Assessing the colony morphotypes and antibiotic susceptibility profile of Malaysian clinical Burkholderia pseudomallei to support the use of EUCAST disk diffusion breakpoints to determine antibiotic resistance

Author:

Hii Shirley Yi Fen,Zaiful Bahrina Nurul Naziha,Mohd Zaidi Maswani Nabilah,Hashim Rohaidah,Ahmad Norazah

Abstract

AbstractBurkholderia pseudomallei is intrinsically resistant to many antibiotics. This study aimed to assess bacterial colony morphotypes and the validity of using disk diffusion method (DD) to determine antibiotic resistance in Malaysian clinical B. pseudomallei isolates for ceftazidime (CAZ), meropenem (MEM), amoxicillin-clavulanate (AMC) and doxycycline (DOX). DD produced good categorical agreements exhibiting concordance of 100% with reference method, broth microdilution for CAZ and DOX, 98.6% for MEM and 97.2% for AMC. Smooth-centred colonies were most frequently observed. EUCAST DD interpretative criterion is suitable to interpret B. pseudomallei CAZ, MEM, AMC and DOX resistance. Increasing AMC MIC in B. pseudomallei is a concern.

Publisher

Springer Science and Business Media LLC

Subject

Infectious Diseases,Microbiology (medical),General Medicine

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