Encephalitis is inflammation of the brain usually caused by a viral infection. Severe cases can cause brain damage, even death.
Fever, headache and stiff neck are common signs and symptoms of meningitis — an infection of the membranes and fluid surrounding the brain and spinal cord.
Coma is often a complication from a severe brain injury that leaves a person unconscious and unresponsive. Many people recover from this condition.
Fatigue can signal many things. Here are some tips to help you decipher why you're wiped out and to regain your energy.
Most headaches aren't caused by a serious illness, but some could be a sign of a life-threatening condition.
Tests and diagnosis
MRI uses a magnetic field and radio waves to create detailed images of the organs and tissues within your body.
Dec. 18, 2012
- West Nile virus: Questions and answers. Centers for Disease Control and Prevention. http://www.cdc.gov/ncidod/dvbid/westnile/qa/symptoms.htm. Accessed Sept. 5, 2012.
- West Nile virus: Fact sheet. Centers for Disease Control and Prevention. http://www.cdc.gov/ncidod/dvbid/westnile/wnv_factSheet.htm. Accessed Sept. 5, 2012.
- Petersen LR. Clinical manifestations and diagnosis of West Nile virus infection. http://www.uptodate.com/ index. Accessed Sept. 5, 2012.
- Ferri FF. Ferri's Clinical Advisor 2013: 5 Books in 1. Philadelphia, Pa.: Mosby Elsevier; 2012. http://www.mdconsult.com/books/about.do?eid=4-u1.0-B978-0-323-08373-7..00002-9&isbn=978-0-323-08373-7&about=true&uniqId=343863096-23. Accessed Sept. 6, 2012.
- West Nile virus. National Institute of Allergy and Infectious Diseases. http://www.niaid.nih.gov/topics/westnile/understanding/pages/what.aspx. Sept. 6, 2012.
- Centers for Disease Control and Prevention, et al. West Nile virus and other arborviral diseases — United States, 2011. MMWR. 2012;61:510. http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6127a3.htm?s_cid=mm6127a3_w. Accessed Sept. 5, 2012.
- Petersen LR. Treatment and prevention of West Nile virus infection. http://www.uptodate.com/ index. Accessed Sept. 5, 2012.
- Updated information regarding insect repellants. Centers for Disease Control and Prevention. http://www.cdc.gov/ncidod/dvbid/westnile/RepellentUpdates.htm. Accessed Sept. 7, 2012.
- Anderson CF (expert opinion). Mayo Clinic, Rochester, Minn. Sept. 10, 2012.
- Mahoney KR (expert opinion). Food and Drug Administration, Rockville, Md. Jan. 10, 2011.
You Are ... The Campaign for Mayo Clinic
Mayo Clinic is a not-for-profit organization. Make a difference today.