Effects of diet and Echinostoma revolutum infection on energy allocation patterns in juvenile Lymnaea elodes snails

Sandland, Gregory J.; Minchella, Dennis J.

doi:10.1007/s00442-002-1127-x

Cited by 69 publications

(55 citation statements)

References 53 publications

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“…For snail-trematode interactions, gigantism is often postulated to benefit the parasite as a larger host provides a greater volume for parasite occupation and reproduction. 38,39 Indeed, results from our work support this idea as larger infected B. s. goniomphalos contained higher numbers of virgulate sporocysts than smaller individuals. Further, miracidia are generally attracted to larger-size snails, as they are more active and have more of the body exposed as a target for miracidia.…”

Section: Discussionsupporting

confidence: 68%

Seasonal Transmission of Opisthorchis viverrini sensu lato and a Lecithodendriid Trematode Species in Bithynia siamensis goniomphalos Snails in Northeast Thailand

Namsanor¹,

Sithithaworn²,

Kopolrat³

et al. 2015

The American Journal of Tropical Medicine and Hygiene

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Abstract. Seasonal changes play roles in the transmission success of fish-borne zoonotic trematodes (FZT). This study examined the seasonal transmission patterns of Opisthorchis viverrini sensu lato (s.l.) and a virgulate cercaria (family Lecithodendriidae) in the snail intermediate host, Bithynia siamensis goniomphalos in northeast Thailand. Snail samples were collected monthly during the rainy, cool, and hot seasons during 2012-2013 to determine the prevalence and intensity of larval trematode infections. The prevalence of O. viverrini s.l. varied significantly with season, being 0.31%, 1.05%, and 0.37% in the rainy, cool, and hot seasons, respectively (P 0.05). Similarly, the prevalence of virgulate cercariae was 3.11%, 6.80%, and 1.64% in the rainy, cool, and hot seasons, respectively (P 0.05). The intensity of larval trematode infections also varied between seasons and peaked in the hot season (P 0.05) in both species. The snails infected with O. viverrini s.l. were significantly smaller (P 0.05) and those infected with virgulate cercariae were significantly larger (P 0.05) than uninfected snails. Seasonal variation and the different sizes of B. s. goniomphalos parasitized by O. viverrini s.l. and virgulate trematodes indicate complex host-parasite interactions with important implications for the epidemiology of O. viverrini s.l.

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Section: Discussionsupporting

confidence: 68%

Seasonal Transmission of Opisthorchis viverrini sensu lato and a Lecithodendriid Trematode Species in Bithynia siamensis goniomphalos Snails in Northeast Thailand

Namsanor¹,

Sithithaworn²,

Kopolrat³

et al. 2015

The American Journal of Tropical Medicine and Hygiene

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“…3C). This likely occurred because of enhanced snail survival and growth under high-resource conditions (older and larger snails generally produce more parasites) or because of an increased capacity to translate snail resources into parasite secondary production (12,15,(23)(24)(25). Importantly, although nutrient-mediated increases in infected host size contributed strongly to the observed increase in cer- Fig.…”

Section: Discussionmentioning

confidence: 93%

“…First, higher resource availability will increase the population growth of susceptible snail hosts (22), leading to enhanced parasite transmission and a higher density of infected snails (12). Second, higher resource levels will reduce infected snail mortality, increase snail body size, and enhance host vigor (15,(23)(24)(25), promoting parasite secondary production within infected individuals. Thus, a higher density of infected snails and a greater per-snail production of parasites should jointly drive an increase in amphibian infection and disease risk.…”

mentioning

confidence: 99%

Aquatic eutrophication promotes pathogenic infection in amphibians

Johnson

Chase²,

Dosch³

et al. 2007

Proc. Natl. Acad. Sci. U.S.A.

306

299

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The widespread emergence of human and wildlife diseases has challenged ecologists to understand how large-scale agents of environmental change affect host-pathogen interactions. Accelerated eutrophication of aquatic ecosystems owing to nitrogen and phosphorus enrichment is a pervasive form of environmental change that has been implicated in the emergence of diseases through direct and indirect pathways. We provide experimental evidence linking eutrophication and disease in a multihost parasite system. The trematode parasite Ribeiroia ondatrae sequentially infects birds, snails, and amphibian larvae, frequently causing severe limb deformities and mortality. Eutrophication has been implicated in the emergence of this parasite, but definitive evidence, as well as a mechanistic understanding, have been lacking until now. We show that the effects of eutrophication cascade through the parasite life cycle to promote algal production, the density of snail hosts, and, ultimately, the intensity of infection in amphibians. Infection also negatively affected the survival of developing amphibians. Mechanistically, eutrophication promoted amphibian disease through two distinctive pathways: by increasing the density of infected snail hosts and by enhancing per-snail production of infectious parasites. Given forecasted increases in global eutrophication, amphibian extinctions, and similarities between Ribeiroia and important human and wildlife pathogens, our results have broad epidemiological and ecological significance.amphibian decline ͉ emerging disease ͉ environmental change

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“…Host responses to infection vary widely but include increased mortality, reduced reproduction, and changes in behavior (Sorensen and Minchella 1998, Sandland and Minchella 2003, Ebert 2005. We quantified how pathogen effects on host reproduction respond to changes in elemental food quality.…”

Section: Resultsmentioning

confidence: 99%

Responses of a Bacterial Pathogen to Phosphorus Limitation of Its Aquatic Invertebrate Host

Frost

Ebert

Smith

2008

Ecology

107

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Abstract. Host nutrition is thought to affect the establishment, persistence, and severity of pathogenic infections. Nutrient-deficient foods possibly benefit pathogens by constraining host immune function or benefit hosts by limiting parasite growth and reproduction. However, the effects of poor elemental food quality on a host's susceptibility to infection and disease have received little study. Here we show that the bacterial microparasite Pasteuria ramosa is affected by the elemental nutrition of its aquatic invertebrate host, Daphnia magna. We found that high food carbon : phosphorus (C:P) ratios significantly reduced infection rates of Pasteuria in Daphnia and led to lower within-host pathogen multiplication. In addition, greater virulent effects of bacterial infection on host reproduction were found in Daphniaconsuming P-deficient food. Poor Daphnia elemental nutrition thus reduced the growth and reproduction of its bacterial parasite, Pasteuria. The effects of poor host nutrition on the pathogen were further evidenced by Pasteuria's greater inhibition of reproduction in P-limited Daphnia. Our results provide strong evidence that elemental food quality can significantly influence the incidence and intensity of infectious disease in invertebrate hosts.

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Effects of diet and Echinostoma revolutum infection on energy allocation patterns in juvenile Lymnaea elodes snails

Cited by 69 publications

References 53 publications

Seasonal Transmission of Opisthorchis viverrini sensu lato and a Lecithodendriid Trematode Species in Bithynia siamensis goniomphalos Snails in Northeast Thailand

Seasonal Transmission of Opisthorchis viverrini sensu lato and a Lecithodendriid Trematode Species in Bithynia siamensis goniomphalos Snails in Northeast Thailand

Aquatic eutrophication promotes pathogenic infection in amphibians

Responses of a Bacterial Pathogen to Phosphorus Limitation of Its Aquatic Invertebrate Host

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