What is the most positive proof of a rodent infestation?

• A. Sighting a live rodent.
• B. Rodent damage to foods.
• C. Rodent feces on the floor.
• D. Rodent rub marks on a wall.

Answer: (A)

Direct observation of a live rodent provides the strongest, most definite proof of an active infestation. When you actually see the animal, you have real-time confirmation that rodents are present and likely moving through the space, which triggers immediate and appropriate control actions.

Other signs—like damage to foods, droppings, or rub marks—signal that rodents have been or are in the area, but they’re indirect. They can result from past activity, from a small number of rodents, or even from other factors, and they don’t prove that an infestation is currently active in the moment. So while these signs raise concern and guide investigation and sanitation, they don’t offer the same level of certainty as a live sighting.