A Deadly Rat Droppings Virus Can Survive In Dust For Several Weeks bejo 6909 Share A Deadly Rat Droppings Virus Can Survive In Dust For Several Weeks Rat Droppings in Attic Insulation - Critter Control Canada How Long Can Rat Droppings Remain Infectious? Read also: Enicospilus Wasp Sting: How To Treat The Skin Reaction Fast