How does the overuse of antibiotics contribute to an increase of MRSA?

The overuse of antibiotics creates selective pressure on bacteria, allowing drug-resistant strains like MRSA (Methicillin-resistant Staphylococcus aureus) to thrive and multiply. When antibiotics are excessively prescribed or misused, sensitive bacteria are killed off while resistant ones survive and proliferate, leading to a higher prevalence of MRSA infections. Additionally, the spread of MRSA can occur in healthcare settings and communities, further complicating treatment options and increasing the risk of serious infections. Ultimately, the misuse of antibiotics undermines their effectiveness and contributes to the ongoing challenge of antibiotic resistance.