| 2 |
| 区 分 |
【短報】 |
| 著 者 |
上田 通裕1)、眞田 靖幸2) |
| 所 属 |
1）たかつき鳥の病院、2）小鳥の病院BIRD HOUSE CBL |
| タイトル |
鉄貯蔵病が疑われたアフリカオオコノハズク(Ptilopsis leucotis)の2例 |
| キーワード |
腹部膨満、腹水、飼鳥、鉄貯蔵病、アフリカオオコノハズク |
| 要 約 |
飼育下の2羽のアフリカオオコノハズク(Ptilopsis leucotis)が腹部膨満を主訴に来院した。どちらもX線検査および超音波検査で肝腹膜膣に腹水の貯留が認められ、腹水の穿刺抜去および強肝剤、利尿剤などの内服を行うが死亡した。病理解剖検査では2羽とも肝腹膜膣の腹水貯留および肝臓の結節状病変が観察された。病理組織学的検査では、肝臓では肝細胞やクッパー細胞内に多量の褐色色素が沈着し、これらはベルリンブルー染色陽性で、ヘモジデリン(血鉄素)であった。さらに肝臓の結節化した部位では、肝小葉の大小不整化、偽胆管形成や線維化などが観察され、鉄貯蔵病を疑う疾患と診断された。フクロウ科(Strigidae)の種における鉄貯蔵病の報告は著者が知る限り存在しない。本報告は、アフリカオオコノハズクが鉄貯蔵病の感受性種である可能性を示す初めての報告である。本種において腹部膨満および腹水などの症状が認められた場合には鑑別診断として鉄貯蔵病も疑う必要がある。 |
| keywords |
abdominal distension, ascites, captive birds, iron storage disease, Northern White-faced Owl |
| summary |
Tow captive Northern White-faced Owls affected with abdominal distension were carried to the hospital. In the both cases, ascites accumulated in the hepatic peritoneal cavity by radiography and ultrasonography. They died at 12days and at 75days respectively after the removal of ascites by abdominocentesis and administration of hepatoprotetive and diuretic medicines.
Macroscopically, the liver of both two birds revealed discoloration, hardening, and nodular lesions in addition of accumulation of ascites in the hepatic peritoneal cavity. Histopathologically, a large amount of brown pigments were deposited in hepatocytes and Kupffer cells in the liver of the both birds. Brown pigments were confirmed as hemosiderin because its stained with positive for Berlin blue staining. In addition, size imbalance of the hepatic lobules, formation of pseudo bile duct(pseudobiliary formation) and fibrosis were observed in the nodified parts of the liver. From the above results, two captive Northern White-faced Owls were diagnosed as a suspected iron storage disease.There is no report about iron storage disease in owls (Strigidae) as far as the aythor knows. Therefore, this is the first report that indicates that Northern White-faced Owl is also a susceptible species of iron storage disease. If symptoms such as abdominal distension and ascites are observed in this species, it is necessary to suspect iron storage disease as a differential diagnosis. |
