The ED50 of the H. contortus from Australian BZ-R strain to Albendazole as determined by EHA was 0.54ug/ml, while that of XJ was 0.0023ug/ml.

• 对这两个虫株用虫卵孵化试验(Egg hatch assay)进行生物学检测表明；澳大利亚虫株丙硫苯咪唑ED50达0.；54ug/ml；为抗药性虫株; 新疆石河子株为0