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Mechanism of Antibiotic Resistance in MRSA

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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...

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Updated: Jun 8, 2026

Characterizing Multidrug Efflux Systems in Acinetobacter baumannii Using an Efflux-Deficient Bacterial Strain and a Single-Copy Gene Expression System

Characterizing Multidrug Efflux Systems in Acinetobacter baumannii Using an Efflux-Deficient Bacterial Strain and a Single-Copy Gene Expression System

Published on: January 5, 2024

Multidrug resistant acinetobacter.

Vikas Manchanda¹, Sinha Sanchaita, Np Singh

¹Clinical Microbiology and Infectious Diseases Division, Chacha Nehru Bal Chikitsalaya and associated Maulana Azad Medical College, Government of NCT of Delhi, Geeta Colony, Delhi - 110031, India.

Journal of Global Infectious Diseases

|October 8, 2010

Summary

This summary is machine-generated.

Acinetobacter species are increasingly resistant to antibiotics, causing healthcare-associated infections. Urgent infection control and antimicrobial stewardship are vital to combat multidrug-resistant (MDR) Acinetobacter spread.

Keywords:

Acinetobacter Antimicrobial resistance Antimicrobial stewardship Antimicrobial therapy Clinical implications Hospital acquired infections Infection control Nosocomial infections Outbreak

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Last Updated: Jun 8, 2026

Characterizing Multidrug Efflux Systems in Acinetobacter baumannii Using an Efflux-Deficient Bacterial Strain and a Single-Copy Gene Expression System

Characterizing Multidrug Efflux Systems in Acinetobacter baumannii Using an Efflux-Deficient Bacterial Strain and a Single-Copy Gene Expression System

Published on: January 5, 2024

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 and Infectious Diseases
Antimicrobial Resistance
Public Health

Background:

The emergence and global spread of Acinetobacter species resistant to multiple antimicrobial agents pose a significant public health concern.
These multidrug-resistant (MDR) pathogens are frequently implicated in healthcare-associated infections (HAIs), complicating treatment and increasing patient morbidity and mortality.
Varied definitions for terms like MDR, Extensively Drug Resistant (XDR), and Pan Drug Resistant (PDR) in published literature create confusion in data correlation.

Purpose of the Study:

To review the mechanisms of antimicrobial resistance in Acinetobacter species.
To explore current therapeutic strategies, including combination therapies, for treating infections caused by resistant Acinetobacter.
To highlight the urgent need for enhanced infection control and antimicrobial stewardship.

Main Methods:

A comprehensive literature search was conducted using PubMed, Google Scholar, and Cochrane Library.
Keywords included 'Acinetobacter Resistance', 'multidrug resistant (MDR)', 'Antimicrobial Therapy', 'Outbreak', 'Colistin', 'Tigecycline', 'AmpC enzymes', and 'carbapenemases'.
The review synthesized information on resistance mechanisms, treatment options, and control strategies.

Main Results:

Discusses various resistance mechanisms employed by Acinetobacter species.
Examines current therapeutic options, including combination therapies, for adult and pediatric infections.
Highlights the challenges posed by inconsistent definitions of resistance levels (MDR, XDR, PDR).

Conclusions:

There is an urgent need for stringent infection control measures to prevent the spread of resistant Acinetobacter.
Antimicrobial stewardship programs are crucial to optimize antibiotic use and delay the emergence of further resistance.
Effective management requires a multi-faceted approach addressing resistance mechanisms, treatment, and prevention.