Table 2. Prevalence and infection intensity of S. mansoni infections according to schools.
| School | NUA | POC-CCA test | NSA | KK tests | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| POC-CCA+ (%) | 95% CI a | Mean CCA value (mv) ± SD | 95% CI b | KK+ (%) | 95% CI a | Mean value of EPG ± SD | 95% CI b | |||
| BPB1 | 243 | 139 (57.2) | 48.0–67.5 | 228.3±183 | 225.8–230.8 | 193 | 19 (9.8) | 5.9–15.3 | 256.4±289.7 | 249.2–263.7 |
| BPB2 | 282 | 168 (59.5) | 50.9–69.3 | 239.1±164 | 236.8–241.4 | 227 | 20 (8.8) | 5.3–13.6 | 475.20±782.221 | 465.7–484.8 |
| PSM1 | 257 | 112 (43.5) | 35.8–52.4 | 116±94.2 | 114–118 | 139 | 8 (5.7) | 2.49–11.3 | 108±142.8 | 100.9–115.4 |
| PSM2 | 196 | 94 (47.9) | 38.7–58.7 | 125±11.4 | 122.8–127.3 | 155 | 7 (4.5) | 1.82–9.3 | 44.5±35.1 | 39.7–49.8 |
| PSNn | 218 | 81 (37.1) | 29.5–46.1 | 82.5±44.9 | 80.5–84.5 | 174 | 0 (0)* | 0.0 | 0.0 | 0.0 |
| PSKD | 93 | 32 (34.4) | 23.5–48.5 | 82.6±31.6 | 79.4–85.8 | 80 | 0 (0)* | 0.0 | 0.0 | 0.0 |
| PSKN | 150 | 54 (36) | 27.0–46.9 | 80.4±46.5 | 78–82.8 | 141 | 0 (0)* | 0.0 | 0.0 | 0.0 |
| PSMS | 96 | 54 (56. 2) | 42.2–73.4 | 156.7±142.9 | 153.4–160.1 | 77 | 0 (0)* | 0.0 | 0.0 | 0.0 |
| PSC | 376 | 273 (72. 6) | 64.2–81.7 | 257.4±154.5 | 255.5–259.3 | 274 | 66 (24.1) | 18.6–30.6 | 617.8±1150.9 | 611.8–623.8 |
| PSNp | 342 | 150 (43.8) | 37.1–51.4 | 164.2±143.5 | 162.2–166.3 | 313 | 9 (2.8) | 1.3–5.4 | 50.6±34.8 | 46.1–55.5 |
| Total | 2253 | 1157 (51.3) | 48.4–54.4 | 184.7±153.2 | 183.9–185.5 | 1773 | 129(7.3) | 6.0–8.6 | 440.2±907.8 | 436.5–443.8 |
| P-value | < 0.0001a | < 0.0001b | < 0.0001a | 0.19b | ||||||
| χ 2 | 137.1, df = 9 | - | 165.7, df = 9 | - | ||||||
| F | - | 28.3,df = 9 | - | 1.5, df = 5 | ||||||
BPB1: Government bilingual primary school of Baloua group 1; BPB2: Government bilingual primary school of Baloua group 2; PSM1: Public school of Makenene group 1; PSM2: Public school of Makenene group 2; PSNn: Public school of Nyokon; PSKD: Public school of Kinding Nde; PSKN: Public school of Kinding Ndjabi; PSMS: Public school of Mock-Sud; PSC: Public school of Carrière; PSNp: Public school of Ngokop; NUA: Number of urine samples analysed; NSA: Number of stool samples analysed; POC-CCA+: Number of children positive for POC-CCA test; KK+: Number of children positive for the Kato Katz; CCA: Circulating cathodic antigen; EPG: egg per gram of stool; SD: Standard deviation, a: P-value for chi-square test; b: P- value for ANOVA test; *:The prevalence of parasite species was 0% and the 95% CI could not be calculated; 95% CIa: 95% confidence interval associated to prevalence; it was obtained by dividing, in the MedCalc online software, the number of children positive either for KK or POC-CCA in each school by the total number of children of that school; 95% CIb: 95% confidence interval associated to the mean of infection intensity; it was obtained by dividing, in the MedCalc online software, the sum of EPG or the quantity of CCA in children positive either for KK or POC-CCA in each school by the total number of children who were positive to the corresponding test in that school; df: degree of freedom.