West Nile Infection

General or Other | General Practice | West Nile Infection (Disease)


West Nile infection is caused by a virus that can infect humans, birds, horses and mosquitoes. Infection with this virus is most commonly found in Africa, West Asia and Middle East.

Most people who are infected with West Nile virus have no symptoms. Others may have mild symptoms. Symptoms include: rash; fever; headaches; nausea; vomiting; diarrhea; loss of appetite; swollen lymph nodes; a sense of back and muscle pain.

Symptoms usually occur 3-14 days after a person is bitten by an infected mosquito. More severe symptoms of West Nile virus disease: sudden high fever (above 39 ° C); severe headaches; feeling disoriented or confused; muscle tremor; seizures; coma; weakness or partial paralysis.

These symptoms may last several weeks. In rare cases, West Nile virus causes swelling of the brain - encephalitis or swelling of the membrane around the brain and spinal cord called meningitis. This can lead to permanent brain damage or death. Even in areas where the virus has been reported, it is very unlikely for a person to be her worst in a mosquito bite.

People over 50 years and persons with weakened immune systems most at risk of becoming seriously ill from West Nile virus. Less than 1% of people infected with West Nile virus become seriously ill. However, most people who are infected with West Nile virus, or do not develop symptoms or mild symptoms. Less than 1% of those infected develop more severe West Nile virus, and most of these people can fully recover using treatments.

Causes and Risk factors

A mosquito becomes infected when it feeds on the blood of a bird that is carrying West Nile virus. About 2 weeks later, the mosquito is capable of spreading the virus to people and animals while biting for a blood meal. The virus is not spread from person to person, and cannot be spread directly from infected animals, such as birds, horses or pets, to people.

Diagnosis and Treatment

There is no specific treatment for West Nile virus infection. People with mild symptoms usually better to stay a few days without any medicine. People with serious illnesses are hospitalized and given intravenous therapy, ventilator to help him breathe.

Unfortunately there is no vaccine to prevent West Nile virus in humans inca. The best way to avoid infection West Nile virus is to reduce the number of mosquitoes. ...