Systemic amyloid A (AA) amyloidosis in the Bengalese finch (<i>Lonchura striata var. domestica</i>)

Abstract

The incidence of systemic amyloid A (AA) amyloidosis was high in Bengalese finches ( Lonchura striata var. domestica ), as 150 of 235 birds from 5 breeding colonies (63.8%) tested positive for it. The incidence was statistically significantly higher in one colony. The liver was the most frequently affected organ (150 cases), followed by the spleen and then the kidneys. The degree of amyloid deposition was high in the liver and spleen and low in the kidneys. The histological distribution of amyloid deposits was similar in all finch species. Species-specific or colony-specific predisposing factors for systemic AA amyloidosis in Bengalese finches remain to be elucidated. As far as we know, this is the first report of amyloidosis in Bengalese finches.

A reactive systemic amyloidosis with fibrosis in a Vigova duck : A case report

“…Liver abnormalities, both gross and microscopic, were consistent with prior reports of severe hepatic amyloidosis in ducks 8,9 . Systemic amyloid deposition in liver and other organs such as ovary, kidney, spleen, pancreas and adrenals were reported in Japanese quail and Bengalese fi nch 10,11 . Avian amyloidosis is systemic type in nature and its development is associated with predisposing conditions such as age, breed, neoplastic conditions, stress conditions, chronic infl ammation and infections 8 .…”

“…Avian amyloidosis is systemic type in nature and its development is associated with predisposing conditions such as age, breed, neoplastic conditions, stress conditions, chronic infl ammation and infections 8 . A study on management of bumblefoot in duck demonstrated that Staphylococcus is one of the infectious agents in the digital pad leading to chronic infl ammation of the foot 11 . Since amyloid has an affi nity to collagen 12 , it is essential to assess the quantity of amyloid bound with collagen fi bers to fi nd the severity of damage caused by amyloid deposition in the connective tissue stroma of various organs.…”