Atração miraxonal exercida por Biomphalaria straminea, Lymnaea columella e Physa sp, sobre miracídios de Schistosoma mansoni da linhagem BH

Magalhães, Luiz Augusto; Zanotti-Magalhães, Eliana Maria; Carvalho, José Ferreira de; Faraone, Marina

doi:10.1590/s0034-89101991000100005

Cited by 2 publications

(1 citation statement)

References 5 publications

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“…The repellence to miracidia of S. mansoni had already been described by Magalhães et al 12 (1991) in a sample of Biomphalaria straminea. These authors concluded that snails can have the ability to emanate substances repulsive to the miracidia.…”

Section: Rev Saúde Pública 31 (2) 1997supporting

confidence: 57%

Observations on the miraxonal attraction exercised by sexually immature or adult Biomphalaria glabrata infected or not by Schistosoma mansoni

1997

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ObjectiveThe influence of age and the presence of secondary sporocysts in the miraxonal attraction exercised by Biomphalaria glabrata on miracidia of Schistosoma mansoni of the BH strain were studied. Material and MethodA glass apparatus containing two compartments joined by a tube and previously tested in other experiments, was used. Specimens of B. glabrata or its snail conditioned water (SCW) selected before the first oviposition (sexually immature), after the first oviposition (adult), with or without secondary sporocysts, were used to attract the miracidia. ResultsIt was noted that snails or their SCW containing secondary sporocysts lost the ability to attract miracidia. The sexual maturity of the snail did not influence miraxonal attraction. The factors to be studied were thus: -sexual maturity ( immature, mature) -infection (no: no secondary sporocysts; yes: presence of secondary sporocysts) -source (mollusk, SCW) Every combination of the levels of the three factors, comprising eight experimental settings, were tested in a completely randomized experiment. Ten replications were performed. The resulting eighty uses of the artifact described below were performed in random order. An additional setting, with only dechlorinated water, was tested for the sole purpose of checking the experimental device.A previously tested glass artifact was used for the study of miraxonal attraction. The artifact is composed of two circular chambers, with 30 mm diameter and 20 mm depth, joined by a channel of 40 mm lenght, 11 mm width and 10 mm depth (Brasio et al. 2 , 1985). Each run of the experiment was carried out by allocating a mollusk or SCW in a randomly chosen chamber of the artifact and depositing ten BH strain miracidia in the channel. The result of the run was the frequencies of miracidia in each compartment of the artifact -chamber with mollusk or SCW, empty chamber or channel, after fifteen minutes. A stereoscopic microscope with 0.5 reductor frontal glass was used for the observation and counting of miracidia.Standard RESULTS

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Section: Rev Saúde Pública 31 (2) 1997supporting

confidence: 57%

Observations on the miraxonal attraction exercised by sexually immature or adult Biomphalaria glabrata infected or not by Schistosoma mansoni

1997

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SPATIAL DISTRIBUTION OF LYMNAEIDAE (MOLLUSCA, BASOMMATOPHORA), INTERMEDIATE HOST OF Fasciola hepatica LINNAEUS, 1758 (TREMATODA, DIGENEA) IN BRAZIL

Medeiros

Scholte²,

D’ávila

et al. 2014

Rev. Inst. Med. trop. S. Paulo

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Snails of the family Lymnaeidae act as intermediate hosts in the biological cycle of Fasciola hepatica, which is a biological agent of fasciolosis, a parasitic disease of medical importance for humans and animals. The present work aimed to update and map the spatial distribution of the intermediate host snails of F. hepatica in Brazil. Data on the distribution of lymnaeids species were compiled from the Collection of Medical Malacology (Fiocruz-CMM, CPqRR), Collection of Malacology (MZUSP), “SpeciesLink” (CRIA) network and through systematic surveys in the literature. Our maps of the distribution of lymnaeids show that Pseudosuccinea columella is the most common species and it is widespread in the South and Southeast with few records in the Midwest, North and Northeast regions. The distribution of the Galba viatrix, G. cubensis and G. truncatula showed a few records in the South and Southeast regions, they were not reported for the Midwest, North and Northeast. In addition, in the South region there are a few records for G. viatrix and one occurrence of Lymnaea rupestris. Our findings resulted in the first map of the spatial distribution of Lymnaeidae species in Brazil which might be useful to better understand the fasciolosis distribution and delineate priority areas for control interventions.

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Atração miraxonal exercida por Biomphalaria straminea, Lymnaea columella e Physa sp, sobre miracídios de Schistosoma mansoni da linhagem BH

Cited by 2 publications

References 5 publications

Observations on the miraxonal attraction exercised by sexually immature or adult Biomphalaria glabrata infected or not by Schistosoma mansoni

Observations on the miraxonal attraction exercised by sexually immature or adult Biomphalaria glabrata infected or not by Schistosoma mansoni

SPATIAL DISTRIBUTION OF LYMNAEIDAE (MOLLUSCA, BASOMMATOPHORA), INTERMEDIATE HOST OF Fasciola hepatica LINNAEUS, 1758 (TREMATODA, DIGENEA) IN BRAZIL

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