crusted scabies

Nor·we·gian sca·bies

a severe form of scabies with innumerable mites in thickened stratum corneum; has been linked with cellular immune deficiencies, including AIDS.
Severe scabies, seen in institutionalised persons—e.g., those with Down syndrome—or either debilitated or immunosuppressed patients, caused by Sarcoptes scabiei var hominis

crusted scabies

Dermatology Severe scabies, seen in institutionalized persons–eg, with Down syndrome or either debilitated or immunosuppressed Pts Clinical Many mites—Sarcoptes scabei var.homini, with a psoriasis-like pachydermia, variably accompanied by thickened nails, generalized hyperpigmentation, eosinophilia, pyoderma, lymphadenopathy. See Seven-year itch.

crusted scabies

Widespread scabies involving large areas of the skin, usually found in people with immune-suppressing illnesses, malnutrition, or unhygienic living situations. Crusted scabies is very contagious. Scaling skin from affected persons readily distributes mites to individuals in contact with the patient.
References in periodicals archive ?
Norwegian scabies - also known as crusted scabies - is a rare form of scabies and spread by skin to skin contact.
Also known as Crusted scabies, the severe infection is caused by microscopic mites which burrow under the skin and give the appearance of thick, warty crusts.
Crusted scabies is more contagious and causes more environmental contamination than classical scabies, because there are thousands of mites in the crusts which are shed into the environment.
For crusted scabies, using both oral and topical treatments are recommended, with up to four follow-up treatments, each one week apart (with dermatology support).
He prefers to use these two categories because patients with a high burden of disease may present with multiple papules instead of crusts, but need the combination therapy used for crusted scabies.