Black Loss of life scientists crack germ’s genetic code Using DNA extracted from centuries-aged skeletons, scientists have cracked the genetic code of the bacterium that caused the Dark Death, among history’s most severe plagues. They discovered that the germ, Yersinia pestis, is nearly similar to germs that remain today natural mechanism erection read more . There are just a few dozen adjustments among the a lot more than 4 million blocks of DNA, according to a report published on the web Wednesday in the journal Character.