All rodents can spread disease to both man and livestock. The majority of rodents carry a bacterium, which causes leptospirosis (this is commonly known as weils disease), which is an increasingly common and dangerous disease.
They also carry a number of parasites, such as the fleas, which in turn carries plague, a disease still found in over 40 countries today.
Rats have a large social stigma, as they are a major pest in almost every country in the world. A rat can cause serious structural damage (e.g. chewing through wires and bases of doors etc) and spread disease. In the UK there is said to be more rats than the population of people, which proves the theory that you are never more than 70 feet away from a rat.
House Mice are found at anytime of year indoors, but they are more common in the winter when they are trying to find shelter from the cold. They can contaminate food stuffs and also cause damage by chewing almost anything, and because of their size and agility can easily find their way into buildings and live with them.
Also found outside in gardens as a a result of bird feed dropping on the floor or trying to get into compost heaps, these are treated with poison placed in external rat boxes that are key operated so to keep them away from any non target species. ( Only rats and mice will fit in the boxes with the poison inside)
We usually use poison to eradicate these pests, as you can see what they are eating and are more likely to remove more than with traps. We can use traps, sticky boards or humane traps if required, but these only kill a smaller amount at a time and need to be checked more frequently.
We use key operated mouse boxes for kitchens and children and tamper proof.