Table 3.

Prevalence of schistosomiasis and STH infections and distribution of causative by organisms in Nigerian children

Organism	2013 Prevalence estimate (95% CI)	2018 Prevalence estimate (95% CI)
Among all children
Schistosomiasis	12.9% (11.1–14.9%)	9.0% (7.4–10.9%)
Only Schistosoma hematobium	8.4% (6.8–10.2%)	4.7% (3.7–6.0%)
Only Schistosoma mansoni	4.7% (3.7–5.9%)	4.1% (2.9–5.6%)
Both schistosomiasis species	0.3% (0.2–0.6%)	0.2% (0.1–0.4%)
Soil-transmitted helminths
Only Ascaris lumbricoides	1.3% (1.0–1.6%)	0.9% (0.7–1.3%)
Only hookworm	10.0% (8.5–11.8%)	8.5% (7.1–10.2%)
Only Trichuris trichiura	0.1% (0.0–0.2%)	0.1% (0.0–0.2%)
More than one organism	0.2% (0.1–0.3%)	0.2% (0.1–0.4%)
Causative organisms
Schistosomiasis infections	N = 1,461	N = 873
Only S. hematobium	62.6% (54.9–69.8%)	52.3% (42.3–62.2%)
Only S. mansoni	35.0% (28.0–42.6%)	45.0% (35.2–55.3%)
Both schistosomiasis species	2.4% (1.4–4.2%)	2.6% (1.6–4.2%)
STH infections	N = 1,225	N = 904
Only A. lumbricoides	11.7% (9.3–14.6%)	10.5% (7.6–14.3%)
Only Hookworm	89.2% (86.2–91.6%)	91.0% (87.8–93.5%)
Only T. trichiura	0.8% (0.4–1.5%)	1.3% (0.7–2.6%)
More than one organism	1.7% (1.1–2.7%)	2.5% (1.6–4.1%)

CI = confidence interval.