Biliary stones and bacteriae in bile study in 211 consecutive cases

Area of Science:

• Gastroenterology
• Microbiology
• Pathology

Background:

• Biliary stones are a common condition with diverse etiologies.
• The role of bacterial infection in gallstone formation remains incompletely understood, particularly for pigment stones.

Purpose of the Study:

• To investigate the correlation between bacteria in bile and the formation of various types of biliary stones.
• To determine if specific bacterial species are associated with particular stone compositions.

Main Methods:

• Retrospective analysis of 211 patients undergoing surgery for biliary stones between 1980 and 1987.
• Bacterial cultures of bile from the gallbladder and common bile duct during surgery.
• Morphological and component analysis of 5115 collected gallstones.

Main Results:

• Bacterial cultures were positive in a significant proportion of patients (gallbladder: 84, common bile duct: 31).
• Streptococci, Klebsiella, and Escherichia coli were the most frequently identified bacteria.
• A higher incidence of positive bacterial cultures was observed in patients with calcium bilirubinate stones compared to cholesterol stones.

Conclusions:

• Bacteria present in bile may play a significant role in the pathogenesis of pigment gallstones, specifically calcium bilirubinate stones.
• Further research is warranted to elucidate the precise mechanisms by which bacteria contribute to biliary stone formation.