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Isolation of Avian Influenza Virus (H10N7) from an Emu (Dromaius novaehollandiae) with Conjunctivitis and Respiratory Disease

P. R. Woolcock, H. L. Shivaprasad and Morella De Rosa
Avian Diseases
Vol. 44, No. 3 (Jul. - Sep., 2000), pp. 737-744
DOI: 10.2307/1593122
Stable URL: http://www.jstor.org/stable/1593122
Page Count: 8
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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.
Isolation of Avian Influenza Virus (H10N7) from an Emu (Dromaius novaehollandiae) with Conjunctivitis and Respiratory Disease
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Abstract

Avian influenza virus was isolated from the conjunctiva of a male emu chick. Clinical observations included ocular discharge, dyspnea, and mild respiratory signs. Lesions included conjunctivitis, tracheitis, bronchopneumonia, and airsacculitis. Escherichia coli was isolated from the conjunctiva and the sinus, and Staphylococcus sp. was isolated from the conjunctiva. Influenza A viral nucleoprotein was detected immunohistochemically in epithelial cells of the bronchi, lung parenchyma and tracheal mucosa, and mononuclear inflammatory cells within the exudate of the bronchial lumen; conjunctiva, air sacs, kidney, intestine, and liver were negative for the viral nucleoprotein. The isolated influenza virus was typed as H10N7 and was determined to be nonpathogenic for chickens. /// Se aisló el virus de influenza aviar de la conjuntiva de un emú (Dromaius novaehollandiae) macho joven. Los signos clínicos incluyeron excesivo lagtimeo, disnea y signos respiratorios leves. Las lesiones consistieron en conjuntivitis, traqueítis, bronconeumonía e inflamación de los sacos aéreos. Se aisló Escherichia coli de la conjuntiva y de los senos y Staphylococcus sp de la conjuntiva. Por medio de una reacción inmunohistoquímica se detectó la nucleoproteína del virus de influenza A en las células epiteliales de los bronquios, el parénquima del pulmón y mucosa de la tráquea y en las células inflamatoria mononucleares del exudado en el lumen bronquial. La conjuntiva, los sacos aéreos, el riñoń, el intestino y el hígado fueron negativos a la nucleoproteína viral. El virus de influenza aislado fue caracterizado como H10N7 y se determinó como no patógeno en pollos.

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