| the peopling of the pacific from a bacterial perspective. | two prehistoric migrations peopled the pacific. one reached new guinea and australia, and a second, more recent, migration extended through melanesia and from there to the polynesian islands. these migrations were accompanied by two distinct populations of the specific human pathogen helicobacter pylori, called hpsahul and hspmaori, respectively. hpsahul split from asian populations of h. pylori 31,000 to 37,000 years ago, in concordance with archaeological history. the hpsahul populations in ne ... | 2009 | 19164753 |