Ultrastructure examination was applied to study the effect of short' (4 days) and long (10 days) exposures to sublethal concentration (1 ppm ) of ethanol extract of Solarium elaeagnifolium seeds (S. etaeag. ) (Family: Solanecae) on the digestive gland and hermaphrodite gland of infected and uninfected the pulmonate snail Biomphalaria alexandrina.
Ultrastructural studies of the above two glands of infected snails illustrated remarkable cytologicai changes due to the infection with marked increase in the cytoplasmic vacuolation that almost occupied the whole cell of the digestive gland,
The ultrastructural changes in the digestive and hermaphrodite gland cells due to exposure of snails to ethanol extract of the candidate plant showed degeneration in the nucleus, nucleolus and mitochondria with abnormal Golgi complex as well as in glycogen digestion.