Close Russia has now recorded its first human case of H5N8 bird flu. Technically, this is also the world's first cases of H5N8 avian influenza. World's bird flu cases (Photo : (Photo by China Photos/Getty Images) A worker disinfects chickens transported to a chicken slaughtering factory on May 4, 2006 in Xining of Qinghai Province, China. Surveillance has been stepped up in Qinghai Province following the discovery of a dead wild goose carrying the bird flu virus in Gangcha County. The Ministry of Agriculture said on April 30 that the dead bar-headed goose found in the county tested positive...