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The Scientific World Journal
Volume 2012 (2012), Article ID 793420, 8 pages
http://dx.doi.org/10.1100/2012/793420
Research Article

Natural Interactions between S. haematobium and S. guineensis in the Republic of Benin

1Université de Perpignan Via Domitia, Ecologie et Evolution des Interactions, UMR 5244, 66860 Perpignan, France
2CNRS, Ecologie et Evolution des Interactions, UMR 5244, 66860 Perpignan, France
3Département de Zoologie et Génétique, Faculté des Sciences et Techniques, Université d’Abomey-Calavi, 01BP526 Cotonou, Benin
4Laboratoire de Parasitologie-Mycologie, Faculté des Sciences de la Santé, Université d’Abomey-Calavi, 01BP188 Cotonou, Benin

Received 6 December 2011; Accepted 4 January 2012

Academic Editor: Ousmane Sarr

Copyright © 2012 Hélène Moné 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.

Abstract

Schistosomiasis is a parasitic disease which affects millions of people around the world, particularly in Africa. In this continent, different species are able to interbreed, like Schistosoma haematobium and Schistosoma guineensis, two schistosome species infecting humans. The Republic of Benin is known to harbor S. haematobium, but its geographical situation in between Nigeria, Mali, and Burkina Faso, where S. guineensis was found, raises the question about the possible presence of S. haematobium/S. guineensis hybrids in this country. We conducted morphological analyses on schistosome eggs and molecular analyses on schistosome larvae (high resolution melting (HRM) analysis and gene sequencing) in order to detect any natural interaction between these two species of schistosomes. The morphological results showed the presence of three egg morphotypes (S. haematobium, S. guineensis, and intermediate). Three genotypes were detected by ITS2 rDNA HRM analysis: S. haematobium, S. guineensis, and hybrid, and their percentages confirmed the results of the morphological analysis. However, sequencing of the CO1 mtDNA gene showed that all the samples from Benin belonged to S. haematobium. Our results provide the first evidence of introgression of S. guineensis genes in S. haematobium in Benin.