In sepsis management, why are cultures obtained before starting antibiotics?

• A. To identify the causative organism and tailor therapy
• B. To confirm that infection exists regardless of therapy
• C. To delay antibiotics until results are back
• D. To decide which IV line to use

Answer: (A)

Obtaining cultures before starting antibiotics aims to identify the organism causing the infection and determine its antibiotic sensitivities so treatment can be tailored accordingly. When you have culture and sensitivity results, you can narrow therapy from broad-spectrum empiric coverage to a targeted antibiotic that’s most effective against the exact bug. This improves effectiveness, reduces unnecessary exposure to broad-spectrum drugs, lowers adverse effects and costs, and supports antibiotic stewardship by preventing resistance. In practice, cultures should be drawn promptly and antibiotics started as soon as possible; do not delay therapy waiting for results, but use the culture data to adjust therapy once results are available.