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Updated: May 26, 2026

Isolation and Identification of Waterborne Antibiotic-Resistant Bacteria and Molecular Characterization of their Antibiotic Resistance Genes
Published on: March 3, 2023
Insights into antibiotic resistance through metagenomic approaches
Robert Schmieder1, Robert Edwards
1Computational Science Research Center & Department of Computer Science, San Diego State University, San Diego, CA 92182, USA.
Abstract:
The consequences of bacterial infections have been curtailed by the introduction of a wide range of antibiotics. However, infections continue to be a leading cause of mortality, in part due to the evolution and acquisition of antibiotic-resistance genes. Antibiotic misuse and overprescription have created a driving force influencing the selection of resistance. Despite the problem of antibiotic resistance in infectious bacteria, little is known about the diversity, distribution and origins of resistance genes, especially for the unculturable majority of environmental bacteria. Functional and sequence-based metagenomics have been used for the discovery of novel resistance determinants and the improved understanding of antibiotic-resistance mechanisms in clinical and natural environments. This review discusses recent findings and future challenges in the study of antibiotic resistance through metagenomic approaches.
Insights
Antibiotic resistance genes in bacteria pose a significant threat, driving mortality despite antibiotic use. Metagenomic approaches are crucial for understanding these resistance genes in diverse environments.
Area of Science:
- Microbiology
- Genetics
- Environmental Science
Background:
- Antibiotics have reduced bacterial infection mortality but antibiotic resistance is a growing concern.
- Antibiotic resistance genes (ARGs) are a major factor in infectious disease mortality.
- Misuse and overprescription of antibiotics accelerate the selection of resistance.
Purpose of the Study:
- To review recent findings on antibiotic resistance using metagenomic approaches.
- To highlight the diversity, distribution, and origins of ARGs, especially in environmental bacteria.
- To discuss future challenges in studying antibiotic resistance.
Main Methods:
- Functional metagenomics for novel resistance determinant discovery.
- Sequence-based metagenomics for understanding resistance mechanisms.
- Review of existing literature on metagenomic studies of antibiotic resistance.
Main Results:
- Metagenomics has identified novel antibiotic resistance determinants.
- These approaches improve understanding of resistance mechanisms in clinical and environmental settings.
- Significant gaps remain in knowledge regarding ARGs in unculturable bacteria.
Conclusions:
- Metagenomic tools are essential for advancing the study of antibiotic resistance.
- Further research is needed to explore the full diversity and origins of ARGs.
- Addressing antibiotic resistance requires a comprehensive understanding of its genetic basis.
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