Some definitions

Chapter 27.0 Internal Parasite Appendix A Detailed Approach to Treatment & Control of Internal Parasites 27.1 Some definitions Definitive host  The organism in which an adult parasite lives and reproduces is called the definitive host.

Intermediate Host  The organism in which immature parasites develop is called an intermediate host. Except for tapeworms, the parasite does not usually cause serious illness in the intermediate host.

Larvae  Immature forms of various parasites are also called larvae. Larvae often cause damage to internal organs if they travel through the body.