l-Ascorbic acid functions as a precursor of oxalic acid in several oxalate-accumulating plants. The present study extends this observation to include Rumex crispus L. (curly dock), Amaranthus retroflexus L. (red root pigweed), Chenopodium album L. (lamb's-quarters), Beta vulgaris L. (sugar beet),
Certain clinical changes associated with acute oxalate (halogeton) poisoning were determined in sheep given (by stomach tube into the rumen) a lethal dose of Halogeton glomeratus. Plasma concentrations of calcium and calcium ion activity decreased over several hours to such low levels that tetany or
Acute Halogeton glomeratus poisoning occurred in 16 of 680 range cattle during and following a trail drive. Signs of toxicosis included posterior ataxia, recumbency, coma, and death. Histopathologically, abundant, refractile calcium oxalate crystals were seen in renal tubules. Inasmuch as the plant
Fourteen sheep were used on an acute halogeton toxicity feeding experiment. Seven sheep were fed a lethal dose of Halogeton glomeratus, an oxalate-producing plant, 7 served as controls. Various serum and tissue electrolytes and enzymes were measured. Sesum calcium decreased while magnesium and
Because of an episode of abortion caused by a tetracycline-resistant Campylobacter jejuni, lincomycin was mixed into a barley pellet and fed to 3,000 range ewes at a dosage of 225 mg/ewe/day. After the second feeding, a number of ewes were anorectic and diarrheic, and 6 were dead. Necropsies
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