Cytolysin that shows hemolytic activity (on bovine erythrocytes, HC(50)=5.75 mg/ml). This hemolytic activity is completely inhibited by small unilamelar vesicles composed of PC/PG, PC/PI and PC/PS in 1:1 molar ratios (with at least 100 mg/ml concentration). Localized within the skin and proboscis and are most readily isolated from body mucus secretions. Belongs to the worm cytolysin family.