| intestinal helminthiases in ecuador: the relationship between prevalence, genetic, and socioeconomic factors. | prevalence of infection with the intestinal helminths, ascaris lumbricoides, trichuris trichiura, ancylostoma duodenale and strongyloides stercoralis was examined in 632 residents of communities in esmeraldas province of ecuador. these communities were divided into two groups according to area of habitation which reflected different socioeconomic circumstances. attempts were made to correlate infection status with race and abo blood group phenotype. the racial groups included blacks, chachi amer ... | 1993 | 8146392 |
| impact of long-term treatment with ivermectin on the prevalence and intensity of soil-transmitted helminth infections. | control of soil-transmitted helminth (sth) infections relies on the periodic and long-term administration of anthelmintic drugs to high-risk groups, particularly school-age children living in endemic areas. there is limited data on the effectiveness of long-term periodic anthelmintic treatment on the prevalence of sths, particularly from operational programmes. the current study investigated the impact of 15 to 17 years of treatment with the broad-spectrum anthelmintic ivermectin, used for the c ... | 2008 | 18820741 |