Table 2.

Anthelmintic activity of the chloroform extract of I. cylindrica on R. tetragona

Treatment	Dose (mg/ml)	Normalised survival time (hour) in mean ± SD	t value	t critical value
Control	0	100.00 ± 2.00	NA	NA
Albendazole	1.25	024.07 ± 1.62*	114.35	2.05
	2.5	020.51 ± 1.21*	131.56	2.07
	5	016.56 ± 0.99*	144.85	2.08
	10	012.22 ± 1.05*	150.56	2.08
	20	004.70 ± 0.84*	170.05	2.09
I. cylindrica extract	1.25	091.81 ± 2.36*	010.25	2.05
	2.5	089.40 ± 1.71*	015.60	2.05
	5	082.48 ± 3.02*	018.74	2.06
	10	064.73 ± 2.55*	042.15	2.06
	20	036.53 ± 2.67*	073.85	2.06

NA Not applicable; n = 15; t value is the calculated difference represented in units of standard error, the higher the value, the greater the evidence against the null hypothesis; t critical value denotes the value that must be exceeded to get a significant level

*Significantly different at p < 0.05 against control