Paleoparasites of man
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Abstract
The parasite – host – environment system is dinamic with several points of equilibrium. This makes it difficult to trace the traceholds between benefit and damage, and therefore, the definitions of commensalism, mutualism and symbiosis become worthless. The same concept of parasitism may encompass commensalism, mutualism and symbiosis. Life emerged as a consequence of parasitism at the molecular level, an intracellular parasitism created evolutive events that allowed species to diversify. Studies of the origin and evolution of parasitism have new perspectives with the development of molecular paleoparasitology that points to host-parasite coevolutive mechanisms through genome retrospective studies. An ecological and evolutive approach to the study of parasitism is presented here.
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