Complication of Psittacine Beak and Feather Disease and Pacheco's Disease in a Budgerigar and Experimental Reproduction of PBFD

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  • オウム嘴羽病とパチェコ氏病を併発したセキセイインコの1例及び感染実験
  • オウムシウビョウ ト パチェコ シビョウ オ ヘイハツ シタ セキセイインコ ノ 1レイ オヨビ カンセン ジッケン

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Abstract

A 1-year-old, female budgerigar showed systemic molting and severe growth retardation. Hemorrhage and infiltration of inflammatory cells, degeneration and necrosis of feather epithelial cells, and basophilic intracytoplasmic and intranuclear inclusions in feather shafts were noted. By polymerase chain reaction (PCR) analysis to detect the Psittacine beak and feather disease (PBFD) virus, positive results were yielded when the analysis targeting ORF C1 was used, but not when the traditional PCR analysis targeting ORF V1. In addition, characteristic large eosinophilic intranuclear inclusions of psittacine herpesvirus were observed in hepatocytes.The transmissibility of the variant PBFDV was recognized by experimental inoculation using an emulsion of shaft homogenates from the case bird. These results suggested that this bird developed PBFD from a variant PBFD virus as the underlying disease, and complications of Pacheco's disease made the clinical signs more severe.

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