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Gizzard Nematodiasis in Japanese Mountain Hawk Eagle (Spizaetus nipalensis)

Kikuyasu Nakamura, Takayuki Ohyama, Asuka Saito, Manabu Yamada, Tadao Imada and Masaji Mase
Avian Diseases
Vol. 45, No. 3 (Jul. - Sep., 2001), pp. 751-754
DOI: 10.2307/1592923
Stable URL: http://www.jstor.org/stable/1592923
Page Count: 4
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Gizzard Nematodiasis in Japanese Mountain Hawk Eagle (Spizaetus nipalensis)
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Abstract

In this paper, we report spontaneous gizzard nematodiasis in an adult Japanese mountain hawk eagle (Spizaetus nipalensis). Grossly, the gizzard had a black mucoid substance attached to the surface mucous membrane, and the heart was dilated. Histologically, immature larvae with yellow pigments invaded crypts of the mucous membrane. More developed larvae invaded the lamina propria and muscular layers and serosa of the gizzard, with pressure atrophy and cellular reaction (infiltration of heterophils and macrophages and proliferation of fibrous connective tissue). Moderate bronchopneumonia due to larvae invasion was also seen in the lung. The morphology suggests that the parasites may be nematodes, but the species of nematode could not be confirmed. The bird may have died from malabsorption and respiratory damage as a result of the gizzard and lung lesions. /// Se reporta un caso de nematodiasis en la molleja de un águila halcón japonés de las montañas (Spizaetus nipalensis). Macroscópicamente, la molleja presentó una substancia negra mucoide adherida a la membrana mucosa y el corazón estaba dilatado. Histológicamente, larvas inmaduras con pigmento amarillo invadieron las criptas de la membrana mucosa. Larvas mas desarrolladas invadieron la lámina propia, capa muscular y serosa de la molleja, produciendo atrofia por presión y reacción celular (infiltración de heterófilos y macrófagos y proliferación de tejido conectivo fibroso). También se observó en el pulmón una bronconeumonía moderada debida a la invasión de larvas. La morfología de los parásitos sugiere que se trataba de nemátodos pero no se pudo confirmar la especie. El ave pudo haber muerto a causa de mala absorción y daño respiratorio como resultado de las lesiones en molleja y pulmón.

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