Management of Suspected Spontaneous Bacterial Peritonitis in Cirrhosis with Ascites

Initial Treatment and Prophylaxis

The American Association for the Study of Liver Diseases recommends immediate empirical antibiotic treatment with cefotaxime 2g IV every 8 hours for 5 days, and administer albumin 1.5 g/kg within 6 hours followed by 1 g/kg on day 3 if there are any signs of renal impairment in patients with suspected SBP in the setting of cirrhosis and ascites 1, 2
Cefotaxime 2g IV every 8-12 hours is the first-line treatment for suspected SBP, covering 95% of typical organisms, with a treatment duration of 5 days being as effective as 10 days 1
Albumin infusion (1.5 g/kg within first 6 hours, then 1 g/kg on day 3) must be given to patients with any signs of developing renal impairment or sepsis, as this significantly reduces mortality in cirrhotic patients with severe infections 1, 3

Diagnostic paracentesis should be performed immediately and inoculate ascitic fluid into blood culture bottles at bedside, with SBP confirmed when ascitic fluid neutrophil count is ≥250 cells/mm³ 1
All patients recovering from an episode of SBP must receive continuous prophylaxis with norfloxacin 400 mg once daily indefinitely until liver transplantation or resolution of ascites, with norfloxacin reducing the cumulative recurrence rate at one year from 70% to 20% 1, 2, 4
One-year survival after SBP is only 30-50%, falling to 25-30% at two years, making prophylaxis critical 1, 2

Norfloxacin 400 mg daily should be given to high-risk patients with ascitic fluid protein <15 g/L, advanced liver disease, Child-Pugh score ≥9 points, serum bilirubin ≥3 mg/dL, or impaired renal function or hyponatremia, as norfloxacin reduces the one-year probability of developing SBP from 61% to 7% in high-risk patients 2, 4
All cirrhotic patients with acute gastrointestinal bleeding require antibiotic prophylaxis, with IV ceftriaxone 1g daily for 7 days or norfloxacin 400 mg orally twice daily for 7 days being recommended regimens 4

Long-term quinolone prophylaxis increases risk of gram-positive bacterial infections, and consider local bacterial resistance patterns when selecting prophylactic antibiotics 1, 2, 4
Avoid fluoroquinolones in patients already on quinolone prophylaxis for SBP, and be vigilant for fluoroquinolone-associated tendon complications, particularly in patients with renal impairment 2, 3, 4
All patients with SBP (current or prior) should be considered for liver transplantation evaluation due to poor long-term survival 1, 2, 4