The effect of nutrition on the growth of <i>Fasciola hepatica</i> in its snail host

Kendall, Sophie; Ollerenshaw, C. B.

doi:10.1079/pns19630010

Cited by 33 publications

(19 citation statements)

References 2 publications

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“…As shown in Table 3, high numbers of metacercariae (more than 500 per CS snail) were only obtained from a few CS snails (a total of 2.5-4.2% in groups 1, 2, and 4) when snail infections were performed using two miracidia per snail. A high production of cercariae (from 1,078 to 2,275 larvae per CS snail) has already been reported by Kendall (1949) and Kendall and Ollerenshaw (1963) for several well-fed G. truncatula, each being exposed to large numbers of F. hepatica miracidia. In the same way, a mean production of 1,639 cercariae was obtained by Rondelaud et al (2004) from two G. truncatula, originating from siliceous soils subjected to routine bimiracidial exposures and raised on lettuce plus Tetraphyll.…”

Section: Discussionmentioning

confidence: 79%

A retrospective study on the metacercarial production of Fasciola hepatica from experimentally infected Galba truncatula in central France

et al. 2005

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A retrospective study of the experiments performed during the past 15 years on infections of Galba truncatula with Fasciola hepatica was carried out to determine what susceptible populations of snails might be used for the commercial production of metacercariae, and to examine this metacercarial production in relation to the characteristics of snail infections. Of the four groups of snail populations studied, the ablest snails to sustain a complete larval development of F. hepatica originated from populations living on siliceous soils at 600 m and more in altitude. In contrast, snail populations living along river banks on siliceous soils were inappropriate due to the poor characteristics of snail infections (high snail mortality, low prevalence of snail infections, and low number of cercariae produced). Except for these last populations, 86-87% of cercaria-shedding (CS) snails in the other populations shed less than 300 cercariae, even if a maximum of 1,772 cercariae were obtained from a single snail. The date of the first cercarial shedding at 20 degrees C began during week 7 or 8 PE for 80.1-83.5% of CS snails. Most metacercariae (82.0-85.9% of the total production) were recorded during the first 10 days of the patent period. In these conditions, the authors collected metacercarial production up to the beginning of week 10 PE (20 degrees C) and did not use snails that shed their cercariae during the following weeks due to too low numbers of parasites. This method allows to have a continuous production of metacercariae over time by using successive groups of infected snails, each being separated from the other by a fortnight's time.

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Section: Discussionmentioning

confidence: 79%

A retrospective study on the metacercarial production of Fasciola hepatica from experimentally infected Galba truncatula in central France

et al. 2005

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“…The time over which snails shed is variable, and shedding is not continuous. Under experimental conditions a number of factors can influence the capacity of the snail to produce cercariae, for example the number of miracidia that infect a snail as well as the nutrition, age and size of the snail (Belfaiza, Abrous, Rondelaud, Moncef, & Dreyfuss, ; Dreyfuss, Vignoles et al., ; Kendall & Ollerenshaw, ; Vignoles, Rondelaud, & Dreyfuss, ).…”

Section: Snail Biologymentioning

confidence: 99%

Fasciola and fasciolosis in ruminants in Europe: Identifying research needs

Beesley

Caminade

Charlier

et al. 2017

Transbound Emerg Dis

158

111

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Summary Fasciola hepatica is a trematode parasite with a global distribution, which is responsible for considerable disease and production losses in a range of food producing species. It is also identified by WHO as a re‐emerging neglected tropical disease associated with endemic and epidemic outbreaks of disease in human populations. In Europe, F. hepatica is mostly associated with disease in sheep, cattle and goats. This study reviews the most recent advances in our understanding of the transmission, diagnosis, epidemiology and the economic impact of fasciolosis. We also focus on the impact of the spread of resistance to anthelmintics used to control F. hepatica and consider how vaccines might be developed and applied in the context of the immune‐modulation driven by the parasite. Several major research gaps are identified which, when addressed, will contribute to providing focussed and where possible, bespoke, advice for farmers on how to integrate stock management and diagnosis with vaccination and/or targeted treatment to more effectively control the parasite in the face of increasing the prevalence of infection and spread of anthelmintic resistance that are likely to be exacerbated by climate change.

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“…Indeed, in G. truncatula, the higher success is obtained when the molluscs are 4 weeks old (Rondelaud et al 2009b). Moreover, well-fed G. truncatula are less susceptible to infection and exhibit a higher redial production than starved snails (Kendall 1949;Kendall and Ollerenshaw 1963;Abrous et al 1999). Stress induced by pollution can also increase the risks of infection .…”

Section: Intra-population Variationsmentioning

confidence: 99%

Natural prevalence in Cuban populations of the lymnaeid snail Galba cubensis infected with the liver fluke Fasciola hepatica: small values do matter

et al. 2015

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Natural infections of lymnaeid snails by Fasciola hepatica are of primary importance to study transmission. Also, infected snails in the field can be used to explore the existing compatibility in host-parasite interactions. This paper aimed to describe the infection rate of Galba cubensis populations in fasciolosis transmission areas. Eight sites were sampled in western Cuba and 24 infected snails at six sites were found. The mean prevalence was 2.94% and the maximum value was 11.4%. The intensity of parasite infection was assessed as the number of rediae inside a single snail. High variation within the sites examined was observed, but a maximum of 76 rediae was recovered from one individual. Although the presence of two other trematode families (Schistosomatidae and Paramphistomatidae) was discovered in dissected individuals, no co-infection with F. hepatica was observed. This is the first time a study of natural prevalence of F. hepatica infection is carried out in Cuba, considered a hyper endemic country for bovine fasciolosis. Our results suggest that fasciolosis transmission may occur even when the number of infected snails remains relatively low.

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The effect of nutrition on the growth of Fasciola hepatica in its snail host

Cited by 33 publications

References 2 publications

A retrospective study on the metacercarial production of Fasciola hepatica from experimentally infected Galba truncatula in central France

A retrospective study on the metacercarial production of Fasciola hepatica from experimentally infected Galba truncatula in central France

Fasciola and fasciolosis in ruminants in Europe: Identifying research needs

Natural prevalence in Cuban populations of the lymnaeid snail Galba cubensis infected with the liver fluke Fasciola hepatica: small values do matter

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