Dermacentor hunteri (Acari: Ixodidae): An experimental vector of Anaplasma marginale and A. ovis (Rickettsiales: Anaplasmataceae) to calves and sheep

David Stiller, Paul R. Crosbie, Walter M Boyce, Will L. Goff

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

The experimental vector competence of laboratory-reared Dermacentor hunteri Bishopp for Anaplasma marginale Theiler and Anaplasma ovis Lestoquard was evaluated by delayed transfer of male ticks from infected to susceptible Holstein calves and from infected to susceptible domestic sheep, respectively. After feeding for 4 or 5 d on rickettsemic acquisition hosts, the ticks were held off the host at 26°C, ≈93% RH, and a photoperiod of 14:10 (L:D) h for 7 or 8 d, then test fed for 5 or 7 d. Additionally, ticks test-fed for 5 d on 2 susceptible calves were removed, held off the host for 7 d, and test-fed for 5 d on a 3rd susceptible calf to test the tick's ability to transmit A. marginale by delayed serial transfer. Tick transmission of A. marginale to 3 test calves and A. ovis to 3 test sheep was demonstrated by blood smear and indirect immunofluorescence serology. These data indicate that males of D. hunteri, a tick commonly found on desert bighorn, Ovis canadensis Shaw, in the southwestern United States and northern Mexico, may be competent natural vectors of these organisms present in desert bighorn populations.

Original languageEnglish (US)
Pages (from-to)321-324
Number of pages4
JournalJournal of Medical Entomology
Volume36
Issue number3
StatePublished - May 1999

Keywords

  • Anaphisma ovis
  • Anaplasma marginale
  • Dermacentor hunteri
  • Experimental vector competence
  • Intrastadial transmission

ASJC Scopus subject areas

  • Insect Science
  • veterinary(all)

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