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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