Differences in susceptibility of biomphalaria Alexandria to schistosoma mansoni from Ejize and Dakahlia governorates, Egypt

ABSTRACT

Biomphalaria alexandrina snails were collected from irrigation canals at Giza and Daqahlia Governorates. They were exposed to strains of Schistosoma mansoni from these localities. The snails showed different rates of susceptibility to the parasite. There was a high range of snail sensitivity to S. mansoni infection [53.9% - 60.7%] when snail populations and parasite strains were from the same governorate. Snail populations and parasite strains from different governorates [Giza, Daqahlia] exhibited poor values of snail sensitivity and cercarial production with significant variations from those of the group of the same governorate