Abstract
IgE responses toFasciola hepaticaextract in 6 strains of mice (C3H/HeN, CBA/JN, DBA/2N, BALB/cAnN, C57BL/6N and NZBWF1) were investigated. Serum anti-F. hepaticaIgE antibodies were determined by passive cutaneous anaphylaxis (PCA) . DBA/ 2N and BALB/cAnN mice showed higher IgE responses than other strains.