DefinitionBy Mayo Clinic staff
Ehrlichiosis is a bacterial illness transmitted by ticks that causes flu-like symptoms. The signs and symptoms of ehrlichiosis range from mild body aches to severe fever and usually appear within a week or two of a tick bite. If treated quickly with appropriate antibiotics, ehrlichiosis generally improves within a few days.
Another tick-borne infection — anaplasmosis — is closely related to ehrlichiosis. But the two have distinct differences and are caused by different microorganisms.
The best way to prevent these infections is to avoid tick bites. Tick repellents, thorough body checks after being outside and proper removal of ticks give you the best chance of avoiding ehrlichiosis.
- Ehrlichiosis. Centers for Disease Control and Prevention. http://www.cdc.gov/ehrlichiosis. Accessed May 3, 2012.
- Other tick-borne diseases. American Lyme Disease Foundation. http://www.aldf.com/Ehrlichiosis.shtml. Accessed May 3, 2012.
- Hay WW, et al. Current Diagnosis & Treatment: Pediatrics. 20th ed. New York, N.Y.: The McGraw-Hill Companies; 2011. http://www.accessmedicine.com/content.aspx?aID=6589902. Accessed May 3, 2012.
- Longo DL, et al. Harrison's Online. 18th ed. New York, N.Y.: The McGraw-Hill Companies; 2012. http://www.accessmedicine.com/content.aspx?aID=9102446. Accessed May 3, 2012.
- Graham J, et al. Tick-borne illnesses: CME update. Pediatric Emergency Care. 2011;27:141.
- Ismail N, et al. Human ehrlichiosis and anaplasmosis. Clinical Laboratory Medicine. 2012;30:261.
- Lyme disease. American Lyme Disease Foundation. http://www.aldf.com/lyme.shtml#removal. Accessed May 4, 2012.
- Preventing tick bites. Centers for Disease Control and Prevention. http://www.cdc.gov/ticks/avoid/on_people.html. Accessed May 4, 2012.