Emergence of a novel reassortant highly pathogenic avian influenza clade 2.3.4.4b A(H5N2) Virus, 2024

Reassortant highly pathogenic avian influenza A(H5N2) clade 2.3.4.4.b viruses were detected from ducks and environmental samples in Egypt, June 2024. Genomic and phylogenetic analyses revealed a novel genotype produced by the reassortment of an A(H5N1) clade 2.3.3.4b virus with an A(H9N2) G1-like virus. Monitoring the spread of this virus is important.

2024年6月，在埃及的鸭群及环境样本中检出重配型高致病性甲型禽流感A(H5N2)进化分支2.3.4.4.b病毒。基因组学与系统发育分析显示，该病毒系由甲型禽流感A(H5N1)进化分支2.3.3.4b病毒与甲型禽流感A(H9N2)G1类病毒发生重配所形成的新型基因型。对该病毒的传播开展监测具有重要意义。