Identification of coevolution sites and evolution history for neuraminidase of human influenza A viruses

A recent study in this journal compared codon usage among NA subtypes (N1, N2, N6, and N8)  of H5Nx highly pathogenic avian influenza A viruses (HPAIVs) and suggested that codon usage in N1 subtype is better adapted to its host than the epidemic NA subtypes (N6 and N8), which had fewer number of human cases compared to the N1 subtype.1 To date, there are 18 known HA subtypes (H1-H18) and 11 known NA subtypes (N1-N11)2. However, only N1 and N2 subtypes have been reported to cause pandemics (H1N1 for the 1918 and 2009 pandemics; H2N2 for the 1957 pandemic; and H3N2 for the 1968 pandemic) or seasonal outbreaks in humans3.
Source: Journal of Infection - Category: Infectious Diseases Authors: Tags: Letter to the Editor Source Type: research

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