High-throughput quantification of population dynamics using luminescence.

Luminescence accurately measures bacterial population decline in Escherichia coli for half of 20 antimicrobials tested, offering a high-throughput alternative to CFU counting.

• Why it matters: Understanding bacterial decline at antibiotic levels above MIC is critical but hampered by the slow, costly, and labor-intensive nature of CFU methods, limiting large-scale studies and rapid assessments.
• What they did: The study compared luminescence and CFU-based rates across 20 antimicrobials, revealing that luminescence closely matched CFU estimates for half of the drugs, while discrepancies arose due to physiological effects and measurement differences.
• The result: Findings suggest luminescence can serve as an efficient, high-throughput tool for monitoring bacterial dynamics at super-MIC concentrations, with its accuracy depending on antimicrobial effects and the specific quantity measured.