Lesões orofaríngeas e neurológicas em ovinos associadas ao uso de pistolas dosificadoras
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Data
2007-07
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Resumo
Six outbreaks of oropharyngeal lesions caused by drenching guns in sheep are reported. In
2 outbreaks in Rio Grande do Sul the morbidity was 6.25% and 15%, and the lesions observed
after antihelmintic treatment in adult sheep were characterized by a fistula extending from
mouth to skin of the face. All sheep died or were euthanatized after continuous weight loss
for up to 8 months. Another outbreak in the same State affected 26 out of 360 adult sheep
after being dosed with molasses, causing lesions in the oral mucosa followed by malignant
edema of the oral and subcutaneous tissues. All sheep died within 10 days after treatment.
Another case observed in Rio Grande do Sul affected one out of 88 adult ewes. The animal
died with hemorrhages from the nose and mouth 8 days after antihelmintic treatment. At
necropsy an ulcerated lesion covered by a clot of fibrine was found in the oral mucosa. The
lesion had a fistulated tract with purulent exudate extending through the soft tissues in direction
to the right eye. Two outbreaks occurred in the State of Goiás 16-20 days after antihelmintic
treatment in 5-9 months old lambs. Morbidity was 11.43% and 15.62% and fatality rate was
7.14% and 9.38%. Main clinical signs were nervous signs caused by abscesses with a diameter of
0.5-3cm, containing purulent exudates in the oropharynx, soft palate and adjacent muscles
extending to the meninges through the atlantoaxial joint. Not-purulent meningitis was observed
histologically. The need to use proper drenching guns and pay attention during dosing
to avoid lesions of the oropharynx is pointed out.
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Palavras-chave
Abscessos orofaríngeos, Alterações neurológicas, Tratamento oral com anti-helmínticos, Ovinos, Oropharyngeal abscess, Neurologic alterations, Drenching guns, Sheep
Citação
SANT'ANA, Fabiano J. F. de; GARCIA, Edismair C.; RABELO, Rogério E.; COSTA, Yara L. da; SCHILD, Ana L.; RIET-CORREA, Franklin. Lesões orofaríngeas e neurológicas em ovinos associadas ao uso de pistolas dosificadoras. Pesquisa Veterinária Brasileira, Rio de Janeiro, v. 27, n. 7, p. 282-286, jul. 2007.