associations between malaria and mhc genes in a migratory songbird.malaria parasites are a widespread and species-rich group infecting many wild populations of mammals, birds and reptiles. studies on humans have demonstrated that genetic factors play a key role in the susceptibility and outcome of malaria infections. until the present study, it has not been examined whether genetic variation in hosts is important for the outcome of malaria infections in natural avian populations. we investigated associations between major histocompatibility complex (mhc) genes ...200516011927
dynamics of parasitemia of malaria parasites in a naturally and experimentally infected migratory songbird, the great reed warbler acrocephalus arundinaceus.little is known about the development of infection of malaria parasites of the genus plasmodium in wild birds. we used qpcr, targeting specific mitochondrial lineages of plasmodium ashfordi (grw2) and plasmodium relictum (grw4), to monitor changes in intensities of parasitemia in captive great reed warblers acrocephalus arundinaceus from summer to spring. the study involved both naturally infected adults and experimentally infected juveniles. the experiment demonstrated that p. ashfordi and p. r ...200818280472
linkage between mitochondrial cytochrome b lineages and morphospecies of two avian malaria parasites, with a description of plasmodium (novyella) ashfordi sp. nov.numerous lineages of avian malaria parasites of the genus plasmodium have been deposited in genbank. however, only seven morphospecies have been linked to these lineages. this study linked two molecular sequences with morphospecies of malaria parasites. two species of plasmodium (mitochondrial cytochrome b gene lineages p-grw2 and p-grw4) were isolated from naturally infected adult great reed warblers (acrocephalus arundinaceus) and inoculated to naive juvenile individuals of the same host speci ...200717235548
quantitative disease resistance: to better understand parasite-mediated selection on major histocompatibility complex.we outline a descriptive framework of how candidate alleles of the immune system associate with infectious diseases in natural populations of animals. three kinds of alleles can be separated when both prevalence of infection and infection intensity are measured-qualitative disease resistance, quantitative disease resistance and susceptibility alleles. our descriptive framework demonstrates why alleles for quantitative resistance and susceptibility cannot be separated based on prevalence data alo ...201121733902
primary peak and chronic malaria infection levels are correlated in experimentally infected great reed warblers.malaria parasites often manage to maintain an infection for several months or years in their vertebrate hosts. in humans, rodents and birds, most of the fitness costs associated with malaria infections are in the short initial primary (high parasitaemia) phase of the infection, whereas the chronic phase (low parasitaemia) is more benign to the host. in wild birds, malaria parasites have mainly been studied during the chronic phase of the infection. this is because the initial primary phase of in ...201222716664
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