Hosts as habitats

The essential difference between the ecology of parasites and that of free-living organisms is that the habitats of parasites are themselves alive. A living habitat is capable of growth (in numbers and/or size); it is potentially reactive, i.e. it can respond actively to the presence of a parasite by changing its nature, developing immune reactions to the parasite, digesting it, isolating or imprisoning it; it is able to evolve; and in the case of many animal parasites, it is mobile and has patterns of movement that dramatically affect dispersal (transmission) from one habitable host to another.

Worm Farming

Worm Farming

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