Bacterial contamination of pancreatic necrosis. A prospective clinical study
Abstract:
In a prospective clinical study including 114 patients with acute necrotizing pancreatitis, but excluding patients with a pancreatic abscess, necrotic material obtained at surgery was tested bacteriologically. Intestinal microorganisms were cultured in 39.4% of the cases. The contamination rate was 23.8% in patients operated on during the first 7 days of the attack; it rose to 71.4% in the third week and decreased to 32.5% after the fourth week. Intra- and extrapancreatic necrosis was more widespread and pancreatitis-associated ascites was more frequent in patients with proven contamination. The number of objective signs was 4.5 (median) and postoperative mortality was 37.8% in bacteriologically positive subjects, whereas the number was 3.5 (median) and mortality was 8.7% in bacteriologically negative patients. Morphologic and clinical alterations were more severe, and the mortality rate was significantly elevated, in patients with a short history of disease and bacterial contamination of necrotic tissue. All 5 patients with pancreatic sepsis who were operated on in the first 7 days of the disease, as compared with 2 of 16 patients with sterile necrosis, died. Thus, it is demonstrated that bacterial contamination of pancreatic necrosis occurs early and frequently, causing a significant increase in morbidity and mortality, particularly when it develops in the initial stages of the attack.
Insights
Bacterial contamination of pancreatic necrosis is common in acute necrotizing pancreatitis. Early contamination significantly increases patient morbidity and mortality, highlighting the need for timely intervention.
Area of Science:
- Gastroenterology
- Infectious Diseases
- Surgical Pathology
Background:
- Acute necrotizing pancreatitis is a severe condition with high morbidity and mortality.
- Bacterial infection of necrotic pancreatic tissue is a known complication.
- The timing and impact of bacterial contamination require further elucidation.
Purpose of the Study:
- To investigate the incidence and timing of bacterial contamination in acute necrotizing pancreatitis.
- To assess the correlation between bacterial contamination and clinical outcomes, including severity and mortality.
- To determine the impact of early-stage contamination on patient prognosis.
Main Methods:
- Prospective clinical study of 114 patients with acute necrotizing pancreatitis (excluding pancreatic abscess).
- Bacteriological testing of surgical necrotic material.
- Analysis of contamination rates based on time from disease onset.
- Correlation of microbiological findings with clinical severity and postoperative mortality.
Main Results:
- Intestinal microorganisms were cultured in 39.4% of patients.
- Contamination rates varied significantly with time: 23.8% within the first week, 71.4% in the third week, and 32.5% after the fourth week.
- Bacteriologically positive patients exhibited more widespread necrosis, increased ascites, higher median objective signs (4.5 vs. 3.5), and significantly higher postoperative mortality (37.8% vs. 8.7%).
- Early-stage bacterial contamination (within 7 days) was associated with severe clinical alterations and a particularly elevated mortality rate, with all 5 patients with pancreatic sepsis in this group dying.
Conclusions:
- Bacterial contamination of pancreatic necrosis occurs early and frequently in acute necrotizing pancreatitis.
- This contamination significantly increases morbidity and mortality.
- Early-stage bacterial contamination poses the greatest risk, underscoring the critical importance of timely diagnosis and management.
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