West Nile Virus Diagnosis

The doctor will ask about your symptoms and medical history. A physical exam will be done. He or she may inquire about:

• Recent mosquito bites
• Outdoor activities
• Use of insect repellent
• Travel to areas where West Nile is present

Some symptoms of this disease may be due to other conditions. Tests help determine the cause of the symptoms. Tests may include those listed here:

• Blood tests-for antibodies to the virus and to check for abnormalities associated with West Nile infection
• Lumbar puncture (spinal tap) -removal of a small amount of fluid from the spinal column to check for signs of infection
• MRI scan of the head-a test that uses magnetic waves to make pictures of the inside of the head; in this case to look for abnormal areas in the brain
• Electroencephalogram (EEG) -a test that records the brain's activity by measuring electrical currents through the brain
• Electromyography and nerve conduction studies-electrical current is measured in a muscle or passed through a nerve to determine the condition of that nerve and to determine the reason for muscle weakness