The term 'host' can be divided into several subcategories:
1. Definitive host: the host in which a pathogen passes its adult and sexual stages
2. Intermediate host: the host in which a pathogen passes its larval and nonsexual stages
3. Reservoir host: an animal that is infected by a pathogen, and serves as a source of infection for another species. (Associated terms: reservoir of infection)
4. Paratenic host: similar to an intermediate host, only that it is not needed for the pathogens' development cycle to progress
5. Dead-end host: an intermediate host that does not allow transmission to the definite host, thereby preventing the pathogen from completing its development.