Antibody Responses to Psoroptes sp. Mites in Dall Sheep (Ovis dalli)

Walter M Boyce, Randall L. Zarnke

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We determined that antibody responses to Psoroptes sp. mites were not present in 403 of 407 sera samples collected opportunistically from 1979 through 1991 from Dall sheep (Ovis dalli) from five locations in Alaska, USA (Eastern Arctic, n = 61; Central Arctic, n = 15; Western Interior, n = 122; Central Interior, n = 63; Eastern Interior, n = 146). Test values for four samples exceeded the positive cutoff value for the immunoassay, but exposure to mites could not be confirmed since the 95% confidence interval for true prevalence ranged from 0 to 2.3%. Therefore, we concluded that these were probably false positive results. Our analysis, coupled with the lack of previous reports of mites or lesions in Dall sheep or other Alaskan ungulates, provided indirect evidence that Psoroptes sp. are not enzootic in Dall sheep in Alaska. In contrast, Psoroptes sp. have been reported in bighorn sheep (Ovis canadensis) and other wild ungulate populations from southern Canada to Mexico. These findings are compatible with the hypothesis that Psoroptes sp. were introduced into North America with imported domestic sheep and were not introduced by ancestral wild sheep.

Original languageEnglish (US)
Pages (from-to)711-713
Number of pages3
JournalJournal of Wildlife Diseases
Volume32
Issue number4
StatePublished - Oct 1996

Fingerprint

Psoroptidae
Psoroptes
Ovis dalli
Mites
mite
sheep
antibody
Antibody Formation
mites
Sheep
Bighorn Sheep
Ovis canadensis
antibodies
ungulates
Arctic region
ungulate
Domestic Sheep
immunoassays
lesions (animal)
confidence interval

Keywords

  • Biogeography
  • Mites
  • Ovis sp. Psoroptes sp.
  • Serology

ASJC Scopus subject areas

  • veterinary(all)

Cite this

Antibody Responses to Psoroptes sp. Mites in Dall Sheep (Ovis dalli). / Boyce, Walter M; Zarnke, Randall L.

In: Journal of Wildlife Diseases, Vol. 32, No. 4, 10.1996, p. 711-713.

Research output: Contribution to journalArticle

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