Abstract
Adult cows from an Anaplasma marginale-infected herd that were negative to the A marginale rapid card agglutination (RCA) and complement fixation (CF) tests for 1 to 4 years developed acute anaplasmosis after inoculation with 0.5 ml of blood from an A marginale carrier cow. The test cattle were as susceptible as the control cattle of similar ages. Also, 2 cows that had seroconverted from RCA/CF-positive to RCA/CF-negative status naturally were fully susceptible to anaplasmosis when they were experimentally infected. Results of the study indicated that indigenous seronegative cattle in anaplasmosis-enzootic regions probably do not have acquired or natural immunity to A marginale infection.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 171-173 |
| Number of pages | 3 |
| Journal | Journal of the American Veterinary Medical Association |
| Volume | 190 |
| Issue number | 2 |
| State | Published - Jan 15 1987 |
| Externally published | Yes |
ASJC Scopus subject areas
- veterinary(all)
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Lincoln, S. D., Zaugg, J. L., & Maas, J. (1987). Bovine anaplasmosis: susceptibility of seronegative cows from an infected herd to experimental infection with Anaplasma marginale. Journal of the American Veterinary Medical Association, 190(2), 171-173.