Simultaneous endemic infections with subgroup J avian leukosis virus and reticuloendotheliosis virus in commercial and local breeds of chickens

Avian Pathology : Journal of the W.V.P.A
Zhi-zhong CuiShanshan Meng

Abstract

Epidemiological studies of subgroup J avian leukosis virus (ALV-J) and reticuloendotheliosis virus (REV) infections were conducted during 1999 to 2009 on 29 chicken flocks of various commercial and local breeds located in six provinces in China. Samples were typically from chickens with myelocytomas or proventricular lesions. ALV-J was isolated from 25 flocks including seven out of seven flocks containing "yellow chickens" or other local breeds and several flocks of layer chickens. REV was isolated from 19 flocks. Co-infection of ALV-J and REV was confirmed in 11/38 birds of 8/15 flocks with myelocytomatosis and in 11/24 birds of 3/5 flocks with proventricular lesions. Both ALV-J and REV were vertically transmitted in four breeder flocks of local chicken breeds. One experiment in specific pathogen free chickens indicated that co-infection at hatch strongly depressed antibody responses to ALV-J but not to REV. The results suggest that infections with both ALV-J and REV have become endemic in local breeds, including breeder flocks where both viruses appear to be perpetuated by vertical transmission. In addition, both viruses were present in at least some commercial broiler, layer and breeder flocks. Eradication programmes are nee...Continue Reading

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Citations

Dec 31, 2015·Emerging Microbes & Infections·Xuan DongZhizhong Cui
Nov 17, 2009·Journal of Ethnopharmacology·Feng-Xiang LiuZhi-Zhong Cui
Jun 29, 2016·Infection, Genetics and Evolution : Journal of Molecular Epidemiology and Evolutionary Genetics in Infectious Diseases·Di LiuWeisheng Cao
Nov 1, 2017·The Veterinary Record·Lorraine P SmithDavid Welchman
Feb 11, 2020·Tropical Animal Health and Production·Shima H AlfakiAbdel Rahim M El Hussein
Jul 28, 2019·Veterinary Medicine and Science·Shima H AlfakiAbdel Rahim M El Hussein

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Methods Mentioned

BETA
fluorescence microscopy
enzyme-linked immunosorbent assay
dot blot

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