Predicting frequency distribution and influence of sociodemographic and behavioral risk factors of Schistosoma mansoni infection and analysis of co-infection with intestinal parasites

Submitted: 7 January 2015
Accepted: 12 March 2015
Published: 18 May 2015
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Geospatial analysis was used to study the epidemiology of Schistosoma mansoni, intestinal parasites and co-infections in an area (Ilha das Flores) in Sergipe, Brazil. We collected individually georeferenced sociodemographic, behavioral and parasitological data from 500 subjects, analyzed them by conventional statistics, and produced risk maps by Kernel estimation. The prevalence rates found were: S. mansoni (24.0%), Trichuris trichiura (54.8%), Ascaris lumbricoides (49.2%), Hookworm (17.6%) and Entamoeba histolytica (7.0%). Only 59/500 (11.8%) individuals did not present any of these infections, whereas 279/500 (55.8%) were simultaneously infected by three or more parasites. We observed associations between S. mansoni infection and various variables such as male gender, being rice farmer or fisherman, low educational level, low income, water contact and drinking untreated water. The Kernel estimator indicated that high-risk areas coincide with the poorest regions of the villages as well as with the part of the villages without an adequate sewage system. We also noted associations between both A. lumbricoides and hookworm infections with low education and low income. A. lumbricoides infection and T. trichiura infection were both associated with drinking untreated water and residential open-air sewage. These findings call for an integrated approach to effectively control multiple parasitic infections.

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Supporting Agencies

edital MS/CNPq/FAPITEC/SE/SES Nº 06/2007 – PPSUS, n° 19.203- 00775/2007-3. CAPES Edital 032/2010. ARJ and RPA are scientists from the Brazilian Research and Technology Council (CNPq)

How to Cite

Rollemberg, C. V., Silva, M. M., Rollemberg, K. C., Amorim, F. R., Lessa, N. M., Santos, M. D., Souza, A. M., Melo, E. V., Almeida, R. P., Silva, Ângela M., Werneck, G. L., Santos, M. A., Almeida, J. A., & Jesus, A. R. (2015). Predicting frequency distribution and influence of sociodemographic and behavioral risk factors of Schistosoma mansoni infection and analysis of co-infection with intestinal parasites. Geospatial Health, 10(1). https://doi.org/10.4081/gh.2015.303

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