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Development of Antibiotic Resistance

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 Resistance

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 MRSA

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...

Antibiotic Selection

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Microbiota Modulation by Antibiotics

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...

Inhibitors of Bacterial Protein Synthesis

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Aminoglycosides constitute a highly potent class of bactericidal antibiotics that exert their antimicrobial effects by targeting the bacterial ribosome, specifically disrupting protein synthesis. These polycationic molecules consist of amino-modified sugars linked via glycosidic bonds to an aminocyclitol core such as 2-deoxystreptamine or streptamine. Their strong positive charges facilitate tight binding to the negatively charged phosphate backbone of ribosomal RNA (rRNA), primarily at the 16S...

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Related Experiment Video

Updated: Jul 7, 2026

Quantitative Examination of Antibiotic Susceptibility of Neisseria gonorrhoeae Aggregates Using ATP-utilization Commercial Assays and Live/Dead Staining

Quantitative Examination of Antibiotic Susceptibility of Neisseria gonorrhoeae Aggregates Using ATP-utilization Commercial Assays and Live/Dead Staining

Published on: February 8, 2019

Antibiotic-resistant gonococci - past, present and future.

¹Sexually Transmitted Infections Reference Centre, National Institute for Communicable Diseases, South Africa. davidl@nicd.ac.za

South African Medical Journal = Suid-Afrikaanse Tydskrif Vir Geneeskunde

|February 6, 2008

Summary

Gonorrhoea is a common STI, and antibiotic resistance is a growing problem. New treatment strategies, including multi-drug therapy and increased condom use, are urgently needed to combat resistant strains.

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Last Updated: Jul 7, 2026

Quantitative Examination of Antibiotic Susceptibility of Neisseria gonorrhoeae Aggregates Using ATP-utilization Commercial Assays and Live/Dead Staining

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Isolation and Identification of Waterborne Antibiotic-Resistant Bacteria and Molecular Characterization of their Antibiotic Resistance Genes

Isolation and Identification of Waterborne Antibiotic-Resistant Bacteria and Molecular Characterization of their Antibiotic Resistance Genes

Published on: March 3, 2023

Area of Science:

Microbiology
Public Health
Infectious Diseases

Background:

Gonorrhoea is a prevalent sexually transmitted infection (STI) globally.
Neisseria gonorrhoeae has developed significant antibiotic resistance since the 1930s.
Untreated gonorrhoea can lead to severe complications like pelvic inflammatory disease.

Purpose of the Study:

To address the emergence of quinolone resistance in gonococci in South Africa.
To recommend changes in first-line gonorrhoea therapy.
To highlight the need for future multi-drug strategies and enhanced prevention.

Main Methods:

The abstract does not specify the methods used in the study.
It discusses the historical development of antibiotic resistance in gonorrhoea.
It analyzes current treatment recommendations and emerging resistance patterns.

Main Results:

Quinolone resistance in gonococci has emerged in South Africa.
This resistance threatens the effectiveness of current syndromic management.
Existing therapies are becoming less effective due to widespread resistance.

Conclusions:

First-line therapy for gonorrhoea in South Africa must shift from ciprofloxacin to third-generation cephalosporins.
The future of managing antibiotic-resistant gonorrhoea will likely involve multi-drug therapies.
Condom use and STI prevention efforts must be intensified.