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Sarna - Overview

Nombres alternativos

Sarcoptes scabiei

Definición:

Es una enfermedad cutánea de fácil propagación causada por una especie de ácaro muy pequeño.

Causas, incidencia y factores de riesgo:

La sarna se encuentra en todo el mundo en individuos de todas las razas y edades; se transmite por contacto directo con personas infectadas y con menos frecuencia, al usar la misma ropa o al compartir la ropa de cama. En ocasiones, se contagian familias enteras.

Los brotes de sarna son más comunes en asilos u hogares de ancianos y guarderías.

Los ácaros que causan la sarna excavan la piel y depositan los huevos, formando un agujero que se parece a una marca de lápiz. Los huevos maduran en 21 días. La erupción pruriginosa es una respuesta alérgica a los ácaros.

La sarna se propaga por contacto de piel a piel con otra persona que la tenga.

Las mascotas y animales no pueden propagar la sarna humana. También es muy improbable que la sarna se propague por:

  • Una piscina.
  • Contacto con toallas, ropa de cama y prendas de vestir de alguien que tenga sarna, a menos que la persona padezca lo que se denomina "sarna costrosa".
  • Reviewed last on: 10/4/2010
  • Linda J. Vorvick, MD, Medical Director, MEDEX Northwest Division of Physician Assistant Studies, University of Washington School of Medicine. Also reviewed by Kevin Berman, MD, PhD, Atlanta Center for Dermatologic Disease. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

Referencias

Habif TP, ed. Clinical Dermatology. 5th ed. Philadelphia, Pa: Mosby Elsevier;2009:pp 582-589.

Diaz JH. Scabies. In: Mandell GL, Bennett JE, Dolin R, eds. Mandell, Douglas, and Bennett's Principles and Practice of Infectious Diseases. 7th ed. Philadelphia, Pa: Churchill Livingstone Elsevier;2009:chap 294.

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