We live in nice highrise along the harbor. Not uncommon to hear of rat sightings. What is our risk if in contact with one?

35 Diseases. Worldwide, rats and mice spread over 35 diseases. These diseases can be spread to humans directly, through handling of rodents, through contact with rodent feces, urine, or saliva, or through rodent bites. Diseases carried by rodents can also be spread to humans indirectly, through ticks, mites or fleas that have fed on an infected rodent. See http://www.Cdc.Gov/rodents/.