This Week in PNAS

A study in the early, online edition of the Proceedings of the National Academy of Sciences suggests relationships forged through co-evolution between Helicobacter pylori bugs and their human hosts can significantly influence gastric disease risk. Researchers from the US and Colombia assessed genotyping patterns in pathogen and host blood samples taken from almost 250 individuals in two parts of Colombia with disparate gastric cancer rates but comparable H.

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Two researchers have found that behavioral genetic defenses in criminal cases don't tend to affect outcomes, according to Popular Science.

Researchers report that while host genetics influence the oral microbiome, they don't appear to affect cavity-causing microbes, the Economist says.

Pandas' gut microbiomes change as what they eat changes with the seasons, writes Discover's Inkfish blog.

In PLOS this week: comparative genomic study of malaria-linked macaque parasite, search for apple root reference genes, and more.