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International Journal of Poisonous Plant Research






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Historically, the most significant losses from halogeton poisoning have been reported in sheep, with multiple catastrophic deaths documented. While recorded death losses in cattle from halogeton poisoning are less common than in sheep, recent cases, including 2 reported here, and anecdotal reports from other ranchers suggest that the impact of halogeton losses in cattle herds in the western United States is much more widespread than originally thought. Halogeton may accumulate up to 30% oxalates; a small amount of the plant (300 g) is enough to cause death in sheep. Oxalates precipitate calcium from the blood, resulting in hypocalcemia, formation of calcium oxalate crystals, and uremia. In this report, 2 cases of halogeton poisoning in cattle are documented, including a history of halogeton grazing, supportive oxalate analysis of plants collected from the poisoning locations, and histological evidence of classic oxalate nephropathy and calcium oxalate crystal nephrosis.

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