By Philippe Jarne, Jena-Pierre Pointier (auth.), Rafael Toledo, Bernard Fried (eds.)
This publication on “Biomphalaria Snails and Larval Trematodes” provides modern info at the interactions of those snails and their trematode parasites, relatively on Schistosoma spp. larvae. Snails of the genus Biomphalaria are of important scientific significance due to the fact a number of species during this genus are obligate intermediate hosts of the human blood fluke S. mansoni, the causative agent of hepatosplenic schistosomiasis. as well as the impression of Biomphalaria spp. on public healthiness, those snails also are fascinating versions for the examine of different themes corresponding to inhabitants biology, together with genetics and demography, proteomics, invertebrate immunobiology, mating structures, biogeography, between others. A objective of this e-book is to supply an outline of the new advances in Biomphalaria spp.-larval trematode interactions, specially in Biomphalaria-schistosome structures. Emphasis is put on gaps in our wisdom that must be stuffed to realize a greater figuring out of the relationships in those host-parasite platforms. this can be serious to procure a greater realizing of our wisdom of the transmission of schistosomiasis and different snail-borne parasitic illnesses. The ebook, “Biomphalaria Snails and Larval Trematodes” is a perfect quantity for researchers and complicated scholars attracted to smooth features of parasitology , malacology and public health.
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Additional resources for Biomphalaria Snails and Larval Trematodes
Glabrata but not snail cells (Lai and Canning 1980). Originally described as an ameba, Nuclearia sp. isolated from B. glabrata hearts attaches to and kills both S. mansoni sporocysts and B. glabrata embryonic cells (Stibbs et al. 1979; Owczarzak et al. 1980). This organism has been redescribed as a unicellular eukaryotic symbiont Capsaspora owczarzaki (Hertel et al. 2002). It is more prevalent in laboratory-maintained snails that are resistant to S. mansoni, but may not be the sole reason for the resistance (Hertel et al.
1994) have also supplemented lettuce diet with Tetramin fish food. It has been documented that some snail fauna are scarce in calcium-poor British freshwaters (Boycott 1936). B. glabrata growth rates, relative shell weights, fecundity correlate with increasing calcium concentrations (Thomas et al. 1974), and snails maintained in water with <2 mg/L Ca++ have smaller and extremely fragile shells (Mishkin and Jokinen 1986). 5 mg/L) or very high (75 mg/L), with 30 mg/L being the optimal calcium concentration for the greatest snail fecundity (Mishkin and Jokinen 1986).
Small pieces of chalk (calcium carbonate, CaCO3) have been added to aquaria as a calcium source (MacInnis 1970; Ulmer 1970) with the aim of promoting snail growth and shell hardening. In fact, calcium reserves in B. glabrata increase when snails are infected with Schistosoma mansoni (Shaw and Erasmus 1987; Ong et al. 2004). Hemolymph calcium levels of snails kept in aquaria with chalk sticks for 3 days were higher than those of snails maintained without chalk (Chernin 1963). Another study that compared calcium content of B.