Much like everything with ED, I'm suspicious. Seems odd to me the producers would allow a HG to spend a week in the game prior to getting around to running tests on their physicals.
I read the people magazine article online just now and there is also an interview with him and Dr. Jenn. Says he took a test and it came back positive, they did another that came back negative and while in the house, a third test came back positive (at least that's how I understood the article). That's when they notified him of the results and he left the house.