NGHIÊN CỨU TÌNH HÌNH BỆNH VIÊM DA NỔI CỤC TRÊN ĐÀN TRÂU, BÒ TẠI MỘT SỐ TỈNH THUỘC KHU VỰC BẮC TRUNG BỘ

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Tác giả: Đình Huệ Lê, Hoàn Lê, Xuân Hòa Nguyễn, Thị Hải Lê Võ

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học kỹ thuật Thú y, 2023

Mô tả vật lý: tr.5

Bộ sưu tập: Metadata

ID: 337484

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A total of 1,166 samples were collected from buffaloes and cows with lumpy skin disease (LSD) clinical symptoms and epidemiology in the areas of the provinces from Thanh Hoa to Quang Tri during the period from December 2020 to April 2021 for testing, detecting the presence of LSD virus by realtime-PCR technique. The studied results showed that there were 1,048 samples positive with LSD virus (Capripoxvirus), accounting for 89.88%. There was a significant difference (p<
0.05) on the positive sample rate among the sample types, in which the positive skin scale sample rate with LSD virus were the highest (96.86%), higher than the positive blood sample rate (86.69%) and mixed sample rate (83.73%).The surveyed result on the situation of LSD in the provinces from Thanh Hoa to Quang Tri showed that the disease has appeared in Quang Tri province since December 2020. From December 12, 2020 to April 30, 2021, the epidemic has spread to 71 districts, towns and cities, with 897 communes and wards of these provinces. The number of died and destroyed animals were 3,934 from a total of 35,064 animals, accounting for 11.22%. The result of clinical epidemiological study also showed that in the study areas there were 170 buffaloes infected with LSD, accounting for 0.48% of the total number of the infected buffaloes and cows, there were 34,889 cows infected with LSD, accounting for 99.50%. The rate of buffaloes and cows infected with LSD was 2.19% of the herd total. The rate of died and destroyed animals was 2.2% of the herd total in the localities suffering with the LSD epidemic, the weight of destroyed animals was 528,409 kg. The study also showed that 644,667 buffaloes and cows were vaccinated, reaching 40.37%Tổng số 1.166 mẫu bệnh phẩm đã được thu thập từ trâu, bò có triệu chứng lâm sàng và dịch tễ củabệnh viêm da nổi cục (Lympy skin disease - LSD) tại các vùng có dịch bệnh này ở các tỉnh từ ThanhHóa đến Quảng Trị trong khoảng thời gian từ tháng 12/2020 – 30/4/2021 để xét nghiệm, phát hiện virus gây LSD bằng kỹ thuật realtime-PCR. Kết quả nghiên cứu cho thấy có 1.048 mẫu dương tínhvới virus gây bệnh LSD (Capripoxvirus), chiếm tỷ lệ 89,88%
với sự sai khác có ý nghĩa về tỷ lệ mẫubệnh phẩm dương tính với virus LSD giữa các tỉnh thuộc vùng nghiên cứu (p=0,000015). Nghiêncứu còn chỉ ra rằng có sự sai khác có ý nghĩa (p<
0,05) về tỷ lệ dương tính giữa các loại mẫu bệnhphẩm, trong đó tỷ lệ mẫu vảy trên da dương tính với virus LSD là cao nhất (96,86%), cao hơn tỷ lệmẫu dương tính của mẫu máu (86,69%) và mẫu gộp (83,73%).Kết quả điều tra về tình hình mắc LSD tại các tỉnh từ Thanh Hóa đến Quảng Trị cho biết dịchbệnh đã xuất hiện tại tỉnh Quảng Trị từ tháng 12/2020. Từ ngày 12/12/2020 đến ngày 30/4/2021, dịch bệnh đã lan rộng đến 71 huyện, thị, thành phố, với 897 xã, phường của các tỉnh này
số lượng trâu bò chết và tiêu hủy là 3.934 trên tổng số 35.064 con mắc bệnh (chiếm tỷ lệ 11,22%). Nghiên cứu dịch tễ học lâm sàng cho biết tại vùng nghiên cứu có 170 con trâu mắc bệnh (chiếm 0,48%) và 34.889 con bò mắc bệnh (chiếm tỷ lệ 99,50% so với tổng số trâu, bò mắc bệnh). Tỷ lệ trâu, bò mắc bệnh là 2,19% so với tổng đàn. Tỷ lệ chết và tiêu hủy là 2,2% so với tổng đàn trâu, bò tại địa phương có dịch
khối lượng trâu, bò tiêu hủy lên tới 528.409 kg. Nghiên cứu cũng cho biết có 644.667 con trâu, bò được tiêm phòng vacxin viêm da nổi cục
đạttỷ lệ 40,37%.

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