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Population Genetics and Systematics of the Sheep Scab Mite, Psoroptes ovis

Genetic variation has been studied at the species and population level in these parasites using DNA sequencing and microsatellite analyses, in combination with classical morphological taxonomic methods; a suite of microsatellite markers have been developed and published (Evans et al. 2003, Mol. Ecol. Notes - see publications). Results have allowed an improved understanding of the genetics and taxonomy of the genus, and the spread of sheep scab. This work forms part of a long-running collaboration with the Bristol Insect Ecology Group and EU COST Action 833 on mange and myiasis in livestock. Click here to view recent publications.


  • Evans L.M., Dawson D.A., Wall R., Burke T. & Stevens J. (2003)  Isolation of Psoroptes scab mite microsatellite markers (Acari: Psoroptidae). Molecular Ecology Notes, 3: 420-424. [View PDF]
  • Pegler, K.R., L. Evans, J.R. Stevens & R. Wall (2005) Morphological and molecular comparison of host-derived populations of parasitic Psoroptes mites.  Medical and Veterinary Entomology, 19: 392-403. [View PDF]


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