MỘT SỐ ĐẶC ĐIỂM DỊCH TỄ BỆNH GIUN LƯƠN Ở LỢN TẠI TỈNH BẮC GIANG

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Thông tin xuất bản: Tạp chí Khoa học kỹ thuật Thú y, 2019

Mô tả vật lý: tr.64

Bộ sưu tập: Báo, Tạp chí

ID: 312574

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Kết quả mổ khám đường tiêu hóa của 1325 con lợn nuôi tại 5 huyện của tỉnh Bắc Giang (Việt Yên, Hiệp Hòa, Lạng Giang, Yên Dũng, Sơn Động) cho thấy tỷ lệ lợn bị nhiễm giun lươn Strongyloides ransomi trung bình là 36,98%, cường độ nhiễm là 4 - 1026 giun/lợn. Xét nghiệm phân của 4920 lợn bằng phương pháp phù nổi Fülleborn và xác định cường độ nhiễm bằng số lượng trứng giun lươn trên buồng đếm Mc Master cho thấy có 2005 lợn bị nhiễm giun lươn Strongyloides ransomi, chiếm 40,75%
tỷ lệ lợn bị nhiễm giun lươn ở các mức độ nhẹ là 47,58% và trung bình là 28,28%. Tỷ lệ lợn bị nhiễm với cường độ nhiễm nặng và rất nặng là thấp hơn. Lợn dưới 2 tháng tuổi bị nhiễm giun lươn với tỷ lệ cao và cường độ nặng. Mùa hè và mùa thu, lợn nhiễm giun lươn cao hơn rõ rệt so với mùa đông. Lợn nuôi theo phương thức chăn nuôi truyền thống có tỷ lệ nhiễm giun lươn là cao nhất (61,55%) và tỷ lệ này thấp nhất ở lợn nuôi theo phương thức công nghiệp (19,83%).Trứng và ấu trùng giun lươn Strongyloides ransomi phát tán ở cả khu vực nền chuồng, hố nước thải chuồng nuôi, vườn, bãi trồng cây thức ăn cho lợn. Tuy nhiên, mức độ ô nhiễm trứng và ấu trùng giun lươn ở nền chuồng cao hơn rõ rệt so với những khu vực lấy mẫu khác.The result of comprehensive examination for the gastrointestinal tract of 1325 pigs in 5 districts of Bac Giang province (Viet Yen, Hiep Hoa, Lang Giang, Yen Dung, Son Dong) showed that the mean infection rate of pig with Strongyloides ransomi was 36.98%, the mean infection intensity was from 4 to 1026 worms per pig. At the same time, fecal samples of 4920 pigs were tested for worm by Fülleborn method and the infection intensity was determined by Mc Master counting chamber. As a result, there were 2005 pigs infected with Strongyloides ransomi, the infection rate was 40.75%, the infection rate with mild and moderate level was 47.58% and 28.28%. The infection rate with heavy and very heavy level was lower. The pigs under 2 months old were infected with the high rate and severity intensity. The infection rate of pigs with Strongyloides ransomi in the summer and autumn was significantly higher than in the winter. The pigs were raised by traditional methods infected with Strongyloides ransomi with the highest rate (61.55%). In contrast, the lowest infection rate of pigs was raised by industrial methods (19.83%).Strongyloides ransomi’s eggs and larvae distributed in the barn background, sewage pits and gardens. However, the swine barn background was contaminated with the worm eggs and larvae, which was significantly higher than the other places.

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