A patient of post-cholecystectomy biliary stricture has undergone an ERCP three days ago. Following this she has developed acute cholangitis. The most likely organism is
Escherichia colli
Bacillus fragilis
Streptococcus viridans
Pseudomonas aerogenosa
The most common bacteria linked to ascending /acute cholangitis is Escherichia coli(25-50%),followed by other gram negative bacilli like Klebsiella(15-20%),proteus and pseudomonas.Among gram positive,enterococcus is common(10-20%)and anaerobes like Clostridium. Reference:SRB's manual of surgery,5th edition,page no:643
G.I.T