Factors associated with an excellent transfer of passive immunity: multisite, cross-sectional study conducted in different European countries on dairy cattle.

ABSTRACT: Transfer of passive immunity (TPI) is key to achieving a good immunity status in newborn calves. The traditional scientific approach examines risk factors for the failure of TPI, but the benefits of achieving an excellent transfer of passive immunity are well recognized, justifying a closer examination of specific influencing factors. However, there is scarce information about conditions related to an excellent TPI, which may differ from those avoiding failure. Therefore, the objective of this work was to detect factors determining an excellent transfer of passive immunity. From April to July 2022, 1,041 calves from 108 European farms from six countries were studied. Colostrum quality and level of passive immunity in calves were indirectly measured with refractometry. Data of colostrum man

SUBMITTER: Fernandez-Novo A 

PROVIDER: S-EPMC11894572 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature