Khảo sát sự lưu hành của virus cúm gia cầm thể độc lực cao type A/H5 trên đàn gia cầm tỉnh Đồng Tháp

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Tác giả: Tuấn Kiệt Bạch, Huyền Trân Đào, Quang Hải Hứa, Hữu Trương Nguyễn, Thanh Lãm Nguyễn, Đình Phi Phượng Phan, Ngọc Tiên Tiền, Ngọc Bích Trần

Ngôn ngữ: vie

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

Mô tả vật lý: tr.30

Bộ sưu tập: Metadata

ID: 340060

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Nghiên cứu này được thực hiện nhằm khảo sát sự lưu hành của virus cúm gia cầm độc lực cao type A/H5 (H5 highly pathogenic avian influenza viruses, H5 HPAIVs) trên đàn gia cầm tại tỉnh Đồng Tháp giai đoạn 2019–2020. Nghiên cứu được tiến hành thông qua kết quả điều tra hồi cứu về tình hình chăn nuôi,số liệu giám sát cúm gia cầm trên đàn gia cầm của tỉnh Đồng Tháp trong thời gian khảo sát, những thông tin này được Chi cục Chăn nuôi, Thú y và Thủy sản tỉnh Đồng Tháp cung cấp. Kết quả nghiên cứu cho thấy tỷ lệ phát hiện H5HPAIVs ở các mẫu khảo sát (bao gồm mẫu gà, vịt và mẫu môi trường) trong năm 2020 là 13,70% (43/312), tỷ lệ này ở năm 2019 là 7,00% (18/228). Trong ba loại mẫu thu thập nói trên đều phát hiện mẫu dương tính với H5 HPAIVs, trong đó mẫu vịt có tỷ lệ phát hiện cao nhất lần lượt là 83,33% (15/18) năm 2019 và 69,77% (30/43) năm 2020. Kết quả nghiên cứu cũng cho thấy có sự đồng lưu hành của các HPAIVs thuộc subtype H5N1 vàH5Nx trên đàn gia cầm tại tỉnh Đồng Tháp và có sự thay đổi về tỷ lệ lưu hành giữa các subtype này qua các năm. Đánh giá về tương quan giữa mật độ đàn gia cầm và sự lưu hành H5 HPAIVs giữa các địa phương ở tỉnh Đồng Tháp cho thấy các địa phương có mật độ gia cầm tăng cao (trên 15–20 con/ha) như thành phố Sa Đéc và huyện Châu Thành đều có sự hiện diện của H5 HPAIVs với một tỷ lệ nhất địnhThe objective of this study aimed at investigating the prevalence of the H5 highly pathogenic avian influenza viruses (H5 HPAIVs) in poultry in Dong Thap province during the period of 2019–2020. Epidemiological data used in this study was obtained from the result of the retrospective investigation programme on livestock situation, H5 HPAI surveillance data in poultry in Dong Thap during the study period, these information were provided by Sub-Department of Animal husbandry, Animal health and Fisheries. The studied results showed that the detection rate of H5 HPAIVs in the surveyed samples (including chickens, ducks and environmental samples) in 2020 was 13.7% (43/312), this rate in 2019 was 7.00% (18/228). In addition, all three types of the collected samples were found to be positive with H5 HPAIVs in which the duck samples were detected with the highest positive sample rate with 83.33% (15/18) in 2019 and 69.77% (30/43) in 2020, respectively. The results obtained from our study also indicated that there was co-circulation of both H5N1 and H5Nx subtypes of H5 HPAIVs in poultry in Dong Thap province and circulating proportion of these subtypes varied over the years. Assessment of correlation between poultry density and prevalence of H5 HPAIVs among the areas in Dong Thap province showed that the areas having high poultry density (over 15–20 birds/ha), such as: Sa Dec city and Chau Thanh district, all had the presence of H5 HPAIVs in a certain proportion.

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