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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 98, No. s1, 2003, pp. 1-2
Bioline Code: oc03001
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 98, No. s1, 2003, pp. 1-2

 en Foreword
C Combes

Abstract

Living organisms appeared nearly 4 billion years ago, probably in aquatic environments of our developing planet. Much time later on they were capable of adapting to terrestrial environments and this adventure continued till the appearance of human conscience. But it is infinitely probable that, since the beginning, living organisms had conquered a third type of environment: the living environment itself. Thus parasitism had appeared... It was an unfailing success throughout evolution up to the present day, for a host offers a habitat, a permanent source of food, and an efficient mechanism of dispersion to every organism which knows how to exploit it.

 
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