Scabies Flashcards

1
Q

Etiology of scabies

A

Mite: sarcoptes scabiei var. hominis

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2
Q

What layer of the epidermis is the burrow in

A

Normally just the stratum corneum except in Norwegian scabies

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3
Q

Scybala

A

Scabies poop that may be part of the irritant associated with itching (hypersensitivity rxn)

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4
Q

Timeline

A

Usually limited itching in the first month of infestation as number of mites increases

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5
Q

Clinical manifestations

A

Burrows (wrists, finger webs, scrotum, anal region) and discrete vesicles causing nocturnal pruritus

  • if vesicles on palms and soles in infant think scabies
  • nodules are indicative of longterm infection and may persist after treatment (need ILK often)
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6
Q

Patient characteristic in crusted scabies

A
Neurologic/mental disorders (Down syndrome)
Senile dementia
nutritional disorders
Leukemia
Immunosuppressed conditions (AIDS)
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7
Q

Treatment options

A

Permethrin (2 applications 1 week apart applied to dry skin for 8-12 hours before washing)
2nd line: Lindane or oral ivermectin

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8
Q

Post Scabietic pruritus

A

Often pruritus gradually decreases 1-2 weeks after treatment but should see dramatic improvement after initial treatment

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