highly significantP < 0.001
Region of origin of subjects In all four species and when combined, there was a highly significant effect of REGION (Table 2 ; all four species combined, χ 2 4 = 432.4, P < 0.001; hookworms χ 2 4 = 666.3, P < 0.001; T. trichiura χ 2 4 = 108.5, P < 0.001; A. lumbricoides χ 2 4 = 88.8, P < 0.001; H. nana χ 2 4 = 39.7, P < 0.001).