ELK GROVE - Prevention is a key component in a happy, healthy pet’s life. Intestinal parasites live everywhere and can cause not only harm to your beloved pets, but also to you and your family as well. The transmission of intestinal parasites from animals to humans is called parasitic zoonosis. This happens when a person accidentally ingests parasite eggs or an infected flea. Ingested roundworm larvae travel through the liver, lungs and other organs. In some cases, roundworms can cause visceral larva migrans. This is where the larvae cause damage to tissue and affect nerves or lodge themselves in the eye causing permanent nerve or eye damage, sometimes even blindness! Hookworm larvae can penetrate skin, and cause cutaneous (skin) larva migrans as they move within the skin causing an inflammation. One specific type of hookworms can penetrate into deeper tissues and cause serious damage to the intestines or other organs.