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Published on: February 19, 2019
[Correlation of slime production and pathogenicity of coagulase-negative staphylococci]
Abstract:
Coagulase-negative staphylococci have been increasingly recognized as pathogens in patients with indwelling medical devices. Slime production may be an important virulence factor. Slime production and antibiotic susceptibility were studied of 117 coagulase-negative staphylococci isolated from clinical specimens. The frequency of slime production among 26 coagulase-negative staphylococci was about three times higher than among 91 isolates regarded as contaminants. The former strains were isolated from 10 patients, 8 of which had device related infections. Multiply resistant cultures occurred in 22.2%, but all strains were susceptible to vancomycin.
Insights
Slime-producing coagulase-negative staphylococci are more frequent in device-related infections. While many strains show multiple drug resistance, vancomycin remains effective against these pathogens.
Area of Science:
- Microbiology
- Infectious Diseases
- Medical Device Infections
Context:
- Coagulase-negative staphylococci (CoNS) are emerging pathogens, particularly in healthcare settings.
- Indwelling medical devices create a niche for CoNS colonization and infection.
- Slime production is a potential virulence factor in CoNS infections.
Purpose:
- To investigate the association between slime production and CoNS pathogenicity.
- To determine the antibiotic susceptibility profiles of slime-producing CoNS.
- To compare the prevalence of slime production in CoNS from device-related infections versus contaminants.
Summary:
- This study analyzed 117 CoNS isolates from clinical specimens.
- Slime-producing CoNS were found at a significantly higher frequency (threefold) in device-related infections compared to contaminants.
- Of the 26 slime-producing strains, 22.2% exhibited multidrug resistance, yet all remained susceptible to vancomycin.
Impact:
- Highlights slime production as a key factor in CoNS virulence and device-related infections.
- Informs clinical management by identifying vancomycin as a reliable treatment option for these resistant strains.
- Emphasizes the need for vigilance in diagnosing and treating CoNS infections associated with medical devices.
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