Related Experiment Videos
[Problems of antibiotic-resistance Gram negative pathogens in the hospital environment]
1Laboratoire central de bactériologie, Hôpital Cantonal Universitaire, 25, rue Micheli-du-Crest CH-1211 Genève 4. nadia.liassine@hcuge.ch
Abstract:
Gram-negative pathogens in the hospital environment belong to such distinct families as Enterobacteriaceae, Pseudomonas, Acinetobacter and Stenotrophomonas. They differ in virulence but all present natural (or intrinsic) resistance and the capacity to develop rapidly acquired resistance, the main factor in their selection in the hospital environment. Dissemination of resistance is due either to dissemination of a clonal strain or dissemination of the gene of resistance amongst bacteria belonging to unrelated species. In medical practice, the development of resistance poses various problems: a therapeutic problem for the physician who must prescribe an active antibiotic that does not select resistant mutants; a microbiological problem in relation to the difficulty of detecting particular resistances such as the production of extended spectrum beta-lactamase; a problem for the infection control team whose task is to limit the dissemination of multi-resistant bacteria. Against the complexity and efficacy of bacterial resistance strategies against antimicrobial agents, the combined competences of clinicians, microbiologists and the infection control team are needed.
Insights
Hospital-acquired Gram-negative pathogens exhibit intrinsic and acquired resistance, driving their selection. Combating antimicrobial resistance requires collaboration among clinicians, microbiologists, and infection control teams.
Area of Science:
- Microbiology
- Infectious Diseases
- Antimicrobial Resistance
Context:
- Gram-negative pathogens like Enterobacteriaceae, Pseudomonas, Acinetobacter, and Stenotrophomonas are prevalent in hospitals.
- These bacteria possess intrinsic resistance and rapidly acquire new resistance mechanisms.
- The selection and dissemination of these resistant strains pose significant challenges in healthcare settings.
Purpose:
- To highlight the mechanisms of resistance in Gram-negative hospital pathogens.
- To underscore the difficulties in managing and controlling the spread of multidrug-resistant bacteria.
- To emphasize the need for a multidisciplinary approach to combat antimicrobial resistance.
Summary:
- Gram-negative pathogens in hospitals display inherent and acquired resistance, contributing to their prevalence.
- Resistance spreads through clonal dissemination or horizontal gene transfer among bacterial species.
- Detecting resistance, such as extended-spectrum beta-lactamase production, and managing infections caused by multidrug-resistant organisms are complex clinical and microbiological issues.
Impact:
- Effective management of hospital-acquired infections necessitates a coordinated strategy involving clinical, microbiological, and infection control expertise.
- Addressing the complexity of bacterial resistance requires integrated efforts to preserve antibiotic efficacy.
- Improved detection and control measures are crucial to mitigate the impact of multidrug-resistant Gram-negative pathogens.