Abstract
The taxonomy of a parasite can be an important guide to its pathogenic characteristics. A wide range of anatomical, biochemical and behavioral tests is now being developed to define different strains and subspecies of the main tropical parasites [Trypanosoma congolense, T. dimorphon, T. simiae, T. brucei sspp., T. cruzi, T. dionisii, T. vespertilionis, T. vivax, Entamoeba histolytica, E. moshkowskii, E. coli, Plasmodium berghei, P. yoeli, P. vinckei, P. falsiparum, P. chabaudi, Schistosoma mansoni, S. bovis, S. matthei, S. intercalatum, S. haematobium, Eimeria acervulina, E. mivati and E. meleagrimitis].