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Year 2010 - Volume 30, Number 10
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Poisoning by organophosphate in cattle in southern Brazil, 30(10):803-806
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ABSTRACT.- Oliveira-Filho J.C., Carmo P.M.S., Pierezan F., Tochetto C., Lucena R.B., Rissi D.R. & Barros C.S.L. 2010. [Poisoning by organophosphate in cattle in southern Brazil.] Intoxicação por organofosforado em bovinos no Rio Grande do Sul. Pesquisa Veterinária Brasileira 30(10):803-806. Departamento de Patologia, Universidade Federal de Santa Maria, Camobi, Santa Maria, RS 97105-900, Brazil. E-mail: claudioslbarros@uol.com.br
An outbreak of organophosphate (ORF) poisoning in cattle occurred in the central-midwestern region of Rio Grande do Sul, Brazil. The water available for 49 cattle was contaminated with ORF and carbamate (CM). Twenty cows died after a clinical course that lasted for few hours. The classical clinical signs of over stimulation of the parasympathetic nervous system were observed, including motor incoordination, aggressiveness, drooling, muscle tremors and, on occasion, diarrhea. Significant morphological changes were not observed at necropsy or at histopathological examination. ORF e CM were detected by thin layer chromatography in tissue samples of two affected cattle and in a sample from the water consumed by the affected cattle. Additionally, two other water samples accessed by the affected cattle were positive for ORF. A quantitative analysis carried out by gas chromatography in the abomasum contents of an affected cow revealed 0.93µg/g of mancozebe (CM) and 0.07µg/g of phorate (ORF). |
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