Table 1.

Surface structure of Blastocystis sp. isolates of GI (CRC group), GII (Non-CRC symptomatic sub-group) and GIII (Non-CRC asymptomatic sub-group) under SEM examination

SEM	GI (N = 7)	GII (N = 6)	GIII (N = 6)	P value
Description	Organisms with a coarse and intensely folded surface with marked surface irregularity in organisms of all seven isolates	Organisms with slightly rough surface with tiny pores in organisms of all six isolates	Organisms with smooth surface in organisms of all six isolates of the group	P  < 0.001

N = number of isolates in the group. Comparison by One-way ANOVA test, where: P value = Probability value, where: P < 0.01 = highly significant difference