Typically in Minnesota HA case totals are ranging from 400-700 or more yearly. Both diseases, like Lyme disease, begin with flu-like symptoms.Ĭases: Infection with HA occurs at a lower rate than Lyme disease in Minnesota each year and it is the second most common Minnesota tick-borne illness.
HA had been detected in small mammals in MMCD’s collaborative research beginning in 1995.īabesiosis is a rare disease that is caused by protozoa, not bacteria. People are exposed to HA most frequently in central Minnesota, but a few exposures have been documented in the Twin Cities area since 2000. Human Anaplasmosis (HA) is a bacterial disease that is potentially fatal, though the vast majority of people who receive treatment (antibiotics) recover. Both areas were intensely surveyed by MMCD, but no additional ticks were found. In each case the tick was found on a dog. This means greater potential for you to come into contact with deer ticks.ĭeer ticks are rarely found in the core cities of the metro area, but in the fall of 2008 MMCD received two independent credible reports of deer ticks being found along the Mississippi River in the cities of Minneapolis and Saint Paul. The numbers of deer ticks collected and our total number of positive collection sites in our Lyme tick distribution study have been higher than average since 2000, suggesting an upward trend in the local deer tick population. Minnesota trends higher than the national average -, according to MDH "in 2017, Minnesota had a rate of 25.2 cases per 100,000 people compared to the national rate of 9.1 cases per 100,000 people." District Deer Tick Surveillance Their all-time high statewide tabulation occurred in 2013 with 1,431 Lyme cases. Since 2000 the Minnesota Department of Health (MDH) has been consistently tabulating record-setting human tick-borne disease case totals. Lyme disease is the most commonly diagnosed tick-borne illness in Minnesota each year. Although less likely to be infected, the immature deer tick nymph transmits Lyme disease more often than adult ticks because their small size keeps them undetected. Sometimes the males do briefly attach to their host, but their attachment time is too short for disease transmission to occur. Male deer ticks do not transmit disease because they generally don’t feed. Infected deer tick females can transmit disease as they feed. Adult deer ticks do not have white markings and are out in both spring and fall.
Adult wood ticks have white markings and are mainly out in the spring. Isolated populations have also been found in Hennepin, Dakota, Scott, and Carver Counties.īoth wood ticks and deer ticks can be found in the spring and early summer, but wood ticks are generally not disease transmitters in Minnesota. The deer tick occurs in northern and eastern Anoka County, northern Ramsey County, and most of Washington County. The Metropolitan Mosquito Control District’s Lyme Disease Program identifies and monitors the distribution of deer ticks within the seven-county Twin Cities metropolitan area. A Lyme infection can most notably affect the joints, nervous system, and heart. Lyme disease is a bacterial infection transmitted to humans by deer ticks ( Ixodes scapularis– official common name is the black legged tick).
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