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There are two forms of bovine spongiform encephalopathy (BSE, the scientific name for mad cow disease): infectious and spontaneous. The infectious form is what caused the problems in the 1990s, and this form was often transmitted via the feed. The spontaneous form, which is the only form the world is currently seeing due to a ruminant-to-ruminant feed ban, occurs randomly in older cattle.

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13y ago

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