What is antibiotic resistance and why can it make infections dangerous?

Antibiotic resistance is the loss of susceptibility of bacteria to the killing or growth-inhibiting effects of an antibiotic agent. It occurs when bacteria evolve mechanisms—such as producing enzymes that inactivate drugs, altering cell-wall proteins, or activating efflux pumps—that allow them to survive exposure to these medications.1

This phenomenon makes infections dangerous because it renders standard treatments ineffective. When resistant strains become the dominant population in an infection, the condition can become untreatable and life-threatening. The indiscriminate or improper use of antibiotics, including their routine use in intensive animal farming, accelerates this process by killing off vulnerable bacteria and leaving only the resistant ones to proliferate and spread.213

Addressing this global health threat is a moral imperative, as the continued efficacy of modern medicine depends on our ability to preserve the power of these life-saving drugs. Efforts to combat resistance include public education on proper antibiotic use, improved diagnostic tools, and stricter regulations on the use of medically important antibiotics in agriculture.31