TGFbeta and EGF. Substances such as lactose, fats, casein and lactalbumin are significantly reduced in microfiltered bovine colostrum. Hyperimmune bovine colostrum is rich in immunoglobulins of the IgG type, which are protective against such infectious microorganisms as Cryptosporidium parvum (a major cause of AIDS-associated diarrhea), diarrheogenic Escherichia coli strains, Shigella flexneri, Clostridium difficile, and rotavirus, the most common cause of severe diarrhea in young children.Hype