Chris Froome finally clear of parasitic disease "At last I am free of the debilitating disease bilharzia," he says. I had a test when I went back to Kenya recently and it is the first time it has come back negative since the diagnosis [in 2009]. That is fantastic news for me. I'm not going to have to worry about that any more. That should be it gone now. I have been going back every six months for the past two years and returning positive results. When I was first diagnosed they said it had been in my system for at least two years, but it could have been there even longer, five or six years possibly.