Periódicos Brasileiros em Medicina Veterinária e Zootecnia

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Intoxicação aguda por fluorsilicato de sódio em bovinos

Panziera, WeldenSchwertz, Claiton IsmaelSilva, Fernando Soares daTaunde, Paula AugustoPavarini, Saulo PetinattiDriemeier, David

Background: Fluorine is a ubiquitous environmental element and fluoride poisoning in cattle is usually related to the ingestion of contaminated pastures or water, especially near industries, or mineral supplements with excessive amounts of this element. Cattle poisoning can be acute or chronic and is directly associated with the ingested dose and with the duration of exposure. The objective of this study is to report the epidemiological, clinical and anatomopathological aspects of an outbreak of acute sodium fluorosilicate intoxication in cattle.Case: Six 1-year-old, castrated male, mixed breed beef calves from a lot of 60 were found dead without previous clinical signs being observed. The calves died after ingesting a white, odorless, finely granular substance found by the owner near a road that intersected the property. The product was in an open package and identified as sodium fluorosilicate. Of the six dead calves, three were necropsied. Gross lesions were restricted to the digestive system and included varying degrees of hyperemia, hemorrhage, edema, and erosions in the pre-stomach and abomasum mucosae. The histological lesions observed in the three calves were characterized mainly by variable degenerative, necrotic and ulcerative changes in the epithelial lining of the forestomachs and abomasum. Partially (erosion) or totally (ulceration) bare lamina propria of forestomach papillae was covered by cellular debris and neutrophils. Multifocal lymphoid necrosis was seen in lymph nodes and spleen. Fluoride levels measured in the ruminal content of two necropsied calves were 55.2 and 9.17 mgF/kg of dry matter. After the diagnosis and discontinued exposure of the calves to the fluoride product, deaths ceased.Discussion: The diagnosis of acute sodium fluorosilicate intoxication in cattle in this study was based on epidemiological, clinical, and anatomopathological findings, and in the determination of fluoride levels in ruminal content.[...](AU)

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