Comamonas sp. from Spirocerca lupi is closely related to soil derived Comamonas spp. and to Comamonas spp. from blood feeding arthropods. Phylogenetic analysis based on maximum likelihood tree (1000 bootstraps) constructed with 16S rDNA sequences of various Comamonas species from different origin and host species. Host species are marked with asterisks. Published GenBank accession numbers are noted for each species. Bootstrap values are indicated on branches.