Praxeus
From Tardis Wiki, the free Doctor Who reference
Praxeus is a virus from an unnamed planet. Originally designed to target plastic particles, it became a fatal disease that kill victims. When a humanoid was infected, their skin develop pale cracks across it, eventually overwhelming the body. In severe cases, the victim's body would disintegrate when Praxeus infected the entire body. It could be spread when contact was made with open wounds and could spread between species.