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Related Concept Videos

Antibiotic Selection00:57

Antibiotic Selection

Overview
Microbiota Modulation by Antibiotics01:21

Microbiota Modulation by Antibiotics

Antibiotics have revolutionized modern medicine by saving countless lives from bacterial infections. However, their widespread use has inadvertently harmed the delicate balance of the human gut microbiota. The gut microbiota, a complex community of bacteria, archaea, viruses, and fungi, plays a vital role in regulating metabolism, immune responses, and maintaining intestinal health. Antibiotics, especially broad-spectrum types, disrupt this ecosystem by eradicating both harmful and beneficial...
Development of Antibiotic Resistance01:30

Development of Antibiotic Resistance

Antibiotic resistance is a major public health concern that arises when bacteria evolve mechanisms to withstand the effects of antibiotic treatments. This resistance can be intrinsic, acquired through genetic mutations, or transferred between bacteria via horizontal gene transfer. The development of antibiotic resistance poses significant challenges in treating bacterial infections and necessitates ongoing research to develop new therapeutic strategies.Intrinsic resistance occurs when bacterial...
Clinical Significance of Antibiotic Resistance01:25

Clinical Significance of Antibiotic Resistance

Methicillin-resistant Staphylococcus aureus (MRSA) presents a critical public health threat, arising from its capacity to resist β-lactam antibiotics due to acquisition of the mecA gene within the staphylococcal cassette chromosome mec (SCCmec). This gene encodes penicillin-binding protein 2a (PBP2a), which impairs binding efficacy of methicillin and other β-lactams. MRSA has evolved into distinct clonal lineages impacting humans and animals alike, reinforcing its significance within the One...
Mechanism of Antibiotic Resistance in MRSA01:25

Mechanism of Antibiotic Resistance in MRSA

Antibiotic resistance in bacteria arises when microorganisms evolve the ability to withstand drugs designed to kill them or inhibit their growth, rendering once-effective treatments useless. This phenomenon, driven by genetic change and selection under antibiotic exposure, poses a profound threat to modern medicine. Mechanisms include drug-inactivating enzymes (e.g., β-lactamases), efflux pumps that eject antibiotics, mutations altering antibiotic targets, decreased drug uptake, and acquisition...
Production of Antibiotics01:27

Production of Antibiotics

Penicillin, one of the earliest and most widely used antibiotics, is produced industrially by the filamentous fungus Penicillium chrysogenum. Large stirred-tank bioreactors ranging from tens to hundreds of thousands of liters maintain tightly controlled temperature, pH, and dissolved oxygen conditions to support fungal metabolism and maximize antibiotic yield. Penicillin is a secondary metabolite, synthesized primarily during the stationary growth phase, which requires a carefully managed...

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Related Experiment Video

Updated: Jul 6, 2026

Time-Lapse Epifluorescence Microscopy Imaging of Pseudomonas aeruginosa and Staphylococcus aureus Heterogeneous Phenotypes
07:44

Time-Lapse Epifluorescence Microscopy Imaging of Pseudomonas aeruginosa and Staphylococcus aureus Heterogeneous Phenotypes

Published on: February 14, 2025

Bacteria subsisting on antibiotics.

Gautam Dantas1, Morten O A Sommer, Rantimi D Oluwasegun

  • 1Department of Genetics, Harvard Medical School, Boston, MA 02115, USA.

Science (New York, N.Y.)
|April 5, 2008
PubMed
Summary

Soil bacteria can grow using antibiotics as their only food source. This discovery reveals a hidden reservoir of antibiotic resistance, potentially worsening the threat of drug-resistant infections.

Area of Science:

  • Microbiology
  • Environmental Science
  • Ecology

Background:

  • Antibiotics, essential for treating bacterial infections, are often natural products from microorganisms.
  • The ecological roles of antibiotic-producing microorganisms in the environment are not well understood.
  • Antibiotic resistance is a growing global health concern.

Purpose of the Study:

  • To investigate the capacity of soil bacteria to utilize antibiotics as a sole carbon source.
  • To explore the diversity and antibiotic resistance profiles of bacteria that consume antibiotics.
  • To assess the potential contribution of environmental bacteria to the pool of antibiotic resistance determinants.

Main Methods:

  • Isolation and cultivation of soil bacteria from diverse soil samples.

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Population and Single-Cell Analysis of Antibiotic Persistence in Escherichia coli
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Population and Single-Cell Analysis of Antibiotic Persistence in Escherichia coli

Published on: March 24, 2023

Related Experiment Videos

Last Updated: Jul 6, 2026

Time-Lapse Epifluorescence Microscopy Imaging of Pseudomonas aeruginosa and Staphylococcus aureus Heterogeneous Phenotypes
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Time-Lapse Epifluorescence Microscopy Imaging of Pseudomonas aeruginosa and Staphylococcus aureus Heterogeneous Phenotypes

Published on: February 14, 2025

Monitoring Intraspecies Competition in a Bacterial Cell Population by Cocultivation of Fluorescently Labelled Strains
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Monitoring Intraspecies Competition in a Bacterial Cell Population by Cocultivation of Fluorescently Labelled Strains

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Population and Single-Cell Analysis of Antibiotic Persistence in Escherichia coli
12:29

Population and Single-Cell Analysis of Antibiotic Persistence in Escherichia coli

Published on: March 24, 2023

  • Testing the growth of bacterial isolates on 18 different antibiotics as the sole carbon source.
  • Phylogenetic analysis of antibiotic-degrading bacteria.
  • Determination of antibiotic resistance profiles for isolated bacteria against clinically relevant concentrations.

    • Main Results:

    • Hundreds of soil bacteria capable of growing on antibiotics were isolated.
    • 13 to 17 out of 18 tested antibiotics supported bacterial growth across 11 diverse soils.
    • Antibiotic-consuming bacteria exhibited significant phylogenetic diversity, with some related to human pathogens.
    • All antibiotic-consuming isolates demonstrated resistance to multiple antibiotics at clinically relevant concentrations.

    Conclusions:

    • Soil bacteria can metabolize various antibiotics, indicating a significant environmental role for these compounds.
    • A diverse reservoir of antibiotic-resistant bacteria exists in soils, capable of subsisting on antibiotics.
    • Environmental bacteria possessing antibiotic resistance genes may contribute to the spread of multiple antibiotic resistance in human pathogens.