Resistance of Helisoma trivolvis from the Dominican Republic to Infection by the Trematode Schistosoma mansoni

Ayvazian, Suzanne G.; Mallett, John C.

doi:10.2307/3281479

Cited by 3 publications

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“…Helisoma trivolvis (Say, 1817), a planorbid snail that could be mistaken for Biomphalaria by untrained collectors, was collected in the metal ponds at the Roseau Botanic Garden. Helisoma trivolvis is established in the Dominican Republic and possibly Haiti and Cuba (Ayvazian andMallett 1986, Paraense 2003). A congeneric species, Helisoma diiryi (Wetherby, 1879) is also established in the Caribbean {e.g.. Pointier 2001).…”

Section: Resultsmentioning

confidence: 99%

“…A congeneric species, Helisoma diiryi (Wetherby, 1879) is also established in the Caribbean {e.g.. Pointier 2001). Helisoma trivolvis is naturally resistant to infection by Schistosoma mansoni (Ayvazian and Mallett 1986), but this snail is an intermediate host to clinostomatid, cyclocoeliid, echinostomatid, and strigeid trematodes and is used as a laboratory host to nematodes in the genus Angiostrongylus (Malek 1980, Ponder andFried 2004). Humans and domestic animals can be infected by some of these worms, including Alaria catiis, which can cause fatal infections in humans (Malek 1980).…”

Section: Resultsmentioning

confidence: 99%

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Freshwater snails (Mollusca: Gastropoda) from the Commonwealth of Dominica with a discussion of their roles in the transmission of parasites

Reeves

Dillon

Dasch

2008

American Malacological Bulletin

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We collected six species of freshwater snails from Dominica, including Biomphalaria hiliniana (Clessin, 1883), Gundlachin radiata (Guilding, 1828), Helisoma (=Phworbella) trivolvis (Say, 1817), Melatwides tuberculata (Mtiller, 1774), Neritina puuctidata Lamarck, 1816, and Physa marmorata Guilding, 1828. Our collections indicate that un-reported species such as G. radiata and H. trivolvis are established on Dominica, West Indies. We tested a limited number of M. tuberculata for rickettsial pathogens, Neorickettsia spp., but did not identify this agent. Three species of snails previously reported from Dominica, Biomphalaria glabrata (Say, 1818), Biomphalaria straminea (Dunker, 1848), and Thiara granifera (Lamarck, 1822), were not collected. Our data suggest that B. glabrata has not re-emerged as a prominent component of the freshwater snail fauna since it disappeared or was locally eradicated. In addition, previous reports of B. straminea were probably misidentifications of B. kuhniaua, and some abnormally large specimens of M. ttd^erculata from Freshwater Lake could be misidentified as T. granifera. Our sampling was not adequate to demonstrate that T. granifera was absent from Dominica. We determined that B. kuhniana was not eradicated by previous molluscan control regimes. Additional studies on the relationships of freshwater snails in Dominica to helminths of animals and humans are needed to understand the public and veterinary health significance of these snails.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Freshwater snails (Mollusca: Gastropoda) from the Commonwealth of Dominica with a discussion of their roles in the transmission of parasites

Reeves

Dillon

Dasch

2008

American Malacological Bulletin

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A phylogeny of planorbid snails, with implications for the evolution of Schistosoma parasites

Morgan

DeJong

Jung

et al. 2002

Molecular Phylogenetics and Evolution

104

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Incompatibility Between Miracidia of Schistosoma mansoni and Helisoma duryi Occurs at Two Stages: Penetration and Intramolluscan Establishment

Sullivan

Yeung

2011

Journal of Parasitology

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Helisoma spp. snails are not susceptible to infection with miracidia of Schistosoma mansoni because the miracidia do not penetrate them. However, in view of the phylogenetic proximity and histocompatibility between Helisoma spp. and the normal intermediate host, Biomphalaria glabrata , schistosome miracidia conceivably could survive if experimentally introduced into the hemocoel of Helisoma spp. To test this hypothesis, schistosome-susceptible NIH albino B. glabrata, schistosome-resistant Salvador B. glabrata, and Helisoma duryi were injected with miracidia of S. mansoni, and the outcome was followed both by monitoring snails for infection for several weeks and by histological examination at 24 and 48 hr post-injection (PI). Patent infections developed in most NIH albino snails but in none of the Salvador B. glabrata or H. duryi individuals. Histological analysis showed a higher proportion of normal sporocysts in various tissues of NIH albino snails at both time periods relative to Salvador snails, which contained mostly sporocysts undergoing hemocytic encapsulation. In H. duryi , nearly all sporocysts were dead by 48 hr PI.

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Resistance of Helisoma trivolvis from the Dominican Republic to Infection by the Trematode Schistosoma mansoni

Cited by 3 publications

References 0 publications

Freshwater snails (Mollusca: Gastropoda) from the Commonwealth of Dominica with a discussion of their roles in the transmission of parasites

Freshwater snails (Mollusca: Gastropoda) from the Commonwealth of Dominica with a discussion of their roles in the transmission of parasites

A phylogeny of planorbid snails, with implications for the evolution of Schistosoma parasites

Incompatibility Between Miracidia of Schistosoma mansoni and Helisoma duryi Occurs at Two Stages: Penetration and Intramolluscan Establishment

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