Table 2.

Prevalence (%) of protozoan and helminth parasites in the study population in the first period (2005–2008), the second (2009–2011), and overall

	Prevalence (95% confidence limits)
	2005–2008		2009–2011		Combined
Protozoa
Blastocystis hominis	4.3	(3.91–4.74)	2.9	(2.60–3.28)	3.6	(3.36–3.89)
Giardia duodenalis	1.9	(1.66–2.23)	1.4	(1.19–1.67)	1.7	(1.50–1.87)
Chilomastix mesnili	Nd		0.04	(0.012–0.109)	Na
Entamoeba coli	Nd		0.51	(0.38–0.68)	Na
Entamoeba hartmanni	Nd		0.03	(0.007–0.094)	Na
Endolimax nana	Nd		0.86	(0.678–1.064)	Na
Iodamoeba buetschlii	Nd		0.16	(0.090–0.264)	Na
All Non pathogenic amoebae*	2.5	(2.20–2.84)	1.4	(1.13–1.60)	1.9	(1.74–2.14)
Pathogenic amoeba*	0.29	(0.193–0.427)	0.25	(0.156–0.369)	0.27	(0.200–0.355)
All protozoa combined	8.0	(7.43–8.54)	5.3	(4.82–5.72)	6.6	(6.26–6.97)
Helminths
Hookworms	2.1	(1.76–2.34)	1.3	(1.08–1.55)	1.7	(1.50–1.87)
Trichuris trichiura	0.5	(0.36–0.65)	0.4	(0.29–0.56)	0.4	(0.36–0.55)
Ascaris lumbricoides	0.3	(0.23–0.48)	0.2	(0.11–0.29)	0.3	(0.19–0.34)
Hymenolepis nana†	0.1	(0.04–0.19)	0.2	(0.12–0.32)	0.2	(0.10–0.22)
All helminths combined	2.6	(2.30–2.95)	1.9	(1.67–2.23)	2.3	(2.07–2.50)
All the above species combined	10.2	(9.62–10.8)	6.9	(6.43–7.46)	8.6	(8.18–8.98)

^*Non-pathogenic amoebae are E. coli, E. hartmanni, E. nana, and I. buetschlii.

Pathogenic amoebae E. histolytica/dispar, which cannot be distinguished on cyst morphology. See text for further explanation

^†This species is also known as Rodentolepis nana.

Nd = not done, these species were not assessed independently in the first period; Na = not applicable.