Human enteropathogen Clostridium difficile is actively undergoing speciation
In Nature Genetics it has been reported that a new Clostridium difficile species, selected for metabolizing simple dietary sugars and producing high levels of resistant spores is emerging with a special capacity for healthcare-mediated transmission.
The work reveals that this new species is primed for human transmission in the modern healthcare systems.
The authors conclude:
In summary, our study elucidates how bacterial speciation may prime lineages to emerge and transmit through a process that is accelerated by the modern human diet, the acquisition of antibiotic resistance or healthcare regimes.