Epidemiologic aspects of bovine anaplasmosis in semiarid range conditions of south central Idaho.

John Maas, S. D. Lincoln, M. E. Coan, K. L. Kuttler, J. L. Zaugg, D. Stiller

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The prevalance of Anaplasma marginale-infected cows, as determined by use of the modified rapid card agglutination (MRCA) test, was measured during a 4-year period (1980-1983). The prevalence of A marginale-infected cows, defined as positive reactors on the MRCA test, remained constant (31%-37%). The apparent incidence of A marginale transmission to susceptible cows was approximately 7% from 1980 to 1981, 8% from 1981 to 1982, and no transmission from 1982 to 1983. The occasional MRCA-positive cow became negative on the MRCA test, and 1 cow was determined to be free of A marginale infection by subinoculation of 100 ml of the cow's blood into a susceptible, splenectomized calf. Dermacentor andersoni, a known vector of A marginale, was often found on the cattle and in their environment. However, A marginale was not transmitted to susceptible, splenectomized calves, using collected ticks. Of 56 calves born to MRCA-positive cows, 82% were MRCA-positive within the first 3 months of life. These calves converted to MRCA-negative status and were determined to be free of A marginale infection by subinoculation of their blood into susceptible, splenectomized calves, indicating the passive transfer of colostral antibodies.

Original languageEnglish (US)
Pages (from-to)528-533
Number of pages6
JournalAmerican Journal of Veterinary Research
Volume47
Issue number3
StatePublished - Mar 1 1986
Externally publishedYes

Fingerprint

bovine anaplasmosis
Anaplasmosis
Agglutination
Agglutination Tests
cows
agglutination
calves
agglutination tests
Anaplasma marginale
Dermacentor
Passive Immunization
Ticks
Infection
Dermacentor andersoni
blood
Incidence
infection
ticks
incidence
antibodies

ASJC Scopus subject areas

  • veterinary(all)

Cite this

Maas, J., Lincoln, S. D., Coan, M. E., Kuttler, K. L., Zaugg, J. L., & Stiller, D. (1986). Epidemiologic aspects of bovine anaplasmosis in semiarid range conditions of south central Idaho. American Journal of Veterinary Research, 47(3), 528-533.

Epidemiologic aspects of bovine anaplasmosis in semiarid range conditions of south central Idaho. / Maas, John; Lincoln, S. D.; Coan, M. E.; Kuttler, K. L.; Zaugg, J. L.; Stiller, D.

In: American Journal of Veterinary Research, Vol. 47, No. 3, 01.03.1986, p. 528-533.

Research output: Contribution to journalArticle

Maas, J, Lincoln, SD, Coan, ME, Kuttler, KL, Zaugg, JL & Stiller, D 1986, 'Epidemiologic aspects of bovine anaplasmosis in semiarid range conditions of south central Idaho.', American Journal of Veterinary Research, vol. 47, no. 3, pp. 528-533.
Maas, John ; Lincoln, S. D. ; Coan, M. E. ; Kuttler, K. L. ; Zaugg, J. L. ; Stiller, D. / Epidemiologic aspects of bovine anaplasmosis in semiarid range conditions of south central Idaho. In: American Journal of Veterinary Research. 1986 ; Vol. 47, No. 3. pp. 528-533.
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