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Table 1 Helminth infection prevalence and intensity by gender and age group (in years), Saravane district, 2010 (n = 574)

From: Helminth infection in southern Laos: high prevalence and low awareness

Item

n (%)

Male

Female

<6

6-15

16-29

30-39

40-49

50-59

60+

Opisthorchis viverrini

509 (88.7)

91.2

86.1

72.6

87.0

88.8

91.3

98.3

95.2

100

GM faecal egg count (range), EPG:

925* (24 – 69,648)

1100.3

771.5

221.6

406.0

1337.9

1388.7

2508.7

1890.7

2162.9

Intensity infection:

          

 Light (1–999 EPG)

261 (51.3)

47.7

55.0

88.7

70.9

45.0

36.9

28.1

30.0

33.3

 Moderate (1000–9999 EPG)

184 (36.1)

38.1

34.1

9.43

23.9

40.5

48.8

49.1

50.0

43.3

 Heavy (≥10000 EPG)

64 (12.6)

14.2

10.8

1.9

5.2

14.4

14.3

22.8

20.0

23.3

Hookworm

497 (86.6)

88.8

84.4

71.2

87.0

86.4

92.4

86.2

92.9

96.7

GM faecal egg count (range), EPG:

446.5* (24 – 38,880)

492.2

403.6

342.1

393.5

443.9

538.7

381.4

543.1

768.5

Intensity of infection:

          

 Light (1–1999 EPG)

426 (85.7)

84.6

86.9

90.4

86.6

88.9

77.6

96

79.5

75.9

 Moderate (2000–3999 EPG)

33 (6.6)

8.3

4.9

3.8

7.5

3.7

10.6

0.0

15.4

6.9

 Heavy (≥4000 EPG)

38 (7.7)

7.1

8.2

5.8

5.9

7.4

11.8

4.0

5.1

17.2

Trichuris trichiura

189 (32.9)

37.5

28.4

38.4

35.1

29.6

29.4

37.9

33.3

23.3

GM faecal egg count (range), EPG:

189.6* (24 – 10,800)

179.9

202.9

187.9

179.1

221.4

156.3

253.5

128.8

246.2

Intensity of infection:

          

 Light (1–999 EPG)

164 (86.8)

85.9

87.8

92.9

81.5

86.5

88.9

90.9

92.9

71.4

 Moderate (1000–9999 EPG)

24 (12.7)

14.0

10.9

7.1

16.7

13.5

11.1

9.1

7.1

28.6

 Heavy (≥10000 EPG)

1 (0.5)

0

1.2

0

1.8

0

0

0

0

0

Ascaris lumbricoides

56 (9.8)

8.1

11.4

19.2

8.4

9.6

7.6

8.6

4.8

10.0

GM faecal egg count (range), EPG:

2984.5* (96 – 178,080)

3031.2

2952.4

6566.2

6691.1

757.1

4416.9

656.1

1515.4

4321.5

Intensity of infection:

          

 Light (1–4999 EPG)

35 (62.7)

65.2

60.6

42.9

53.8

83.3

57.1

100

50.0

66.7

 Moderate (5000–49999 EPG)

15 (26.8)

21.7

30.3

42.9

23.1

16.7

28.6

0

50.0

33.3

 Heavy (≥50000 EPG)

6 (10.7)

13.0

9.1

14.3

23.1

0

14.3

0

0

0

Taenia sp.

66 (11.5)

11.6

11.4

6.8

5.8

13.6

14.1

15.5

21.4

13.3

  1. GM= geometric mean; EPG= egg per gram of stool; *= mean of parasite egg.