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Updates in bacteriological epidemiology of community-acquired severe acute cholangitis and the effectiveness of metronidazole added routinely to the first-line antimicrobial regimen
Authors:Jun Kyu Lee  Chang Wook Park  Sang Hyub Lee  Hyoun Woo Kang  Jae Hyun Kwon  Jae Hak Kim  Yun Jeong Lim  Eu Suk Kim  Moon-Soo Koh  Jin Ho Lee
Affiliation:1. Department of Internal Medicine, Dongguk University Ilsan Hospital, College of Medicine, Dongguk University, 814 Siksa-dong, Ilsandong-gu, Goyang, 410-773, Korea
2. Department of Internal Medicine, Mokpo Jungang Hospital, Mokpo, Korea
3. Department of Internal Medicine and Liver Research Institute, Seoul National University Hospital, College of Medicine, Seoul National University, 101 Daehak-ro, Jongno-gu, Seoul, 110-744, Korea
4. Department of Radiology, Dongguk University Ilsan Hospital, College of Medicine, Dongguk University, Goyang, Korea
5. Department of Internal Medicine, Seoul National University Bundang Hospital, College of Medicine, Seoul National University, Seongnam, Korea
Abstract:Prompt antimicrobial therapy, together with subsequent biliary drainage, is crucial to prevent the rapidly deteriorating course of severe acute cholangitis. Therefore, updates in bacteriological epidemiology and resistance profile are important for management of this critical disease. Also, because the routine addition of metronidazole to the first-line regimen is controversial, we intended this prospective study with historical controls. Patients with severe acute cholangitis who fulfilled the definition of severity by the Tokyo Guidelines and underwent biliary drainage within 24 h from presentation were enrolled prospectively from January 2010 to December 2011. During that period, metronidazole was not added to third-generation cephalosporins, which were used as the initial antimicrobials except for patients who were allergic to penicillin and received ciprofloxacin instead (no metronidazole group). Outcomes were compared with a historical cohort from March 2007 to December 2009 when metronidazole was added routinely (metronidazole group). A unified strategy was maintained throughout the whole period excepting the use of metronidazole. Outcomes between the metronidazole group (n = 338) and the no metronidazole group (n = 338) did not differ in terms of the rate of successful biliary drainage by interventional procedures (93.2 % vs. 94.7 %, p = 0.88), time elapsed for cholangitis to be controlled (10.4 ± 0.6 vs. 8.9 ± 1.2 days, p = 0.38), and mortality (1.2 % vs. 0.6 % with p = 0.34 for all causes and 0.9 % vs. 0 % with p = 0.15 for cholangitis-related, respectively). As the routine addition of metronidazole did not improve outcomes, it can be excluded from the first-line regimen if emergent biliary drainage can be performed efficiently.
Keywords:Acute cholangitis  Cephalosporin  Metronidazole  Drug resistance  Biliary drainage
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