Exposure to Psoroptes sp. mites is common among bighorn sheep (Ovis canadensis) populations in California.

Jonna A Mazet, Walter M Boyce, J. Mellies, Ian Gardner, R. K. Clark, D. A. Jessup

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Abstract

Sera (n = 806) from 50 populations of bighorn sheep (Ovis canadensis) in California (USA) were evaluated for antibodies to Psoroptes sp. mites using a kinetic enzyme-linked immunosorbent assay (ELISA). Test values for each sample were determined to be either positive or negative at each of two ELISA cutoff values that provided either 100% sensitivity (low cutoff) or 100% specificity (high cutoff), respectively. One hundred sixty-eight (20.8%) sera were seropositive at the low cutoff value, and 87 (10.8%) of these sera also were seropositive at the high cutoff value. Eleven populations were designated as scabies-suspect and 25 populations were designated as scabies-positive because they had at least one seropositive animal at the low and the high cutoff values, respectively. Based on these results, exposure to Psoroptes sp. mites appeared to be widely distributed among bighorn sheep populations from 1980 to 1990 and infested animals may have been present prior to 1980.

Original languageEnglish (US)
Pages (from-to)542-547
Number of pages6
JournalJournal of Wildlife Diseases
Volume28
Issue number4
StatePublished - Oct 1992

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Bighorn Sheep
Psoroptidae
Psoroptes
Ovis canadensis
Mites
mite
sheep
mites
serum
Scabies
scabies
assay
enzyme
Population
animal
Serum
Enzyme-Linked Immunosorbent Assay
enzyme-linked immunosorbent assay
antibody
kinetics

ASJC Scopus subject areas

  • veterinary(all)

Cite this

Exposure to Psoroptes sp. mites is common among bighorn sheep (Ovis canadensis) populations in California. / Mazet, Jonna A; Boyce, Walter M; Mellies, J.; Gardner, Ian; Clark, R. K.; Jessup, D. A.

In: Journal of Wildlife Diseases, Vol. 28, No. 4, 10.1992, p. 542-547.

Research output: Contribution to journalArticle

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abstract = "Sera (n = 806) from 50 populations of bighorn sheep (Ovis canadensis) in California (USA) were evaluated for antibodies to Psoroptes sp. mites using a kinetic enzyme-linked immunosorbent assay (ELISA). Test values for each sample were determined to be either positive or negative at each of two ELISA cutoff values that provided either 100{\%} sensitivity (low cutoff) or 100{\%} specificity (high cutoff), respectively. One hundred sixty-eight (20.8{\%}) sera were seropositive at the low cutoff value, and 87 (10.8{\%}) of these sera also were seropositive at the high cutoff value. Eleven populations were designated as scabies-suspect and 25 populations were designated as scabies-positive because they had at least one seropositive animal at the low and the high cutoff values, respectively. Based on these results, exposure to Psoroptes sp. mites appeared to be widely distributed among bighorn sheep populations from 1980 to 1990 and infested animals may have been present prior to 1980.",
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AU - Clark, R. K.

AU - Jessup, D. A.

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