Targeted Antibiotic Selection Prevents Resistance

Steps:

• Recognize repeated same-antibiotic use selects for resistant pathogen variants.
• Identify need to confirm pathogen identity and susceptibility to avoid misuse.
• Evaluate options for minimizing selective pressure on the pathogen.
• Select approach using testing to guide precise treatment.

Why C is correct:

• Antibiotic susceptibility testing identifies the effective drug, reducing unnecessary exposure that drives resistance per principles of antimicrobial stewardship.

Why the others are wrong:

• A: "Non-cellular resistance" is invalid; narrow spectrum alone doesn't address confirmed susceptibility.
• B: Higher doses of the same antibiotic intensify selective pressure, accelerating resistance evolution.
• D: Broad spectrum targets multiple strains unnecessarily, promoting resistance in non-target microbes.

Final answer: C