Hello! (1) ingredients: common nutrient agar or Colombian agar, defibrinated sheep blood (2) preparation method: take the required amount of common nutrient agar or Colombian agar, add distilled water to dissolve, and autoclave. Cooling to 50℃, adding a certain amount of sheep blood, and pouring into a flat plate. Different from the chocolate plate, it must be cooled before adding sheep blood, otherwise the red blood cells will be destroyed.