Houndstongue (Cynoglossum officinale), a noxious weed that contains pyrrolizidine alkaloids (PAs), infests pastures and fields in the western United States and Europe. The purpose of this study was to develop techniques to better diagnose PA poisoning and describe the progression of gross and
Cynoglossum officinale L. (family Boraginaceae), hound's-tongue, is a medicinal plant whose roots are used for their astringent and healing properties and for their sedative, calming, and slightly narcotic effects. This species, originating from Europe where it grows wild in mountainous fields, is
Six calves were given dried, ground Cynoglossum officinale daily in a dose which provided 15 (two calves) or 60 (four calves) mg per kg per day of total pyrrolizidine alkaloids. Those calves given 60 mg per kg of total pyrrolizidine alkaloids per day died following a single dose of plant material.
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