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exclusion principlethe principle that two species with the same ecological requirements cannot exist together.
a shutting out or elimination; surgical isolation of a part, as of a segment of intestine, without removal from the body.
competitive exclusion (CE)
a term used to describe the protective effect of the natural or native bacterial flora of the intestine in limiting the colonization of some bacterial pathogens. Competitive exclusion products are also called probiotics, direct-fed microbials or CE cultures.
it is possible to prove from a parentage test that a particular animal is not the true parent but it is impossible to prove that a particular animal is a parent.