EDINBURG, Texas – Hidalgo County health officials reported four new West Nile Virus cases and three new cases of Dengue Fever on Monday. In September, 18 Texas counties reported having a case of West Nile virus, including Bexar County, according to state data. According to Olivarez, the West Nile cases were found in the Mercedes, Weslaco and Edinburg areas. County officials said that additionally, three other cases were reported to Hidalgo County a week ago. To protect yourself against either West Nile or Dengue, you must protect yourselves against mosquitoes.