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Abstract
This study was carried out to investigate the effect of lead pollution on
the prevalence of encysted metacercariae in musculature and organs of
wild alive Oreochromas nilotica (600) fish collected from Ismailia canal
at EI- Tal E1-Kabeir and Nefisha and from El-Dobaeia tributary (200 /
locality and 56/ season ). The results showing that the prevalence at EI-
Tal EI-kabeir was lower than that at Nefisha and El-Dobaeia tributary.
There was a positive correlation between the prevalence of encysted
metacercariae and lead levels in both water and musculature. Three types
of encysted metacercariae were recognized , Hetrophyidae (three
localities). Diplostomatidae and Prohemistomatidae (Nefisha and EJ-
Dobaeia tributary).