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Table 1 Prevalence and intensity of S. haematobium in first-year students (aged 5–8 years), 9–12-year-olds, 13–14-year-olds, and adults (aged 20–55 years) at baseline of a SCORE study in northern Mozambique

From: Urogenital schistosomiasis in Cabo Delgado, northern Mozambique: baseline findings from the SCORE study

Age group (years)

No. of individuals examined

No. of individuals infected (%)a

Intensity of S. haematobium infection

Arithmetic mean intensity (eggs/10 ml)b

No. of heavily infected individuals (%)

Both sexes

 5–8

7463

4709 (63.1)

58.2

1440 (33.8)

 9–12

7317

4873 (66.6)

71.9

1633 (33.9)

 13–14c

5429

4010 (73.9)

  

 20–55

4259

1910 (44.8)

23.9

300 (15.8)

 Totald

19,039

11,492 (60.4)

55.8

3373 (17.7)

Females

 5–8

3196

1922 (60.1)

44.7

517 (27.1)

 9–12

3013

1890 (62.7)

54.4

547 (29.0)

 13–14c

2276

1666 (73.2)

  

 20–55

1329

560 (42.1)

22.0

88 (15.9)

 Totald

7538

4372 (58.0)

44.6

1152 (23.8)

Males

 5–8

4261

2784 (65.3)

68.1

923 (33.2)

 9–12

4239

2946 (69.5)

84.9

1086 (37.1)

 13–14c

3153

2344 (74.3)

  

 20–55

2924

1349 (46.1)

24.8

212 (15.8)

 Totald

11,424

7079 (62.0)

63.12

2221 (26.7)

  1. aFor sexes combined, there was a significant difference in prevalence between age groups (P < 0.001) with the following sequence: 9–12 > 5–8 > 20–55 years (χ2 test). Within every age group, males had higher prevalence of infection than females in 5–8, 9–12 and 20–55 years (P < 0.001, P < 0.001, P < 0.01, respectively)
  2. bFor sexes combined, there was no difference between the two groups of children (age group 5–8 and 9–12 years), but intensity of infection among children was significantly higher (P < 0.001) than adults (one-way ANOVA). There was no difference between genders among school children, but male adults had higher intensities than females (P < 0.02)
  3. cEligibility results: prevalence of haematuria by dipstick from a single urine sample from children aged 13–14 years
  4. dTotal only includes the microscopic urine filtration data from the cross-sectional analysis, and excludes eligibility data that was collected in 13–14 year-olds using reagent strips only