نتایج جستجو برای: parasite diversity
تعداد نتایج: 225774 فیلتر نتایج به سال:
Host-parasite co-evolutionary studies can shed light on diversity and the processes that shape it. Molecular methods have proven to be an indispensable tool in this task, often uncovering unseen diversity. This study used two nuclear markers (18S rRNA and 28S rRNA) and one mitochondrial (cytochrome oxidase subunit I) marker to investigate the diversity of nematodes of the family Pharyngodonidae...
Insects and parasites dominate the biosphere, in terms of known biodiversity mode life, respectively. Consequently, insects play a part many host-parasite systems, either as parasite, host, or both. Moreover, lot these systems involve adaptive parasite-induced changes host phenotype (typically behavior morphology), which is commonly manipulation. While manipulation have been described within la...
Plasmodium vivax is the most prevalent human malaria parasite in the Americas. Previous studies have contrasted the genetic diversity of parasite populations in the Americas with those in Asia and Oceania, concluding that New World populations exhibit low genetic diversity consistent with a recent introduction. Here we used an expanded sample of complete mitochondrial genome sequences to invest...
Polyandry is often difficult to explain because benefits of the behaviour have proved elusive. In social insects, polyandry increases the genetic diversity of workers within a colony and this has been suggested to improve the resistance of the colony to disease. Here we examine the possible impact of host genetic diversity on parasite evolution by carrying out serial passages of a virulent fung...
hymenolepis nana is a common parasite of rodents as well as human intestine. this parasite has beenreported from all over the world, including iran. the infection rate has been reported up to 40% in someareas. the infection has various clinical manifestations. the parasite could establish severe hyperinfection inpatients with immune deficiency. regarding the rodents as hosts of the parasite, th...
BACKGROUND Chagas disease results from infection with the diploid protozoan parasite Trypanosoma cruzi. T. cruzi is highly genetically diverse, and multiclonal infections in individual hosts are common, but little studied. In this study, we explore T. cruzi infection multiclonality in the context of age, sex and clinical profile among a cohort of chronic patients, as well as paired congenital c...
Lake Tanganyika is well-known for its high species-richness and rapid radiation processes. Its assemblage of cichlid fishes recently gained momentum as a framework to study parasite ecology and evolution. It offers a rare chance to investigate the influence of a deepwater lifestyle in a freshwater fish-parasite system. Our study represents the first investigation of parasite intraspecific genet...
A vast theoretical literature has explored the evolutionary dynamics of parasite virulence. The classic result from this modelling work is that, assuming a saturating transmission-virulence trade-off, there is a single evolutionary optimum where the parasite optimizes the epidemiological R 0. However, there are an increasing number of models that have shown how ecological and epidemiological fe...
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