For parasites and bacteria that lie within the body, consider doing a salt water colon cleanse or enema. Fill a hot water bottle with warm water and then apply a few tbsp. of sea salt or pure salt.
Place the strap in the anus and gently squeeze the hot water bottle so that it flushes the anus area clean. You would want to stand in a bath tub or shower while doing this so that the excess water has somewhere to go.
You can also drink salt water to kill internal parasites and bacteria. Simply fill an 8 oz. glass with warm water and add 1 or 2 tsp. of sea salt or pure salt. Stir until salt blends with water. But be sure to drink more than 8 glasses of regular water if you want to the treat the bacteria and parasites using this method.