The genetic basis of resistance and matching-allele interactions of a host-parasite system: The Daphnia magna-Pasteuria ramosa model [PDF]
PLoS Genetics, 2017 Negative frequency-dependent selection (NFDS) is an evolutionary mechanism suggested to govern host-parasite coevolution and the maintenance of genetic diversity at host resistance loci, such as the vertebrate MHC and R-genes in plants.
Yann Bourgeois +2 more
exaly +5 more sources
Imaging flow cytometry enables label-free cell sorting of morphological variants from populations of the unculturable bacterium Pasteuria ramosa [PDF]
MSphereBacterial populations often display remarkable morphological heterogeneity. Fluorescence-activated cell sorting (FACS) is an important tool for understanding this diversity. FACs allows researchers to obtain pure samples of each morphological variant (or
Nina Wale
exaly +4 more sources
The parasites of my rival are my friends [PDF]
Frontiers in Microbiology, 2023 The competitive exclusion principle asserts that two species cannot stably coexist in the same habitat. However, the presence of a parasite can facilitate temporary coexistence between two host species occupying the same habitat.
Sigal Orlansky, Frida Ben-Ami
doaj +2 more sources
QTL study reveals candidate genes underlying host resistance in a Red Queen model system. [PDF]
PLoS Genetics, 2023 Specific interactions of host and parasite genotypes can lead to balancing selection, maintaining genetic diversity within populations. In order to understand the drivers of such specific coevolution, it is necessary to identify the molecular ...
Maridel Fredericksen +4 more
doaj +2 more sources
Temperature Alters Specificity in a Host-Parasite Interaction. [PDF]
Ecol EvolThe Red Queen Hypothesis predicts that host–parasite coevolution maintains genetic variation through strong genetic specificity, but this specificity may be sensitive to environmental conditions. Using Meloidogyne arenaria and its parasite Pasteuria penetrans, we tested host–parasite interactions across three temperatures and found specificity at two ...
Ramirez A, Gibson A.
europepmc +2 more sources
Ectopical expression of bacterial collagen-like protein supports its role as adhesin in host–parasite coevolution [PDF]
Royal Society Open ScienceFor a profound understanding of antagonistic coevolution, it is necessary to identify the coevolving genes. The bacterium Pasteuria and its host, the microcrustacean Daphnia, are a well-characterized paradigm for co-evolution, but the underlying genes ...
Benjamin Huessy +2 more
doaj +2 more sources
Transcriptomic Landscape Reveals Immunity Related Trade-Offs in an Invertebrate-Fungal Host-Parasite System. [PDF]
Mol EcolABSTRACT Host–parasite interactions represent an evolutionary arms race, with parasites evolving strategies to exploit host resources, and hosts deploying mechanisms to resist or tolerate infection. Unlike vertebrates, which possess a sophisticated immune system, invertebrates rely entirely on innate immunity to combat pathogens.
Paraskevopoulou S, Gattis S, Ben-Ami F.
europepmc +2 more sources
A common multi-host parasite shows genetic structuring at the host species and population levels [PDF]
ParasitologyAlthough individual parasite species commonly infect many populations across physical space as well as multiple host species, the extent to which parasites traverse physical and phylogenetic distances is unclear.
Clara L. Shaw +2 more
doaj +2 more sources
Integrating infection intensity and aggregation into the dynamics of pathogens with within-host replication. [PDF]
J Anim EcolWe bridge micro‐ and macroparasite theory with a model tracking pathogen load heterogeneity. By incorporating load‐dependent mortality and within‐host pathogen growth, we show how pathogen load aggregation alters disease prevalence, host suppression effects, and virulence evolution, providing insights for managing complex infectious disease like ...
Sun R, Walsman JC, Wilber M, Briggs CJ.
europepmc +2 more sources
Evaluating host diet effects on microparasites by measuring the stoichiometry of infrapopulations one cell at a time. [PDF]
Ecol EvolThe challenges of accurately measuring the nutrient content of parasites within hosts has limited our ability to rigorously apply ecological stoichiometry to host–parasite systems. Here, we explain how energy dispersive technology, a technique currently used to measure the elemental content of individual free‐living microbes, can be adapted for ...
Narr CF +7 more
europepmc +2 more sources