Rapid bead-based antimicrobial susceptibility testing by optical diffusometry

Chih Yao Chung, Jhih Cheng Wang, Han Sheng Chuang

研究成果: Article同行評審

26 引文 斯高帕斯(Scopus)


This study combined optical diffusometry and bead-based immunoassays to develop a novel technique for quantifying the growth of specific microorganisms and achieving rapid AST. Diffusivity rises when live bacteria attach to particles, resulting in additional energy from motile microorganisms. However, when UV-sterilized (dead) bacteria attach to particles, diffusivity declines. The experimental data are consistent with the theoretical model predicted according to the equivalent volume diameter. Using this diffusometric platform, the susceptibility of Pseudomonas aeruginosa to the antibiotic gentamicin was tested. The result suggests that the proliferation of bacteria is effectively controlled by gentamicin. This study demonstrated a sensitive (one bacterium on single particles) and time-saving (within 2 h) platform with a small sample volume (∼0.5 μL) and a low initial bacteria count (50 CFU per droplet ∼ 105 CFU/mL) for quantifying the growth of microorganisms depending on Brownian motion. The technique can be applied further to other bacterial strains and increase the success of treatments against infectious diseases in the near future.

期刊PloS one
出版狀態Published - 2016 2月

All Science Journal Classification (ASJC) codes

  • 一般生物化學,遺傳學和分子生物學
  • 一般農業與生物科學
  • 多學科


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