Related Experiment Video
Updated: May 15, 2026
Biosensor for Detection of Antibiotic Resistant Staphylococcus Bacteria
Published on: May 8, 2013
Bacteriophages for Controlling Multidrug-Resistant Klebsiella pneumoniae on Common Clinical Surface Materials
Andrea Katherine Álvarez Osorio1, Juliana Valentina Arias Bonilla1, Juliana Vanessa Rincón López2
1Department of Biological Sciences, Centro de Investigaciones Microbiológicas (CIMIC), Universidad de Los Andes, Bogotá, Colombia.
Introduction:
The prevalence of Klebsiella pneumoniae on surfaces, its increased antibiotic resistance, and strain-specific disinfectant resistance underscore the need for alternative decontamination methods.
Materials And Methods:
This study investigated the potential capacity of three newly isolated bacteriophages to control multidrug-resistant K. pneumoniae on common clinical surface materials (steel, fabric, PVC, and polystyrene). To the best of our knowledge, no survival studies of K. pneumoniae on these materials have yet been conducted.
Results:
K. pneumoniae remained viable on surfaces for up to 24 h. After 24 h, reductions in bacterial counts were lower at 24°C (0.49-1.59 log colony-forming units [CFU]) than those observed at 37°C (1.69-3.88 log CFU). These results are noteworthy as temperatures in intensive care units (ICUs) and surgical wards are typically 20-26°C and 20-23°C, respectively. Applying the phages at multiplicity of infection (MOI) 1000 achieved reductions of up to 4.99 log CFU at hour six across the surfaces at 37°C, while in the control tests (without phages) the counts decreased by <1 log CFU. Comparison with a commercial disinfectant revealed a faster initial reduction in bacterial counts; however, regrowth occurred over time. In contrast, the phages steadily decreased the clinical strain's bacterial counts over 6 h at 24°C.
Conclusions:
These findings suggest that bacteriophages can be used as effective disinfectants and as valuable tools for outbreak control in health care settings.
Insights
Newly isolated bacteriophages effectively control multidrug-resistant Klebsiella pneumoniae on clinical surfaces. These phages offer a promising alternative to disinfectants for healthcare settings, reducing bacterial counts over time.
Area of Science:
- Microbiology
- Infectious Diseases
- Environmental Health
Background:
- Klebsiella pneumoniae prevalence on surfaces and increasing antibiotic resistance necessitate novel decontamination strategies.
- Disinfectant resistance in K. pneumoniae strains highlights the need for alternative control methods.
- Limited data exists on K. pneumoniae survival on common clinical surface materials.
Purpose of the Study:
- To evaluate the efficacy of three novel bacteriophages against multidrug-resistant K. pneumoniae.
- To assess phage efficacy on various clinical surface materials (steel, fabric, PVC, polystyrene).
- To compare phage-based decontamination with traditional disinfectants.
Main Methods:
- Isolation and characterization of three novel bacteriophages targeting K. pneumoniae.
- In vitro survival studies of K. pneumoniae on steel, fabric, PVC, and polystyrene surfaces.
- Application of bacteriophages at a multiplicity of infection (MOI) of 1000.
- Comparison of bacterial count reduction with a commercial disinfectant.
Main Results:
- K. pneumoniae remained viable on surfaces for up to 24 hours.
- Bacteriophages achieved significant reductions in bacterial counts (up to 4.99 log CFU) within 6 hours at 37°C.
- At 24°C, phages demonstrated sustained bacterial count reduction over 6 hours, unlike disinfectants which showed regrowth.
- Phage efficacy was observed across steel, fabric, PVC, and polystyrene surfaces.
Conclusions:
- Bacteriophages are effective agents for controlling multidrug-resistant K. pneumoniae on clinical surfaces.
- Phage therapy presents a viable alternative to conventional disinfectants in healthcare environments.
- Bacteriophages show potential as tools for managing outbreaks and ensuring surface hygiene in hospitals.
Related Concept Videos
01:25Clinical Significance of Antibiotic Resistance
01:30Lytic Cycle of Bacteriophages
01:28Biological Methods for Microbial Control
01:25Mechanism of Antibiotic Resistance in MRSA
01:26Physical Methods for Controlling Microbial Growth: Radiation and Filtration
01:31Defense Against Bacterial Pathogens
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...