Table 2.
Prevalence % (CL95) of helminth and protozoan parasites by region of origin of the subjects in the study
| western Asia | eastern Asia | northern & Saharan Africa | sub-Saharan Africa | Overall | |
|---|---|---|---|---|---|
| Helminths | |||||
| Ascaris lumbricoides | 1.4 (0.83–2.21) | 2.4 (1.35–4.01) | 1.4 (0.33–5.03) | 1.6 (0.44–5.03) | 1.8 (1.29–2.38) |
| Hookworms | 4.7 (3.62–6.08) | 2.4 (1.35–4.01) | 2.2 (0.66–6.16) | 1.6 (0.44–5.03) | 3.5 (2.84–4.36) |
| Trichuris trichiura | 1.2 (0.71–2.02) | 1.8 (0.97–3.35) | 0.7 (0.10–3.81) | 0.8 (0.12–3.71) | 1.4 (0.98–1.96) |
| Strongyloides stercoralis | 0.5 (0.17–1.01) | 0.5 (0.22–1.55) | 0.0 (0.0–2.58) | 0.0 (0.0–2.30) | 0.4 (0.22–0.79) |
| Taenia spp. | 0.1 (0.0–0.43) | 0.0 (0.0–0.70) | 0.7 (0.10–3.81) | 0.0 (0.0–2.30) | 0.1 (0.01–0.29) |
| Hymenolepis nana | 0.5 (0.17–1.01) | 0.2 (0.09–1.04) | 0.7 (0.10–3.81) | 0.8 (0.12–3.71) | 0.4 (0.19–0.74) |
| Enterobius vernicularis | 0.2 (0.02–0.56) | 0.1 (0.04–0.87) | 0.0 (0.0–2.58) | 0.0 (0.0–2.30) | 0.1 (0.02–0.35) |
| All helminths combined | 7.3 (5.89–8.92) | 7.2 (5.21–9.66) | 5.8 (2.98–10.78) | 4.9 (2.43–9.33) | 7.0 (6.03–8.05) |
| Protozoa | |||||
| Blastocystis hominis | 5.7 (4.44–7.12) | 4.7 (3.19–6.82) | 10.9 (6.59–17.03) | 4.1 (1.81–8.26) | 5.5 (4.61–6.41) |
| Chilomastix mesnili | 0.1 (0.0–0.43) | 0.0 (0.0–0.70) | 1.4 (0.33–5.03) | 0.0 (0.0–2.30) | 0.1 (0.02–0.35) |
| Endolimax nana | 3.2 (2.28–4.32) | 2.1 (1.20–3.75) | 4.3 (1.94–8.97) | 8.9 (5.39–14.42) | 3.1 (2.48–3.92) |
| Entamoeba coli | 2.2 (1.51–3.23) | 1.3 (0.61–2.65) | 8.7 (5.03–14.50) | 1.6 (0.44–5.03) | 2.2 (1.67–2.88) |
| Entamoeba hartmanni | 0.5 (0.22–1.12) | 0.3 (0.13–1.21) | 0.7 (0.10–3.81) | 0.0 (0.0–2.30) | 0.4 (0.22–0.79) |
| Entamoeba histolytica/dispar | 1.1 (0.59–1.82) | 0.6 (0.27–1.72) | 1.4 (0.33–5.03) | 0.8 (0.12–3.71) | 0.9 (0.59–1.39) |
| Giardia duodenalis | 3.6 (2.61–4.76) | 1.1 (0.46–2.37) | 1.4 (0.33–5.03) | 0.0 (0 − 2.30) | 2.3 (1.77–3.02) |
| Iodamoeba butschlii | 0.2 (0.05–0.68) | 0.3 (0.13–1.21) | 0.0 (0.0–2.58) | 0.8 (0.12–3.71) | 0.3 (0.11–0.58) |
| All protozoa combined | 12.7 (10.90–14.54) | 8.5 (6.44–11.25) | 21.7 (15.75–29.12) | 13.0 (8.56–19.02) | 11.7 (10.4–12.93) |
| Helminths and protozoa combined | 19.2 (17.01–21.31) | 14.6 (11.85–17.88) | 26.8 (20.15–34.54) | 17.1 (11.90–23.70) | 17.8 (16.28–19.28) |
The highest regional prevalence for each species is in bold