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PARASITISM, THE DIVERSITY OF LIFE, AND PALEOPARASITOLOGY
Paleoparasitologia
Parasitismo
Doenças infecciosas
DNA antigo
Origem do Parasitismo
Paleoparasitology
Parasitism
Infectious diseases
Ancient DNA
Origin of Parasitism
Affilliation
Fundação Oswaldo Cruz. Escola Nacional de Saúde Pública Sergio Arouca. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Protozoologia. Rio de Janeiro, RJ, Brasil.
Université de Reims. Laboratoire de Paléoparasitologie, CNRS ESA 8045. Reims, France.
University of Nebraska-Lincoln. School of Natural Resource Sciences. Lincoln, USA.
Fundação Oswaldo Cruz. Escola Nacional de Saúde Pública Sergio Arouca. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Protozoologia. Rio de Janeiro, RJ, Brasil.
Université de Reims. Laboratoire de Paléoparasitologie, CNRS ESA 8045. Reims, France.
University of Nebraska-Lincoln. School of Natural Resource Sciences. Lincoln, USA.
Fundação Oswaldo Cruz. Escola Nacional de Saúde Pública Sergio Arouca. Rio de Janeiro, RJ, Brasil.
Abstract
The parasite-host-environment system is dynamic, with several points of equilibrium. This makes it difficult to trace the thresholds between benefit and damage, and therefore, the definitions of commensalism, mutualism, and symbiosis become worthless. Therefore, the same concept of parasitism may encompass commensalism, mutualism, and symbiosis. Parasitism is essential for life. Life emerged as a consequence of parasitism at the molecular level, and intracellular parasitism created evolutive events that allowed species to diversify. An ecological and evolutive approach to the study of parasitism is presented here. Studies of the origin and evolution of parasitism have new perspectives with the development of molecular paleoparasitology, by which ancient parasite and host genomes can be recovered from disappeared populations. Molecular paleoparasitology points to host-parasite co-evolutive mechanisms of evolution traceable through genome retrospective studies.
Keywords in Portuguese
EvoluçãoPaleoparasitologia
Parasitismo
Doenças infecciosas
DNA antigo
Origem do Parasitismo
Keywords
EvolutionPaleoparasitology
Parasitism
Infectious diseases
Ancient DNA
Origin of Parasitism
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