West Nile Virus

As of September 6, 2017 – Birmingham, AL The Jefferson County Department of Health has identified three Jefferson County residents who tested positive for the West Nile Virus (WNV) disease. During the summer months this is not uncommon due to warm weather and standing water which increases mosquito breeding and activity.

  • 2 of the 3 patients are still in the hospital receiving treatment
  • The 3 cases came from West End, Southside and Kimberly
  • Only 1 out of every 100 cases is severe enough to cause the need for medical attention (There is no need to panic. Please see precautions list below.)


Approximately one in five people who are infected with WNV will develop symptoms such as fever, headache, body aches, joint pains, vomiting, diarrhea or rash. Less than 1 percent will develop a serious neurologic illness such as encephalitis or meningitis (inflammation of the brain or surrounding tissues); however, because the symptoms are more severe, these cases are more likely to be tested and reported. When a person is infected, early recognition and prompt supportive treatment for these illnesses can substantially lower the risk of developing severe disease. People over 50 years of age and those with certain medical conditions, such as cancer, diabetes, hypertension, kidney disease and organ transplants, are at greater risk for serious illness. WNV is transmitted by mosquitoes after they feed on birds infected with the virus. The same mosquitoes can then infect mammals, particularly humans and horses. Like humans, horses can sometimes become seriously ill from these infections.

Although effective vaccination is available for horses, there are no commercially available medications for treatment or vaccines for prevention for humans. People with milder illnesses typically recover on their own, although symptoms may last for several weeks. In more severe cases, patients often need to be hospitalized to receive supportive treatment, such as intravenous fluids, pain medication and nursing care. Anyone who has symptoms that cause concern should contact a health care provider. According to the Centers for Disease Control and Prevention, the best way to prevent mosquito-borne diseases is to avoid mosquito bites by following these recommendations:

  • Use EPA-registered insect repellents containing DEET, picaridin, oil of lemon eucalyptus, or IR3535
  • Wear long sleeves and pants during dawn and dusk
  • Install or repair screens on windows and doors. Use air conditioning, if available
  • Empty standing water from items outside homes, such as flowerpots, buckets and children’s pools