Praxeus

From Tardis Wiki, the free Doctor Who reference

Praxeus was a virus originally designed to target plastic particles. However, 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 into a cloud of dust when Praxeus infected the entire body. It could be spread when contact was made with open wounds and between species. (TV: Praxeus)