Schistosoma mansoni check for this species in other resources - human and murine isolates - host-parasite relationship - snail - C3H/He mice - Rio de Janeiro - Brazil"/>
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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 98, No. 6, 2003, pp. 783-787
Bioline Code: oc03159
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 98, No. 6, 2003, pp. 783-787

 en A Comparative Parasitologic Study on Biomphalaria glabrata Snail and C3H/He Mice Infected with Human and Murine Isolates of Schistosoma mansoni Derived from Sumidouro, Rio de Janeiro, Brazil
Nilcéa Freire; Rosângela Rodrigues-Silva; José Roberto Machado-Silva & Luís Rey

Abstract

Experiments were carried out to analyze the biological characteristics of two sympatric isolates of Schistosoma mansoni derived from humans and murines in a low endemic transmission area (Sumidouro county, state of Rio de Janeiro, Brazil). Sympatric reared-laboratory Biomphalaria glabrata check for this species in other resources and C3H/He mice were used as experimental hosts. Parameters assessed comprised: precercarial period, infectivity and mortality (snails), prepatent period, infectivity (percentage of cercariae maturation into adult worm) and intestinal egg count (mice). The murine isolate showed a shorter precercarial period and higher infectivity than human isolate (p < 0.05). This biological heterogenicity did not correspond to the vertebrate data because any biological parameter presented significant difference (p > 0.05). These data suggest that both isolates are local sub-populations, providing support for the hypotheses that in a same biotope mixed populations or sub-populations circulate among their main host (human beings) and/or rodent as an anfixenous infection.

Keywords
Schistosoma mansoni check for this species in other resources - human and murine isolates - host-parasite relationship - snail - C3H/He mice - Rio de Janeiro - Brazil

 
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