Tosh C, Nagarajan S, Behera P, Rajukumar K, Purohi. Genetic analysis of H9N2 avian influenza viruses isolated from India. Arch Virol. 2008 Jun 22.
H9N2 avian influenza viruses are endemic in domestic poultry in Asia and are grouped into three major sublineages represented by their prototype strains A/Duck/Hong Kong/Y280/97 (Y280-like), A/Quail/Hong Kong/G1/97 (G1-like) and A/Chicken/Korea/38349-p96323/96 (Korean-like). To understand the genetic relationship of Indian viruses, we determined the partial nucleotide sequence of five H9N2 avian influenza viruses isolated from chicken in India during 2003-2004 and compared them with H9N2 sequences available in GenBank. Deduced amino acid sequence analysis revealed that four isolates shared an R-S-S-R/G motif at the cleavage site of HA, representing low pathogenicity in chickens, while one virus harbors an R-S-N-R/G motif at the same position. All the viruses maintained the human-like motif 226Lysine (H3 numbering) at the HA receptor binding site. Phylogenetic analysis showed that 50% of the genes (HA, NA, NP and M) were similar to G1-like viruses, whereas the remaining genes of the Indian isolates formed a separate, not yet defined, sublineage in the Eurasian lineage. Our finding provides evidence of a novel reassortant H9N2 genotype of G1-like viruses circulating in India.
See Also:
Latest articles in those days:
- Airway organoids reveal patterns of influenza A tropism and adaptation in wildlife species 3 hours ago
- Early nasal and lung transcriptomic profiles reveal pathways associated with divergent clinical outcomes following H7N1 high pathogenicity avian influenza virus infection 3 hours ago
- [preprint]Acquisition of specific human respiratory tract binding of 2.3.4.4b H5N1 hemagglutinins requires multiple mutations 3 hours ago
- [preprint]Infection of the bovine mammary gland by avian H5N1 subclade 2.3.4.4b influenza viruses 3 hours ago
- Imported case of avian influenza A(H9N2) virus infection in a patient with miliary tuberculosis, Italy, March 2026 2 days ago
[Go Top] [Close Window]


