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[Hospital spread of scabies from an immunocompromised patient with Norwegian scabies].

Scabies was first found in a 71-year-old female who had been diagnosed as having leukemic transformation of primary myelofibrosis and had undergone treatment for the disease. She was admitted to the hospital in December 1986, because of abdominal fullness and a generalized subcutaneous tumor that proved to be myeloblastoma. For treatment of the underlying disease, the regimen of the combination of vindesine, cyclophosphamide, 6-mercaptopurine, and prednisolone was selected. She developed cardiac failure and fell into a coma one month after starting the anticancer therapy. She was put on artificial respiration and on additional steroid therapy as well. Dexamethasone was administrated at 16 mg/day. Since the myeloblastomas found on admission regressed, the steroid therapy was continued. She was in coma for a few days before her skin lesions turned red and formed a grayish crust in the lower abdominal region. Several days later, the doctor responsible for the treatment of this patient developed pruritus and exanthema on both arms, and soon many nurses in the same hospital-ward developed similar symptoms. At approximately the same time, the patient with myelofibrosis was diagnosed as having Norwegian scabies: the crusted skin lesions revealing many Sarcoptes scabiei mites. Two doctors (2/18), 17 nurses (17/19) and 3 other patients (3/51) were found to have contracted scabies, and we recognized the hospital spread of the infection. The first patient was isolated in a private room, and we avoided direct contact with her. The persons with scabies were treated with crotamiton liniment. The first scabies patient died of cardiac failure 1 month after falling into a coma.(ABSTRACT TRUNCATED AT 250 WORDS)

Aged

[Variability in scabies mites Sarcoptes scabiei De Geer (Acariformes, Sarcoptidae) in relation to scabies epidemiology. 1. A statistical model of female variability].

Individual variability of 235 grain mite females from Moscow and the Moscow Province was studied. The data were processed on a computer. Body proportions were used as a representative dimension index. The size of proterosomal scutellum was stable. A map of the chaetoid cover of notum is given, and its variability was studied. Statistical analysis of all signs was made. Frontal chaetoid and sejugal sections and the number of caudal chaetoids are stable. Naked, middle and abdominal chaetoid sections are the most variable. Linear sizes of naked section and the number of chaetoid sets on middle and abdominal sections correlate with the number of undeveloped chaetoids. The statistical model of variability may be useful for populational analysis of Sarcoptes forms in connection with scab epidemiology.

Animals

Today's scabies.

In the past several years there has been a noticeable increase of scabies in the United States; the magnitude of this is not known. An expanding epidemic continues in most parts of the world. Scabies is frequently seen in many guises that may be difficult to diagnose: scabies in the clean, scabies incognito, nodular scabies, animal-transmitted scabies, scabies in infants, scabies with syphillis, and Norwegian scabies. If the diagnosis cannot be confirmed by identifying the mite, synthesis of suggestive features may establish the diagnosis. Recently adopted children from foreign countries, especially southeastern Asia, have had a high frequency of scabies, which may appear after the children arrive in the United States. Acute glomerulonephritis may develop in patients whose scabetic lesions are complicated by a Virulent nephritogenic streptococcal strain.

Acute Disease

Scabies in chronic health care institutions.

BACKGROUND: The diagnosis and management of outbreaks of scabies in health care facilities may be difficult. As there is little information available regarding the extent of this problem we conducted a questionnaire study to provide an indication of the occurrence of scabies in chronic health care facilities in the province of Ontario, Canada. It also documented the facilities' approach to the management of the disease. OBSERVATIONS: Two outbreaks of scabies in chronic health care facilities are described. The questionnaire study revealed that 25% of the institutions reported that they had problems with scabies over a 1-year period. A minority had a written policy with respect to dealing with the management of scabies, particularly in the setting of a mass outbreak. CONCLUSIONS: Scabies is a common problem in chronic health care facilities; however, diagnosis and management may be difficult. The development of a specific protocol for the management of such outbreaks by the appropriate public health agencies would be useful.

Adult

Crusted (Norwegian) scabies.

Crusted (Norwegian) scabies, a rare variant of ordinary scabies, is a highly contagious infection in which the skin is infested with thousands to millions of mites. The infection is frequently overlooked because of its atypical presentations. Patients with cognitive deficiency or an immunodeficiency disorder (including immunosuppressive therapy) are predisposed to developing crusted scabies. The infection often presents as generalized dermatitis with crusted hyperkeratosis on the palms and soles. Diagnosis is made by examining skin scrapings from the crusted lesions. Lindane is the scabicide most widely used in the treatment of crusted scabies. Eradication frequently requires repeated applications, and care must be taken to avoid lindane toxicity. Permethrin cream is as efficacious as lindane in the treatment of ordinary scabies. Because of its wider margin of safety, permethrin may become the preferred treatment for crusted scabies.

Hexachlorocyclohexane

Role of sociocultural and environmental factors in the cause of scabies.

A house-to-house survey for scabies was done in a semiurban area with a population of 1727 from 273 families in 253 households, to study the sociocultural and environmental factors in families with scabies. It was found that sleeping habits, overcrowding for sleeping space and sharing of clothes, towel, etc, were significantly associated with scabies. There was no significant correlation between the size of family and the number of persons infected with scabies per family. The prevalence of scabies within the families was almost the same either with good hygiene, satisfactory hygiene or unsatisfactory hygiene. The factors significantly associated with the disease were observed to be more frequent among Christian families than among Hindus and were thought to be responsible for higher prevalence of the disease within the Christian families.

Attitude to Health

Community control of scabies: a model based on use of permethrin cream.

For 18 years treatment with lindane or crotamiton products has failed to stem the epidemic of scabies among the Kuna Indians in the San Blas islands of the Republic of Panama. Permethrin 5% cream was introduced as the only treatment in a programme to control scabies on an island of 756 inhabitants and involving workers recruited locally. Prevalence fell from 33% to less than 1% after every person was treated. As long as continued surveillance and treatment of newly introduced cases was maintained, prevalence of scabies remained below 1.5% for over 3 years. When supply of medication was interrupted for 3 weeks, prevalence rose to 3.6%. When control was lost after the US invasion of Panama, prevalence rose to 12% within 3 months. Bacterial skin infections decreased dramatically when scabies was controlled. Permethrin is safe and effective even in areas where this disease has become resistant to lindane.

Administration, Topical

Factors associated with pediculosis pubis and scabies.

OBJECTIVE: To ascertain factors associated with genital pediculosis and scabies infestations among attenders at an STD clinic. DESIGN: Cross sectional assessment of potential risk factors by multiple logistic regression. SETTING: A central city sexually transmitted diseases (STD) clinic in Adelaide, South Australia. SUBJECTS: All men and women patients attending from 1988 to 1991. RESULTS: Pediculosis pubis was diagnosed in 205 of 12,170 (1.7%) men and 65 (1.1%) of 6125 women, and scabies in 56 (0.5%) men and 6 (0.1%) women attending an STD clinic from 1988-1991. Independent risk factors by multivariate analysis for pediculosis pubis in women were pregnancy (odds ratio (OR) = 2.3), sex outside the state (OR = 2.2) and age under 25 (OR = 2.0). Many factors were associated with pediculosis pubis in men, including no steady partner (OR = 1.4), multiple partners (OR = 1.6), being unmarried (OR = 2.0) and homosexual behaviour (OR = 1.6). None of these factors was associated with scabies infestation which was strongly associated with being Aboriginal (OR = 6.8) and being unemployed (OR = 2.5). CONCLUSION: In this setting scabies appears to be determined by socioeconomic factors and pediculosis pubis predominantly by sexual activity factors.

Australia

Norwegian scabies in homozygous twins.

Norwegian scabies in two female homozygous twins, 12 years of age, was observed. Both children were in good psychosomatical condition. Clinical signs of Norwegian scabies with appearance of verrucous and keratotic papules on the dorsal aspect of hands, elbows and knees appeared after a year of persisting typical scabies in their family. Serum vitamin A concentration was lowered. The pathogenesis of the disease is discussed. The long-standing typical scabies is thought to be a promoting factor for manifestation of the latent and hereditary predisposition to keratotic reaction of the skin.

Child

The eradication of a large scabies outbreak using community-wide health education.

The successful experience in eradicating a large outbreak of scabies in an underdeveloped Arabic village community in Western Galilee of about 3,000 people is reviewed. In this village the number of cases of scabies increased over a five-year period to a maximum of 22 per cent of the entire village population, representing 66 per cent of all the families. A seven-person health team with a strong background in health education was entrusted with the task of eradicating scabies in the community. A plan, conceived and carried out by the team, consisted of four phases: data gathering, information giving, treatment, and evaluation and summary. The goal of eradicating scabies in this community was achieved. The strategy of the campaign emphasized the following points: the entire community was the target group and was involved maximally throughout the campaign; the professional responsibility was concentrated in the hands of the team.

Child

Nosocomial outbreak of scabies.

Scabies is a common infestation caused by the human itch mite Sarcoptes scabiei. Small outbreaks in communities or hospitals are not uncommon, but are rarely documented. In this paper, we report on a nosocomial outbreak of scabies originating from a patient with Norwegian scabies at the Intensive Care Unit in Taiwan Provincial Tainan Hospital. Twenty-nine individuals including four inpatients and 25 hospital personnel were involved. The diagnosis was based on history, clinical findings or a positive skin scraping. Unfamiliarity with the clinical manifestations delayed the diagnosis and the highly contagious nature of Norwegian scabies precipitated this outbreak. Early initiation of effective control measures with extensive therapeutic and prophylactic treatment of all contacts resulted in successful eradication of the outbreak.

Aged

Norwegian scabies. A new complication of immunosuppressive therapy.

The second reported case of Norwegian scabies in an immunosuppressed patient is presented. This uncommon fulminant form of scabies is difficult to diagnose and may give rise to numerous secondary cases of routine scabies. Because of the current widespread use of immunosuppressive medication, it is believed that an increasing number of cases of Norwegian scabies will be seen and that an increased awareness on the part of clinicians will be necessary in order to diagnose such cases early in their course before numerous hospital personnel are infested.

Azathioprine

Scabies and other skin diseases in pre-school children in Ujamaa villages in Tanzania.

A survey of skin diseases was carried out in pre-school children in five Ujamaa villages in Rufiji district and 532 children (5.3% of the total population) were screened. The results showed that scabies was the commonest skin problem affecting 31% of the children. Primary pyoderma and fungal infections were relatively less common and accounted for 7.0 and 2.4% respectively. Staphylococcus aureus, Group A beta haemolytic streptococci and Corynebacterium diphteriae were the commonest pathogeneic bacteria isolated from both infected scabies and primary pyoderma. Tinea capitis was similarly the commonest fungal infection and Microsporium audouinii was the main pathogen. The high prevalence of scabies was attributed to poor hygiene, overcrowding with intimate personal contact. The low prevalence of pyoderma was due to the fact that we did not include secondarily infected scabies and eczema amongst the cases of pyoderma.

Child

[Epidemiological and immunological study of human scabies].

The scabies epidemy being observed since 1965, had developed from persistent endemic centres and pursues continuous the cyclic course of the scabies humanis in periods of 15 to 20 years. The intracutaneous tests with antigens of Notoedres alepis show a cross antigenity with the antigens of Sarcoptes scabiei and a sensibility of patients suffering from scabies. These tests have a diagnostical value. The antigens of Notoedres alepis are free of antigens from human epidermis.--The results support the theory of immunity for the interpretation of the cyclic course of the scabies, whereas wars and social and hygienic nuisances only have a modifying influence, and promiscuity, Sarcoptotoxicity of environment and others have no deciding importance.

Acari

Identification of a protein-binding sequence involved in expression of an esterase gene from Streptomyces scabies.

Expression of an esterase gene from Streptomyces scabies is regulated by zinc in both Streptomyces scabies and Streptomyces lividans. A specific protein-binding site was identified on an esterase promoter fragment by using an S-30 extract from S. scabies. The location of the protein-binding site was determined by gel shift assays of promoter deletion fragments and by DNase I footprinting analysis. The protein-binding site maps from nucleotides -59 to -81 relative to the start of transcription. An esterase gene construct cloned and expressed in S. lividans was used to assess the importance of the protein-binding site. Deletion of the 23-bp protein-binding site resulted in a 10-fold decrease in esterase production when cells were grown in zinc-inducing conditions. The protein-binding site may represent a region involved in positive regulation of the S. scabies esterase gene.

Amino Acid Sequence