Tình trạng bảo hộ đối với bệnh Newcastle sau tiêm phòng tại các trang trại chăn nuôi gà công nghiệp ở Tỉnh Đồng Nai

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Tác giả: Tiến Tài Đinh, Thị Thương Nguyễn, Chí Thông Phan

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học kỹ thuật Thú y, 2020

Mô tả vật lý: tr.52

Bộ sưu tập: Báo, Tạp chí

ID: 331168

Thêm vào giỏ Liên kết toàn văn

Nghiên cứu được thực hiện với mục tiêu khảo sát tình hình chăn nuôi gà công nghiệp tại các trangtrại trên địa bàn tỉnh Đồng Nai, đánh giá hiệu quả bảo hộ sau tiêm phòng đối với bệnh Newcastle vàxem xét các yếu tố tiềm năng ảnh hưởng đến khả năng bảo hộ của vacxin Newcastle tại các trang trạichăn nuôi gà công nghiệp. Trong năm 2015-2016, nghiên cứu đã thu thập tổng số 10.463 mẫu huyếtthanh từ 283 trang trại gà được tiêm phòng vacxin Newscatle sau 21 ngày ở 10 huyện của tỉnh ĐồngNai. Trong đó có 133 trang trại gà nuôi thịt, 111 trang trại gà đẻ trứng thương phẩm và 39 trang trạigà giống bố mẹ. Mẫu huyết thanh được xét nghiệm tìm kháng thể kháng virus Newcastle sau tiêmphòng bằng phản ứng HA và HI. Trong 283 trang trại được khảo sát
có 56,5% trang trại ở quy mô lớn(>
20.000 con)
37,1% ở quy mô vừa (5.000-20.000 con) và quy mô nhỏ <
5.000 con chỉ chiếm 6,4%.Tỷ lệ trang trại đạt bảo hộ (mức bảo hộ ≥ 80% đàn) cao nhất là trang trại có quy mô vừa. Gà đẻ trứngthương phẩm và gà giống bố mẹ có tỷ lệ bảo hộ trên 95%, và kết quả cũng cho thấy thời điểm tiêmphòng không ảnh hưởng đến tỷ lệ bảo hộ. Mô hình hồi quy logistic cho thấy vùng chăn nuôi theo vị tríđịa lý và hướng sản xuất có ảnh hưởng đến khả năng bảo hộ đối với bệnh Newcastle sau tiêm phòng ởcác trang trại chăn nuôi gà công nghiệpThe study aimed at investigating the situation of the industrial chicken farms in Dong Nai province, evaluating the efficiency of Newcastle vaccine, and determining the potential factors affecting the protective ability of Newcastle vaccine in the farms. In 2015-2016, a total of 10,463 blood samples were collected from 283 chicken farms, 21 days after Newcastle vaccination in 10 districts of the province. In the surveyed farms, there were 133 farms for meat production, 111 farms for egg production and 39 farms for chicken breeds. The serum samples were tested for Newcastle antibody after vaccination by using HA and HI. In 283 surveyed farms, the proportions of large farms (>
20,000 chickens), medium farms (5,000-20,000 chickens) and small farms (<
5,000 chickens) accounted for 56.5%, 37.1% and 6.4%, respectively. The highest proportion of getting protection (protective level ≥ 80% per herd) was observed in medium farms. Chickens farms for egg production and chicken breeds showed more than 95% protective rate after vaccination and the period of vaccination in the year might not influence the protective rate of Newcastle vaccine. The logistic model showed that the geographical location of industrial chicken farms and production type could affect the protective rate of Newcastle vaccine.

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