New genes out of nothing

One key question in evolutionary biology is how novel genes arise and develop. Swedish researchers now show how new genes and functions that are advantageous to bacteria can be selected from random DNA sequences. The results ...

Analysis reveals key gene for bacterial infection

To successfully infect their hosts, bacteria need to evade the host immune system in order to reproduce and spread. Over the course of evolution, hosts—such as humans—develop increasingly sophisticated defenses against ...

Sewage reveals levels of antimicrobial resistance worldwide

A comprehensive analysis of sewage collected in 74 cities in 60 countries has yielded the first comparable global data showing the levels and types of antimicrobial resistant bacteria present in healthy people. The National ...

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