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Methicillin resistant Staphylococcus aureus: A brief review of virulence and resistance
Ufaq Tasneem1, Khalid Mehmood2, Mahnoor Majid1
1Department of Industrial Biotechnology, Atta-ur-Rahman School of Applied Biosciences, National University of Science and Technology, Islamabad, Pakistan.
Abstract:
Staphylococcus aureus is a common gram-positive human pathogen involved in both community-acquired and nosocomial infections ranging from localised superficial lesions to food poisoning and fatal systemic infections owing to its impressive array of virulence factors responsible for attaching, colonising, invading, and avoiding host immune system. The discovery of antibiotics effectively checked the once deadly infections. However, resistance started soon after their discovery and the first methicillin-resistant strain of staphylococcus aureus was reported in the early 1960s. The most important attribute of methicillin-resistant staphylococcus aureus is its acquisition of mecA gene coding for penicillin-binding protein-2a that blocks inhibitory action on peptidoglycan cross-linking. Methicillin-resistant staphylococcus aureus presents a serious global healthcare concern being responsible for prolonged hospital stays and increased mortality. The precise information of virulence factors and resistant traits of methicillin-resistant staphylococcus aureus and their interplay in a community is key to minimize the intermixing of resistant and susceptible pathogens in the community.
Insights
Methicillin-resistant Staphylococcus aureus (MRSA) causes severe infections due to its virulence factors and resistance genes like mecA. Understanding MRSA
Area of Science:
- Microbiology
- Infectious Diseases
- Antimicrobial Resistance
Background:
- Staphylococcus aureus is a significant human pathogen causing diverse infections.
- Antibiotic discovery initially controlled infections, but resistance emerged rapidly.
- Methicillin-resistant Staphylococcus aureus (MRSA) emerged in the 1960s.
Purpose of the Study:
- To detail the virulence factors and resistance mechanisms of MRSA.
- To understand the community interplay of resistant and susceptible strains.
- To inform strategies for minimizing MRSA spread.
Main Methods:
- Literature review on Staphylococcus aureus and MRSA.
- Analysis of virulence factors and resistance traits.
- Epidemiological assessment of community pathogen dynamics.
Main Results:
- MRSA possesses virulence factors for attachment, colonization, invasion, and immune evasion.
- The mecA gene confers methicillin resistance by altering penicillin-binding protein 2a.
- MRSA contributes to prolonged hospital stays and increased mortality.
Conclusions:
- MRSA poses a critical global healthcare challenge.
- Knowledge of MRSA virulence and resistance is essential for control.
- Minimizing pathogen intermixing in communities is key to reducing MRSA impact.
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