Virulence is context-dependent in a vertically transmitted aquatic host–microparasite system

Ryan, Julie A.; Kohler, Steven L.

doi:10.1016/j.ijpara.2010.07.004

Cited by 21 publications

(20 citation statements)

References 64 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…), especially given that a mixed parasite strain cocktail was given to the bees, which reduces the possibility of non-establishment due to specific host-parasite genotype × genotype interactions (Sadd & Barribeau, 2013). Parasite impacts on host survival and fitness under stressful conditions have been demonstrated in this and other systems (Schaub & Losch, 1989;Jaenike et al, 1995;Brown et al, 2000;Bedhomme et al, 2005;Ryan & Kohler, 2010), but this case of reduced hibernation survival of C. bombi-exposed individuals is perhaps surprising. A previous study in the same host species showed no impact of infection on hibernation survival, only on colony founding (Brown et al, 2003).…”

Section: Discussionmentioning

confidence: 95%

Neonicotinoids override a parasite exposure impact on hibernation success of a key bumblebee pollinator

Fauser

Sandrock

Neumann

et al. 2017

Ecological Entomology

View full text Add to dashboard Cite

Abstract. 1. Seasonal adaptations enabling the bridging of periodic challenging abiotic conditions are taxonomically widespread. However, sensitivity to other environmental stresses can be heightened during these periods.2. Several temperate insects with over-wintering strategies play key ecosystem and economic roles, including wild bee pollinators. For example, hibernation survival in temperate bumblebees is crucial, as only new queens of future social colonies over-winter. These bees are also faced with other abiotic and biotic stressors, some of which have been linked to recent pollinator declines, such as exposure to pesticides and parasites.3. Using a fully crossed experiment, the influence of dietary exposure to neonicotinoid insecticides (thiamethoxam and clothianidin) and/or the prevalent bumblebee parasite Crithidia bombi on hibernation survival and hibernation weight change of Bombus terrestris bumblebee queens was investigated.4. Both neonicotinoid and C. bombi exposures reduced hibernation success individually, but no additive or synergistic effects between the stressors were found. Further, effects were asynchronous, with early neonicotinoid effects on hibernation mortality overriding later parasite effects under combined exposures. Neonicotinoid exposure also increased hibernation weight loss of surviving queens.5. Diapause periods, employed by numerous temperate organisms, are likely to be especially vulnerable to environmental stresses, besides the seasonal challenge for which these periods are an adaptation. Thus, diapause requires inclusion during the consideration of the impacts of such stresses. Accordingly, it is demonstrated here that naturally relevant exposures of pesticides and parasites have important detrimental effects on bumblebees during a critical hibernation period, with potential consequences for populations of these key wild pollinators.

show abstract

Section: Discussionmentioning

confidence: 95%

Neonicotinoids override a parasite exposure impact on hibernation success of a key bumblebee pollinator

Fauser

Sandrock

Neumann

et al. 2017

Ecological Entomology

View full text Add to dashboard Cite

show abstract

“…local adaptation) and genetics (e.g. paralogs, hybridization) could be contributing to the varying levels of rDNA divergence seen in these Glugea (Brown et al 2010a, Ryan & Kohler 2010. However, we cannot rule out that this is a group of species for which rDNA genes are insufficient to resolve individual species (Docker et al 1997b).…”

Section: Discussionmentioning

confidence: 93%

“…microsporidian. Previous research has shown that morphologically similar microsporidians may not be identical when DNA sequences are examined (Ironside et al 2003, Haine et al 2004, Ryan & Kohler 2010. Therefore, we sequenced the rRNA genes from 2 additional infected mottled sculpin populations from Michigan (Augusta Creek and Wilder Creek) in the same manner as above.…”

Section: Molecular Identificationmentioning

confidence: 99%

See 1 more Smart Citation

Distribution, prevalence, and pathology of a microsporidian infecting freshwater sculpins

Ryan

Kohler²

2016

Dis. Aquat. Org.

View full text Add to dashboard Cite

Microsporidian infections are common in many fish species, yet detailed studies of these parasites in ecologically important wild populations are rare. Phylogenetic analysis using rDNA sequence data and parasite morphology indicate that mottled sculpin Cottus bairdii and slimy sculpin C. cognatus are hosts for Glugea sp. microsporidia in the northern USA. Glugea sp. is common in the Michigan populations sampled for this study, and prevalence was ≥70% in 4 of 6 infected populations (range ~4 to 80%). Glugea sp. infection causes the formation of xenomas associated with the body wall, fat body, gonads, and kidneys. Infections range from mild to very heavy, with variable xenoma numbers and sizes. Female sculpin experience heavier infections and more frequent infection of the gonads relative to males. Glugea sp. is transmitted horizontally between hosts through ingestion of spores. Vertical transmission may also be possible, either by spores infecting eggs directly or by spores contaminating the surface of eggs in the ovary or in the nest. The frequency and route of vertical transmission requires further study, but if it occurs, it may partly explain the high prevalence of infection. Our study combined with previous research suggests that additional molecular data and cross-infection experiments should be conducted to clarify species designations in the genus Glugea.

show abstract

“…They can be transmitted vertically within the host population (transovarially, from female to offspring) or horizontally (transmission through consumption of infected tissue) causing microsporidiosis (Dunn and Rigaud, 1998;Dunn et al, 2001;Haine et al, 2004) which may be lethal Ryan and Kohler, 2010;Stentiford et al, 2013). Nevertheless, some parasite species employ a mixed strategy for transmission (Vizoso and Ebert, 2004).…”

Section: Introductionmentioning

confidence: 99%

Enhanced fecundity and parasite release in the first amphipod invader on the Iberian Peninsula

Banha

Anastácio

Rachalewski

et al. 2018

Knowl. Manag. Aquat. Ecosyst.

View full text Add to dashboard Cite

show abstract

Virulence is context-dependent in a vertically transmitted aquatic host–microparasite system

Cited by 21 publications

References 64 publications

Neonicotinoids override a parasite exposure impact on hibernation success of a key bumblebee pollinator

Neonicotinoids override a parasite exposure impact on hibernation success of a key bumblebee pollinator

Distribution, prevalence, and pathology of a microsporidian infecting freshwater sculpins

Enhanced fecundity and parasite release in the first amphipod invader on the Iberian Peninsula

Contact Info

Product

Resources

About