Table 2 Comparison of the prevalence of intestinal parasitic infections in 507 rural schoolchildren aged 6–10 years between two Mexican states.

Polyparasitism^b

51 (182)

42–60

54 (82)

48–59

0.77

Helminth Infection^c

33 (117)

25–41

53 (80)

47–59

<0.0001

Protozoan Infection^d

61 (217)

53–69

70 (106)

65–75

0.39

Pathogenic sp.

   A. lumbricoides

7 (25)

3–11

3 (5)

1–5

0.18

   T. trichiura

11 (39)

6–17

12 (18)

8–16

0.89

   G. duodenalis

31 (110)

24–39

23 (35)

19–28

0.22

   E. histolytica/dispar

7 (25)

4–13

2 (3)

1–3

0.06

   H. nana

25 (89)

20–29

23 (35)

16–30

0.81

Non-pathogenic sp.

   E. coli

40 (142)

32–49

53 (27)

48–58

0.11

   E. nana

35 (125)

28–43

42 (63)

37–47

0.39