Scabies

A 28-year-old woman presents with intense itching for 3 weeks, worse at night. She reports burrows on her wrists, finger webs, and axillae. Her 5-year-old daughter and husband also have similar symptoms. Examination reveals erythematous papules, excoriations, and characteristic linear burrows. Dermoscopy shows the mite, eggs, and feces within the burrow. What is the most appropriate first-line treatment?

A 62-year-old man with advanced dementia and poor hygiene presents with widespread crusted plaques over his entire body, including the face, palms, and soles. He has minimal pruritus despite severe infestation. Microscopy of skin scrapings reveals hundreds of mites. His caregivers report he has not responded to two courses of permethrin applied 1 week apart. What is the most likely diagnosis and the most appropriate next treatment?

Which mite species is responsible for human scabies?

A 32-year-old woman presents with intense pruritus, worse at night, affecting the interdigital spaces, wrists, and axillae for 2 weeks. Examination reveals burrows and papules. Scabies is confirmed by dermoscopy. What is the drug of choice for treatment?

A 32-year-old woman presents with severe pruritus, particularly at night, affecting the interdigital spaces, flexural surfaces, and genitalia. Examination reveals burrows and papules. Which investigation is the gold standard for confirming scabies?