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Análise histopatológica e imunoistoquímica de encéfalo de cães com cinomose tratados com ribavirina

Authors: Sanches, Carolina Dias de Campos;

Análise histopatológica e imunoistoquímica de encéfalo de cães com cinomose tratados com ribavirina

Abstract

A cinomose é uma doença infecto-contagiosa viral, sistêmica e letal causada pelo Morbilivírus que acomete cães de todas as idades e apresenta sinais clínicos respiratórios, gastrintestinais, dermatológicos, oftálmicos e neurológicos, que podem ocorrer sequencialmente ou isoladamente. Este estudo teve como objetivo comparar lesões encefálicas utilizando a histopatologia e avaliar a quantidade de vírus pela imunoistoquímica em cães tratados com Ribavirina na dose de 30mg/Kg por via oral uma vez ao dia por 15 dias e animais não tratados com esse fármaco, e que devido a evolução desfavorável da doença foram eutanasiados. Os animais foram atendidos e tratados durante a rotina do Setor de Enfermidades Infecciosas dos Animais Domésticos- FMVZ- UNESP/ Botucatu, SP. A análise histopatológica constituiu na avaliação de córtex cerebral, cerebelo, tálamo, tronco encefálico, hipocampo e visualização de manguitos perivasculares em meninges. A partir dessas regiões foi possível identificar e classificar lesões como: desmielinização; presença de manguitos perivasculares, edema, necrose neuronal, alterações vasculares (congestão, hemorragia e trombose) e alterações inflamatórias (meningite, meningoencefalite e meningoencefalomielite). Foi observado que a desmielinização se manteve altamente presente nos dois grupos, e que quando comparados estatisticamente não existe diferença significante entre os grupos, assim como na formação de manguitos perivasculares. Houve diminuição considerável do edema em todas as estruturas avaliadas, e a ribavirina® se mostrou eficaz na redução da inflamação encefálica, assim como a necrose neuronal foi menor em quase todas as estruturas avaliadas no grupo tratado, com exceção do tálamo. A análise estatística comparativa da marcação viral entre os grupos se mostrou significante somente para o cerebelo, tálamo e tronco encefálico

Distemper is a viral infectious disease, caused by systemic and lethal morbillivirus that affects dogs of all ages and clinical signs respiratory, gastrointestinal, dermatological, ophthalmic and neurological disorders, which may occur sequentially or separately. This study aimed to compare brain lesions using histopathology and assess the amount of virus by immunohistochemistry in dogs treated with Ribavirin at a dose of 30mg/Kg orally once daily for 15 days and animals not treated with this drug, and that due to the unfavorable development of the disease were euthanized. The animals were treated and handled during routine Division of Infectious Diseases of Domestic Animals-FMVZ-UNESP / Botucatu, SP. Histopathologic analysis was to evaluate the cerebral cortex, cerebellum, thalamus, brainstem, hippocampus and viewing perivascular cuffs in the meninges. From these regions it was possible to identify and classify lesions such as demyelination, the presence of perivascular cuffing, edema, neuronal necrosis, vascular changes (congestion, hemorrhage and thrombosis) and inflammatory changes (meningitis, meningoencephalitis and meningo-encephalomyelitis). It was observed that the demyelination remained strongly present in both groups, and compared statistically no significant difference between groups, as well as the formation of perivascular cuffs. There was a considerable decrease of the edema measured in all structures, and ribavirin ® was effective in reducing brain inflammation, and neuronal necrosis was lower in almost all structures evaluated in the group treated with the exception of the thalamus. The comparative statistical analysis of the viral marking between groups was significant only for the cerebellum, thalamus and brainstem

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Pós-graduação em Medicina Veterinária - FMVZ

Country
Brazil
Keywords

Cão - Doenças, Doenças transmissiveis em animais, Imuno-histoquímica, Cinomose - Tratamento, Microbial diseases in animals, Virologia veterinaria

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green