The relative contribution of immigration or local increase for persistence of urban schistosomiasis in Salvador, Bahia, Brazil

PLoS Neglected Tropical Diseases
Ronald E BlantonMitermayer G Reis

Abstract

Urbanization is increasing across the globe, and diseases once considered rural can now be found in urban areas due to the migration of populations from rural endemic areas, local transmission within the city, or a combination of factors. We investigated the epidemiologic characteristics of urban immigrants and natives living in a neighborhood of Salvador, Brazil where there is a focus of transmission of Schistosoma mansoni. In a cross-sectional study, all inhabitants from 3 sections of the community were interviewed and examined. In order to determine the degree of parasite differentiation between immigrants and the native born, S. mansoni eggs from stools were genotyped for 15 microsatellite markers. The area received migrants from all over the state, but most infected children had never been outside of the city, and infected snails were present at water contact sites. Other epidemiologic features suggested immigration contributed little to the presence of infection. The intensity and prevalence of infection were the same for immigrants and natives when adjusted for age, and length of immigrant residence in the community was positively associated with prevalence of infection. The population structure of the parasites also sup...Continue Reading

References

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Jul 26, 2011·International Journal for Parasitology·Ronald E BlantonMitermayer G Reis
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Dec 18, 2013·PLoS Neglected Tropical Diseases·Lúcio M BarbosaRonald E Blanton

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Citations

Feb 24, 2017·PLoS Neglected Tropical Diseases·Peter J Hotez
Jan 4, 2018·Parasitology·Maria Teresinha Gomes CasavechiaJorge Juarez Vieira Teixeira
Sep 16, 2017·Disaster Medicine and Public Health Preparedness·Ziling NiFen Yang
Feb 24, 2016·Tropical Diseases, Travel Medicine and Vaccines·Felipe Leão Gomes MurtaMartin Johannes Enk
Apr 4, 2019·Memórias do Instituto Oswaldo Cruz·Vanessa Silva-MoraesPaulo Marcos Zech Coelho
Feb 26, 2021·PLoS Neglected Tropical Diseases·Katharina KloheDavid Rollinson
Jul 22, 2019·Microbiology Spectrum·Ronald E Blanton

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Methods Mentioned

BETA
PCR
genotyping

Software Mentioned

SPADE
Peak Scanner
ArcGIS spatial analyst
SPSS

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