Background While the frequency of methicillin-resistant Staphylococcus aureus (MRSA) continues to rise globally, there is a fear regarding an increase in vancomycin resistance among S. aureus strains. As far back as the 1960s, MRSA was one of the world’s most prevalent antibiotic-resistant bacteria. Among hospitalized patients and community members, MRSA is the cause of a significant number of infections. As a result of its resistance to classical beta-lactam and, in some cases, vancomycin antibiotics, efforts must be made as soon as feasible to find a new approach to fighting MRSA. Purpose This study is designed to evaluate the antibacterial activity of quinoxaline derivative compound against MRSA in comparison with vancomycin as a reference drug. Methods Sixty MRSA isolates were subjected to susceptibility testing by broth microdilution method for quinoxaline derivative compound and vancomycin. Each drug’s minimal inhibitory concentration (MIC) was determined and compared. Results Among the sixty MRSA isolates, most of the quinoxaline derivative compound MIC findings (56.7%) were 4 µg/mL compared to vancomycin MIC values (63.3%) of 4 µg/mL. In comparison, 20% of quinoxaline derivative compound MIC readings were 2 µg/mL, while the vancomycin MIC results were 6.7%. However, the overall proportion of MIC readings at ≤2 µg/mL for both antibacterial agents was equal (23.3%). None of the isolates were resistant to vancomycin. Conclusion This experiment revealed that most MRSA isolates were associated with low MICs (1–4 μg/mL) for quinoxaline derivative compound. Overall, the susceptibility of the quinoxaline derivative compound signifies a promising efficacy against MRSA and may set a novel treatment approach.
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