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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Tropical animal health and production 31 (1999), S. 263-273 
    ISSN: 1573-7438
    Keywords: antigen ; cattle ; Hyalomma anatolicum anatolicum ; immunization ; immunoaffinity ; larvae ; protection ; 39 kDa protein
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: 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×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.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Experimental and applied acarology 24 (2000), S. 645-659 
    ISSN: 1572-9702
    Keywords: cattle ; gut antigen ; Hyalomma anatolicum anatolicum ; immunization ; immunoaffinity ; larval extract ; protection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Extracts prepared from unfed larvae of Hyalomma anatolicum anatolicum were purified by immunoaffinity chromatography using anti-gut IgG as ligand. Affinity purified antigen (Aff-GHLAg) was used to immunize cross-bred (Bos taurus × B. indicus) calves of 6–7 months of age. Immunized calves rejected 70.6% larvae, 54.5% nymphs and 61.9% adults. No significant changes in the engorged weight of females was observed; however, significant decrease in the engorgement weight of larvae and nymphs was recorded. There was a significant decrease in the emerging nymphs (p 〈 0.05) and adults (p 〈 0.01) of the tick stages fed on immunized animals. SDS-PAGE analysis revealed three antigenic proteins of 100, 59.4 and 37 kDa responsible for induction of resistance in the host.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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