Sero-prevalence and Pathological Examination of Lymphoid Leukosis Virus Subgroup A in Chickens in Anhui Province, China
Sero-prevalence and Pathological Examination of Lymphoid Leukosis Virus Subgroup A in Chickens in Anhui Province, China
Hui Zhang2, Yajing Wang2, Kun Li2, Mujeeb Ur Rehman2, Fazul Nabi2, Rui Gui2, Yanfang Lan2 and Houqiang Luo1,2*
ABSTRACT
The avian lymphoid leukosis is caused by various avian retroviruses which induce a variety of benign and malignant neoplasm in domestic chickens with subsequent economic losses to poultry industry. Effected birds show lymphocyte tumor, abnormal proliferation and series of tumors in connective tissues and other visceral organs. To evaluate the status of lymphoid leukosis virussubgroup A (ALV-A) infection in free-range chickens in five different cities of Anhui province, a total of 732 serum samples were analyzed through enzyme-linked immuno sorbent assay (ELISA) in 2015 and 2016. The diagnosis of avian leukosis virus subgroup A (ALV-A) infection was confirmed by necropsy, histopathological examinations and PCR analysis. The results showed, 20 chickens as positive for ALV-A (2.73%, 95% CI 1.7-4.2) and these chickens were found to be positive for ALV-A with the further distribution of 2.91% (95% CI 1.0-6.7), 3.70% (95% CI 1.5-7.5), 2.48% (95% CI 0.5-7.1), 3.13% (95% CI 0.6-8.9) and 1.30% (95% CI 0.2-4.6) in Anhui province of Huaibei, Suzhou, Bozhou, Bengbu and Fuyang, respectively. The present survey showed that free-ranging chickens of Anhui province have been exposed to lymphoid leukosis virus subgroup A, indicating a high risk factor for poultry industry.
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June 2017
Vol. 49, Iss. 3, Pages 761-1149
