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Year 2014 - Volume 34, Number 12
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Poisoning of sheep that received two treatments of closantel in a therapeutic dose (7.5mg/kg), with an interval of 28 days, 34(12):1162-1166
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ABSTRACT.- Lopes W.D.Z., Carvalho R.S., Oliveira P.V., Pereira V., Martinez A.C., Mazucatto B.C., Colli M.H.A. & Ruivo M.A. 2014. [Poisoning of sheep that received two treatments of closantel in a therapeutic dose (7.5mg/kg), with an interval of 28 days.] Intoxicação de ovinos que receberam duas aplicações de closantel, na dosagem terapêutica (7,5mg/kg), com intervalo de 28 dias. Pesquisa Veterinária Brasileira 34(12):1162-1166. Departamento de Medicina Veterinária, Universidade Estadual de Maringá, Campus Regional de Umuarama, Rodov. PR-489 nº 1.400, Umuarama, PR 87508-210, Brazil. E-mail: wdzlopes@hotmail.com
This study reports poisoning in sheep wich have received two applications of closantel in therapeutic dosage (7.5mg/kg) within a preestablished 28-day period for effectiveness formulation. A high percentage of efficiency was observed after the first and second treatment, but around 72 hours after the second administration of closantel (D30), three sheep have showed mild apathy, anorexia, diarrhea, bilateral blindness, and dilated pupils without reaction. These three animals, were observed in the following 250 days, and the bilateral blindness remained. Numerous reports of animals poisoned by closantel emphasize that overdose and/or nutritional status of the animals are key factors to occur poisoning due closantel administration. However, in this experiment the signs of poisoning (mild apathy, anorexia, diarrhea and ophthalmic disturbance), observed in the three clinically healthy sheep, occurred when they received two applications of closantel (7.5mg/kg), in a interval of 28 days, highlighting the fact of obtaining a cumulative residual effect of closantel in the animal organism, caused by two consecutive applications, may also be a predisposing factor for sheep to demonstrate irreversible signs of intoxication. |
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