Make sure that you clean your sheds , crawlspaces , and garbage cans often . Close up any small holes and cracks they can come in through . Watch for plague activity in rodent populations where plague is known to occur ' Eliminate sources of food and nesting places for rodents around homes , work places , and recreation areas . Make your home and outbuildings rodent-proof . If you anticipate being exposed to rodent fleas , apply insect repellents to clothing and skin , according to label instructions , to prevent...