{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,4]],"date-time":"2026-04-04T12:12:37Z","timestamp":1775304757940,"version":"3.50.1"},"reference-count":16,"publisher":"FapUNIFESP (SciELO)","issue":"3","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Rev. Soc. Bras. Med. Trop."],"published-print":{"date-parts":[[1993,9]]},"abstract":"<jats:p>Prevalence of infection with the intestinal helminths, Ascaris lumbricoides, Trichuris trichiura, Ancylostoma duodenale and Strongyloides stercoralis was examinedin 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 amerindians, and mixed-race mestizos. Greater prevalences of infection were seen in the area oflower socioeconomic status. No racial or blood group associations with helminth infection were seen controlling for socioeconomic status.<\/jats:p>","DOI":"10.1590\/s0037-86821993000300007","type":"journal-article","created":{"date-parts":[[2013,4,13]],"date-time":"2013-04-13T14:23:27Z","timestamp":1365863007000},"page":"175-180","source":"Crossref","is-referenced-by-count":17,"title":["Intestinal helminthiases in Ecuador: the relat\u00edonship between prevalence, genetic, and socioeconomic factors"],"prefix":"10.1590","volume":"26","author":[{"given":"Philip J.","family":"Cooper","sequence":"first","affiliation":[]},{"given":"Angel Guevara","family":"E.","sequence":"additional","affiliation":[]},{"given":"Ronald H.","family":"Guderian","sequence":"additional","affiliation":[]}],"member":"530","reference":[{"key":"ref1","first-page":"808","article-title":"Blood groups and giardiasis","volume":"1","author":"Bames GL","year":"1977","journal-title":"Lancet","ISSN":"https:\/\/id.crossref.org\/issn\/0099-5355","issn-type":"print"},{"key":"ref2","series-title":"Basic Clinical Parasitology","first-page":"122","author":"Brown HW","year":"1983","edition":"5"},{"key":"ref3","doi-asserted-by":"crossref","first-page":"405","DOI":"10.1098\/rstb.1988.0100","article-title":"Population ecology of intestinal helminth infections in human communities","volume":"321","author":"Bundy D AP","year":"1988","journal-title":"Philosophical Transactions of the Royal Society of London","ISSN":"https:\/\/id.crossref.org\/issn\/0080-4622","issn-type":"print"},{"key":"ref4","doi-asserted-by":"crossref","first-page":"770","DOI":"10.1093\/infdis\/159.4.770","article-title":"ABO blood group and cholera: new observations on specificity of risk and modification of vaccine efficacy","volume":"159","author":"Clemens JD","year":"1989","journal-title":"Journal of Infectious Diseases","ISSN":"https:\/\/id.crossref.org\/issn\/0022-1899","issn-type":"print"},{"key":"ref5","first-page":"31","article-title":"Studies on oxyuriasis. 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