Immunolocalization of Cs CB in adult worm of C. sinensis. Rat anti-Cs CB serum was used as primary antibody and goat anti-rat IgG as the secondary antibody. Panel A and D show tissues of adult worm under fluorescence microscope. Panel A and C show the same part under white light. Panel A and B were the negative control treated with preimmune rat serum. i, intestine s, sucker. The images were magnified at 100× for photograph.