Related Experiment Video
Updated: Mar 29, 2026
09:24
Studying Inherited Immunity in a Caenorhabditis elegans Model of Microsporidia Infection
Published on: April 6, 2022
2.9K
Genomic changes during evolution of animal parasitism in eukaryotes
1Department of Functional and Comparative Genomics, The University of Liverpool, Biosciences Building, Crown Street, Liverpool L69 7ZB, UK.
Current Opinion in Genetics & Development
|December 7, 2015
Summary
Comparative genomics aids understanding pathogen evolution and host interactions. Analyzing multiple pathogen genomes reveals genomic changes driving pathogenicity and parasitism.
Area of Science:
- Microbiology
- Evolutionary Biology
- Genomics
Background:
- Host-pathogen interactions are crucial for understanding infectious diseases.
- Evolutionary adaptations enable pathogens to thrive within hosts.
Purpose of the Study:
- To explore pathogen evolution using comparative genomics.
- To identify genomic mechanisms underlying pathogenicity and parasitism.
Main Methods:
- Comparative genomic analysis of multiple pathogen species and strains.
- Reconstitution of evolutionary processes at the genomic level.
Main Results:
- Genome sequence data facilitates organism comparison.
- Evolutionary trajectories leading to pathogenic traits can be reconstructed.
Conclusions:
- Comparative genomics is a powerful approach to study host-pathogen co-evolution.
- Genomic insights illuminate the development of pathogen virulence and parasitic strategies.
Related Concept Videos
01:22Microbial Interactions: Parasitism
51
Parasitism is a form of microbial interaction in which parasitic microbes exploit a host organism for nutrients and shelter, often at the host's expense. Unlike mutualistic relationships, where both organisms benefit, parasitism benefits only the parasite and harms the host.Classification of ParasitesMicrobial parasites are broadly classified based on their location relative to the host.Ectoparasites remain on the host’s surface, such as the skin or outer tissues, drawing nutrients...
51
01:15Diversity of Protists I
2.2K
Excavata is a diverse group of protists that includes both chemoorganotrophic and phototrophic species, with some thriving in anaerobic environments. Among the key groups within Excavata are diplomonads and parabasalids, which are flagellated protists that lack mitochondria and chloroplasts. These microorganisms typically inhabit anoxic environments, such as the intestines of animals, where they exist either symbiotically or as parasites, relying on fermentation for energy production. Some...
2.2K
01:24Eukaryotic Evolution
43.6K
The endosymbiont theory is the most widely accepted theory of eukaryotic evolution; however, its progression is still somewhat debated. According to the nucleus-first hypothesis, the ancestral prokaryote first evolved a membrane to enclose DNA and form the nucleus. Conversely, the mitochondria-first hypothesis suggests that the nucleus was formed after endosymbiosis of mitochondria.
Contrary to the endosymbiont theory, the eukaryote-first hypothesis proposes that the simpler prokaryotic and...
Contrary to the endosymbiont theory, the eukaryote-first hypothesis proposes that the simpler prokaryotic and...
43.6K
01:08Evolution of Microbial Genome
45
Microbial genome evolution is a highly dynamic process shaped by continual gene gain and loss across species and strains. This genomic flexibility allows microorganisms to adapt rapidly to environmental pressures and interactions with other organisms. Central to understanding this diversity is the distinction between the core and pan genomes.The core genome comprises the genes shared by all sampled strains of a species, representing essential functions needed for fundamental cellular processes.
45
01:24Evolution of New Traits in Microbes
97
Microorganisms evolve rapidly due to their large population sizes and short generation times, often exhibiting measurable changes within days under laboratory conditions. Natural selection acts on standing genetic variation, enabling the retention and amplification of beneficial traits that confer fitness advantages in changing environments.Adaptive Pigment Regulation in RhodobacterIn Rhodobacter, a genus of purple non-sulfur bacteria, light-harvesting pigments such as bacteriochlorophyll and...
97
03:21Genome Size and the Evolution of New Genes
9.4K
While every living organism has a genome of some kind (be it RNA, or DNA), there is considerable variation in the sizes of these blueprints. One major factor that impacts genome size is whether the organism is prokaryotic or eukaryotic. In prokaryotes, the genome contains little to no non-coding sequence, such that genes are tightly clustered in groups or operons sequentially along the chromosome. Conversely, the genes in eukaryotes are punctuated by long stretches of non-coding sequence.
9.4K