Related Experiment Video
Updated: Dec 30, 2025
07:10
A Fluorescence-based Method to Study Bacterial Gene Regulation in Infected Tissues
Published on: February 19, 2019
9.4K
The Evolutionary Genomics of Host Specificity in Staphylococcus aureus
Marta Matuszewska1, Gemma G R Murray1, Ewan M Harrison2
1Department of Veterinary Medicine, University of Cambridge, Cambridge, CB3 0ES, UK.
Trends in Microbiology
|January 18, 2020
Summary
Staphylococcus aureus frequently jumps between animal hosts, acquiring specific genes that enable adaptation. Understanding this bacterial pathogen
Area of Science:
- Microbiology
- Genomics
- Epidemiology
Background:
- Staphylococcus aureus is a significant bacterial pathogen with a wide host range.
- This pathogen has a history of host-species jumps throughout its evolution.
- Gene acquisition and loss, particularly on mobile genetic elements, drive S. aureus adaptation.
Purpose of the Study:
- To investigate the evolutionary dynamics of Staphylococcus aureus host specificity.
- To understand the role of adaptive genes in S. aureus host jumps.
- To identify potential risks associated with S. aureus diversity in animal populations.
Main Methods:
- Genomic analysis of S. aureus strains.
- Epidemiological studies to track host-species transmission.
- Analysis of mobile genetic elements and adaptive genes.
Main Results:
- Genomic and epidemiological data reveal frequent host jumps by S. aureus.
- Specific adaptive genes are consistently gained during jumps into particular species.
- Mobile genetic elements facilitate the dynamic gain and loss of these genes.
Conclusions:
- Further exploration of animal species will likely reveal greater S. aureus diversity and host range.
- Understanding S. aureus host specificity is crucial for mitigating risks of emergent strains in humans and livestock.
Related Concept Videos
01:29Modern Molecular Taxonomy
513
Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...
513
03:21Genome Size and the Evolution of New Genes
8.9K
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.
8.9K
01:31Defense Against Bacterial Pathogens
2.5K
The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
2.5K
01:16Transduction
1.0K
Among the three main modes of HGT—transformation, conjugation, and transduction—transduction is unique in that it is mediated by bacteriophages, or bacterial viruses.Transduction occurs in two ways. Generalized transduction occurs during the lytic cycle of a bacteriophage infection. In this process, bacteriophages infect bacterial cells, replicate within them, and ultimately cause cell lysis, releasing newly assembled virions. Occasionally, random fragments of the bacterial genome...
1.0K
02:54Evolutionary Relationships through Genome Comparisons
6.8K
Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
6.8K
02:05Gene Evolution - Fast or Slow?
7.9K
The genomes of eukaryotes are punctuated by long stretches of sequence which do not code for proteins or RNAs. Although some of these regions do contain crucial regulatory sequences, the vast majority of this DNA serves no known function. Typically, these regions of the genome are the ones in which the fastest change, in evolutionary terms, is observed, because there is typically little to no selection pressure acting on these regions to preserve their sequences.
In contrast, regions which code...
In contrast, regions which code...
7.9K