Table 6.

Viability of parasites treated with MEVT and AELN

Extracts	Conc.	Parasites
		B. bovis	B. bigemina	B. divergens	B. caballi	T. equi
MEVT	0.25 × IC50	+	+	+	+	+
	0.5 × IC50	+	+	+	+	+
	1 × IC50	+	+	+	+	+
	2 × IC50	+	+	+	+	+
	4 × IC50	+	–	+	–	+
	6 × IC50	–	–	–	–	–
AELN	0.25 × IC50	+	+	+	+	+
	0.5 × IC50	+	+	+	+	+
	1 × IC50	+	+	+	+	+
	2 × IC50	+	+	+	–	+
	4 × IC50	+	+	+	–	+
	6 × IC50	–	–	–	–	–
	Untreated control	+	+	+	+	+

Results are calculated as the mean values from three separate trials ± SD, a positive (+) indicates parasites regrowth, and a negative (−) shows the parasites total clearance after drug pressure withdrawal using microscopy assay