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  • Title: Whole genome sequences of H5N1 influenza a virus isolated from a little grebe in Thailand.
    Author: Naksupan N, Sanguansermsri D, Wongvilairat R, Niumsup PR, Pongcharoen S, Chamnanpood P, Chamnanpood C, Sanguansermsri P.
    Journal: Southeast Asian J Trop Med Public Health; 2008 May; 39(3):373-82. PubMed ID: 18564674.
    Abstract:
    This is the first report of the whole genome sequence of influenza A virus in an aquatic resident bird of Thailand. It was categorized into genotype Z according to its characteristics of a 20 amino acid deletion in neuraminidase and a five amino acid deletion in the nonstructural protein. The indicator for a highly pathogenic trait of the virus is the presence of a polybasic amino acid sequence at the cleavage site of HA0. The feature of resistance to the antiviral drug amantadine is found at the 31st amino acid position of M2 (serine to asparagine). Phylogenic analyses revealed that virus A/little grebe/Thailand/Phichit-01/2004 (H5N1) is closely related to the chicken and human isolates recovered from Thailand. The high degrees of similarity among the sequences and phylogenic trees indicate there was no difference between the viruses isolated from poultry and aquatic birds in Thailand at the time of study. The results also suggest the source of H5N1 avian influenza virus in the little grebe and others in Thailand may have the same origin.
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