Table 3.

Description of Trypanosoma cruzi I Spliced Leader Intergenic region (SL-IR) groups identified from reference cultured stocks.

SL-IR group	Tc I stock	Reference	Geographical origin	Biological origin
Tc Ia	TCC	1	Tulahuen, Chile	Human
	K98	2	San Luis, Argentina
	CA-I CL72	3	San Luis, Argentina
	MIRANDA CL78	3	Argentina
Tc Id	G	4	Amazon region, Brazil	Didelphis marsupialis
	D11	5	Amazon region, Brazil
	EP	6	Cojedes, Venezuela	Human
	Sylvio X10	7	Pará, Brazil
Tc Ie	13379 cl7	8	Santa Cruz, Bolivia	Human
	SE 9V	9	Santiago del Estero, Argentina

References: 1, Basombrío el al., 1982; 2, Gonzalez Cappa et al., 1999; 3, ATCC T. cruzi strains; 4, Yoshida, 1983; 5, Verbisck et al., 1998; 6, Torrealba A.B., 1970. Observaciones sobre el Comportamiento en Ratón Blanco de una Cepa Humana de Trypanosoma cruzi. Pregrade Thesis. Universidad Central de Venezuela. Caracas, Venezuela; 7, Postan et al., 1983; 8, Tibayrenc and Miles, 1983; 9, Macina et al., 1987.