Domínguez-Toraño IA, Cuquerella M, Gómez-Muñoz M, Mendez S, Fernández-Pérez FJ, Alunda JM. Vaccination of Manchego lambs against Haemonchus contortus with a somatic fraction (p26/23) of adult parasites.
Parasite Immunol 2000;
22:131-8. [PMID:
10672194 DOI:
10.1046/j.1365-3024.2000.00283.x]
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Abstract
A low molecular weight fraction from adult Haemonchus contortus containing two peptides (p26/23) was used to vaccinate Manchego female lambs between 3.5 and 5 months of age. Immunizing injections were given three times on days 0, 14 and 28 of the experiment. On day 43, lambs were challenged with 400 third stage larvae/kg live weight. Vaccination induced a lengthening of prepatent periods, significant reduction (> 60%) in mean faecal egg counts and smaller variations in packed cell volume values. At necropsy, average worm burden in the vaccinated lambs was significantly lower (61.6%) than that found in unvaccinated challenged animals. A clear correlation was found between protection and serum antibody response in immunized lambs.
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