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

2009 ◽  
Vol 38 (6) ◽  
pp. 443-448 ◽  
Author(s):  
Zhizhong Cui ◽  
Shuhong Sun ◽  
Zhi Zhang ◽  
Shanshan Meng
Keyword(s):  
Avian Leukosis Virus ◽  
Reticuloendotheliosis Virus ◽  
Subgroup J ◽  
Endemic Infections

scholarly journals Histologic findings and viral antigen distribution in natural coinfection of layer hens with subgroup J avian leukosis virus, Marek’s disease virus, and reticuloendotheliosis virus

2019 ◽  
Vol 31 (5) ◽  
pp. 761-765 ◽  
Author(s):  
Hongmei Liu ◽  
Kui Ma ◽  
Miaomiao Liu ◽  
Chengcheng Yang ◽  
Xueting Huang ◽  
...  
Keyword(s):  
Disease Virus ◽  
Viral Antigen ◽  
Avian Leukosis Virus ◽  
Marek's Disease Virus ◽  
Marek's Disease ◽  
Marek’S Disease Virus ◽  
Reticuloendotheliosis Virus ◽  
Layer Hens ◽  
Neoplastic Lymphocytes ◽  
Subgroup J

We investigated the histologic findings and viral antigen distribution in 3 cases of natural coinfection of layer hens with subgroup J avian leukosis virus (ALV-J), Marek’s disease virus (MDV), and reticuloendotheliosis virus (REV) in hens. At autopsy, diseased hens were found to have hepatosplenomegaly and thickened proventriculi, with white tumor nodules in the liver, spleen, lung, kidney, and ovary. Microscopically, most tissues had been infiltrated by neoplastic lymphocytes; the spleen, lung, proventriculus, heart, and liver had been infiltrated by both neoplastic lymphocytes and myeloblastic cells and/or primitive reticular cells. Fluorescence multiplex immunohistochemistry staining revealed ALV-J, MDV, and REV antigens co-expressed in the same tissue, even the same cell.

Enzootic outbreak and spontaneous regression of keratoacanthomas in a commercial layer flock

2013 ◽  
Vol 61 (3) ◽  
pp. 366-375 ◽  
Author(s):  
Ivan Dinev
Keyword(s):  
Stratum Corneum ◽  
Spontaneous Regression ◽  
Unusual Case ◽  
Infectious Agent ◽  
Avian Leukosis Virus ◽  
Daily Basis ◽  
Pcr Analysis ◽  
Reticuloendotheliosis Virus ◽  
First Report ◽  
Production Period

This paper reports an enzootic outbreak and spontaneous regression of keratoacanthomas among adult layer hens with lesions on the skin of the legs. The observations were performed in a flock of 55,000 commercial layers (50,000 Lohmann White and 5,000 Lohmann Brown). At the age of 30 weeks, Lohmann White layers exhibited a number of growths (at an average of 60 hens per week, representing 0.1% of the flock) in the region of leg toes on a daily basis over 28 weeks that regressed during the remaining flock production period. Gross and histological investigations identified the lesions as keratoacanthomas. PCR analysis was negative for avian leukosis virus (ALV) and reticuloendotheliosis virus (REV). The present investigations have revealed an unusual case: this is the first report on an enzootic outbreak of multiple keratoacanthomas in commercial layers. The results of the aetiological investigations do not show a relation to any infectious agent or a chemical-toxic cause. The abnormal invasion of keratinocytes from the stratum corneum leading to neoplasms in this case coincides with the phase of peak laying capacity which is in fact a stress factor and might be regarded as a provocative moment.

scholarly journals Characterization of subgroup J avian Leukosis virus isolated from Chinese indigenous chickens

2018 ◽  
Vol 15 (1) ◽  
Author(s):  
Fanfeng Meng ◽  
Qiuchen Li ◽  
Yawen Zhang ◽  
Zhihui Zhang ◽  
Sibao Tian ◽  
...  
Keyword(s):  
Avian Leukosis Virus ◽  
Indigenous Chickens ◽  
Subgroup J
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