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Molecular phylogenetic analysis of the five Culex flavivirus (CxFV) strains based on the nucleotide sequence of the envelope gene. The maximum likelihood tree was constructed by the GTR + I + R model. Bootstrap values (1000 replicates, not shown for less than 60%) of maximum likelihood, neighbour-joining, and Bayesian analyses are shown above the main lineages. The bar indicates 0.01 substitutions per site. Dark grey and light grey indicate CxFV genotype I and genotype II, respectively
