Biosensor for Bacterial Detection Through Color Change in Culture Medium

Area of Science:

• Biotechnology
• Biosensing
• Microbiology

Background:

• Accurate bacterial detection is crucial for public health and industry.
• Traditional methods are time-consuming, delaying critical interventions.
• Need for rapid, sensitive, and cost-effective detection systems.

Purpose of the Study:

• To develop and validate an optical sensor for rapid bacterial detection.
• To leverage colorimetric changes in culture media for microbial identification.
• To provide an efficient alternative for early pathogen detection.

Main Methods:

• Utilized optical transmittance through mannitol salt agar (ASM).
• Employed simplified light-emitting diodes (LEDs) for specific wavelength illumination.
• Monitored color and thickness changes in the culture medium due to bacterial growth.

Main Results:

• Achieved bacterial detection within 90-120 minutes.
• Demonstrated high sensitivity and low reagent consumption (up to 140 fewer reagents per test).
• Showcased potential for real-time monitoring and simplified sensor design.

Conclusions:

• The optical sensor offers a significant reduction in bacterial detection time.
• The system is simple, sensitive, and cost-effective.
• Viable for early pathogen detection in clinical and industrial settings.