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Beta-1,3-glucan effect on sow antibody production and passive immunisation of progeny

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-glucans are glucose homopolymers known to modulate immunity. Here, the -glucan effect on sow antibody production and passive immunisation of neonatal pigs was analysed. Treatments included: (1) corn-soy fed Control group; (2) -glucan; (3) Actinobacillus pleuropneumoniae (App) vaccination; and (4) -glucan + App vaccination. Birth and weaning weights were not affected (P>0.05) by treatment. Independent of treatment, IgA, IgG and IgM in colostrum were elevated and declined rapidly. Vaccination against App resulted in an increase (P<0.05) in IgG and IgA specific for App serotypes 1, 5 and 7 in colostrum and milk, and a corresponding increase (P<0.05) in serum in pigs at 4 d of age. However, -glucan did not enhance specific App antibodies in pig serum. While the dosage used here did not enhance passive immunisation in pigs, -glucan can be potentially efficacious as an oral adjuvant to enhance immunoglobulin production in response to vaccination.
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Keywords: colostrum; passive immunisation; pig; -glucan

Document Type: Research Article

Affiliations: 1: Department of Animal and Wildlife Sciences, College of Agriculture and Human Sciences, Texas A&M University-Kingsville, Kingsville, TX, USA 2: Texas AgriLife Research, Texas A&M University, College Station, TX, USA 3: USDA-ARS Livestock Issues Research Unit, Lubbock, TX, USA

Publication date: September 1, 2009

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