Method of treating a bacterial infection using colostrum

A method of treating a bacterial infection using colostrum, comprising:

• providing a therapeutically effective amount of lyophilized colostrum, the lyophilized colostrum made by:
• collecting colostrum from the mammary gland of a mammal;
• freezing the colostrum at a temperature of at least −20° C. for at least a week;
• thawing the colostrum for at least 8 hours;
• lyophilizing the colostrum;
• and
• suspending the lyophilized colostrum in a saline solution to provide a colostrum composition;
• identifying a subject in need of immune stimulation, and
• administering the therapeutically effective amount of the lyophilized colostrum to said subject;
• wherein the administration of the lyophilized colostrum results in an increase in the circulating levels of one or more immune system cytokines.