Southernmost finding of Lymnaea viatrix orbigny, 1835 (Pulmonata: Lymnaeidae), intermediate host of Fasciola hepatica (Linnaeus, 1758) (Trematoda: Digenea), in urban and rural areas of Patagonia, Argentina

Kleiman, Florencia; Pietrokovsky, Silvia; Paraense, W. Lobato; Wisnivesky‐Colli, Cristina

doi:10.1590/s0074-02762004000100004

Cited by 14 publications

(5 citation statements)

References 4 publications

(5 reference statements)

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“…G. viatrix is the main intermediate host of F. hepatic a in Argentina [21,22] and has a remarkable plasticity to adapt to many different habitats and environmental conditions, including artificially made water reservoirs [40]. These national patterns of distribution were mirrored in the present study, with G. viatrix showing the widest distribution pattern, inhabiting 4 out of the 7 study sites.…”

Section: Discussionsupporting

confidence: 62%

Molecular characterization of cryptic and sympatric lymnaeid species from the Galba/Fossaria group in Mendoza Province, Northern Patagonia, Argentina

et al. 2013

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BackgroundFreshwater lymnaeid snails can act as the intermediate hosts for trematode parasites such as the liver fluke Fasciola hepatica, that cause significant economic and biomedical burden worldwide, particularly through bovine fascioliasis. Transmission potential is tightly coupled to local compatibility with snail hosts, so accurate identification of lymnaeid species is crucial for understanding disease risk, especially when invasive species are encountered. Mendoza Province, in Argentina, is a center of livestock production and also an area of endemic fascioliasis transmission. However, the distribution of lymnaeid species in the region is not well known.MethodsThis study examined lymnaeid snails from seven localities in the Department of Malarguë, Mendoza Province, using morphological and molecular analyses and also describing ecological variables associated with snail presence.ResultsWhile morphological characters identified two species of lymnaeid, Galba truncatula and G. viatrix, molecular data revealed a third, cryptic species, G. neotropica, which was sympatric with G. viatrix. G. truncatula was exclusively found in high altitude (>1900 meters above sea level [masl]) sites, whereas mixed G. neotropica/G. viatrix localities were at middle elevations (1300–1900 masl), and G. viatrix was found alone at the lowest altitude sites (<1300 masl). Phylogenetic analysis using two mitochondrial markers revealed G. neotropica and G. viatrix to be closely related, and given their morphological similarities, their validities as separate taxonomic entities should be questioned.ConclusionsThis study highlights the need of a robust taxonomic framework for the identification of lymnaeid snails, incorporating molecular, morphological and ecological variables while avoiding nomenclature redundancy. As the three species observed here, including one alien invasive species, are considered hosts of varying susceptibility to Fasciola parasites, and given the economic importance of fascioliasis for livestock production, this research has critical importance for the ultimate aim of controlling disease transmission.

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Section: Discussionsupporting

confidence: 62%

Molecular characterization of cryptic and sympatric lymnaeid species from the Galba/Fossaria group in Mendoza Province, Northern Patagonia, Argentina

et al. 2013

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“…Lymnaeid snails identified as viatrix or cubensis are commonly cited in the literature as playing the role of intermediate host for the liver fluke Fasciola hepatica (Morales & Pino 1981, Pino & Morales 1982, Lara et al 1988, Larrea et al 1993, Rangel-Ruiz 1993, Kleiman et al 2004). Unfortunately, due to the difficulty of a clear morphological identification, it is quite impossible to know which species is actually involved in the transmission of the parasite in order to develop effective measures of control.…”

Section: Discussionmentioning

confidence: 99%

Anatomical studies of sibling species within neotropical lymnaeids, snail intermediate hosts of fascioliasis

Pointier

Cazzaniga

González‐Salas

et al. 2006

Mem. Inst. Oswaldo Cruz

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Several anatomical parameters of the reproductive system have been used to distinguish Key words: Neotropical lymnaeids -sibling species -Lymnaea cubensis -Lymnaea viatrixEleven species of lymnaeid snails have been described in the Caribbean area and South America. However, only six species are considered as valid by Hubendick (1951) and Paraense (1976Paraense ( , 1982aParaense ( , 1983Paraense ( , 1984Paraense ( , 1986Paraense ( , 1994Paraense ( , 1995: Paraense, 1982 and L. columella Say, 1817. This last species has now a very large distribution in all tropical countries particularly in the neotropical area (see Malek & Chrosciechowski 1964, Paraense 1982b, Gomez et al. 1986). Two other species may be added to that list (i) L. truncatula (Müller, 1774) from Europe which recently invaded several Andean countries (Oviedo et al. 1995, Jabbour-Zahab et al. 1997, Durand et al. 2002; (ii) L. plicata Hylton-Scott, 1953 from Chubut Province, Argentina which validity has not yet been confirmed.The morphology of the shell and reproductive system of five of those species has been well studied and allows a clear identification (Paraense 1982a, 1984, 1986, 1995, Samadi et al. 2000, Pointier et al. 2004 Moreover, an analysis of the genetic variability based on 12 enzyme loci revealed different fixed alleles at nine loci between two syntopic samples of L. viatrix var. elongata at the type locality in Lima, Peru (Durand et al. 2002). The absence of heterozygotes within this locality thus indicated the presence of isolated populations or cryptic species within the variety elongata. In the same study, Durand et al. (2002) also found significant genetic differences between the two taxa from Lima and another population sampled in Bahia Blanca, Argentina, located about 350 km to the north of the type locality for L. viatrix var. ventricosa. More recently, the use of several molecular markers (PCR-RLFP analysis of the ITS1 and ITS2 rDNA and 16S rDNAmt using 12 restriction enzymes) in a study of several populations morphologically identified as L. viatrix from Brazil, Uruguay, and Argentina showed a high level of genetic polymorphism between populations which was interpreted as an intra-specific variation (Carvalho et al. 2004).A morphological comparison of several populations of L. cubensis from the Caribbean area and several populations of the introduced L. truncatula from Bolivia was carried out by Samadi et al. (2000) using several conchological and anatomical characters of the reproductive system. The conchological study showed the presence of a large amount of variability within and between populations that did not allow distinction between taxa. The analysis of anatomical parameters of the reproductive system also showed a high variability, but all these characters clearly separated L. cubensis from L. truncatula independently from their geographical origin. In the present paper, we use these anatomical characters in the same way to see if it is possible to distinguish morphologically L. cubensis from L. viatrix. The materia...

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“…Several studies have indicated a relation between humidity and/or temperature with the emergence of lymneid snails and their infestation by F. hepatica, albeit the period of the year when they peak depends on the species of the mollusc and the location of the study area, especially its altitude (Malone et al, 1985;Manga-Gonzáles et al, 1991;Rangel, 1999;Cañete et al, 2004;Kleiman et al, 2004Kleiman et al, , 2007Cruz-Mendoza et al, 2004, 2005. In places like Ireland, where the temperature is around 29 • C the whole year, the snails are rarely in aestivation and the prevalence in livestock has small fluctuations (Ross, 1977).…”

Section: Discussionmentioning

confidence: 99%

Transmission dynamics of Fasciola hepatica in the Plateau Region of Mexico. Effect of weather and treatment of mammals under current farm management

Cruz-Mendoza¹,

Quiróz-Romero²,

Correa³

et al. 2011

Veterinary Parasitology

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Southernmost finding of Lymnaea viatrix orbigny, 1835 (Pulmonata: Lymnaeidae), intermediate host of Fasciola hepatica (Linnaeus, 1758) (Trematoda: Digenea), in urban and rural areas of Patagonia, Argentina

Cited by 14 publications

References 4 publications

Molecular characterization of cryptic and sympatric lymnaeid species from the Galba/Fossaria group in Mendoza Province, Northern Patagonia, Argentina

Molecular characterization of cryptic and sympatric lymnaeid species from the Galba/Fossaria group in Mendoza Province, Northern Patagonia, Argentina

Anatomical studies of sibling species within neotropical lymnaeids, snail intermediate hosts of fascioliasis

Transmission dynamics of Fasciola hepatica in the Plateau Region of Mexico. Effect of weather and treatment of mammals under current farm management

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