"living host" is a correct and usable phrase in written English.
It is typically used when referring to a living being or organism that provides a home or shelter for another organism, though it can be used in other contexts as well. For example, "The plant had to be moved or it would not get enough sunlight to be a suitable living host for the insects living in its branches."
Upon hatching, the larva eats the still living host.
Pathogenesis is the stage of disease in which the pathogen is in intimate association with living host tissue.
F. oxysporum thrives at soil temperatures above 24 °C (75 °F) and can live indefinitely in soil without access to living host plants.
Saprogenesis is the part of the pathogen's life cycle when it is not in vital association with living host tissue and either continues to grow in dead host tissue or becomes dormant.
Powdery mildew fungi represent a paradigm for obligate biotrophic parasites, which only propagate in long-lasting intimate interactions with living host cells.
The resulting transformants are functional for studying dynamic bacterial processes in living host cells.
These modified bacteria can then be screened under chosen conditions, for instance by inoculating them into a susceptible living host model such as mice or insects.
ETI, currently exclusively found in resistance against biotrophic pathogens that derive nutrients from living host tissues, is generally race-specific and results in HR at the infection site.
The Jewish host prefers seeing the gentile host destroyed instead of leaving peaceably from a still-living host.
In summary, we have shown the impact of sex-specific differences in shoaling behaviour on parasite transmission within a group-living host species.
However, although most laboratory studies indicate that the metabolic rate of the host increases with parasite infestation, this has never been shown in free-living host populations.
