For scanning electron microscopy, cercariae were fixed in 2.5% glutaraldehyde phosphate buffer (0.1 mol/l, ph 7.4) at 4 C for at least 2 hours and post-fixed in 1% osmium tetroxide in the same buffer for 2 hours at 4 C.
For scanning electron microscopy, cercariae were fixed in 2.5% glutaraldehyde phosphate buffer (0.1 mol/l, ph 7.4) at4 C for at least 2 hours and post-fixed in 1% osmium tetroxide inthe same buffer for 2 hours at 4 C.