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Health Information Center

Ehrlichiosis

Authors:
  • Pamela Jones, MA
Publication Type:

Condition

Ehrlichiosis

Definition

Ehrlichiosis is an infection passed through a tick bite. It can be deadly unless medicine is taken to treat it.

Causes

Ehrlichiosis is caused by specific bacteria. The bacteria are passed through the bite of a tick. The lonestar tick, deer tick, and dog tick are linked with this infection.

Risk Factors

Things that may raise the risk of ehrlichiosis are:

  • Being in areas known to have ticks
  • Spending time in the Mid-Atlantic, Southeastern, and Southcentral United States
  • Having a weakened immune system

Symptoms

It may take 1 to 2 weeks for symptoms to happen. The first symptoms are like the flu:

  • Fever
  • Chills
  • Muscle and joint aches
  • Headaches

Some people may also have a rash. Rarely, people may have problems breathing or heart symptoms.

Treating the infection right away improves outcomes, regardless of symptoms.

Headache and Neck Stiffness.

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Diagnosis

The doctor will ask about symptoms and past health. The person will be asked if they have spent time in areas known for ticks. A physical exam will be done.

A blood test may be done to check for signs of ehrlichiosis.

Treatment

Ehrlichiosis is treated with antibiotics.

Prevention

To lower the risk of this infection:

  • Avoid tick-infested areas.
  • Wear light-colored clothing—to help see a crawling tick.
  • Tuck pants into socks—when in tick-infested areas.
  • Regularly check for and remove ticks from the body—when in tick-infested areas.
  • Remove ticks using fine-tipped tweezers. Grasp the tick close to the skin’s surface. Pull upward steadily.
  • Clean tick bites with soap and water.
  • Use tick repellents.
RESOURCES:
  • Centers for Disease Control and Prevention

    http://www.cdc.gov

  • Family Doctor—American Academy of Family Physicians

    http://familydoctor.org

CANADIAN RESOURCES:

  • Health Canada

    https://www.canada.ca

  • Public Health Agency of Canada

    http://www.phac-aspc.gc.ca

  • Centers for Disease Control and Prevention

    http://www.cdc.gov

  • Family Doctor—American Academy of Family Physicians

    http://familydoctor.org

CANADIAN RESOURCES:

  • Health Canada

    https://www.canada.ca

  • Public Health Agency of Canada

    http://www.phac-aspc.gc.ca

References

  • Biggs HM, Behravesh CB, et al. Diagnosis and management of tickborne rickettsial diseases: rocky mountain spotted fever and other spotted fever group rickettsioses, ehrlichioses, and anaplasmosis - United States. MMWR Recomm Rep. 2016;65(2):1-44.
  • Ehrlichiosis and anaplasmosis. EBSCO DynaMed website. Available at: https://www.dynamed.com/condition/ehrlichiosis-and-anaplasmosis.
  • Ehrlichiosis. Centers for Disease Control and Prevention website. Available at: http://www.cdc.gov/ehrlichiosis.
  • Snowden, Jessica, Bartman, Marc, Kong, Erwin, and Simonsen, Kari. Ehrlichiosis. StatPearls Journal of Clinical Sciences, 2021. Pubmed, https://www.ncbi.nlm.nih.gov/books/NBK441966/.

Contributors

  • April Scott, NP
Last Updated:
2023-06-01

This content is reviewed regularly and is updated when new and relevant evidence is made available. This information is neither intended nor implied to be a substitute for professional medical advice. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with questions regarding a medical condition.