Should the degree of peritoneal soiling and duration of perforation influence surgical strategy in perforated peptic ulcer?

Area of Science:

• Gastroenterology
• Microbiology
• Surgical Infections

Background:

• Perforated peptic ulcer (PPU) is a critical surgical emergency.
• Understanding the peritoneal microbial flora is crucial for effective management and antibiotic selection.
• The impact of peritoneal soiling duration and severity on bacterial contamination in PPU remains incompletely understood.

Purpose of the Study:

• To identify the predominant microorganisms in perforated peptic ulcer cases.
• To evaluate the correlation between the duration of peritoneal soiling and the encountered bacterial flora.
• To determine if the surgeon's assessment of peritoneal soiling severity correlates with bacterial contamination.

Main Methods:

• Prospective study design.
• Collection of pus swabs from patients with perforated peptic ulcer.
• Aerobic and anaerobic cultures, alongside antibiotic sensitivity testing.
• Assessment of peritoneal soiling degree by the surgeon and correlation with elapsed time.

Main Results:

• Gram-positive cocci (47%) were the most frequently isolated organisms, followed by Gram-negative organisms (33%).
• No statistically significant increase in bacterial growth was observed with peritoneal soiling duration up to 48 hours.
• Severe peritoneal soiling, as judged intraoperatively, did not correlate with higher bacterial contamination levels.

Conclusions:

• The microbial spectrum in perforated peptic ulcer infections is dominated by Gram-positive cocci and Gram-negative bacteria.
• Neither the duration nor the perceived severity of peritoneal soiling reliably predicts the extent of bacterial contamination.
• These findings underscore the importance of intraoperative cultures for guiding targeted antibiotic therapy in PPU.