In suspected SIRS with septic features, which step should be performed before antibiotics are started?

• A. Pan culture prior to initiating antibiotics
• B. Start broad-spectrum antibiotics immediately
• C. Initiate IV isotonic fluids
• D. Use vasopressor if no response to fluids

Answer: (A)

Drawing cultures before starting antibiotics is best because it provides a chance to identify the causative organism and tailor therapy later, without sacrificing the ability to treat promptly. In suspected sepsis, obtaining blood cultures (typically two sets from separate sites) and other relevant cultures before antibiotics maximizes diagnostic yield and guides targeted therapy while you proceed with resuscitation and empiric treatment. After cultures are drawn, you should initiate broad-spectrum antibiotics promptly and begin fluid resuscitation; vasopressors are added if blood pressure remains low despite fluids. The other steps are important parts of sepsis management, but they should follow the decision to obtain cultures, not precede the culture collection.