has output colonization of host Lindsay Cowell Albert Goldfain Alexander Diehl An establishment of localization in host process in which an organism establishes itself in a host. Establishment of one organism in the extended organism of another (the host) involves at least one of (1) movement of the organism to a location within the host in which the organism can persist, or (2) adherence or attachment of the organism to part of the host. colony establishment of localization in host