A Colorado prison inmate has tested positive for bird flu in the first recently confirmed case of a human infected with the disease that has resulted in the deaths of millions of chickens and turkeys, but federal officials say they still see little threat to the general public.A Colorado prison inmate has tested positive for bird flu in the first recently confirmed case of a human infected with the disease that has resulted in the deaths of millions of chickens and turkeys, but federal officials say they still see little threat to the general public.