Paramphistomum daubneyi and Fasciola hepatica: The Effect of Dual Infection on Prevalence and Cercarial Shedding in Preadult Lymnaea glabra

Abrous, M.; Rondelaud, D.; Dreyfuss, G.

doi:10.2307/3284217

Cited by 22 publications

(22 citation statements)

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“…Indeed, several studies on experimentally infected snails (Kendall 1950;Boray 1978;Bouix-Busson and Rondelaud 1986) show that complete larval development of F. hepatica with the production of cercariae is only assured in juvenile O. glabra measuring less than 2 mm in height at miracidial exposure (Kendall 1950;Boray 1978). However, if another trematode, Paramphistomum daubneyi, is present (the adults of F. hepatica and P. daubneyi often infect the same cows in central France), dual infections of preadult O. glabra first exposed to the miracidia of P. daubneyi and second to those of F. hepatica are successful and cercarial shedding of F. hepatica occurs from some snails (Abrous et al 1996). Mage et al (2002) found an increase in the prevalences of P. daubneyi infections in cattle from central France after 1990, a fact which might explain most of the F. hepatica infections detected in O. glabra since 1995.…”

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confidence: 97%

Natural infections of Omphiscola glabra (Lymnaeidae) with Fasciola hepatica in central France

Dreyfuss

Vignoles

Rondelaud

2003

Parasitology Research

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As larval forms of Fasciola hepatica have periodically been detected in Omphiscola glabraafter their collection from watercress beds or from meadows since 1995, field investigations in 37 populations of O. glabra were carried from 1996 to 2002. This was done in order to determine the changes in prevalences and intensities of these natural infections with F. hepatica in relation to the type of snail habitat and the year of snail collection. Snails infected with F. hepatica were found in all samples made in swampy meadows and roadside ditches in all years. In fenced pools and walled gardens, snail infections were only found from 1998 and 1999 onwards, respectively. In the four types of habitats, the prevalences of F. hepatica infections increased slightly over time (0.8-2.1% for snails sampled in swampy meadows, for example) but this increase varied with the habitat. The mean shell heights of infected snails (6.2-7.8 mm) were similar whatever the type of habitat. The numbers of cercariae-containing rediae counted in snails sampled in swampy meadows, roadside ditches, and fenced pools significantly increased over time. Significant numerical variation between these redial burdens was also observed in relation to snail habitat. As the larval development of F. hepatica is facilitated by the presence of another trematode larval form ( Paramphistomum daubneyi), the finding of some naturally infected O. glabra in watering places known to have no contact with domestic or wild large mammals might be explained by the development of P. daubneyi in small mammals such as lagomorphs. However, a progressive adaptation of F. hepatica miracidia to O. glabra over time, which would permit the infection of snails at sizes larger than 2 mm, could not be excluded.

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confidence: 97%

Natural infections of Omphiscola glabra (Lymnaeidae) with Fasciola hepatica in central France

Dreyfuss

Vignoles

Rondelaud

2003

Parasitology Research

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“…Nevertheless, experimental infection demonstrated high mortality of the exposed snails, low prevalence, and low cercarial shedding [19]. The second pathway was described during sequential experimental infection of snails with Calicophoron daubneyi followed by F. hepatica , showing successful infection [1]; this was also observed in some naturally infected snails [2]. A third pathway, probably more sustainable, was recorded during the infection of five successive generations of pre-adult snails originating from parents already infected with this parasite, resulting in a progressive increase in prevalence of snail infection and cercarial emergence [48].…”

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confidence: 99%

IsGalba schirazensis(Mollusca, Gastropoda) an intermediate host ofFasciola hepatica(Trematoda, Digenea) in Ecuador?

Caron¹,

Celi-Erazo²,

Hurtrez‐Boussès³

et al. 2017

Parasite

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Fasciolosis is a widely distributed disease in livestock in South America but knowledge about the epidemiology and the intermediate hosts is relatively scarce in Ecuador. For three months, lymnaeid snails were sampled (n = 1482) in Pichincha Province at two sites located in a highly endemic area. Snails were identified (based on morphology and ITS-2 sequences) and the infection status was established through microscopic dissection and a multiplex polymerase chain reaction (PCR)-based technique. Techniques based on morphology were not useful to accurately name the collected snail species. Comparison with available DNA sequences showed that a single snail species was collected, Galba schirazensis. Live rediae were observed in 1.75% (26/1482) and Fasciola sp. DNA was detected in 6% (89/1482) of collected snails. The COX-1 region permitted identification of the parasite as Fasciola hepatica. The relative sensitivity and specificity of the microscope study, compared to PCR results, were 25.84% and 99.78%, respectively. The mean size of the snails recorded positive for F. hepatica through crushing and microscopy was significantly higher than the mean size of negative snails, but there was no such difference in PCR-positive snails. The role of G. schirazensis as an intermediate host of F. hepatica in Ecuador is discussed and the hypothesis of an adaptation of the parasite to this invasive snail is proposed. For the first time, an epidemiological survey based on molecular biology-based techniques assessed the possible role of lymnaeid snails in the epidemiology of fasciolosis in Ecuador.

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“…These species belong to species of the genera Lymnaea [6-11]. Omphiscola [12-17], Stagnicola , Pseudosuccinea [18], and Radix [6,8,11,16,17,19-22]. These observations suggest that many different species of lymnaeid snails may be potential hosts for the larval stages of F. hepatica .…”

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confidence: 99%

New insight in lymnaeid snails (Mollusca, Gastropoda) as intermediate hosts of Fasciola hepatica (Trematoda, Digenea) in Belgium and Luxembourg

Caron

Martens

Lempereur

et al. 2014

Parasites & Vectors

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BackgroundThe present study aims to assess the epidemiological role of different lymnaeid snails as intermediate hosts of the liver fluke Fasciola hepatica in Belgium and Luxembourg.MethodsDuring summer 2008, 7103 lymnaeid snails were collected from 125 ponds distributed in 5 clusters each including 25 ponds. Each cluster was located in a different biogeographic area of Belgium and Luxembourg. In addition, snails were also collected in sixteen other biotopes considered as temporary wet areas. These snails were identified as Galba truncatula (n = 2474) (the main intermediate host of F. hepatica in Europe) and Radix sp. (n = 4629). Moreover, several biological and non-biological variables were also recorded from the different biotopes. DNA was extracted from each snail collected using Chelex® technique. DNA samples were screened through a multiplex PCR that amplifies lymnaeid internal transcribed spacer 2 gene sequences (500–600 bp) (acting as an internal control) and a 124 bp fragment of repetitive DNA from Fasciola sp.ResultsLymnaeid snails were found in 75 biotopes (53.2%). Thirty individuals of G. truncatula (1.31%) and 7 of Radix sp. (0.16%) were found to be positive for Fasciola sp. The seven positive Radix sp. snails all belonged to the species R. balthica (Linnaeus, 1758). Classification and regression tree analysis were performed in order to better understand links and relative importance of the different recorded factors. One of the best explanatory variables for the presence/absence of the different snail species seems to be the geographic location, whereas for the infection status of the snails no obvious relationship was linked to the presence of cattle.ConclusionsEpidemiological implications of these findings and particularly the role of R. balthica as an alternative intermediate host in Belgium and Luxembourg were discussed.

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Paramphistomum daubneyi and Fasciola hepatica: The Effect of Dual Infection on Prevalence and Cercarial Shedding in Preadult Lymnaea glabra

Cited by 22 publications

References 9 publications

Natural infections of Omphiscola glabra (Lymnaeidae) with Fasciola hepatica in central France

Natural infections of Omphiscola glabra (Lymnaeidae) with Fasciola hepatica in central France

IsGalba schirazensis(Mollusca, Gastropoda) an intermediate host ofFasciola hepatica(Trematoda, Digenea) in Ecuador?

New insight in lymnaeid snails (Mollusca, Gastropoda) as intermediate hosts of Fasciola hepatica (Trematoda, Digenea) in Belgium and Luxembourg

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