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Much effort has been made to control schistosomiasis infection in Egypt. However, enduring effects from such strategies have not yet been achieved. In this study, we sought to determine the genetic variability related to the interaction between  Biomphalaria alexandrina  snails and  Schistosoma mansoni . Using RAPD-PCR with eight (10 mers) random primers, we were able to determine the polymorphic markers that differed between snails susceptible and resistant to  Schistosoma mansoni  infection using five primers out of the eight. Our results suggest that the RAPD-PCR technique is an efficient means by which to compare genomes and to detect genetic variations between schistosomiasis intermediate hosts. The RAPD technique with the above-noted primers can identify genomic markers that are specifically related to the  Biomphalaria alexandrina/Schistosoma mansoni  relationship in the absence of specific nucleotide sequence information. This approach could be used in epidemiologic surveys to investigate genetic diversity among  Biomphalaria alexandrina  snails. The ability to determine resistant markers in  Biomphalaria alexandrina  snails could potentially lead to further studies that use refractory snails as agents to control the spread of schistosomiasis.

Genetic Variation betweenBiomphalaria alexandrinaSnails Susceptible and Resistant toSchistosoma mansoniInfection