140313150641-hiv-virus-microscope-story-topA Texas woman apparently contracted HIV through sexual contact with another woman, the Centers for Disease Control reported Thursday, a rare female-to-female transmission of the virus. Testing confirmed the 46-year-old woman with newly diagnosed HIV “had a virus virtually identical to that of her female partner, who was diagnosed previously with HIV and who had stopped receiving antiretroviral treatment in 2010,” according to the CDC’s Weekly Morbidity and Mortality Weekly Report. HIV transmission through female-to-female sexual contact “has been reported rarely and is difficult to ascertain,” officials said. Past confirmation of such transmission “has been difficult because other risk factors almost always are present or cannot be ruled out,” the report said. “In this case, other risk factors for HIV transmission were not reported by the newly infected woman, and the viruses infecting the two women were virtually identical.” MORE