Circulating Corticosterone Reaction to Restraint and Adrenocorticotropin Hormone Administration in White Leghorns Selected for Immune Response Traits

摘要: Abstract Corticosterone plasma concentration was measured in a random-bred control line and 3 White Leghorn chicken lines previously selected over 9 generations for different vivo immune responses: high antibody response to Newcastle disease virus vaccine wk after vaccination (ND3), cell-mediated (response phytohemagglutinin, PHA), phagocytic activity as carbon clearance (CC). The objective of the study estimate if selection on had an effect stress assessed by measures corticosterone before physical or adrenocorticotropin hormone injection dependent trait that been for, joint analyses responses concentrations. mean values did not differ between lines, indicating little stress. Within line, however, significant negative correlations (−0.46 ≤ r −0.39) were found immunity concentrations 4 lines. Moreover, titers (ND3-L), levels positively correlated ND3 (r = 0.41 0.47) negatively CC −0.48).