| characterization of a new genotype and serotype of infectious bronchitis virus in western africa. | between 2002 and 2007, more than 1000 chickens from commercial farms, live bird markets and backyard farms in nigeria and niger were tested for the presence of the infectious bronchitis virus (ibv) genome. phylogenetic analysis of full-length sequences of the spike 1 (s1) gene revealed a new genotype of ibv that we refer to as 'ibadan'. the minimum genetic distance to the closest 'non-ibadan' strains (uk/7/93 at the nucleotide level; h120 and m41 at the amino acid level) reached 24 and 32 % at t ... | 2009 | 19625463 |