Selected enzymatic activities in fresh water snails, specific intermediate host for human schistosomiasis

The activities of aspartate aminotransferase (AST) (EC.2.6.1.1.) I, alanine aminotransferase (ALT) (EC.2.6.1.2) II and lactate dehydrogenase (LD) (EC.1.1.1.27) III have been measured in tissue homogenate and in haemolymph of Biomphalaria alexandrina snails, the specific intermediate host for the human parasitic disease schistosomiasis due to Schistosoma mansoni.