| protection by a commercial arkansas-type infectious bronchitis virus vaccine against a field isolate of the same serotype. | a late-breaking infectious bronchitis virus (ibv)-associated respiratory disease was a chronic problem in georgia broilers in 1995. the predominant virus isolated from diseased birds was the arkansas (ark) type of ibv. because broilers in georgia are currently vaccinated with the arkansas serotype, there was concern that a phenotypic and/or genotypic change had occurred in the field virus so it could break through immunity conferred by commercial vaccines. the purpose of this study was to determ ... | 1997 | 9454933 |
| isolation of georgia variant (georgia isolate 1992) infectious bronchitis virus but not ornithobacterium rhinotracheale from a kentucky broiler complex. | integrated broiler production operations in western kentucky have been very successful. the reason for this success includes the fact that flocks are free of many endemic diseases for a period of time, often years, because birds are raised in virgin, disease-free territory. this case report documents that importation of birds from an area with endemic georgia variant (ga-92) infectious bronchitis virus and ornithobacterium rhinotracheale (ort) bacterial infection resulted in introduction of ga-9 ... | 1998 | 9777165 |
| genotyping of newly isolated infectious bronchitis virus isolates from northeastern georgia. | sixteen infectious bronchitis virus (ibv) field isolates obtained from vaccinated commercial broiler chickens showing clinical respiratory disease were characterized by reverse transcriptase-polymerase chain reaction and sequence analysis of the hypervariable region of the s1 spike glycoprotein gene. the genetic relationship among these variants and reference strains was determined by phylogenetic analysis and use of the basic local alignment search tool. all the isolates formed a distinct phylo ... | 2010 | 21313832 |