Principal component analysis (PCA) of Trypanosoma vivax populations. PCA analysis of 61 isolates from South America (47), West Africa (12) and East Africa (2) based on data from 7 microsatellite multiloci genotyping (MLG). Multidimensional scaling plots of genetic distances: Principal coordinate 1 separates South American and African populations besides evidencing the genetic diversity within both populations, notable in Africa. Principal coordinate 2 separates Venezuelan from most isolates from Brazil highlighting the more homogeneous Brazilian population compared to populations in Venezuela. Codes represent individual isolates and colours their respective genotypes (MLGs) and groups of isolates from South America (TviBr = Brazil, TviVz = Venezuela, TviGuyane = French Guiana), West Africa (TviBf = Burkina Faso, TviK = Ghana, TviBan = Benin, IL700 = Nigeria, Gambia = The Gambia) and East Africa (TviMz = Mozambique).