A plague in your family

(Wellcome Trust Sanger Institute) The first view of the Black Death bacterium's entire family tree shows some how family members evolve to become harmful. The researchers showed that Yersinia pestis and Yersinia enterocolitica, two major disease-causing species, independently acquired DNA that allowed them to become pathogenic.
Source: EurekAlert! - Infectious and Emerging Diseases - Category: Infectious Diseases Source Type: news