Figure. Phylogenetic comparison of the complete segments of Rift Valley fever viruses from South Africa, 2018, and reference isolates. A) Large segment; B) medium segment; C) small segment. Distinct clusters separate the isolates into 10 lineages (A, C, E, G, H, I, K, L, N, and M). Sequences RV2613/RSA/2018 are marked as South Africa, Jacobsdal (FS), 2018 in cluster K. GenBank accession numbers are provided. FS, Free State. Scale bars indicate nucleotide substitutions per site.