José T. Saavedra

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Enterococci are commensals of the gas-trointestinal tracts (GITs) of animals, from simple invertebrates to humans, and likely evolved early in a primitive GIT-type environment [1–3]. This presumption is supported by their ubiquity and their streamlined genomes (an indicator of host adaptation, which results in a number of nutritional needs that must be(More)
Questions surrounding the chronology, place, and character of the initial human colonization of the Americas are a long-standing focus of debate. Interdisciplinary debate continues over the timing of entry, the rapidity and direction of dispersion, the variety of human responses to diverse habitats, the criteria for evaluating the validity of early sites,(More)
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