Health officials in Lake County are warning people to take precautions against Lyme disease as warmer weather arrives.
The county's Health Department reports the number of cases in Lake County, which is adjacent to Wisconsin, almost tripled last year to 46 from 17 in 2012.
Mike Adam is a senior biologist with the department. He says his agency is already receiving reports of ticks this spring.
Deer ticks can carry Lyme disease.
The bacterial illness can affect the heart, joints and nervous system if untreated.
The department advises undermining tick habitats by keeping grass cut short and clearing leaf litter. People in wooded or grassy areas are also advised to wear long-sleeved shirts and long pants and to apply insect repellant.