Improved performance of the modified Hodge test with MacConkey agar for screening carbapenemase-producing Gram-negative bacilli

Kyungwon Lee, Chang Ki Kim, Dongeun Yong, Seok Hoon Jeong, Jong Hwa Yum, Young Hee Seo, Jean Denis Docquier, Yunsop Chong

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46 Citations (Scopus)


The detection of carbapenemases in Gram-negative bacilli is important for optimal patient treatment and to control spread of the resistance. The modified Hodge test can detect carbapenemase-producing Gram-negative bacilli. In this study, we compared the performance of MacConkey agar and Mueller-Hinton agar for metallo-β-lactamase (MBL) and OXA carbapenemase screening. Overall, the performance of Hodge test was better with MacConkey agar due to enhanced release of β-lactamases from the cells in the presence of bile compounds. Concomitant use of the modified Hodge test could resolve most of the problems with uncertain double-disk synergy tests in MBL detection.

Original languageEnglish
Pages (from-to)149-152
Number of pages4
JournalJournal of Microbiological Methods
Issue number2
Publication statusPublished - 2010 Nov 1


All Science Journal Classification (ASJC) codes

  • Microbiology
  • Molecular Biology
  • Microbiology (medical)

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