VirusDisease

, Volume 27, Issue 4, pp 382–386 | Cite as

Isolation and phylogenetic characterization of haemagglutinin and neuraminidase genes of H9N2 low pathogenicity avian influenza virus isolated from commercial layers in India

  • Vasudevan Gowthaman
  • Shambu Dayal Singh
  • Kuldeep Dhama
  • Palani Srinivasan
  • Sellappan Saravanan
  • Thippichettypalayam Ramasamy Gopala Krishna Murthy
  • Kuppanan Sukumar
  • Basavaraj Mathapati
  • Camille Lebarbenchon
  • Yashpal Singh Malik
  • Muthannan Andavar Ramakrishnan
Original Article

Abstract

Avian influenza is a highly infectious and dynamically evolving disease of birds causing high morbidity and mortality. It is caused by avian influenza virus (AIV) that belongs to the family Orthomyxoviridae. Two types of AIV have been described based on their pathogenicity viz. highly pathogenic avian influenza virus that causes severe disease with high mortality and low pathogenic avian influenza virus (LPAI) that generally causes asymptomatic infection or a mild disease. The H9N2 subtype is the widely circulated LPAI type in the world. The H9N2 subtype of was first reported from northern India in March 2003. However, systematical surveillance information for the evolution of H9N2 viruses in poultry flocks of Southern India is lacking. The present study reports the isolation and characterization of H9N2 isolates from the southern parts of the country during the period between May 2010 and September 2011. Out of the 30 poultry flocks investigated, six were found to be positive for HA activity. Further, all the six samples conformed as AIV. Partial nucleotide sequencing of the HA and NA genes revealed that all were belonging to the H9N2 subtype. Phylogenetically, the HA and NA genes of the H9N2 viruses from India clustered with those isolated from Bangladesh, Pakistan and the Middle East, although we were not able to conclude on their exact geographic origin.

Keywords

LPAI-H9N2 Haemagglutinin Neuraminidase Characterization India 

Supplementary material

13337_2016_350_MOESM1_ESM.png (2.9 mb)
Fig S1Detailed maximum likelihood consensus tree derived from 178 H9 Influenza A virus hemagglutinin nucleotide sequences. Computations were realized with the GTR + I + α evolutionary model (I = 0.42; α = 1.13). Blue branches highlight viruses isolated in India. Sequences generated in this study and corresponding accession numbers are indicated in bold. Red dots indicated bootstrap values higher than 80 (PNG 2934 kb)
13337_2016_350_MOESM2_ESM.png (2.6 mb)
Fig S2Detailed maximum likelihood consensus tree derived from 160 N2 Influenza A virus neuraminidase nucleotide sequences. Computations were realized with the GTR + I + α evolutionary model (I = 0.29; α = 0.72). Blue branches highlight viruses isolated in India. Sequences generated in this study and corresponding accession numbers are indicated in bold. Red dots indicated bootstrap values higher than 80 (PNG 2643 kb)

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Copyright information

© Indian Virological Society 2016

Authors and Affiliations

  • Vasudevan Gowthaman
    • 1
    • 2
  • Shambu Dayal Singh
    • 1
  • Kuldeep Dhama
    • 1
  • Palani Srinivasan
    • 2
  • Sellappan Saravanan
    • 2
  • Thippichettypalayam Ramasamy Gopala Krishna Murthy
    • 2
  • Kuppanan Sukumar
    • 3
  • Basavaraj Mathapati
    • 4
  • Camille Lebarbenchon
    • 5
  • Yashpal Singh Malik
    • 6
  • Muthannan Andavar Ramakrishnan
    • 4
  1. 1.Avian Diseases Section, Division of PathologyIndian Veterinary Research InstituteIzatnagarIndia
  2. 2.Poultry Disease Diagnosis and Surveillance LaboratoryVeterinary College and Research Institute Campus, Tamil Nadu Veterinary and Animal Sciences UniversityNamakkalIndia
  3. 3.Department of Veterinary MicrobiologyVeterinary College and Research InstituteNamakkalIndia
  4. 4.Division of VirologyIndian Veterinary Research InstituteMukteswarIndia
  5. 5.UMR Processus Infectieux en Milieu Insulaire Tropical, INSERM U1187, CNRS 9192Université de La RéunionSaint Denis, Reunion IslandFrance
  6. 6.Division of Biological StandardizationICAR-Indian Veterinary Research InstituteIzatnagarIndia

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