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| Educational stage | Grade | No. of students | No. of positives (%) | ||
|---|---|---|---|---|---|
| E. histolytica | E. dispar | E. coli | |||
| Secondary school | 1 | 78 | 3 (3.8) | 0 (0) | 15 (19.2) |
| 2 | 55 | 4 (7.3) | 0 (0) | 6 (10.9) | |
| 3 | 40 | 0 (0) | 0 (0) | 4 (9.8) | |
| 4 | 93 | 1 (1.1) | 7 (7.5) | 12 (12.9) | |
| 5 | 56 | 0 (0) | 0 (0) | 8 (14.3) | |
| 6 | 59 | 0 (0) | 0 (0) | 5 (8.8) | |
| Total | 381 | 8 (2.1) | 7 (1.8) | 50 (13.1) | |
