Acta Parasitologica

, Volume 64, Issue 4, pp 932–937 | Cite as

Spatial and Seasonal Distribution of Holochilus sciureus with Schistosoma mansoni Infection in an Endemic Area for Schistosomiasis in Brazil

  • Carla Fernanda do Carmo-Silva
  • Andrea Teles-Reis
  • Raynara Fernanda Silva-Soares
  • João Gustavo Mendes Rodrigues
  • Maria Gabriela Sampaio Lira
  • Ranielly Araújo Nogueira
  • Davi Viegas-Melo
  • Diogo Tavares Cardoso
  • Guilherme Silva MirandaEmail author
  • Nêuton Silva-Souza
Short Communication



The occurrence of wild rodents in the Schistosoma mansoni life cycle may increase the transmission of schistosomiasis and understanding the spatial and seasonal distribution of the natural infection of these reservoirs is essential for the development of more effective control strategies.

Material and methods

In this study, Holochilus sciureus rodents were captured from the flooded fields of São Bento city (an endemic area for schistosomiasis in Northeast Brazil), during the dry and rainy seasons. All these sites were georeferenced and the prevalence of S. mansoni was verified by the presence of adult worms in the mesenteric branches and livers of each animal.


It was demonstrated that almost half of the animals collected were naturally infected with S. mansoni (45.45%) and this infection was not related to the distance from urban areas. Furthermore, the temperature, precipitation, sex, and weight did not interfere with the H. sciureus infection rates. Interestingly, we found, for the first time, the natural infection of H. sciureus in another endemic city of S. mansoni in Northeast Brazil.


Therefore, the H. sciureus rodent shows a high natural infection rate for S. mansoni in the flooded fields of São Bento, regardless of the weather station, capture distance, and biological aspects. Additionally, we have demonstrated that H. sciureus naturally parasitized with S. mansoni may inhabit a much more extensive area that is currently described in the literature.


Reservoir Rodents Schistosomiasis 



We thank the Fundação de Amparo à Pesquisa e ao Desenvolvimento Científico e Tecnológico do Maranhão – FAPEMA for financial support.

Author contributions

NSS conceived the idea. CFCS, ATR, RFSS, JGMR, MGSL, RAN, DVM, GSM, and NSS performed the laboratory experiments and field collections. CFCS, JGMR, DTC, and GSM designed and analyzed the data. DTC created the maps and designed the figures. GSM and NSS supervised the overall project. CFCS, GSM, and NSS wrote the manuscript with suggestions from all the other co-authors.


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Copyright information

© Witold Stefański Institute of Parasitology, Polish Academy of Sciences 2019

Authors and Affiliations

  • Carla Fernanda do Carmo-Silva
    • 1
  • Andrea Teles-Reis
    • 1
  • Raynara Fernanda Silva-Soares
    • 1
  • João Gustavo Mendes Rodrigues
    • 2
  • Maria Gabriela Sampaio Lira
    • 1
  • Ranielly Araújo Nogueira
    • 1
  • Davi Viegas-Melo
    • 1
  • Diogo Tavares Cardoso
    • 3
  • Guilherme Silva Miranda
    • 3
    • 4
    Email author
  • Nêuton Silva-Souza
    • 1
  1. 1.Department of Chemistry and Biology, Laboratory of Human ParasitologyState University of MaranhãoSão LuísBrazil
  2. 2.Department of Pathology, Laboratory of ImmunophysiologyFederal University of MaranhãoSão LuísBrazil
  3. 3.Department of Parasitology, Institute of Biological SciencesFederal University of Minas GeraisBelo HorizonteBrazil
  4. 4.Department of EducationFederal Institute of Education, Science and Technology of MaranhãoSão Raimundo das MangabeirasBrazil

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