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Atypical Presentation of Scabies Among Nursing Home Residents

^a Division of Geriatric Medicine, Saint Louis University Health Sciences Center
^b Department of Dermatology, Saint Louis University Health Sciences Center
^c GRECC, Veteran's Administration Medical Center, Saint Louis, Missouri

Margaret-Mary G. Wilson, Division of Geriatric Medicine, Saint Louis University Health Sciences Center, 1402 S. Grand Blvd, Rm M238, Saint Louis, MO 63104 E-mail: wilsonmg{at}slu.edu.

Decision Editor: John E. Morley, MB, BCh

Background. Scabies epidemics are not uncommon in nursing homes. Effective treatment is enhanced by prompt clinical diagnosis and early intervention. The clinical presentation of scabies may vary in older, immunocompromised or cognitively impaired persons.

Methods. We performed a retrospective study of all residents diagnosed with scabies in a multilevel long-term care geriatric facility. The duration of the outbreak was from May to September 2000.

Results. Fifteen residents contracted scabies during the outbreak. All affected residents had predominantly truncal lesions. Twelve residents had diffuse erythematous, papulosquamous lesions. Pruritus occurred in only 5 residents. Three residents with severe dementia and notably impaired functional status failed to respond to Permethrin cream (5%). All 3 residents responded to treatment with oral Ivermectin.

Conclusion. Older nursing home residents with scabies may present with atypical skin lesions. Residents with cognitive impairment and restricted mobility may be treatment resistant. The diagnosis of scabies should be considered in any nursing home resident with an unexplained generalized rash. Residents with dementia and severe functional impairment that fail to respond to Permethrin cream (5%) may benefit from treatment with oral Ivermectin.

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