The effects of temperature change on the infection rate of Biomphalaria glabrata with Schistosoma mansoni

Coelho, João Rodrigues; Bezerra, Fernando Schemelzer de Moraes

doi:10.1590/s0074-02762006000200016

Cited by 20 publications

(9 citation statements)

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“…Indeed, in schistosome-snail interactions, temperature directly influences the development and several life history traits of the schistosome with optimal trait values observed around 25 °C [39]. Below this optimal temperature, the ability of miracidia to infect their host snails decreases [40–43], the length of the prepatent period increases [34, 41, 42, 44] and the number of cercariae emitted decreases [34, 41, 42, 44]. Our study shows that at 4 °C, 8 °C and 16 °C, the mortality of snails either infected or not does not differ significantly.…”

Section: Discussionmentioning

confidence: 99%

Persistent establishment of a tropical disease in Europe: the preadaptation of schistosomes to overwinter

et al. 2019

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Background Global changes promote the spread of infectious diseases worldwide. In this context, tropical urogenital schistosomiasis is now permanently established in Corsica since its first emergence in 2013. The local persistence of the tropical pathogens (schistosomes) responsible for urogenital schistosomiasis at such latitudes might be explained by (i) the presence of its intermediate host, the snail Bulinus truncatus , (ii) the recurrent local reseeding of schistosomes by their vertebrate hosts (either human or animal) every summer, and/or (iii) the maintenance and survival of schistosomes within their snail hosts over winter. Methods In this study we conducted an ecological experiment to assess the ability of temperate and tropical schistosome strains to survive in classical winter temperatures in Corsican rivers when infecting temperate (local) snail strains. We also quantified the ability of the schistosomes to complete their life-cycle post-overwintering when returned to classical summer water temperatures. Results Our results show that Mediterranean molluscs are locally adapted to winter conditions compared to tropical molluscs. Moreover, temperate and tropical schistosome strains equally survived the cold and produced viable offspring when returned to optimal temperatures. These results indicate that schistosomes can overwinter under temperate climates when infecting locally adapted snails and might partly explain the establishment and maintenance of schistosomes in Corsica from year to year. Conclusions The observed broader thermal range of schistosomes compared to that of their snail hosts was unexpected and clearly indicates that the spread and establishment of schistosomiasis in temperate countries relies primarily on the presence of the locally adapted snail host lineages, currently known to be present in France, Italy, Portugal, Spain and Greece.

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Section: Discussionmentioning

confidence: 99%

Persistent establishment of a tropical disease in Europe: the preadaptation of schistosomes to overwinter

et al. 2019

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“…The compatibility observed on the Biomphalaria/ Schistosoma relationship is highly specific and environmental factors are important in the development of the trematode on the intramollusc phase (Webbe, 1967). Climatic variations, especially those related to temperature, have a direct relationship with the mollusc infection rate (Wagner and Moore, 1959;Coelho and Bezerra, 2006;McCreesh et al, 2014).…”

Section: Discussionmentioning

confidence: 99%

Assessment of the impact of changes in temperature in Biomphalaria glabrata (Say, 1818) melanic and albino variants infected with Schistosoma mansoni (Sambon, 1907)

Camargo

Neves

et al. 2016

Braz. J. Biol.

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Fluctuations in population density of planorbid hosts of S. mansoni are influenced by climatic factors. The knowledge about interference from changes in water temperature in these populations is an important aspect of the epidemiology of schistosomiasis. In this experiment, it is explored the influence of different temperatures on the development of Schistosoma mansoni in Biomphalaria glabrata melanic and albino variants. The results indicated an intrinsic relationship between temperature and development of the parasite in the intramollusc phase, independent of the pigmentation of the mantle of the molluscs. The higher the temperature, the shorter the period necessary for the development of the parasite was while the higher the mortality of infected mollusks. It is concluded that, in the presence of climate change, the increasement of temperature in cold and flooded regions may encourage the establishment of new foci of transmission of schistosomiasis by changing the geographic extent and extending the epidemiological transmission potential. In warm climates, higher temperatures, however, could compromise the transmission of the disease because of biological stress suffered by parasite and host. Under these conditions, it can result in the death of the parasite or a change in their ability to infect new host species of molluscs in new areas. Mantle pigmentation patterns in molluscs have not shown significant interference in the development of the parasite.

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“…As temperature decreases, rates of foraging, population increase, and interspecific interactions may decline, thus allowing more species to coexist on a given amount of resources. In support, authors of several experimental studies have shown that lower temperatures decrease rates of food intake, predation, parasitism, and competitive replacement (reviewed in Brown et al 2004; also see Dreisig 1981, Bailey 1989, Shipp et al 1996, Sanford 2002, Soares et al 2003, Coelho and Bezerra 2006, Rall et al 2010 and stabilize predator-prey interactions (Beisner et al 1997, but see Rall et al 2010. As a result, lower temperatures should reduce competitive exclusion and predatory and parasitic mortality, thereby potentially increasing the number of species populations that can survive in a community (cf.…”

Section: ]mentioning

confidence: 94%

Temperature affects food-chain length and macroinvertebrate species richness in spring ecosystems

Glazier

2012

Freshwater Science

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The effects of temperature change on the infection rate of Biomphalaria glabrata with Schistosoma mansoni

Cited by 20 publications

References 4 publications

Persistent establishment of a tropical disease in Europe: the preadaptation of schistosomes to overwinter

Persistent establishment of a tropical disease in Europe: the preadaptation of schistosomes to overwinter

Assessment of the impact of changes in temperature in Biomphalaria glabrata (Say, 1818) melanic and albino variants infected with Schistosoma mansoni (Sambon, 1907)

Temperature affects food-chain length and macroinvertebrate species richness in spring ecosystems

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