Comparison of tree topology after phylogenetic reconstruction on the 741 complete F gene sequences using four phylogenetic methods: (a) Maximum Likelihood (ML), (b) Bayesian (MrBayes), (c) Maximum Parsimony (MP), and (d) Neighbor Joining (NJ).

<p>Branch support values correspond to 1000 bootstrap replicates for ML, MP, and NJ, and posterior probabilities estimated for 10,000 samples of the Markov chain for MrBayes. The area of the triangle is proportional to the number of isolates within the genotype.