Discussion
In the present study, SEM examination of Fasciolaeggs after in vitro treatment with different concentra-tions of NaOCl showed that the naturally smooth surfaceof the egg was interrupted by areas that appeared tobe devoid of material, with distorted eggshell materialin the form of breaches, cleft and invaginations and acarpet of blebs of various sizes covering the surface.Highly damaged eggs, with shrinkage, fragmentation,breaches and invaginations, were observed. All thesechanges increased gradually with increasing concentra-tion of NaOCl and length of exposure.