Table 5. Distribution of Entamoeba positives in each grade for school A.

Educational stage	Grade	No. of students	No. of positives (%)
			E. histolytica	E. dispar	E. coli
Kindergarten	1	66	0 (0)	1 (1.5)	9 (13.6)
	2	55	0 (0)	2 (3.6)	10 (18.2)
Primary school	1	75	0 (0)	2 (2.7)	13 (17.3)
	2	74	0 (0)	2 (2.7)	22 (29.7)
	3	71	0 (0)	1 (1.4)	23 (32.4)
	4	70	1 (1.4)	6 (8.6)	20 (28.6)
	5	68	7 (10.3)	19 (27.9)	12 (17.6)
	6	90	10 (11.1)	2 (2.2)	22 (24.4)
Secondary school	1	83	1 (1.2)	2 (2.4)	23 (27.7)
	2	77	1 (1.3)	1 (1.3)	22 (28.6)
	3	79	0 (0)	1 (1.3)	13 (16.5)
Total		808	20 (2.5)	39 (4.8)	189 (23.4)