Scabies is caused by the mite Sarcoptes scabiei, which burrows into the skin causing intense itching and characteristic rash. Microscopic examination of skin scrapings from suspect lesions can confirm diagnosis by identifying the mite itself, eggs, or fecal pellets — though even experienced examiners often diagnose scabies clinically when microscopic findings are negative.
This test is used to confirm suspected scabies, particularly in atypical presentations, outbreaks in institutional settings, or when treatment failure is suspected. Sample type is a skin scraping from suspected scabies lesions.