![]() ![]() About 70 to 80 percent of people with Lyme disease develop an erythema migrans (EM) rash made of spots that are red welts, sometimes with purple or blistered areas in the center.Some people may not develop any symptoms of illness.It is a potentially serious bacterial infection caused by Borrelia burgdorferi, and can infect humans and animals. Lyme disease is the most common of all the tick diseases. ![]() This helps the state monitor where ticks are active.Ĭheck this map to see where blacklegged ticks have been found in the state. If you want to find out for sure what type of tick you've found, you can fill out a form and send it and the tick to the health department for proper identification. Even when biting, a blacklegged tick must stay attached for at least 24 to 48 hours to transmit Lyme disease (12 to 24 hours to transmit human anaplasmosis). They can't do so by just crawling on a person. Risk of bites from these ticks in Minnesota is highest during the spring, early summer, and fall months. Tickborne diseases have been increasing each year in the state.Ī blacklegged tick can only transmit disease to humans through a bite. Greatest risk is found within hardwood or mixed hardwood forests, which provide suitable habitat for blacklegged ticks. High risk areas for tick exposure in Minnesota include the north central, east-central and southeastern regions of the state, also extending into some northwestern counties. See the Minnesota Department of Health page on tickborne diseases. The blacklegged tick carries Lyme disease and several other diseases. The American dog tick in Minnesota can carry Rocky Mountain spotted fever, though this is rare. For more information on Rocky Mountain spotted fever, see information at the Centers for Disease Control and Prevention (CDC). Females die after laying eggs in late spring, completing the life cycle.įemale (right) and male blacklegged ticks.They feed on white-tailed deer, dogs, horses, raccoons or humans.Adults take blood meals in the fall or the following spring.They typically turn into adults in late summer.The following year, nymphs take blood meals in spring or early summer, feeding on small mammals, birds or humans.They usually spend the winter as nymphs.They feed throughout the summer on white-footed mice or other small mammals or ground-foraging birds.They require at least two years to complete their life cycle.Adults are active outdoors even at temperatures as low as the mid to upper 30s o F, but tend to be most active in warmer temperatures.īlacklegged ticks are important because they are a potential carrier of Lyme disease and other diseases. Adults are common April through June but die after laying eggs, thus completing the life cycle.īlacklegged ticks are common from spring through fall.The adults do not feed until the following spring, when the weather turns warm.After feeding a second time, these immature ticks develop into adults during late summer of the second year.After their blood meal, they change into nymphs.These larvae do not feed until late spring or early summer the following year.During the summer of the first year, the eggs hatch into larvae.Usually take two years to complete their life cycle.They feed on a wide variety of mammals, including white-footed mice, voles, chipmunks, raccoons, squirrels, dogs, cats and people. American dog ticks are most commonly found in spring in open fields and in the underbrush of hardwood forests.
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