highly significantp < 0.001
Region of origin of subjects In all four taxa and when combined, there was a highly significant effect of REGION (Table 2 ; all four taxa combined, χ 2 4 = 216.6, p < 0.001; B. hominis, χ 2 4 = 67.1, p < 0.001; G. duodenalis, χ 2 4 = 103.4, p < 0.001; non-pathogenic amoebae, χ 2 4 = 105.1, p < 0.001; E. histolytica/dispar, χ 2 4 = 23.2, p < 0.001).