Diseases that can be Transmitted by Ticks

Most tick bites do not result in disease, but it is a good idea to recognize and watch for the early symptoms of some of the more commonly encountered tick-transmitted diseases.

Tick-borne diseases of concern in Minnesota include:

  • Lyme Disease
    Lyme disease is a potentially serious bacterial infection affecting both humans and animals. The incidence of Lyme disease in Minnesota has been increasing in recent years.

  • Human Anaplasmosis (HA)
    Human anaplasmosis, formerly known as human granulocytic ehrlichiosis (HGE) is a bacterial disease that was first recognized in Minnesota in the early 1990s. It is transmitted to people by deer ticks, the same ticks that transmit Lyme disease. HA is less common than Lyme disease, however.

  • Babesiosis
    Babesiosis is a protozoan infection that occurs infrequently in Minnesota. Approximately 20% of patients diagnosed with Babesiosis also have Lyme disease from the same deer tick bite.

  • Rocky Mountain Spotted Fever (RMSF)
    Rocky Mountain spotted fever is extremely rare in Minnesota, but isolated cases have been reported from the southern section of the state.

  • Ehrlichiosis
    CDC; Ehrlichiosis caused by Ehrlichia chaffeensis is found throughout much of southeastern and southcentral United States and is not a common disease in Minnesota at this time, although a small number of cases have been reported. Ehrlichiosis due to the Ehrlichia murin-like agent was first reported in 2009. Since then, low numbers of cases have been reported in Minnesota and Wisconsin. Attention: Non-MDH link

  • Powassan (POW) Virus
    Powassan (POW) virus is a tick-transmitted flavivirus.

  • Southern Tick-Associated Rash Illness (STARI)
    CDC; While STARI is not a known public health concern in Minnesota at this time, people who travel to the south-central United States may be at risk for the disease. Attention: Non-MDH link

  • Tularemia
    Tularemia is a potentially serious illness that occurs naturally in the United States. It is caused by the bacterium Francisella tularensis found in animals (especially rodents, rabbits, and hares).

Updated Monday, 24-Jun-2013 10:23:30 CDT