Fig 7
The whole-body sections of C. sinensis metacercariae embedded in paraffin were reacted with mouse antibodies specific to the recombinant forms of C. sinensis CsMb1 and CsMb3. Pooled serum from pre-immune mice (n = 3) was used in the control reaction. The positive reactions were developed into a blue color using a blue chromogen substrate for horseradish peroxidase-conjugated to a second antibody. The red arrows mark a follicle-like structure exhibiting a strong positive signal against the anti-CsMb3 antibody in the subtegumental region. EB, excretory bladder; In, intestine; OS, oral sucker; Tg, tegument; VS, ventral sucker. Original magnifications, x 1,000.