Figure 2: Electrophoresis of amplification products from genomic DNA of various parasite developmental stages. PCR products of adult S. mansoni worms, schistosomula, cercariae (lanes 4, 5 & 6), infected B. alexandrina snail tissues (lanes 7 & 8) as well as hemolymph (lanes 9 & 10) were subjected for electrophoresis on 1.5% agarose gel containing ethidium bromide parallel to 100 bp DNA ladder (lane 1) and products from a negative control of PCR reaction (lanes 2 & 3) where no DNA was added in the master mix were included on the same gel. Specific amplification products at 338 bp were visualized in all developmental stages that were not evidenced in the negative control lanes.