brookcove
Posted : 1/31/2007 4:20:06 PM
We feed IgA supplements to colostrum-deprived lambs to try to counteract the lack of immunity. Unlike most mammals, lambs get NO immunity from mama apart from colostrum and that window closes very fast. Mammals can't absorb antibodies after a certain window after birth - it's a function of how porous the small intestines are to this material. The "holes" close quickly after the neonate starts feeding to protect the animal from invasion. Thus as Misskiwi mentioned colostrum or other antibody supplements administered orally are good for helping the GI but not much else.
However, coincidentally, my friend who works at NIH is working on this exact question. They've uncovered some exciting evidence that some of these proteins DO survive into the bloodstream. This would be marvelous news for both neonates and hemophiliacs, for whom a single needle prick is a life-threatening situation.
So, back to the old vet standby reply on the subject of animal plasma. "Can't hurt!" LOL. And who knows, science may find out that it DOES do some good? [sm=wink2.gif]