Six proteins had been reported previously to react with antibodies from patients' sera: EmII/3 [7] , EM13 [6] , P-29 [31] , GRP [32] , EG19 [33] , AgB8/1 and AgB8/2 [1] . These earlier findings supported the inclusion of these antigens in our analysis. In total, 45 peptide sequences from 11 proteins were chosen to be chemically synthesized and spotted onto microarray. 31 peptides derived from E. multilocularis and 14 from E. granulosus (table S1).