Figure 2. Phylogenetic analysis of the 3′ end nucleotide sequence of the N protein gene (A) and of the 777–1148 nt sequence of the F protein gene (B) of 11 peste des petits ruminant (PPR) virus samples selected from 2 lineage IV clusters and from lineage III as defined in Figure 1. Other designated strains were as published (10,20–22). The phylogram was generated by analyzing 1,000 bootstrap replicates; clusters were supported by bootstrap percentages >70%. Strains from Sudan are represented by prefixes: cam, camel; cap, caprine; ov, ovine. The Kabete 0 strain of rinderpest (RBOK) vaccine strain of rinderpest virus retrieved in GenBank (accession no. Z30697) was used as an outgroup. Scale bars indicate nucleotide substitutions per site.