The formation of a symbiont structure that serves to infect its host organism. It includes physiological, developmental, and morphological changes of the symbiont. The host is defined as the larger of the organisms involved in a symbiotic interaction.
Comment:
Note that this term should not be used to annotate gene products of the host. It should only be used to annotate those gene products of the symbiont involved in this process.
Synonyms:
exact_synonym:
formation of host infection structure
related_synonym:
formation by symbiont of infection structure on or near host; formation of host penetration structure; formation of infection structure on or near host