The hepatopancreatic- gonadal complex of the snail was
found fully loaded with various stages of digenetic trematode
pathogens, such as sporocyst, cercaria and rediae. Attention has
been paid on the rediae and cercarial development within. Fully
developed rediae were found in the peripheral region of the
hepatopancreatic tubules. The cercarial development commences
with proliferation of germ ball from granular cell called ‘propagative
cell’ of the muscular process of rediae present in the posterior region.
The proliferated germ balls lie freely in the cavity of redia and
apparently did not retain any connection with the muscular wall of the
redia. The germ ball is granular rounded cell measuring 1-2Hm
diameter. With the result of mitotic division thereby gets converted
into multicellular rounded structure, from which develop further
cercaria. These progressive germ balls measure 5-8 Hm found freely
within matrix of redia.
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