Nectomys squamipes check for this species in other resources - Schistosoma mansoni check for this species in other resources - daily activity pattern - host reservoir"/>
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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 97, No. s1, 2002, pp. 11-14
Bioline Code: oc02178
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 97, No. s1, 2002, pp. 11-14

 en Experimental Evidence and Ecological Perspectives for the Adaptation of Schistosoma mansoni check for this species in other resources Sambon, 1907 (Digenea: Schistosomatidae) to a Wild Host, the Water-rat, Nectomys squamipes check for this species in other resources Brants, 1827 (Rodentia: Sigmodontinae)
Paulo Sérgio D'Andrea; Fabiano Araujo Fernandes; Rui Cerqueira & Luis Rey

Abstract

Due to the semi aquatic habits and the overlap of the geographical distribution of the water-rat, Nectomys check for this species in other resources spp., with schistosomiasis endemic areas, these wild rodents are very likely to acquire Schistosoma mansoni check for this species in other resources infection in their daily activities. The role of the water-rat in the S. mansoni cycle would be substantiated if one could prove that these rodents acquire the parasite during their own activity time, a completely independent time schedule of human activities. To pursue this goal, we performed two field experiments in the municipality of Sumidouro, State of Rio de Janeiro, Brazil, a schistosomiasis endemic area where N. squamipes check for this species in other resources is found naturally infected. One experiment was devised as a series of observations of activity time of the water-rat. The other experiment was a test of the occurrence of late transmission of S. mansoni to the water-rat. The daily activity pattern showed that the water-rat is active chiefly just after sunset. At both diurnal and late exposition essays the water-rat sentinels got infected by S. mansoni . These findings clarify ecological and behavioral components necessary to the adaptation of S. mansoni to the water-rat as a non human definitive host and the existence of a transmission cycle involving this animals as a reservoir.

Keywords
Nectomys squamipes check for this species in other resources - Schistosoma mansoni check for this species in other resources - daily activity pattern - host reservoir

 
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