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Table 1 Prevalence (%) of protozoan parasites in the study population in the first (2005–2008), second (2009–2011), third (2012–2014) periods and overall

From: A decade of intestinal protozoan epidemiology among settled immigrants in Qatar

  Prevalence (95 % confidence limits)
  Period 1 Period 2 Period 3 Combined ***
  2005–2008 2009–2011 2012–2014  
Protozoa*
Blastocystis hominis 4.32 (3.907–4.738) 2.78 (2.439–3.124) 3.26 (2.930–3.586) 3.45 (3.240–3.658)
Giardia duodenalis 1.94 (1.662–2.226) 1.44 (1.188–1.684) 1.10 (0.911–1.297) 1.47 (1.331–1.606)
Chilomastix mesnili Nd 0.05 (0.012–0.116) 0.03 (0.006–0.078) 0.03 (0.014–0.072)
Entamoeba coli Nd 0.50 (0.361–0.668) 0.45 (0.338–0.597) 0.47 (0.383–0.578)
Entamoeba hartmanni Nd 0.03 (0.007–0.099) 0.02 (0.002–0.064) 0.02 (0.008–0.058)
Endolimax nana Nd 0.88 (0.697–1.101) 0.53 (0.400–0.677) 0.68 (0.568–0.796)
Iodamoeba buetschlii Nd 0.15 (0.078–0.251) 0.13 (0.075–0.220) 0.14 (0.093–0.202)
 All Non pathogenic amoebae** 2.52 (2.199–2.840) 1.38 (1.136–1.623) 0.95 (0.773–1.132) 1.57 (1.432–1.717)
Entamoeba histolytica/dispar** 0.29 (0.193–0.427) 0.23 (0.138–0.349) 0.12 (0.068–0.209) 0.21 (0.159–0.268)
Cryptosporidium sp. Nd 0.05 (0.012–0.116) 0.06 (0.025–0.128) 0.05 (0.027–0.098)
 All protozoa combined 7.98 (7.429–8.536) 5.13 (4.673–5.593) 4.89 (4.488–5.286) 5.93 (5.664–6.205)
  1. *In addition to the species listd above there was one case of Isopora sp. identified in a 57 year-old male Sudanese subject
  2. ** Non-pathogenic amoebae are E. coli, E. hartmanni, E. nana and I. buetschlii
  3. Pathogenic amoebae E. histolytica/dispar which cannot be distinguished on cyst morphology. See text for further explanation
  4. Nd not done, these species were not assessed independently in Period 1
  5. ***Overall prevalence across Periods 1, 2 and 3 combined or Periods 2 and 3 combined when relevant data for Period 1 were not available