Survival of Adults and Development Stages of Sarcoptes Scabiei Var. Canis When Off the Host

Exp Appl Acarol. 1989 Apr;6(3):181-7. doi: 10.1007/BF01193978.

Abstract

All life-stages of Sarcoptes scabiei var. canis survive in the hosts' environment for several days to several weeks depending on r.h. and temperature. Survival of larvae was comparable to males; survival of nymphs was comparable to females. Females and nymphs generally survived longer than larvae and males. Low temperature (10-15 degrees) and high r.h. prolonged survival of all life stages. At 10-15 degrees C, females and nymphs survived 1-3 weeks at 97% r.h., 1-2 weeks at 75% r.h. and 5-8 days at 45% r.h. At 20-25 degrees C, survival was significantly reduced but all life-stages survived at least 2 days at 25% r.h. and 5-6 days at 75-100% r.h. Long survival off the host coupled with host-seeking behavior of these mites make it likely that environmental contamination is a source of scabies in domestic and wild mammals, and in humans.

Publication types

  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Animals
  • Female
  • Humidity
  • Larva / physiology
  • Male
  • Nymph / physiology
  • Sarcoptes scabiei / physiology*
  • Temperature