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Figure 1 | Veterinary Research

Figure 1

From: Virus persistence in pig herds led to successive reassortment events between swine and human influenza A viruses, resulting in the emergence of a novel triple-reassortant swine influenza virus

Figure 1

Unrooted phylogenetic trees of European swine and human influenza A viruses. A HA segment; B NA segment; C M segment; D Concatenation of the five other internal segments (PB2, PB1, PA, NP, NS). Phylogenetic trees were built with Seaview by maximum likelihood with the nucleotide substitution model HKY + G. The H1avN2 strains described in this study are indicated in bold. Only H1 and N2 subtypes were included in HA (A) and NA (B) trees, respectively.

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Veterinary Research

ISSN: 1297-9716