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Updated: Aug 23, 2026

Biosensor for Detection of Antibiotic Resistant Staphylococcus Bacteria
Published on: May 8, 2013
[Methicillin-resistance of staphylococci and methods of detection]
Tóth Mónika Fehérváriné1, Ferenc Rozgonyi
1Allatgyógyászati Oltóanyag-, Gyógyszer- és Takarmányellenórzó Intézet, Budapest.
Abstract:
In Hungary more than 25% of Staphylococcus aureus strains and 33.4-70.1% of strains of different coagulase-negative Staphylococcus species isolated from inpatients in the last five years were methicillin-resistant. These are great clinical problems because the methicillin-resistant strains are resistant to all beta-lactam antibiotics, furthermore, most of them exhibit multiple resistance, too. For these reasons, the fast and exact microbiological diagnosis is of utmost basic and life-saving importance. In this review the most important evidences for proving pathogenicity and virulence of methicillin-resistant S. aureus strains and our knowledge on the origin, genetic background, conditions of expression, forms of appearance, phenotypical and genotypical properties of methicillin resistance are summarised. Phenotypical semiquantitative and quantitative methods aiming the detection of methicillin resistance are shown with their advantages and restrictions. Genetic methods applicable to detect mecA gene responsible for coding methicillin resistance, furthermore, those by which clonal and genomic relationship and spread can be proven in epidemic cases are presented. Finally, up-to-date schemes for a proper identification as well as systemic and local elimination of methicillin resistant Staphylococcus strains are suggested.
Insights
Methicillin-resistant Staphylococcus strains, including Staphylococcus aureus, are a growing problem in Hungary, showing resistance to beta-lactam antibiotics and often multiple drugs. Rapid and accurate diagnosis is crucial for patient survival.
Area of Science:
- Microbiology
- Infectious Diseases
- Antimicrobial Resistance
Background:
- High prevalence of methicillin-resistant Staphylococcus species (MRSS) in Hungarian hospitals (over 25% S. aureus, 33.4-70.1% coagulase-negative species).
- MRSS poses significant clinical challenges due to resistance to beta-lactam antibiotics and frequent multidrug resistance.
- Urgent need for rapid and accurate microbiological diagnosis of MRSS.
Purpose of the Study:
- To review evidence on the pathogenicity and virulence of methicillin-resistant S. aureus (MRSA).
- To summarize current knowledge on the origin, genetics, and expression of methicillin resistance.
- To present diagnostic methods and strategies for MRSS elimination.
Main Methods:
- Review of existing literature on MRSA pathogenicity and virulence.
- Summary of genotypic and phenotypic properties of methicillin resistance.
- Description of phenotypic (semiquantitative, quantitative) and genetic (mecA gene detection, clonal/genomic typing) diagnostic methods.
Main Results:
- Detailed overview of MRSA pathogenicity and virulence factors.
- Comprehensive summary of the genetic basis and phenotypic expression of methicillin resistance.
- Evaluation of advantages and limitations of various diagnostic techniques.
Conclusions:
- Emphasizes the critical importance of precise and timely microbiological diagnosis for managing MRSS infections.
- Provides up-to-date schemes for effective identification and elimination of methicillin-resistant Staphylococcus strains.
- Highlights the need for continued research into MRSS epidemiology and control strategies.
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