This study was performed to evaluate the antibacterial properties of different (wet and dry ethanolic and aqueous) extracts of Siphonaria carbo on Escherichia coli, Staphylococcus aureus, and Saprolegnia parasitica using well method as well as antioxidant activity using MDA method. The
results revealed that ethanolic extracts from dry tissue showed minimum lipid peroxidation 30.54±0.49 (±SD), and thus the highest autoxidation (44.45±0.74) activity. The results of antibacterial analysis of the examined extracts showed no significant antibacterial property (P<0.05). This study revealed some antioxidant activities of Siphonaria carbo extracts. Detailed biochemical studies are recommended for identification of compounds causing this property.