| s1 and n gene analysis of avian infectious bronchitis viruses in taiwan. | the disease caused by infectious bronchitis virus (ibv) produces great economic for the poultry industry. the purpose of this study is to investigate the molecular epidemiology of ibv in taiwan. an old ibv strain isolated in 1964 and another 31 strains isolated from 1991 to 2003 were selected for n-terminal s1 gene analysis. based on their phylogenetic tree, 13 strains were selected for sequencing the entire s1 and partial nucleocapsid (n) genes. the results indicated that taiwanese ibv strains ... | 2004 | 15529980 |