Table 1.

The mortality rate of G. intestinalis cysts in the presence of different concentrations of commercially available chitosan and given different exposure times

Exposure time/concentration	50 μg/ml	100 μg/ml	200 μg/ml	400 μg/ml	P value	Control group
10 min	7	9	13	19	0.155	7
30 min	29	31	47	53	0.011	9
60 min	57	63	69	76	0.001	9
180 min	79	84	93	100	0.0001	8
P value	0.081	0.056	0.027	0.013	–	–