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VP1 phylogenetic tree for foot-and-mouth disease virus (FMDV) serotype A inferred using the maximum likelihood method based on the Tamura-Nei model. Branch lengths indicate the number of substitutions per site. Bootstrap values ≥60% are indicated at the nodes. Novel Nigerian FMDV from this study from Kaduna is indicated with •, from Bauchi with ■, from Oyo with ▴ and from Benue with ♦.
