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  • Title: Cross-bred cattle protected against Hyalomma anatolicum anatolicum by larval antigens purified by immunoaffinity chromatography.
    Author: Ghosh S, Khan MH, Ahmed N.
    Journal: Trop Anim Health Prod; 1999 Oct; 31(5):263-73. PubMed ID: 10509419.
    Abstract:
    Antigens from larvae of Hyalomma anatolicum anatolicum were extracted and purified by immunoaffinity chromatography using immunoglobulin ligands from cross-bred animals immunized with soluble larval antigen. Affinity-purified antigen (Aff-TLE) and a total larval extract (TLE) were used to immunize cross-bred (Bos indicus x Bos taurus) cattle. The group immunized with Aff-TLE rejected 71.6% of larvae and 77.3% of nymphs. However, the rejection percentages were lower in the TLE-immunized group. No significant changes in the feeding period, moulting percentages or moulting period of engorged larvae and nymphs were recorded. There was, however, a significant decrease in the number of resultant nymphs p < 0.01) and adults (p < 0.01) in the ticks fed on the Aff-TLE-immunized group. The Aff-TLE antigen was 93.3% purified. SDS-PAGE analysis identified a 39 kDa protein, reported for the first time, as the antigen responsible for the induction of resistance in the host.
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