Schistosomiasis has acute and
phases. Days after the the
cercarial dermatitisappears at site
where the worm the skin. In
one two months the acute
begins and fever, cough, pain
and nausea occur soon disappear; in
some this phase may not
. Inthe chronic phase of
disease the worm infestation affect
the bowels, causing , bloody
feces, tiredness and
(enlargement of
the liver spleen). The excessive
pressure the hepatic portal vein
varix (collateral circulation) in
esophagus and the patient
have hemorrhages and bloody
that may even cause .