Susceptibility of Biomphalaria glabrata submitted to concomitant infection with Angiostrongylus costaricensis and Schistosoma mansoni.
The easy adaptation of Angiostrongylus costaricensis, nematode responsible for abdominal angiostrongyliasis to several species of terrestrial and freshwater molluscs and the differences observed in the interactions of trematodes with their intermediate hosts have induced us to study the concomitant infection of Biomphalaria glabrata with Schistosoma mansoni and A. costaricensis. Prior exposure of B. glabrata to A. costaricensis (with an interval of 48 hours), favored the development of S. mansoni, observing higher infection rate, increased release of cercariae and increased survival of molluscs, when compared to molluscs exposed only to S. mansoni. Prior exposure of B. glabrata to A. costaricensis and then to S. mansoni also enabled the development of A. costaricensis since in the ninth week of infection, higher amount of A. costaricensis L3 larvae was recovered (12 larvae / mollusc) while for molluscs exposed only to A. costaricensis, the number of larvae recovered was lower (8 larvae / mollusc). However, pre-exposure of B. glabrata to S. mansoni (with an interval of 24 hours), and subsequently exposure to A. costaricensis proved to be very harmful to B. glabrata, causing extensive mortality of molluscs, reduced pre-patent period to release cercariae and greater recovery of L3 A. costaricensis larvae.
Department of Animal Biology, Institute of Biology, State University of Campinas - UNICAMP, Cidade Universitária, Barão Geraldo, CP 6109, CEP 13083-970, Campinas, SP, Brazil.
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Guerino
Statistika Consultoria, Rua Barão de Jaguara, 1481, Conjunto 147, CEP 13015-002, Campinas, SP, Brazil.
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Carvalho
Department of Animal Biology, Institute of Biology, State University of Campinas - UNICAMP, Cidade Universitária, Barão Geraldo, CP 6109, CEP 13083-970, Campinas, SP, Brazil.
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Magalhães
Department of Animal Biology, Institute of Biology, State University of Campinas - UNICAMP, Cidade Universitária, Barão Geraldo, CP 6109, CEP 13083-970, Campinas, SP, Brazil.
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Zanotti-Magalhães
D000222:Adaptation, Physiological; D000801:Angiostrongylus / Q000472:pathogenicity*; D000818:Animals; D001700:Biomphalaria; D007814:Larva; D012550:Schistosoma mansoni / Q000472:pathogenicity*; D012555:Schistosomiasis mansoni / Q000209:etiology*; D017206:Strongylida Infections / Q000209:etiology*