Norwegian scabies

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Related to Norwegian scabies: permethrin, Ivermectin


 [ska´bēz, ska´be-ēz]
a contagious skin disease caused by the itch mite, Sarcoptes scabiei. Scabies, sometimes popularly called “seven-year itch,” is most likely to erupt in folds of the skin, such as in the groin, beneath the breasts, or between the toes or fingers. It is classified as a sexually transmitted disease.

The adult itch mite has a rounded body about one-fiftieth of an inch long. The skin lesions are caused by the female, which burrows beneath the skin and digs a short tunnel parallel to the surface, in which it lays its eggs. The eggs hatch in a few days, after which the baby mites find their way to the skin surface, where they mate and complete the life cycle.
Symptoms. During the initial tunnel digging and egg laying, the human host may be oblivious to what is happening. There is little itching and there are few lesions. In about a month, the itching becomes intense because of hypersensitivity to the mite. The itch is often worse at night. The tunnels in the skin can now be discerned as slightly elevated grayish white lines. The mite itself can often be seen—with the aid of a magnifying glass—as a tiny black speck at the end of the tunnel. Blisters and pustules also may develop in the skin near the tunnel.
Transmission. Scabies is usually transmitted from person to person by direct skin contact. Transmission via clothing and other inanimate objects is uncommon. Epidemics are fairly common in such places as camps, barracks, and institutions. It is unusual for one member of a family not to communicate it to the others. The Centers for Disease Control and Prevention recommend the wearing of gowns and gloves for close contact with an infested person. Masks are not necessary. All contacts that the patient has had should be treated at the same time.
Treatment andPrevention. Scabies treatment consists of topical permethrin cream (Elimite), lindane, or crotamiton (Eurax), applied from the neck down and then washed off. For infants, 5 to 6 per cent precipitated sulfur in petrolatum, applied twice daily for a week, is usually adequate.
Norwegian scabies a rare, severe form of scabies associated with a heavy infestation of Sarcoptes scabiei, seen especially in the senile and mentally retarded, in patients with poor sensation or severe systemic disease, and in immunocompromised patients; it apparently represents an abnormal host immune response to the etiologic agent. Characteristics include a marked crusting dermatitis of the hands and feet with subungual horny debris, erythematous scaling plaques on the neck, scalp, and trunk that may become generalized, and usually lymphadenopathy and eosinophilia.

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.

Norwegian scabies

Etymology: Norway; L, scabere, to scratch
a severe infestation of human skin by an itch mite, Sarcoptes scabiei. The condition is associated with intense itching, crusting and scaling of the skin, and insect egg burrows that appear as discolored lines in the affected skin areas. Compare scabies.
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Norwegian scabies
Severe scabies, seen in institutionalised persons—e.g., those with Down syndrome—or either debilitated or immunosuppressed patients, caused by Sarcoptes scabiei var hominis


associated in some way with Norway.

Norwegian buhund, Norwegian sheepdog
a medium-sized (26-40 lb), spitz-type dog with a short, dense coat in wheaten, black, red or sable, sometimes with black markings on the face, ears and tip of the curled tail. The ears are large, pointed and erect.
Norwegian elkhound
a medium-sized (40 lb) compact dog with a short body, very thick, medium length coat, pointed erect ears and a bushy tail tightly curled over the back. The hair is gray, tipped with black, and there is a thick, light-colored undercoat. The breed is predisposed to progressive retinal atrophy.
Norwegian forest cat
a medium- to large-sized, muscular cat with a woolly undercoat and long outer coat in any color combination. The breed is affected by glycogenosis IV.
Norwegian red cattle
red or red and white dairy cattle, may be polled, originated from two native Norwegian breeds.
Norwegian scabies
see Norwegian scabies.
Norwegian tetany-paresis
a special form of lactation tetany (1) caused by feeding cows on a herring and cellulose, low-energy high-protein, diet which is very low in magnesium.


infestation by mites of the genus Sarcoptes. See also sarcoptic mange.

feline scabies
see notoedrescati.
scabies incognito
a variant of sarcoptic mange in dogs in which mites are difficult or impossible to recover in skin scrapings, presumably because of the extensive grooming and generally high level of skin hygiene that lacks only the use of a scabicide. Also there are usually only a few mites present once an immunity develops. Further infection may cause a hypersensitivity but the mites present will still be in small numbers.
Norwegian scabies
a variety characterized by immense numbers of mites and marked scaling of the skin. Seen in immunocompromised patients.
References in periodicals archive ?
3) However, in cases involving an impaired immune response, it is difficult to control the numbers of mites in the infected skin, and a Norwegian scabies host may harbor more than 1 million mites?
In nursing homes, patients with unrecognized Norwegian scabies are often the source of transmission to other residents and staff members.
Treatment and decontamination are needed for Norwegian scabies
The most effective treatment for Norwegian scabies is oral ivermectin, which requires permission for use from the Medicines Control Council.
Increased parasitic load, hyperkeratotic skin, and involvement of the nails make the treatment of Norwegian scabies difficult.
Norwegian scabies in acquired immunodeficiency syndrome: Report of a case resulting in death from associated sepsis.
Wong SS, Woo PC, Yuen KY (2005) unusual laboratory findings in a case of Norwegian scabies provided a clue to diagnosis.

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