HOUSTON -

A fourth human West Nile virus case has been reported in Houston.

According to the city of Houston Health Department, a southeast woman between the ages of 45 and 54 has been diagnosed with the virus.

The woman's case is the fourth in the city in 2012. One of the cases has been fatal.

A southwest Houston man between the ages of 75 and 84 died on Aug. 1.

A northeast Houston woman between the ages of 55 and 74 and a southeast Houston woman between the ages of 55 and 74 have also been diagnosed with West Nile virus.

Most people become infected within three to 10 days of a bite from an infected mosquito.

Symptoms include fever, headache, body tremors and visual problems.

According to doctors, if you start to feel any of these things to seek medical help, right away.