Rats and Mice have been responsible for or implicated in the spread of various diseases to people and domestic animals   for years. Today however, because ofimprovements in sanitation, effective drugs, and rodent and insect control programs,  the disease threat from rodents is not as significant as it once was. But because of the habits of rodents traveling i n sewers,   garbage, etc., there are still cases of human and animal diseases being transmitted and there is also the constant potential of disease outbreaks in cities where rats and mice live in close proximity to people. However small the threat may be, it is a potential   that always must be kept in mind.