NACOGDOCHES, TX (KTRE) - Doctors find out if a person has swine flu by taking a nasal swab culture. All of the hospitals in our area are prepared to conduct the test and do the lab work. Right now it's being done primarily on people who show at least two symptoms of flu. Doctors also ask the patient if they've been to Mexico in the last seven days or have been exposed to someone with the flu. "You do two swabs. You send them to the hospital usually and they check for Type A flu, influenza," explained Dr. W.E. Furniss, a family physician. "If you get a positive on the type a flu screen then they send it onto Tyler where they can do a specific test for the swine flu."