Fig 3. Phylogenetic tree based on the mitochondrial sequences (COI, 658 bp) of specimens identified as Simulium dentulosum and Simulium vorax from Kakoi-Koda Focus.

The analysis was performed with Bayesian inference under the GTR + I + G model of sequence evolution. The green and red colours indicate specimens identified as “infected” by either O. volvulus and O. ochengi and “infective” for O. volvulus, respectively. The sequenced S. vorax specimen was infected with O. volvulus. Posterior probabilities are indicated at the nodes. GenBank accession numbers of sequences are indicated between brackets.