Journal Article

Influence of different rearing systems on natural immune parameters in broiler turkeys

M. P. Franciosini, A. Bietta, L. Moscati, L. Battistacci, M. Pela, G. Tacconi, I. Davidson and P. Casagrande Proietti

in Poultry Science

Published on behalf of Poultry Science Association Inc.

Volume 90, issue 7, pages 1462-1466
Published in print July 2011 | ISSN: 0032-5791
Published online July 2011 | e-ISSN: 1525-3171 | DOI: https://dx.doi.org/10.3382/ps.2010-01068
Influence of different rearing systems on natural immune parameters in broiler turkeys

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ABSTRACT

The aim of this study was to determine serological values of lysozyme, hemolytic complement levels (alternative pathway), and bactericidal activity of serum in turkeys kept in different rearing systems (industrial, backyard, and experimental). Results showed that the values for serum bactericidal activity and hemolytic complement levels increased with age, and their values were higher in experimental and in industrial turkeys than in turkeys reared in backyard. Lysozyme concentration showed a similar pattern; its value was higher in the industrial and experimental groups than in the backyard group. Data obtained suggest that rearing system can have an influence on the natural immune parameters considered; experimental and industrial groups showed a similar trend, differentiated from that observed in the backyard group. In the backyard group, the values observed may suggest that hybrid turkeys, selected for high production, have difficulty with being reared outside where predators (foxes and weasels) and weather conditions could be responsible for a stress situation.

Keywords: broiler turkey; natural immunity; welfare

Journal Article.  3459 words.  Illustrated.

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