Fowlpox is one of the oldest diseases reported in birds. The causative genus Avipoxvirus affects ~232 domestic and wild species. We present herein the history, clinical findings, and macroscopic and histologic lesions caused by a clade C poxvirus in an exotic psittacine breeding colony in southern Brazil. Clinical signs included yellow nodular lesions at the commissure of the beak and on the periocular skin, loss of appetite, and death. Fifty birds were autopsied, and fragments of periocular skin, tongue, and trachea were examined histologically, which revealed hyperkeratosis associated with eosinophilic intracytoplasmic inclusion bodies. Tracheal fragments and periocular skin were subjected to nested PCR and phylogenetic analyses. The sequenced strain showed 99.58% identity with the nucleotide sequences of Avipoxvirus strains AY53011, KC018069, AM050383, and AM05382 isolated from birds in Germany, United States, and United Kingdom. The strain was grouped under clade C, which represents isolates exclusively from the Psittacidae family. The infection caused by clade C Avipoxvirus in the exotic psittacines examined ( Platycercus sp. and Psephotus haematonotus) demonstrates the circulation of this clade in this breeding colony.
Resumo. O desvio portossistêmico ou shunt portossistêmico é uma afecção comumente vista em cães. Essa doença se trata de uma anomalia vascular que faz comunicação entre a circulação sistêmica e a circulação portal. Devido à essa comunicação vascular anômala, o sangue portal proveniente da drenagem de órgãos como estômago, intestino, pâncreas e baço, passa diretamente para a circulação sistêmica, desviando do fígado que é responsável pela desintoxicação de diversas substâncias. Por conseguinte, o paciente irá manifestar inúmeros sinais clínicos com possível envolvimento neurológico ou somente sistêmico em decorrência do acúmulo das toxinas no sangue. O tratamento de eleição para o shunt portossistemico é a ligadura do vaso anômalo, à qual o anel constritor ameroide será o mais abordado nesse artigo.
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