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This study presents an automated, high-throughput method for quantifying antibacterial activity using turbidity measurements. The new assay accurately measures lysostaphin

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Area of Science:

  • Microbiology
  • Biotechnology
  • Analytical Chemistry

Background:

  • Conventional antibacterial assays lack quantitative reliability and are not suitable for high-throughput screening.
  • There is a need for rapid, accurate, and scalable methods to quantify antibacterial agents.

Purpose of the Study:

  • To develop and validate an automated, high-throughput turbidity-based assay for quantifying antibacterial activity.
  • To apply this method for measuring the activity of lysostaphin, an anti-staphylococcal agent.

Main Methods:

  • Automation of a turbidity-based assay using standard laboratory equipment.
  • Bayesian data analysis for accurate and precise quantification.
  • Monitoring optical density changes to detect bacterial lysis induced by lysostaphin.

Main Results:

  • The automated assay provides accurate and precise quantification of antibacterial activity.
  • Optimized assay conditions demonstrated a dynamic range of 0.63-10 mg L-1 for lysostaphin.
  • Validated Staphylococcus carnosus TM300 as a suitable indicator strain.

Conclusions:

  • The developed assay is a robust, scalable, and reproducible platform for quantifying active lysostaphin.
  • This approach facilitates high-throughput screening and process development for antibacterial agents.
  • The method is adaptable to other turbidity-based assays, including those for endolysin activity.