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Experimental Infection in Specific-Pathogen-Free Chicks with Avian Reovirus and Avian Nephritis Virus Isolated from Broiler Chicks Showing Runting Syndrome

J. Shirai, H. Obata, K. Nakamura, K. Furuta, H. Hihara and H. Kawamura
Avian Diseases
Vol. 34, No. 2 (Apr. - Jun., 1990), pp. 295-303
DOI: 10.2307/1591411
Stable URL: http://www.jstor.org/stable/1591411
Page Count: 9
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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.
Experimental Infection in Specific-Pathogen-Free Chicks with Avian Reovirus and Avian Nephritis Virus Isolated from Broiler Chicks Showing Runting Syndrome
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Abstract

Avian reovirus (ARV) and avian nephritis virus (ANV) were individually isolated from runty 10-day-old broiler chicks. The ARV isolate, IR-R, the ANV isolate, IR-N, and the reference strain of ANV, G-4260, were inoculated orally into 1-day-old chicks of two specific-pathogen-free (SPF) chicken lines, 151 and PDL-1. Growth retardation without the presence of gross lesions was clearly observed at 7 and 14 days postinoculation (PI) in chicks of both lines inoculated with the IR-R strain. On the other hand, in chicks inoculated with IR-N strain, growth retardation was observed only in the chicks of line 151 at 7 and 14 days PI. Microscopically, nephritis was observed in both chicken lines at 7 and 14 days PI. When chicks that were inoculated with the IR-N strain at 1 day of age were inoculated with the IR-R strain at 3 days of age, growth retardation was observed in the chicks of line PDL-1 at 10 and 17 days PI. However, the growth retardation was less severe than in the group receiving a single inoculation of the IR-R strain. /// Los virus de nefritis aviar y reovirus fueron aislados separadamente de pollitos de 10 días de edad con el síndrome de enanismo. Las cepas de reovirus aviar IR-R y de nefritis aviar IR-N, lo mismo que la cepa de referencia G-4260 del virus de nefritis aviar, fueron inoculadas oralmente en pollitos de un día de edad, pertenecientes a dos líneas genéticas de pollos libres de patógenos; 151 y PDL-1. Cuando fueron inoculados con la cepa IR-R de reovirus aviar, se observó un retardo en el crecimiento sin presencia de lesiones macroscópicas en ambas líneas de pollos entre los 7 y 14 días después de la inoculación. Cuando los pollos fueron inoculados con la cepa IR-N de nefritis aviar, el retardo en el crecimiento sólo se observó en los pollos de la línea genética 151 a los 7 a 14 días después de la inoculación. Microscópicamente se observó nefritis en ambas líneas de pollos. Cuando los pollos fueron inoculados al día de edad con la cepa IR-N de nefritis y reinoculados a los 3 días de edad con la cepa IR-R de reovirus, se observó retardo de crecimiento en los pollos de la línea PDL-1 a los 10 y 17 días después de la inoculación. Sin embargo, el retardo en crecimiento fue menos severo que en el grupo que recibió sólo la inoculación con la cepa IR-R de reovirus aviar.

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