| laboratory investigation of the first suspected human cases of infection with avian influenza a(h5n1) virus in bulgaria. | reports of human cases of infection with avian influenza a(h5n1) virus have received increased public attention because of the potential for the emergence of a pandemic strain. in the end of 2005 and the beginning of 2006, avian influenza a(h5n1) virus caused outbreaks among domestic poultry and was isolated from wild swans in many european countries, including bulgaria. between january and march 2006, samples were collected from 26 patients who had been in close contact with ill or dead birds a ... | 2008 | 18761909 |