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First Case of Chronic Copper Toxicosis in Dairy Cows in Israel and its Remedial Management
Barel S., Cuneah O., Sharir B...
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Chronic copper toxicosis in cattle has never been reported in Israel and very rarely abroad. Chronic copper toxicity in cattle results mostly from the ingestion of high copper containing feeds, or due to accidental administration of excessive amounts of soluble copper salts. In February of 2015, the complete feed for lactating Holstein-Friesian dairy herd was accidently supplemented with 250 mg copper /kg complete feed. By June of 2015, clinical signs of copper intoxication occurred in several cows followed by sudden death of twenty cows within 4 days. The mean liver and kidney copper level was 405±120 mg/kg and 29±16 mg/kg, respectively. The remaining herd was treated with 200 mg/cow/day of sodium molybdenum for 7 days added to the new feed from which the copper supplement has been removed. Subsequently, sodium molybdenum supplement was terminated and the herd was further fed on complete feed lacking any copper supplements for several months. About 2-3 months after the remedial management of the dairy herd, a full recovery of the animals was observed, with milk production and body condition returning to normal. The molybdenum therapy achieved a 50% reduction in mean liver copper level. In contrast, the mean kidney copper level was reduced to normal levels only 2-3 months post treatment. It was concluded that chronic copper poisoning of dairy cows can be successfully treated by the removal of all copper supplements from feed and oral administration of 200 mg molybdenum/cow/day, thereby reducing liver and kidney levels within 2-3 months to normal values. ...
Copper; Liver; Kidney; Chronic Copper Toxicity; Sodium Molybdenum
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Affiliation of the authors at the time of publication
Department of Toxicology, Kimron Veterinary Institute, 50250 Bet Dagan, Israel. Department of Pathology, Kimron Veterinary Institute, 50250 Bet-Dagan, Israel. Hachaklait Veterinary Services, Caesarea Industrial Park 38900, Israel. Department of Food Quality & Safety, Institute for Postharvest and Food Sciences, Agricultural Research Organization, Volcani Center, Rishon Letzion, 7528809, Israel.
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The Israel Journal of Veterinary Medicine is available as an open, online journal for veterinarians worldwide.
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