Pulmonary dystrophic oxalosis and its possible relation to fibrosis in an aged Gentoo penguin (Pygoscelis papua).
A 20-year-old Gentoo penguin was found dead with a clinical history of inappetence and dyspnoea. At necropsy, the lungs showed severe congestion/hemorrhage and atelectasis. Histopathologically, fibrosis was observed exclusively around parabronchi with severe collagen deposition. In fibrotic lesions, there were numerous depositions of crystalline structures accompanied by epithelioid cells and multinucleated giant cells (foreign body type). In addition to irregularly lamellar structures as the morphology, the crystals were demonstrated calcium oxalate (CaOx) by the Alizarin red S staining with and without polarized light and von Kossa's staining. Myocobacteria and fungi were not found by special and immuohistochemical stainings. Pulmonary dystrophic oxalosis is a very rare lesion in Gentoo penguin.
Laboratory of Veterinary Pathology, Division of Veterinary Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-58 Rinku-ourai-kita, Izumisano city, Osaka 598-8531, Japan.
Kavindra Kumara
KK
Wijesundera
Takeshi
T
Izawa
Miyuu
M
Tanaka
Tatsuko
T
Nakao
Yuko
Y
Maezono
Shu
S
Ito
Mitsuru
M
Kuwamura
Jyoji
J
Yamate
D000375:Aging; D000818:Animals; D000836:Animals, Zoo; D001715:Bird Diseases / Q000473:pathology*; D002129:Calcium Oxalate / Q000378:metabolism*; D017809:Fatal Outcome; D008297:Male; D011658:Pulmonary Fibrosis / Q000473:pathology / Q000662:veterinary*; D046429:Spheniscidae
D002129:Calcium Oxalate