河北省坝上高原地区绵羊消化道线虫优势虫种季节动态研究

SEASONAL-DYNAMIC STUDY OF PREDOMINANT WIREWORM OF DIGESTIVE CANAL OF SHEEP IN BASHANG ALTIPLANO AREA, HEBEI PROVINCE

河北省坝上高原地区完全放牧条件下的绵羊消化道线虫优势虫种 (捻转血矛线虫、羊仰口线虫和食道口线虫 )季节动态 :幼虫的感染强度在温暖的 4～ 9月最低 ,而寒冷的 10～ 3月较高 ;成虫的感染强度在 6～ 9(或 8)月最低。血矛线虫 4～ 6月和 9月～次年 1月感染强度较高 ,羊仰口线虫除 6～ 8月外其余各月份感染强度较高。食道口线虫 4～

Seasonal dynamic of predominant wireworm of digestive canal of sheep in Bashang altiplano area, Hebei province were observed. The result shows that infection intensity of larva was lowest in 4～9 month and higher in 10～3 month. Infection intensity of imago was lower in 6～9 month. Infection intensity of Haemonchus contortus was higher in 4～6 month and 9～1 month. Infection intensity of Bunostomum trigonocephalum was higher in a year except 6~8 month. Infection intensity of Oesophagostomum was higher in 4~6 month.