“…Recently, another group used the 18S rRNA as a genetic marker to build an evolutionary tree for human and primate trypanosomes and observed that the single T. rangeli strain isolated from a dog in Venezuela was grouped within the cruzi-clade, together with the bat trypanosomes T. marinkellei, T. dionisii, T. vespertilionis, that are not transmitted by triatomine bugs, and with T. cruzi that is transmitted through feces (Stevens et al 1998).…”