Table 1. Changes in IFN-γ ELISPOT T cell responses specific for T. cruzi antigens in long-term follow-up of chronic Chagas disease patients treated with benznidazole.

Patient group	N	Clinical stage		IFN-γ-ELISPOT responses	IFN-γ-ELISPOT responses
				at 36 months post-treatment	48–72 months post treatment
		G0	G1	relative to pretreatment A [30]
1	12	9	3	Became undetectable	Rebound
2	6	5	1	Decreased	Unchanged
3	5	4	1	Became detectable B	Unchanged
4	8	7	1	Unchanged	Unchanged

Note^{. A} Ages are not significant different among groups.

^B IFN-γ-producing T cells are undetectable prior to treatment and became detectable following treatment.