Dallas county health authorities said Tuesday they have received confirmation of the first Zika virus case acquired through sexual transmission. In a statement, the Dallas County Health and Human Services said the patient was infected with the virus after having sexual contact with a sick person who returned from a country where Zika virus is present. Dallas authorities said they received confirmation from the Centers for Disease Control and Prevention. For medical confidentiality and personal privacy reasons, Dallas health authorities said they are not providing additional identifying information.