Antimicrobial resistance in the intensive care unit: mechanisms, epidemiology, and management of specific resistant

Henry S Fraimow1, Constantine Tsigrelis

  • 1Division of Infectious Diseases, UMDNJ-Robert Wood Johnson Medical School, Cooper University Hospital, 401 Haddon Avenue, Room 274, Camden, NJ 08103, USA. fraimow-henry@cooperhealth.edu

Critical Care Clinics
|December 15, 2010
PubMed

Insights

Drug-resistant infections present significant healthcare challenges, especially in intensive care units (ICUs). This review covers antimicrobial resistance mechanisms, transmission, and management of resistant pathogens in the ICU.

Area of Science:

  • Microbiology
  • Infectious Diseases
  • Critical Care Medicine

Background:

  • Drug-resistant and multidrug-resistant microbial pathogens cause severe healthcare challenges.
  • These challenges are significantly amplified in intensive care units (ICUs) due to high selection pressures and transmission risks.
  • Antimicrobial resistance in ICUs necessitates careful management of empiric antimicrobial regimens.

Purpose of the Study:

  • To review fundamental concepts of antibacterial agent resistance.
  • To discuss mechanisms and transmission modes of antimicrobial resistance.
  • To address management strategies for prevalent drug-resistant pathogens in the ICU.

Main Methods:

  • Literature review of basic concepts in antimicrobial resistance.
  • Analysis of resistance mechanisms and transmission pathways.
  • Discussion of clinical management issues for ICU pathogens.

Main Results:

  • Antimicrobial resistance poses a major threat to patient care, particularly in ICUs.
  • Understanding resistance mechanisms and transmission is crucial for effective control.
  • Specific management strategies are needed for key drug-resistant pathogens in critical care settings.

Conclusions:

  • Effective containment and treatment of drug-resistant infections require a comprehensive understanding of resistance.
  • ICUs are critical environments for managing antimicrobial resistance due to heightened risks.
  • Evidence-based management of resistant pathogens is essential for improving patient outcomes in critical care.

Related Concept Videos

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...
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...
Healthcare Associated Infections II: Preventive Measures01:22

Healthcare Associated Infections II: Preventive Measures

Essential infection prevention measures are based on the knowledge of the infection chain, the modes of transmission in healthcare settings, and the use of the best practices in all healthcare settings. Compulsory public reporting of healthcare-associated infection rates is needed to allow individuals and the community to make informed choices regarding selecting a healthcare facility.
The best practices for preventing healthcare-associated infections include hand hygiene, patient risk...
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...
Acute Pyelonephritis II: Diagnostic Studies and Management01:28

Acute Pyelonephritis II: Diagnostic Studies and Management

Introduction:For diagnosing acute pyelonephritis, a comprehensive patient history is collected to identify symptoms such as dysuria, frequent or urgent urination, flank pain, or costovertebral angle (CVA) tenderness that may suggest a kidney infection.Physical ExaminationDuring the physical examination, CVA tenderness is assessed. This involves gentle percussion over the costovertebral angle, where tenderness often indicates a kidney infection.Diagnostic TestsUrinalysis: Used to identify white...
Pneumonia IV: Management01:28

Pneumonia IV: Management

The treatment of pneumonia varies based on its severity and the causative pathogen. Here is a structured approach to managing pneumonia, integrating pharmaceutical and supportive care strategies.
Bacterial Pneumonia Treatment
For bacterial pneumonia, antibiotics serve as the cornerstone of therapy. Initial treatment often begins with empirical antibiotics, tailored to the anticipated causative organism and adjusted based on culture results. Key antibiotic choices include: