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Related Concept Videos

Modern Molecular Taxonomy01:29

Modern Molecular Taxonomy

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...
Genomics02:02

Genomics

Genomics is the science of genomes: it is the study of all the genetic material of an organism. In humans, the genome consists of information carried in 23 pairs of chromosomes in the nucleus, as well as mitochondrial DNA. In genomics, both coding and non-coding DNA is sequenced and analyzed. Genomics allows a better understanding of all living things, their evolution, and their diversity. It has a myriad of uses: for example, to build phylogenetic trees, to improve productivity and...
Evolutionary Relationships through Genome Comparisons02:54

Evolutionary Relationships through Genome Comparisons

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...
Applications of Molecular Taxonomy01:20

Applications of Molecular Taxonomy

Molecular taxonomy has revolutionized the understanding and classification of bacteria, providing precise insights into their diversity, evolutionary relationships, and ecological roles. By utilizing molecular techniques such as DNA sequencing and fingerprinting, researchers have made significant strides in various fields related to bacterial studies.Resolving Taxonomic AmbiguitiesMolecular taxonomy has been instrumental in distinguishing closely related bacterial species initially thought to...
Genomic DNA in Prokaryotes00:46

Genomic DNA in Prokaryotes

The genome of most prokaryotic organisms consists of double-stranded DNA organized into one circular chromosome in a region of cytoplasm called the nucleoid. The chromosome is tightly wound, or supercoiled, for efficient storage. Prokaryotes also contain other circular pieces of DNA called plasmids. These plasmids are smaller than the chromosome and often carry genes that confer adaptive functions, such as antibiotic resistance.
Genomic Diversity in Bacteria
Although bacterial genomes are much...
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.

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Related Experiment Video

Updated: May 8, 2026

Generating Whole Bacterial Genomes from Clinical Samples using a Target Enrichment Workflow
10:44

Generating Whole Bacterial Genomes from Clinical Samples using a Target Enrichment Workflow

Published on: August 15, 2025

The need for high-quality whole-genome sequence databases in microbial forensics.

Andreas Sjödin, Tina Broman, Öjar Melefors

    Biosecurity and Bioterrorism : Biodefense Strategy, Practice, and Science
    |August 27, 2013
    PubMed
    Summary

    Microbial forensics uses whole-genome sequencing to identify pathogens in bioterrorism cases. High-quality reference databases are crucial for accurate attribution and prosecution.

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    Heuristic Mining of Hierarchical Genotypes and Accessory Genome Loci in Bacterial Populations

    Published on: December 7, 2021

    Area of Science:

    • Microbial Forensics
    • Genomics
    • Biosecurity

    Background:

    • Microbial forensics is vital for distinguishing deliberate biological attacks from natural outbreaks.
    • Investigating biological incidents requires detailed pathogen analysis to identify perpetrators.

    Purpose of the Study:

    • To highlight the importance of whole-genome sequencing in microbial forensics.
    • To emphasize the need for high-quality reference databases for pathogen attribution.

    Main Methods:

    • Utilizing next-generation sequencing (NGS) for high-resolution microbial analysis.
    • Performing whole-genome sequencing for comprehensive pathogen strain comparison.

    Main Results:

    • NGS enables unbiased identification of subtle genetic differences between isolates.
    • Whole-genome analysis is effective for identification, characterization, and attribution stages.
    • Low genetic diversity in some pathogens necessitates advanced sequencing methods.

    Conclusions:

    • Whole-genome sequencing is the ultimate method for microbial strain comparison in forensics.
    • High-quality, curated reference databases are essential for effective pathogen tracing.
    • Developing robust genomic databases will improve responses to biocrime and bioterrorism.