The present disclosure relates to a casein peptide for use in the treatment of an uterine infection in a female mammalian animal to methods of treatment of such infections by administering to a female mammalian animal at least one casein peptide to the use of casein peptide for the preparation of a pharmaceutical composition for treatment of uterine infection and to a kit for said treatment. The casein peptide is preferably a casein hydrolysate e.g. obtained by trypsin hydrolysis of casein protein. The female mammalian animal is in accordance with some embodiments a lactating animal the infection being a post-partum infection.
