Clinical Study on the Effectiveness of Antibiotics Combined With Bifidobacterium Quadruple Live Tablets in Treating Cirrhosis With Spontaneous Bacterial Peritonitis and Preventing Recurrence

Inclusion Criteria: * Age 18-80, any gender * Meets the diagnostic criteria of the Cirrhosis Ascites Diagnosis and Treatment Guidelines (2023 edition), confirmed cirrhosis ascites SBP * At least one week before enrollment, no antibiotics or probiotics treatment * The patient has some organ function and is expected to live more than a year. Platelets ≥50×10⁹/L, hemoglobin ≥90 g/L (patients with anemia need appropriate treatment) ALT和AST\<3×ULN Serum creatinine ≤1.5×ULN and creatinine clearance ≥50 mL/min * Voluntarily sign the informed consent form Exclusion Criteria: * Patients with severe liver damage (total bilirubin levels more than 5 times the upper limit of normal, mainly with elevated direct bilirubin), hepatorenal syndrome, or hepatic encephalopathy * Patients with combined blood and other site (like lungs or urinary system) infections, or those with significant hemodynamic changes, or severe SBP infections * Patients with both intrahepatic and extrahepatic malignant tumors, or those with a history of malignant solid tumors or blood cancers * Patients with gastrointestinal bleeding or intestinal obstruction who need emergency treatment * People who have had serious cardiovascular disease in the past 6 months or currently（ Researchers consider clinically significant myocardial ischemia, myocardial infarction, or unstable angina.Severe arrhythmias that researchers consider clinically significant.Heart failure at NYHA class III-IV.Other acute serious complications that are life-threatening） * People with poorly controlled high blood pressure (defined as having a systolic pressure over 160mmHg or a diastolic pressure over 100mmHg despite treatment) * Poorly controlled diabetes (defined as blood sugar over 16.8 mmol/L during the screening period despite treatment) or hypoglycemia (blood sugar below 2.8 mmol/L during screening) * Select patients who have had esophageal or gastric variceal bleeding within the past 6 months, or those whom the investigator deems at risk of bleeding (if an endoscopy was done within the past 6 months, the results should be collected). * People with a history of immune deficiencies, including being HIV positive, having other acquired or congenital immune deficiencies, having idiopathic IgA deficiency, or who have taken systemic steroids (≥10 mg/day of prednisone equivalent) or immunosuppressive drugs within 14 days before the trial or are expected to need them during the trial. * Diagnosed with chronic obstructive pulmonary disease (COPD) and meets the GOLD 2026 Group E criteria * Patients who are currently receiving antiviral treatment for hepatitis C virus (HCV) or have received it within 12 months before screening. Patients whose antiviral treatment for hepatitis B virus (HBV) has been less than 12 months before screening. * Autoimmune hepatitis patients who received corticosteroid treatment in the past 6 months * People who underwent transjugular intrahepatic portosystemic shunt (TIPS) in the past 6 months * Patients with liver cirrhosis who have non-bacterial peritonitis caused by reasons other than SBP * Patients who are allergic to probiotic ingredients or can't take medicine orally * Patients with psychological or mental disorders who are unable to provide an accurate medical history or cooperate * Pregnant or breastfeeding women * Other researchers think these patients are not suitable