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Occurrence of Biomphalaria cousini (Mollusca: Gastropoda) in Brazil and its susceptibility to Schistosoma mansoni (Platyhelminths: Trematoda)

By Tatiana Maria Teodoro, Liana Konovalloff Janotti Passos, Omar dos Santos Carvalho and Roberta Lima Caldeira


In Brazil, there are three intermediate snail vectors and two potential hosts of Schistosoma mansoni. Pre-vious studies showed three variant molecular profiles to B. Amaz??nica and evidenced intraspecific varia-tions using sequence data. In this context, the aim of this study was to verify whether such differences would correspond to either B. amaz??nica or B. cousini. The snails were morphologically identified; PCR???RFLP and sequencing were carried out. Besides, B. cousini were submitted to susceptibility experi-ments to S. mansoni. Noteworthy, morphological data of Brazilian specimens predominantly showed the morphology described for B. amazonica. Nevertheless, PCR???RFLP results exhibited three variant molecular profiles for the specimens previously identified as B. Amaz??nica and the phylogenetic analyses showed two groups one to B. amaz??nica and another to B. cousini. Furthermore, B. cousini showed to be susceptible to S. mansoni. These results confirm the occurrence of B. cousiniin Brazil and points to the risk of introduction of schistosomiasis mansoni into new ??rea

Topics: Biomphalaria cousini, Schistosoma mansoni, Susceptibility and phylogeny
Publisher: Elsevier Inc.
Year: 2010
OAI identifier: oai:agregador.ibict.br.RI_FIOCRUZ:oai:localhost:icict/7081
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