Colorado inmate becomes first person in US to test positive for bird flu

Infection comes amid worst outbreak of the virus in seven years but CDC says health risk to general public remains low

An inmate in Colorado has become the first human in the US to test positive for the H5N1 strain of bird flu, amid the worst outbreak of the virus in seven years and a cull of millions of poultry in dozens of states.

The unnamed prisoner contracted the infection during a work release assignment at a farm in Montrose county where workers were euthanising an infected flock, the Colorado department of public health and environment said.