The recognition of a possible intoxication and the identification of specific toxicants can be challenging, especially in the absence of historical clues to specific toxicant exposure. Obtaining a comprehensive history that includes possible toxicants in a horse’s environment is critical. The mere presence of a toxicant, however, does not mean that there has been exposure to the compound. Evidence of exposure, occurrence of compatible clinical signs, and possible laboratory testing are necessary components to a toxicologic diagnosis.
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