decisions, as well as assist in infection control measures.

The other options do not align with the typical presentation of varicella. Blisters filled with blood describe a different type of dermatological problem and are not associated with chickenpox. Scaly patches on the skin could indicate conditions such as psoriasis or eczema, which are unrelated to varicella. Widespread bruising is indicative of trauma or coagulation disorders, neither of which pertains to the characteristics of varicella.