| 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 |
| risk factors for atopic and non-atopic asthma in a rural area of ecuador. | background asthma has emerged as an important public health problem of urban populations in latin america. epidemiological data suggest that a minority of asthma cases in latin america may be associated with allergic sensitisation and that other mechanisms causing asthma have been overlooked. the aim of the present study was to investigate risk factors for atopic and non-atopic asthma in school-age children. methods a cross-sectional study was conducted among 3960 children aged 6-16 years living ... | 2010 | 20435862 |