Officials with the Allegheny County Health Department and the General Services Administration, which runs the Moorhead Federal Building downtown, say the worker was apparently infected from suffering a cut during outdoor activity.
The man is not being identified due to patient confidentiality rules, but is being tested for the bacteria at Jefferson Regional Medical Center south of the city. The man is about 30 and is being treated with intensive antibiotics.
Health officials say the man faces possible amputation if the antibiotics don't work or the infection spreads. The bacteria that causes the condition is common, but only some people are susceptible to developing it.