Absolutely. Smaller rodents such as squirrels, rats, mice, and chipmunks can carry a variety of diseases such as hantavirus, tularemia, and salmonella. Ways these diseases can be transmitted include a bite or scratch, contacting droppings or urine, or even eating food a rodent has contaminated. Because of these health risks and the damage they can do to your property, rodent infestations should never be taken lightly and should be treated as soon as possible by an experienced rodent exterminator.