Sự lưu hành của virus gây bệnh marek trên gà bản địa ở tỉnh đồng tháp

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Tác giả: Thị Việt Thu Hồ, Ngọc Trang Huỳnh, Tâm Đồng Nguyễn, Ngọc Minh Thư Vũ

Ngôn ngữ: vie

Ký hiệu phân loại: 641.665 Food and drink

Thông tin xuất bản: Khoa học kỹ thuật chăn nuôi, 2021

Mô tả vật lý: 70-75

Bộ sưu tập: Metadata

ID: 494421

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Bệnh Marek là bệnh truyền nhiễm gây tổn thất lớn trong chăn nuôi gà. Bệnh gây ra bởi Gallid herpesvirus. Trong tự nhiên, bệnh chủ yếu được truyền lây qua đường hô hấp, gà cảm nhiễm có thể mắc bệnh do hít phải virus gây bệnh trong tế bào nang lông hoặc mãnh biểu mô da của gà nhiễm virus. Với mục đích khảo sát sự lưu hành của virus gây bệnh (MDV-Marek's disease virus) trên giống gà thả vườn, nghiên cứu này được thực hiện qua việc phát hiện gen Meq của MDV từ 132 mẫu nang lông của 132 đàn gà thu thập từ 105 hộ chăn nuôi tại 5 huyện Hồng Ngự, Cao Lãnh, Lấp Vò, Lai Vung, Châu Thành của tỉnh Đồng Tháp. Kỹ thuật realtime-PCR được thực hiện để phát hiện gen Meq đặc hiệu của 3 serotype (1, 2 và 3) của Gallid herpesvirus. Kết quả nghiên cứu cho thấy đã phát hiện 36/132 đàn có nhiễm MDV serotype 1 với tỷ lệ 27,27%, huyện có tỷ lệ đàn gà nhiễm cao nhất là Lấp Vò 64% (16/25), kế đến là Châu Thành 32,14% (9/28), Lai Vung 23,53% (8/34), Cao Lãnh 11,11% (3/27) và 0,0% (0/18) ở huyện Hồng Ngự, chưa phát hiện được MDV serotype 2 và 3 (HVT-Herpes virus of turkey).Marek disease is an infectious disease caused by Gallid herpesvirus. In nature, the disease is mainly transmitted by the airborne route, sensitive chickens can be sick by inhaling infectious virions in the skin particles and feather debris of carrier chickens. With the aim to survey the prevalence of MDV (Marek disease virus) in backyard chickens, this study was carried out by detecting Meq gene from 132 samples of chicken feather follicles collected from 132 chicken flocks of 105 households in 5 districts including Hong Ngu, Cao Lanh, Lap Vo, Lai Vung, Chau Thanh of Dong Thap province. Realtime PCR was used to detect specific Meq gene of 3 serotypes (1, 2 and 3) of Gallid herpesvirus. The results showed that 36 out of 132 flocks were infected by MDV serotype 1 comprising 27,27%
the highest prevalence was reported in Lap Vo 64.0% (16/25), followed by Chau Thanh 32.14% (9/28), Lai Vung 23.53% (8/34), Cao Lanh 11.11% (3/27), and none infected flock was reported in Hong Ngu district (0/18), MDV serotype 2 and serotype 3 (HVT-Herpes virus of turkey) was not detected.

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