| abstract |
Pharmaceutical compositions are provided for preventing and/or treating broodiness in birds, particularly turkeys, and comprise, as the active ingredient, either a hybrid molecule consisting of a carrier group and a protein including at least one prolactin epitope, or a microorganism expressing said hybrid molecule on its surface or excreting it, or else antibodies to at least one antigenic prolactin site. Methods for preparing said pharmaceutical compositions are also provided. |