Fig. 1
Phylogenetic relationship between different Trichuris populations inferred by Neighbor Joining (NJ) tree based on the rrnL gene and the Tamura-Nei with gamma distribution model. Seven major clades were identified and are indicated by different colors. T. trichiura from humans from Uganda clustered in one clade together with most Trichuris from baboons and African green monkey and are indicated by the maroon color (
). Seven Trichuris from baboons and one from African green monkey clustered in a distinct clade and are indicated by the red color (
). T. trichiura from China were distinct and are indicated by the green color (
) while worms from Ecuador are indicated by light green (
). The other three clades include Trichuris from pigs. T. suis populations from USA and Denmark clustered together and are indicated by the blue color (
), whereas T. suis from China and Uganda are indicated by pink (
) and purple (
), respectively. Sample key are: B: Baboon, H: Human, P: Pigs, Gm: African green monkey; US, USA; Ch, China; UG, Uganda; DK, Denmark (C for Copenhagen Zoo and K for Knuthenborg)