A patient of post-cholecystectomy biliary stricture has undergone an ERCP three days ago. Following this she has developed acute cholangitis. Which of the following is the most likely organism causing acute cholangitis?
The most common organisms implicated in acute cholangitis are Escherichia coli (27%), Klebsiella species (16%), Enterobacter, Streptococcus viridans (8%), Enterococcus and anaerobes. Ref: CURRENT Diagnosis and Treatment: Gastroenterology, Hepatology and Endoscopy, 2nd Edition, Chapter 32.
Bacillus fragilis
Escherichia coli
Streptococcus viridans
Pseudomonas aeuroginosa