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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 101, No. s1, 2006, pp. 233-234
Bioline Code: oc06193
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 101, No. s1, 2006, pp. 233-234

 en Intermediate and definitive hosts of Schistosoma mansoni in Corrientes province, Argentina
C Edgardo Borda & María JF Rea

Abstract

Corrientes province is located in the humid subtropical region of Argentina northeast on the left riverbank of Paraná River in the border with the South of Brazil. This is a region without schistosomiasis but planorbid and rodents that would serve as host of the life cycle of Schistosoma mansoni check for this species in other resources inhabit here. The objective of this work is to know the role of rodent as definitive host of schistosomiasis.
Biomphalaria tenagophila check for this species in other resources (4 to 8 mm Ø) from Maloyas, exposed each to 10 miracidia of SJ2 strain of S. mansoni natives from Brazil were susceptible (5%). The degree of compatibility was Class II of Frandsen. Five wild rodents captured in the same ecological niche were exposed transcutaneously to infection with 40 cercariae for animal: two Olygoryzomys flavescens check for this species in other resources , two Holochilus braziliensis check for this species in other resources , and one Scapteromys tuncidus. Only one H. braziliensis eliminated eggs in feces. Prepatent period was of 83 days. With these feces, two of six (33.3%) B. tenagophila from Maloyas were infected with miracidium.
It was demonstrated, in an area free of schistosomiasis, that life cycle S. mansoni is closed with planorbid and rodents that live in the same ecological niche.

Keywords
Schistosoma mansoni - hosts - Argentina

 
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