Simone Sommer results 28
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Immunogenetics, sylvatic plague and its vectors: insights from the pathogen reservoir Mastomys natalensis in TanzaniaNARA Subscribed
Yersinia pestis is a historically important vector-borne pathogen causing plague in humans and other mammals. Contemporary zoonotic infections with Y. pestis still occur in sub-Saharan Africa, including Tanzania and Madagascar, but receive relatively little attention. Thus, the role of wildlife reservoirs in maintaining sylvatic plague and spillover risks to humans is largely unknown. The multimammate rodent Mastomys natalensi...
Climate change drives loss of bacterial gut mutualists at the expense of host survival in wild meerkatsNARA Subscribed
Climate change and climate‐driven increases in infectious disease threaten wildlife populations globally. Gut microbial responses are predicted to either buffer or exacerbate the negative impacts of these twin pressures on host populations. However, examples that document how gut microbial communities respond to long‐term shifts in climate and associated disease risk, and the consequences for host survival, are rare. Over the...
MHC class II genes mediate susceptibility and resistance to coronavirus infections in batsNARA Subscribed
Understanding the immunogenetic basis of coronavirus (CoV) susceptibility in major pathogen reservoirs, such as bats, is central to inferring their zoonotic potential. Members of the cryptic Hipposideros bat species complex differ in CoV susceptibility, but the underlying mechanisms remain unclear. The genes of the major histocompatibility complex (MHC) are the best understood genetic basis of pathogen resistance, and differen...
Egg microbiota is the starting point of hatchling gut microbiota in the endangered yellow‐spotted Amazon river turtleNARA Subscribed
Establishment and development of gut microbiota during vertebrates' early life are likely to be important predictors of health and fitness. Host‐parental and host‐environment interactions are essential to these processes. In oviparous reptiles whose nests represent a source of the parent's microbial inocula, the relative role of host‐selection and stochastic environmental factors during gut microbial assemblage remains unknown...
Interaction between MHC diversity and constitution, gut microbiota and Astrovirus infections in a neotropical batNARA Subscribed
Astroviruses (AstVs) infect numerous mammalian species including reservoirs such as bats. Peptides encoded by the genes of the highly polymorphic Major Histocompatibility Complex (MHC) form the first line of host defence against pathogens. Aside from direct involvement in mounting adaptive immune responses, MHC class II genes are hypothesized to regulate gut commensal diversity and shape the production of immune‐modulatory sub...
Gut microbiomes of free‐ranging and captive Namibian cheetahs: Diversity, putative functions and occurrence of potential pathogensNARA Subscribed
Although the significance of the gut microbiome for host health is well acknowledged, the impact of host traits and environmental factors on the interindividual variation of gut microbiomes of wildlife species is not well understood. Such information is essential; however, as changes in the composition of these microbial communities beyond the natural range might cause dysbiosis leading to increased susceptibility to infection...
Resistance to RHD virus in wild Australian rabbits: Comparison of susceptible and resistant individuals using a genomewide approachNARA Subscribed
Deciphering the genes involved in disease resistance is essential if we are to understand host–pathogen coevolutionary processes. The rabbit haemorrhagic disease virus ( RHDV ) was imported into Australia in 1995 as a biocontrol agent to manage one of the most successful and devastating invasive species, the European rabbit ( Oryctolagus cuniculus ). During the first outbreaks of the disease, RHDV caused mortality rates of up...
Sexual selection involving genetically disassortative mate choice is one of several evolutionary processes that can maintain or enhance population genetic variability. Examples of reproductive systems in which choosers (generally females) select mates depending on their major histocompatibility complex ( MHC ) genes have been reported for several vertebrate species. Notably, the role of MHC ‐dependent choice not in mating cont...