What condition should the nurse suspect if a child has a vesicular rash lasting 6 days?

The presence of a vesicular rash lasting for 6 days strongly suggests varicella, commonly known as chickenpox. This viral infection is characterized by an initial rash that progresses through stages, starting as macules, then developing into vesicles, and eventually crusting over. The timeline matches the typical course of varicella, where vesicles appear and may last for about 5-7 days, during which new lesions can continue to appear.

In contrast, scabies typically involves intense itching with the presence of burrows and papules rather than a prolonged vesicular rash. Impetigo usually presents with honey-colored crusted lesions and does not typically appear as a vesicular rash for an extended duration. Eczema, while it can exhibit vesicles, often has a dry, scaly appearance and is usually associated with itching and inflammation over time but does not follow the specific progression and timeline observed in varicella.

Considering these factors, the vesicular rash lasting 6 days aligns well with the expected clinical presentation of varicella.