This tool supports structured infectious-disease decision making but does not replace clinician judgement or local guideline pathways.
This OpiCalc infectious-disease entry reflects commonly used guideline criteria and bedside risk features used in contemporary clinical practice.
SBP Criteria: Ascitic PMN threshold and clinical deterioration determine spontaneous bacterial peritonitis urgency.
Ascitic PMN ≥250 cells/mm³
+3 Points
Positive ascitic culture
+2 Points
Fever or abdominal pain
+1 Points
AKI or encephalopathy
GI bleed / severe cirrhosis context
Sepsis or shock physiology
Assessment Tier
Score 0
Selected profile does not strongly support SBP.