{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,24]],"date-time":"2026-08-24T18:17:00Z","timestamp":1787595420449,"version":"build-2736575974"},"reference-count":32,"publisher":"American Society of Tropical Medicine and Hygiene","issue":"5","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2012,11,7]]},"abstract":"<jats:p>Rapid urbanization in Brazil has meant that many persons from rural areas where <jats:italic>Schistosoma mansoni<\/jats:italic> is endemic have migrated to cities. Discovery of a focus of active transmission in the city of Salvador prompted a citywide survey for active and potential transmission sites. Cercariae shed from infected snails collected from four locations were used to determine how these samples were related and if they were representative of the parasite population infecting humans. Each cercarial collection was greatly differentiated from the others, and diversity was significantly lower when compared with eggs from natural human infections in one site. Egg samples collected 7 years apart in one neighborhood showed little differentiation (Jost's D = 0.01\u20130.03). Given the clonal nature of parasite reproduction in the snail host and the short-term acquisition of parasites, cercariae from collections at one time point are unlikely to be representative of the diversity in the human population.<\/jats:p>","DOI":"10.4269\/ajtmh.2012.11-0641","type":"journal-article","created":{"date-parts":[[2012,9,21]],"date-time":"2012-09-21T15:15:22Z","timestamp":1348240522000},"page":"843-849","source":"Crossref","is-referenced-by-count":6,"title":["Genetic Population Structure of Cercariae from an Urban Foci of Schistosoma mansoni, Brazil"],"prefix":"10.4269","volume":"87","author":[{"given":"Samaly S.","family":"Souza","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"L\u00facio M.","family":"Barbosa","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Isabel C.","family":"Guimar\u00e3es","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Walter A.","family":"Blank","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Renato Barbosa","family":"Reis","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mitermayer G.","family":"Reis","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ronald E.","family":"Blanton","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zilton A.","family":"Andrade","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"2795","reference":[{"issue":"(Suppl 1)","key":"R1","series-title":"Mem Inst Oswaldo Cruz","first-page":"33","article-title":"Schistosomiasis control in Brazil","volume":"93","author":"Katz","year":"1998"},{"key":"R2","series-title":"Eur J Clin Nutr","first-page":"1022","article-title":"Childhood stunting in northeast Brazil: the role of Schistosoma mansoni infection and inadequate dietary intake","volume":"58","author":"Assis","year":"2004"},{"key":"R3","series-title":"Am J Trop Med Hyg","first-page":"939","article-title":"Moderate- and low-intensity co-infections by intestinal helminths and Schistosoma mansoni, dietary iron intake, and anemia in Brazilian children","volume":"75","author":"Brito","year":"2006"},{"issue":"(Suppl)","key":"R4","series-title":"Parasitology","first-page":"S107","article-title":"The impact of schistosomiasis on human nutrition","volume":"107","author":"Stephenson","year":"1993"},{"key":"R5","series-title":"Vigil\u00e2ncia e Controle de Moluscos de Import\u00e2ncia Epidemiol\u00f3gica: Diretrizes T\u00e9cnicas: Programa de Vigil\u00e2ncia e Controle da Esquistossomose (PCE)","author":"Minist\u00e9rio da Sa\u00fade","year":"2007"},{"key":"R6","series-title":"Rev Soc Bras Med Trop","first-page":"451","article-title":"Urban transmission of schistosomiasis in children from a neighborhood of Salvador, Bahia [in Portuguese]","volume":"39","author":"Guimaraes","year":"2006"},{"key":"R7","series-title":"Exp Parasitol","first-page":"137","article-title":"Differences in susceptibility of Brazilian strains of Australorbis glabratus to Schistosoma mansoni","volume":"9","author":"Barbosa","year":"1960"},{"key":"R8","series-title":"Mem Inst Oswaldo Cruz","first-page":"549","article-title":"Current epidemiological status of schistosomiasis in the state of Pernambuco, Brazil","volume":"105","author":"Barbosa","year":"2010"},{"key":"R9","series-title":"Cad Saude Publica","first-page":"415","article-title":"Schistosomiasis mansoni in urban territory. 2. 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