Babesia bigemina,Babesia argentina, and Anaplasma marginale: Coinfectious immunity in bovines |
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| Authors: | RA Todorovic EF Gonzalez LG Adams |
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| Institution: | 1. Departments of Veterinary Microbiology and Pathology, and Institute of Tropical Veterinary Medicine, College of Veterinary Medicine, Texas A&M University, College Station, Texas 77843 USA;2. The Instituto Colombiana Agropecuario, Apartado Aereo 233, Palmira, Colombia, South America USA |
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| Abstract: | Forty-eight intact and eight splenectomized cattle were used to evaluate different systems of coinfectious immunization against Babesia bigemina, Babesia argentina, and Anaplasma marginale. Coinfectious immunity was induced by two methods: (1) blood of cattle acutely infected with B. bigemina, B. argentina and A. marginale was used as the source of inoculum and the post vaccination reactions were chemotherapeutically controlled with Imidocarb, Ganaseg, Gloxazone, and Liquamycin, and (2) by artificially inducing babesiosis with the blood of carrier cattle with chronic infections of B. bigemina and B. argentina without chemotherapy. The degree of resistance was determined by bloodborne and tick-borne challenges. Ticks were collected from cattle and identified as Boophilus microplus and Dermacentor nitens. Vaccinated cattle demonstrated a high degree of resistance to babesiosis and anaplasmosis; however, cattle without coinfectious immunity were treated chemotherapeutically to prevent death losses. |
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| Keywords: | Hemotropic diseases Cattle Vaccination Coinfectious immunity Ticks Complement-fixation test Splenectomy Chemotherapy |
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