Table 3.

Prevalence (%) of protozoan parasites by region of origin in the first period (2005–2009), the second (2009–2011), and overall

	Prevalence (95% confidence limits)
	2005–2008		2009–2011		Combined
Blastocystis hominis
Arabian Peninsula	6.1	(4.69–7.72)	2.6	(1.11–5.70)	4.4	(2.93–6.52)
Eastern Mediterranean	4.1	(2.76–6.05)	1.9	(1.07–3.26)	3.0	(2.27–4.00)
Africa	5.4	(4.20–6.81)	4.6	(3.63–5.73)	4.9	(4.16–5.71)
Asia	5.2	(4.46–6.00)	3.4	(2.79–4.03)	4.3	(3.81–4.80)
Qatar	2.8	(2.27–3.44)	1.9	(1.42–2.42)	2.4	(1.98–2.73)
Non-pathogenic amoebae
Arabian Peninsula	2.9	(2.03–4.22)	1.9	(0.71–4.87)	2.5	(1.41–4.19)
Eastern Mediterranean	1.3	(0.61–2.55)	0.7	(0.34–1.76)	1.0	(0.59–1.62)
Africa	5.1	(3.93–6.46)	2.5	(1.78–3.34)	3.6	(2.94–4.27)
Asia	3.3	(2.68–3.92)	1.6	(1.21–2.11)	2.4	(2.07–2.82)
Qatar	1.0	(0.71–1.44)	0.6	(0.34–0.92)	0.8	(0.61–1.06)
Giardia duodenalis
Arabian Peninsula	3.1	(2.19–4.44)	2.2	(0.84–5.16)	2.7	(1.55–4.44)
Eastern Mediterranean	0.7	(0.30–1.73)	0.4	(0.17–1.18)	0.5	(0.25–1.02)
Africa	2.5	(1.75–3.57)	1.4	(0.91–2.10)	1.9	(1.44–2.46)
Asia	2.8	(2.22–3.41)	2.3	(1.85–2.93)	2.6	(2.17–2.94)
Qatar	1.1	(0.74–1.47)	0.6	(0.39–1.00)	0.9	(0.65–1.12)
Amoeba histolytica/dispar
Arabian Peninsula	0	(0–0.38)	0.22	(0.04–2.11)	0.10	(0.04–0.89)
Eastern Mediterranean	0.11	(0.05–0.83)	0.12	(0.06–0.79)	0.12	(0.01–0.43)
Africa	0.54	(0.22–1.11)	0.35	(0.13–0.77)	0.43	(0.23–0.74)
Asia	0.50	(0.28–0.81)	0.40	(0.21–0.68)	0.45	(0.30–0.64)
Qatar	0.09	(0.02–0.26)	0.06	(0.01–0.23)	0.08	(0.03–0.18)