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:
- The surveillance programme for avian influenza (AI) in Norwegian wildlife 2025 1 hours ago
- The surveillance programme for avian influenza (AI) in poultry in Norway 2025 2 hours ago
- Emergence of Novel Reassortant H3N2 Avian Influenza Viruses in Southern China: Genetic Complexity and Pathogenicity in Chickens and Mice 2 hours ago
- Pathological evidence of neurotropism and oculotropism in wild black-headed gulls naturally infected with H5N1 high pathogenicity avian influenza 2 hours ago
- Birth cohort effects in adults associated with influenza A(H1N1)pdm09 vaccine effectiveness 14 hours ago
[Go Top] [Close Window]


