Table of Contents
ISRN Parasitology
Volume 2013, Article ID 715195, 4 pages
Clinical Study

Prevalence and Morbidity Data on Schistosoma mansoni Infection in Two Rural Areas of Jequitinhonha and Rio Doce Valleys in Minas Gerais, Brazil

1Department of Preventive Medicine, Infectious and Parasitic Diseases Post-Graduation, Clementino Fraga Filho Hospital, Universidade Federal do Rio de Janeiro (UFRJ), 21045-900 Rio de Janeiro, RJ, Brazil
2Laboratory of Parasitic Diseases, Instituto Oswaldo Cruz, Fiocruz, Manguinhos, 21045-900 Rio de Janeiro, RJ, Brazil
3Tropical Medicine Post-Graduation, Fiocruz, 21045-900 Rio de Janeiro, RJ, Brazil
4University of the State of Amazonas (UEA), 69077-000, Manaus, AM, Brazil

Received 15 December 2012; Accepted 13 January 2013

Academic Editors: C. Araujo, G. Lochnit, and J. Venegas Hermosilla

Copyright © 2013 Maria José Conceição et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Objective. This study aimed to compare the prevalence and morbidity data on Schistosoma mansoni infection in two rural areas: the Jequitinhonha valley (area 1) and the Rio Doce valley (area 2) in the state of Minas Gerais, Brazil, covering the period from 2007 to 2010. Material and Methods. The parasitological stool tests were based on the quantitative method of Kato modified by Katz et al. Three clinical forms were considered: type I—schistosomiasis infection, type II—hepatointestinal form, and type III—hepatosplenic form. Results. The prevalence of infection among inhabitants of area 1 was 22.9%, with 2.1% presenting the hepatosplenic form and two cases of schistosomal myeloradiculopathy. The infection prevalence rate in area 2 was 20.2%, with 3.3% presenting the hepatosplenic form. Conclusion and Recommendation. There was no difference in the prevalence and in the morbidity of Schistosoma mansoni infection between the two areas, but it was predominant in young men with a low intensity of infection. The cases of schistosomal myeloradiculopathy in area 1 can be highlighted: these emphasize that schistosomiasis should not be neglected in Brazil. The lack of infection control in both areas may be related to the poor sanitation system, the absence of previous treatment, and the reinfection process.