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Systemic Amyloidosis in Laying Japanese Quail

Kikuyasu Nakamura, Hirokazu Tanaka, Yoshimasa Kodama, Masanori Kubo and Tomoyuki Shibahara
Avian Diseases
Vol. 42, No. 1 (Jan. - Mar., 1998), pp. 209-214
DOI: 10.2307/1592599
Stable URL: http://www.jstor.org/stable/1592599
Page Count: 6
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Systemic Amyloidosis in Laying Japanese Quail
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Abstract

Systemic amyloidosis was seen in laying Japanese quail in a flock of a farm rearing 95,000 birds. The clinical signs included decreased egg production, anorexia, white diarrhea, and subcutaneous abscesses of the head. Histologically, amyloid deposited predominantly in the spleen and liver. In addition, there were lesser degrees of amyloidosis in other organs (pancreas, kidney, heart, lung, gastrointestinal tract). Amyloid stained positively with Congo red and thioflavin T. Immunohistochemically, amyloid substance stained positively against amyloid A protein, but not with amyloid protein derived from light chains of immunoglobulins, transthyretin of familiar amyloid polyneuropathy, amyloid protein of dermal amyloidosis, nor amyloid P component. Ultrastructurally, amyloid substance consisted of many nonbranching amyloid fibrils about 10 nm in diameter. /// Se observó amiloidosis sistémica en una parvada de codornices japonesas de postura en una granja de 95000 aves. Los signos clínicos incluyeron disminución en la producción de huevo, anorexia, diarrea blanca y abcesos subcutáneos en la cabeza. Histológicamente se observaron depósitos amiloides en el bazo y en el hígado. Además, se observó amiloidosis en menor grado en otros órganos (páncreas, riñón, corazón, pulmón y tracto gastrointestinal). Los amiloides fueron positivos a la tinción con rojo congo y teoflavina T. Inmunohistoquímicamente la sustancia amiloidea fue positiva a la tinción con la proteína amiloidea A pero no con la proteína amiloidea derivada de las cadenas livianas de inmunoglobulinas, con la transtiretina de la polineuropatía amiloidea familiar, con la proteína amiloidea derivada de la amiloidosis dermal o con el componente amiloideo P. Ultraestructuralmente la sustancia amiloidea consistió de varias fibrillas amiloideas no ramificadas de más o menos 10 nm de diámetro.

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