Comparative studies on the pathogenicity of cytopathic avian enteroviruses (avian nephritis virus) isolated from broiler chicks

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Abstract
The pathogenicities of three cytopathic avian enteroviruses, strains AAF7, M‐8, and G‐4260 which were classified as avian nephritis viruses, were compared following inoculation into chicken kidney cell (CKC) cultures, embryonating eggs, and 1‐day‐old chicks. Strain M‐8 produced the largest plaques, highest yields in CKC cultures, highest pathogenicity for embryonating eggs, and severest lesions in the kidney of experimentally‐infected chicks. In contrast, strain AAF7 was the least pathogenic. All strains caused growth retardation and nephritis in experimentally‐infected chicks.