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Related Concept Videos

Evolutionary Processes in Microbes01:26

Evolutionary Processes in Microbes

Microbial evolution occurs rapidly due to short generation times and a variety of genetic processes, including horizontal gene transfer, mutation, recombination, and genetic drift. These mechanisms collectively enable microbes to adapt swiftly to changing environments.Horizontal gene transfer (HGT) allows genes to move between different species and occurs through three main mechanisms: conjugation, transformation, and transduction. Conjugation involves direct cell-to-cell contact for DNA...
Evolution of New Traits in Microbes01:24

Evolution of New Traits in Microbes

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...
Evolution of Microbial Genome01:08

Evolution of Microbial Genome

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.
Viral Mutations00:36

Viral Mutations

A mutation is a change in the sequence of bases of DNA or RNA in a genome. Some mutations occur during replication of the genome due to errors made by the polymerase enzymes that replicate DNA or RNA. Unlike DNA polymerase, RNA polymerase is prone to errors because it is not capable of “proofreading” its work. Viruses with RNA-based genomes, like HIV, therefore accrue mutations faster than viruses with DNA-based genomes. Because mutation and recombination provide the raw material for adaptive...
Mutations in Microorganisms01:18

Mutations in Microorganisms

Mutations are heritable changes in an organism’s genome involving alterations in the base sequence of DNA or RNA. These changes can influence cellular processes and phenotypic traits, potentially transforming the unaltered wild type into a mutant form. Such changes, termed forward mutations, are pivotal in shaping the genetic diversity of organisms.RNA viruses exhibit the highest mutation rates due to the absence of robust proofreading mechanisms during genome replication. In contrast,...
Gene Evolution - Fast or Slow?02:05

Gene Evolution - Fast or Slow?

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...

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Updated: Jun 14, 2026

Following the Dynamics of Structural Variants in Experimentally Evolved Populations
04:52

Following the Dynamics of Structural Variants in Experimentally Evolved Populations

Published on: February 3, 2023

Pathogen microevolution in high resolution.

Ramy K Aziz1, Victor Nizet

  • 1Department of Microbiology and Immunology, Faculty of Pharmacy, Cairo University, Cairo 11562, Egypt. ramy.aziz@salmonella.org

Science Translational Medicine
|April 8, 2010
PubMed
Summary
This summary is machine-generated.

Next-generation sequencing enhances the study of microbial genomics, aiding in tracking antibiotic-resistant Staphylococcus aureus. This technology reveals pathogen origins and spread, crucial for public health.

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Last Updated: Jun 14, 2026

Following the Dynamics of Structural Variants in Experimentally Evolved Populations
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Area of Science:

  • Microbial genomics
  • Infectious disease epidemiology
  • Public health microbiology

Background:

  • Antibiotic-resistant Staphylococcus aureus poses a significant global health threat.
  • Conventional genotyping lacks resolution for closely related microbial strains.
  • Tracking emerging biological threats requires advanced genomic tools.

Purpose of the Study:

  • To explore the utility of next-generation genotyping for microbial strain analysis.
  • To investigate the geographical origin and spread of resistant Staphylococcus aureus.
  • To address hypotheses concerning microbial evolution and virulence.

Main Methods:

  • Application of next-generation high-throughput genotyping technologies.
  • Genomic analysis of a highly resistant Staphylococcus aureus strain.
  • Comparative genomics for strain resolution.

Main Results:

  • Next-generation sequencing provides high resolution for microbial strain differentiation.
  • Genomic data offered insights into the geographical origins of the pathogen.
  • The study illustrated the potential for tracking intrahospital spread.

Conclusions:

  • Advanced microbial genomics is essential for understanding and controlling infectious diseases.
  • High-throughput genotyping offers powerful insights into pathogen evolution and dissemination.
  • Genomic surveillance is critical for managing public health challenges like antibiotic resistance.