Exposure of the snail Potamopyrgus antipodarum to herbicide boosts output and survival of parasite infective stages

Hock, Sabrina; Poulin, Robert

doi:10.1016/j.ijppaw.2012.10.002

Cited by 14 publications

(9 citation statements)

References 44 publications

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“… 10 – 12 Multiple herbicides can affect algal community composition to benefit snail populations. 11 , 12 , 40 , 41 Furthermore, eutrophication caused by nutrient-loaded agricultural runoff from fields using fertilisers is widespread and might become more common as fertiliser use increases. 42 Eutrophication caused by increased human population densities, land use change, and dam infrastructure is associated with increased human exposure to trematode cercariae in the Mekong River basin, Chile, and around Lake Malawi.…”

Section: Discussionmentioning

confidence: 99%

Effects of agrochemical pollution on schistosomiasis transmission: a systematic review and modelling analysis

Hoover

Rumschlag

Strgar

et al. 2020

The Lancet Planetary Health

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Background Agrochemical pollution of surface waters is a growing global environmental challenge, especially in areas where agriculture is rapidly expanding and intensifying. Agrochemicals might affect schistosomiasis transmission through direct and indirect effects on Schistosoma parasites, their intermediate snail hosts, snail predators, and snail algal resources. We aimed to review and summarise the effects of these agrochemicals on schistosomiasis transmission dynamics. Methods We did a systematic review of agrochemical effects on the lifecycle of Schistosoma spp and fitted dose-response models to data regarding the association between components of the lifecycle and agrochemical concentrations. We incorporated these dose-response functions and environmentally relevant concentrations of agrochemicals into a mathematical model to estimate agrochemical effects on schistosomiasis transmission. Dose-response functions were used to estimate individual agrochemical effects on estimates of the agrochemically influenced basic reproduction number, R 0 , for Schistosoma haematobium . We incorporated time series of environmentally relevant agrochemical concentrations into the model and simulated mass drug administration control efforts in the presence of agrochemicals. Findings We derived 120 dose-response functions describing the effects of agrochemicals on schistosome lifecycle components. The median estimate of the basic reproduction number under agrochemical-free conditions, was 1·65 (IQR 1·47–1·79). Agrochemical effects on estimates of R 0 for S haematobium ranged from a median three-times increase ( R 0 5·05, IQR 4·06–5·97) to transmission elimination ( R 0 0). Simulations of transmission dynamics subject to interacting annual mass drug administration and agrochemical pollution yielded a median estimate of 64·82 disability-adjusted life-years (DALYs) lost per 100,000 people per year (IQR 62·52–67·68) attributable to atrazine use. In areas where aquatic arthropod predators of intermediate host snails suppress transmission, the insecticides chlorpyrifos (6·82 DALYs lost per 100,000 people per year, IQR 4·13–8·69) and profenofos (103·06 DALYs lost per 100,000 people per year, IQR 89·63–104·90) might also increase the disability burden through their toxic effects on arthropods. Interpretation Expected environmental concentrations of agrochemicals alter schistosomiasis transmission through direct and indirect effects on intermediate host and parasite densities. As industrial agricultural practices expand in areas where schistosomiasis is endemic, strategies to prevent increases in transmission due to agrochemical pollution should be developed and...

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Section: Discussionmentioning

confidence: 99%

Effects of agrochemical pollution on schistosomiasis transmission: a systematic review and modelling analysis

Hoover

Rumschlag

Strgar

et al. 2020

The Lancet Planetary Health

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“…We can suggest that chemical treatments used in wine crops could modulate levels of parasitic infestation in snail populations. Indeed, Hock and Poulin [ 82 ] observed that pollutants can lead to increase cercariae excretion from aquatic snails.…”

Section: Discussionmentioning

confidence: 99%

Intermediate hosts of Protostrongylus pulmonalis (Frölich, 1802) and P. oryctolagi Baboš, 1955 under natural conditions in France

et al. 2015

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BackgroundProtostrongylus oryctolagi and P. pulmonalis are causative agents of pulmonary protostrongyliasis in Lagomorphs in France. These nematodes need usually one intermediate host for its life cycle, a terrestrial snail. However, some studies, mainly in experimental conditions, have identified the species of snails acting as intermediate hosts.MethodsIn total, 3315 terrestrial snails and 307 slugs were collected in the field in South-Eastern France and analyzed to detect the presence of parasites. Identification of nematode parasites and snails were performed according to morphological and molecular approaches (D2 domain of the 28S rDNA for parasites; 18S and ITS-1 rDNA, COI and 16S mtDNA for snails).ResultsEighteen snails were found positive for Protostrongylids larvae. Haplotypes of the larvae corresponding to sequences of P. oryctolagi and P. pulmonalis were detected. Morphological identification of molluscs based on shell characters revealed 4 different morphotypes, and molecular results confirm the membership of these gastropods to the Hygromiidae and revealed 4 different species: Candidula gigaxii, 2 species of Cernuella sp. and Xeropicta derbentina. All infested snails were collected in wine cultures.ConclusionThis study displays the first description of intermediate hosts of P. oryctolagi and the first report of X. derbentina as natural intermediate host of P. pulmonalis.

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“…(Gérard & Le Lannic ), Coitocaecum parvum Crowcroft, 1945 and Apatemon Szidat, 1928 sp. (Hock & Poulin ); unfortunately, 16S sequences of those species are not in GenBank. Thus, it cannot be excluded that the parasites detected on the basis of our sequences actually originated from the snails.…”

Section: Discussionmentioning

confidence: 99%

The diet and distribution of Pentacoelum kazukolinda (Kawakatsu & Mitchell, 1984), a maricolan planarian with a freshwater ecology

et al. 2014

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Among the marine triclads or Maricola, the genus Pentacoelum represents one of the few exceptions in that species occur in brackish water or in freshwater. We examined specimens of a maricolan triclad that externally looked remarkably similar to the continental Spanish representatives of freshwater Pentacoelum hispaniense, albeit that these new samples came from habitats in Germany, the Netherlands, Mallorca and Japan. Comprehensive comparative morphological studies revealed that the animals from these populations are identical to a species described earlier from Hawaii, viz. Oahuhawaiiana kazukolinda Kawakatsu & Mitchell, 1984. It is argued that the species now should be called Pentacoelum kazukolinda (Kawakatsu & Mitchell, 1984) comb. nov. Remarkably, Dutch and German specimens of P. kazukolinda almost completely lack any signs of the presence of the lateral gonopore system, being the defining feature of their taxonomic family, the Bdellouridae. The reason for this reduction or even complete absence of this structure remains obscure. Nonetheless, morphological similarities and 18S rDNA sequences strongly suggest that all animals belong to the same species. Analyses of the mitochondrial gene sequences Cox1 and 16SrDNA of the gut content of P. kazukolinda revealed that the flatworm has a preference for different species of gastropods, while in one population annelids were detected. Our study suggests that gastropods may form the food refuge of P. kazukolinda. Circumstantial evidence suggests that the worldwide distribution of P. kazukolinda may result from human‐mediated transport of the aroid Colocasia esculenta and/or the introduced snail Potamopyrgus antipodarum. The use of P. antipodarum as a food resource may have facilitated the spread and establishment of new populations of P. kazukolinda.

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Exposure of the snail Potamopyrgus antipodarum to herbicide boosts output and survival of parasite infective stages

Cited by 14 publications

References 44 publications

Effects of agrochemical pollution on schistosomiasis transmission: a systematic review and modelling analysis

Effects of agrochemical pollution on schistosomiasis transmission: a systematic review and modelling analysis

Intermediate hosts of Protostrongylus pulmonalis (Frölich, 1802) and P. oryctolagi Baboš, 1955 under natural conditions in France

The diet and distribution of Pentacoelum kazukolinda (Kawakatsu & Mitchell, 1984), a maricolan planarian with a freshwater ecology

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