2018
DOI: 10.1371/journal.pone.0195519
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Socioenvironmental factors associated with Schistosoma mansoni infection and intermediate hosts in an urban area of northeastern Brazil

Abstract: Schistosomiasis, which is caused by trematodes of the genus Schistosoma and by the species Schistosoma mansoni in Brazil, is transmitted primarily by Biomphalaria glabrata mollusks. Infections occur in humans and mollusks in freshwater environments contaminated with feces from infected humans. This study aimed to evaluate potential foci of schistosomiasis based on the identification of infection sites for the snails, factors that increased the human infection probability of S. mansoni infection, and the relati… Show more

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Cited by 25 publications
(27 citation statements)
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References 29 publications
(33 reference statements)
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“…The overall pooled prevalence of schistosome cercaria was nearly 6% among freshwater snails in Africa. This finding is slightly lower than 9% reported from freshwater snails in Brazil [ 75 ]. In contrast, a lower prevalence of infected snails was observed from Indonesia [ 76 ] and Brazil [ 77 ].…”
Section: Discussioncontrasting
confidence: 69%
“…The overall pooled prevalence of schistosome cercaria was nearly 6% among freshwater snails in Africa. This finding is slightly lower than 9% reported from freshwater snails in Brazil [ 75 ]. In contrast, a lower prevalence of infected snails was observed from Indonesia [ 76 ] and Brazil [ 77 ].…”
Section: Discussioncontrasting
confidence: 69%
“…Overall, certain factors were found to be significantly associated with a lower or higher risk of infection in urban areas: Distance from the individuals home to a freshwater access point in which disease-relevant mollusc species were present [ 5 ], abstaining from or swimming in open freshwater bodies [ 28 , 35 37 ], as well as the profession of the parents, and socioeconomic status [ 38 – 40 ].…”
Section: Resultsmentioning
confidence: 99%
“…Prevalence and transmission of the different types of schistosomiasis are typically associated with poor environmental and sanitary conditions, thus usually affecting people living in unfavorable socioeconomic conditions [ 5 , 6 ]. Due to environmental degradation and climate change, leading to warmer, tropical temperatures, and shifting rainfall patterns, there may be a change and even increase in the geographic and periodic distribution of Schistosoma spp.…”
Section: Introductionmentioning
confidence: 99%
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“…Specific programs are required in each affected area for its control and elimination. 50 In addition, longterm screening for subclinical infestations is required, considering severe forms of the disease are not as prevalent as they once were. Finally, there is a high frequency of noncommunicable diseases such as hypertension, overweight, and obesity in a poor population, indicating the need for interventions to promote dietary knowledge, attitudinal, behavioral, and nutritional changes in people.…”
Section: Resultsmentioning
confidence: 99%