tokens: In addition , people residing in houses with more than four inhabitants showed significantly higher positivity for infections with G. duodenalis and with E. histolytica / E. dispar ( 22/138 ( 15.9 % ) vs. 16/311 ( 5.1 % ) ; PR = 3.09 ; 95 % CI = 1.68 - 5.71 ; p < 0.001 for G. duodenalis and 32/138 ( 23.2 % ) vs. 30/311 ( 9.6 % ) ; PR = 2.40 ; 95 % CI = 1.52 - 3.79 ; p < 0.001 for E. histolytica / E. dispar ) .