• Systemic Inflammatory Response Syndrome (SIRS): Two or more of the following conditions: temperature >38.5°C or <36.0°C; heart rate of >90 beats/min; respiratory rate of >20 breaths/min or PaCO2 of <32 mm Hg; and WBC count of >12,000 cells/mL or <4000 cells/mL, or >10 percent immature (band) forms