In cholangitis, the organism mostly responsible is
Ascending bacterial infection of the biliary ductal system with obstruction Most common cause is choledocholithiasis Most common organisms present in the bile in patients with cholangitis : E.coli (MC). Klebsiella pneumoniae, streptococcus faecalis & Bacteroides fragilis Ref: Sabiston 20th edition Pgno :1507
E.coli
Streptococcus
E.histolytica
Clostridium
G.I.T