Emergence of the GI-23 lineage of infectious bronchitis virus in Brazilian backyard poultry.
Infectious bronchitis virus (IBV) remains a major threat to poultry production worldwide, with the GI-23 lineage emerging as one of the most epidemiologically relevant variants in recent years. Although GI-23 has been reported in Brazilian commercial poultry, its occurrence and genomic characteristics in backyard poult...