Health officials in the US state of Texas say they have recorded the first case of the Zika virus transmitted by a local mosquito. Up until now, all Zika cases in Texas have been contracted while travelling. <br/><br/>The virus, which started spreading rapidly through the Americas last year, has been linked to microcephaly, a rare birth defect. Florida is the only other US state to have reported locally caught cases of Zika. The Texas Department of State Health Services said, the patient was a woman living in Cameron County, near the Mexican border.