TABLE III. Effect of 24 h-treatment with Piper aduncum essential oil (PaEO) on Trypanosoma cruzi intracellular amastigotes in Vero cells, compared with benznidazole (BZ).

	Concentration (µg/mL)	Infected cells (%)	Amastigotes per cell	Infection index (II)	II decrease
PaEO	0	79.1	7.1	562.1	0
	12.5	54.6	2.9	160.1	71.5
	50	32.5	0.4	12.7	97.7
	100	0	0	0	100
BZ	0	87.3	11.5	1003.7	0
	10	74.9	2.5	187.2	81.3
	50	0.4	0.9	0.3	99.9