IgA, IgG, and anti-Pasteurella multocida antibody levels in bursectomized and/or cyclophosphamide-treated turkeys after CU vaccination
1993
Schlink, G.T. | Olson, L.D. | Saif, Y.M. | Jackwood, D.J.
In bursectomized, cyclophosphamide-treated, and bursectomized/cyclophosphamide-treated turkeys, IgA, IgG, and anti-Pasteurella multocida were determined before and after vaccination with the Clemson University (CU) strain of P. multocida. Before vaccination, the average total serum level of IgA was significantly (P < 0.05) lower in bursectomized and bursectomized/cyclophosphamide-treated turkeys than in untreated controls, and the average serum levels of anti-P. multocida were significantly (P < 0.05) lower in bursectomized, cyclophosphamide-treated, and bursectomized/cyclophosphamide-treated turkeys than in untreated controls. After vaccination, average serum IgA levels were still significantly (P < 0.05) lower in all treated groups of turkeys than in the untreated controls. Also after vaccination, total IgG increased significantly (P < 0.05) only in the bursectomized turkeys, and serum anti-P. multocida antibody levels increased significantly (P < 0.05) in cyclophosphamide-treated, bursectomized/cyclophosphamide-treated, and untreated turkeys. After challenge with virulent P. multocida, survivability was significantly (P < 0.05) lower in the three treated groups of turkeys than in the untreated groups.
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