2010
DOI: 10.1590/s0100-736x2010000800001
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Surto de polioencefalomalacia por ingestão excessiva de enxofre na dieta em bezerros no Rio Grande do Sul

Abstract: 613Pesq. Vet. Bras. 30(8):613-617, agosto 2010 RESUMO.-Neste trabalho descreve-se surto de polioencefalomalacia em bovinos decorrente da ingestão de dieta com excessiva concentração de enxofre em uma propriedade no Rio Grande do Sul. O lote era composto por 30 bezerros, mantidos em um piquete com azevém (Lolium multiflorum) e suplementados com ração e sal mineral. Seis bezerros morreram e dois deles foram necropsiados; amostras de tecido hepático para dosagem de chumbo e fragmentos do sistema nervoso centra… Show more

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Cited by 8 publications
(16 citation statements)
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References 26 publications
(31 reference statements)
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“…The consumption of sulfate-rich water by ruminants increases the risk of thiamine-responsive PEM , and sulfur intoxication (EDWARDS; GREGORY, 1991;COPPOCK;CHRISTIAN, 2007). Severe macro and microscopic lesions in the two sheep and one goat of Outbreak 3 are consistent with changes of malacia and edema in deep structures of the encephalon described in ruminants with PEM associated to sulfur intoxication (LONERAGAN et al, 1998;CUNHA et al, 2010). Moreover, the lack of salt or mineral mixture supplementation associated with the absence of eosinophilic infiltrate in the CNS allows us to rule out the hypothesis of salt intoxication, since this lesion is considered pathognomonic of this toxicosis, especially in swine (CEBRA;CEBRA, 2004;BRUM et al, 2013).…”
Section: Discussionsupporting
confidence: 72%
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“…The consumption of sulfate-rich water by ruminants increases the risk of thiamine-responsive PEM , and sulfur intoxication (EDWARDS; GREGORY, 1991;COPPOCK;CHRISTIAN, 2007). Severe macro and microscopic lesions in the two sheep and one goat of Outbreak 3 are consistent with changes of malacia and edema in deep structures of the encephalon described in ruminants with PEM associated to sulfur intoxication (LONERAGAN et al, 1998;CUNHA et al, 2010). Moreover, the lack of salt or mineral mixture supplementation associated with the absence of eosinophilic infiltrate in the CNS allows us to rule out the hypothesis of salt intoxication, since this lesion is considered pathognomonic of this toxicosis, especially in swine (CEBRA;CEBRA, 2004;BRUM et al, 2013).…”
Section: Discussionsupporting
confidence: 72%
“…However, nowadays, not all cases of PEM are associated with thiamine deficiency, and several other etiologies are involved in the pathogenesis of this lesion (SANT'ANA et al, 2009b). Among these causes, we may highlight manifestations of excess sulfur intake (LONERAGAN et al, 1998;CUNHA et al, 2010CUNHA et al, , 2011DELFIOL et al, 2013), salt (OSWEILER et al, 1995;DUARTE et al, 2014), lead intoxication (CEBRA; CEBRA, 2004;LEMOS et al, 2004), and thiamine deficiency SANT'ANA et al, 2009b;GRAÇA et al, 2010) or analogues, such as amprolium (SANT'ANA et al, 2009a;NOGUEIRA et al, 2010), besides ingestion of plants rich in thiaminase, and acute poisoning by Phalaris spp. and by bovine herpesvirus type-5 SANT'ANA et al, 2009b).…”
Section: Polioencephalomalaciamentioning
confidence: 99%
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“…A doença em ovinos tem ocorrido em forma de surtos (Jeffrey et al 1994, Bulgin et al 1996, Low et al 1996 ou tem sido induzida experimentalmente (Gooneratne et al 1989, Rousseaux et al 1991, McAllister et al 1992, Alves de Oliveira et al 1996, Krasicka et al 1999, Salem et al, 2010. No Brasil, a PEM ocasionada pelo consumo excessivo de enxofre foi descrita em bovinos na forma de surtos (Traverso et al 2001, Cunha et al 2010) e em indução experimental (Cunha et al 2011). Existe apenas um surto de PEM em ovinos relatado no Brasil, em que os autores estimaram que os animais estivessem consumindo quantidades excessivas de enxofre na dieta (Lima et al 2005).…”
Section: Introductionunclassified
“…A técnica de determinação da concentração do sulfeto de hidrogênio ruminal (H 2 S) com utilização de tubos colorimétricos tem sido empregada com sucesso em bovinos para identificar rebanhos que estejam ingerindo alto teor de enxofre na dieta (Gould et al 1997, Cunha et al 2010, 2011. Em ovinos, a técnica foi utilizada somente por Neville et al (2010), que identificaram altos níveis de H 2 S ruminal em animais em dieta com alto teor de enxofre, apesar dos ovinos não terem desenvolvido PEM.…”
Section: Introductionunclassified