A worker sprays disinfectant at a poultry farm in Karachi
A worker sprays disinfectant at a poultry farm in Karachi February 2, 2008. Pakistani authorities have detected an outbreak of the H5N1 strain of bird flu at a poultry farm on the outskirts of its biggest city, Karachi, but officials said on Friday there was no likelihood of any human infection. REUTERS/Athar Hussain (PAKISTAN)