Background and Purpose: Enteral applied bovine colostrum can significantly reduce endotoxin concentration in plasma. Since colostrum is a mixture of biological active ingredients 3 possible substances which are able to influence the endotoxin elimination were concentrated in 3 different colostrum products. Immunoglobulin-, lactoferrin- and casein-enriched colostra and lactoferrin alone were orally administered to endotoxinaemic rats. Methods: Endotoxinaemia was induced to rats by enteral application of 1010E. coli together with 40 mg Nebacetin. Control animals received albumin. From all rats plasma samples were taken over the time of 5 h and endotoxin concentration determined with limulus lysate and chromogenic substrate. Results: Whereas in control animals as well as in animals treated with casein-enriched colostrum a marked increase of endotoxin values to over 130 EU/dl could be observed after 5 h, the oral application of gammaglobulin-enriched and especially lactoferrin-enriched colostrum decreased endotoxin values by more than 50%. The most effective endotoxin elimination was seen with lactoferrin alone. Conclusions: From this results it can be concluded that not only gammaglobulin but especially lactoferrin seems to be responsible for the elimination of endotoxin with regard to enterally applied colostrum preparations.

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