摘要： A simple and sensitive immunoenzymatic assay—ABC(Avidin-biotin-HRB Complex)-ELISAfor detection of anti-hydatid specific IgE antibodies is presented.Sera from 40 patients with hydatiddisease detected by both ABC-ELISA and conventional ELISA have shown that the former was moresensitive than the latter,particularly in cases with lower levels.The positive percentages were 92.5％and 82.5％in serum dilution of 1:100;75％ and 57.5％ in 1:200 dilution,respectively.The