Abstract
Overall 10389 snails were collected from four study areas of Punjab from November 2005 to October 2006. The highest prevalence (38%) was found for Indoplanorbis followed by Physa (17%), Bellamaya (10.3%), Gyraulus (10%), Lymnaea (9.2%), Oncomelania (9%) and the lowest was found for Bulinus (6.7%). Only Indoplanorbis snails were found to be positive for Schistosoma bovis cercaria. Correlation between snails' infection and meteorological factors like relative humidity (%) and rainfall (mm) were significant (P<0.05) while this correlation was not significant for temperature (degrees C) and pan evaporation (mm).