Abstract
The present study was carried out in order to evaluate the immunomodulator effect of E.coli lipopolisacharide and inactivated cells of Propionibacterium granulosum applied in mares in the last stage of gestation. Serum IgG and IgM concentration was evaluated in colts after calostrum consume. Morbility, mortality and weighs at day old and post weaning were evaluated. Positive effect of the product was observed under the condition of this study.