Real-Time Multipathogen Biosensing: The Future of Aquatic Water Safety
- Waterborne pathogen surveillance for public health is shifting from periodic single-target testing toward rapid, online monitoring of multiple pathogens in near real time, according to a perspective published...
- Current aquatic monitoring methods often prove too slow or too narrowly focused to provide rapid warnings of emerging biological risks.
- To bridge the gap between periodic lab testing and continuous surveillance, the perspective highlights several emerging sensor technologies.
Waterborne pathogen surveillance for public health is shifting from periodic single-target testing toward rapid, online monitoring of multiple pathogens in near real time, according to a perspective published in the journal Biocontaminant by researchers at Shenyang Agricultural University.
Limitations of Traditional Aquatic Testing
Current aquatic monitoring methods often prove too slow or too narrowly focused to provide rapid warnings of emerging biological risks. While conventional culture techniques continue to play an essential role in assessing microbial viability, PCR and sequencing methodologies supply high sensitivity along with in-depth characterization. However, these conventional approaches commonly depend on sample collection, laboratory processing, specialized instruments, and subsequent analysis. Such requirements limit their use for continuous in situ monitoring, creating a critical gap in early warning systems.
The key challenge is no longer simply detecting pathogens with greater sensitivity, but increasing monitoring frequency and expanding surveillance from individual targets to multiple priority pathogens in near real time,
the authors stated in the Biocontaminant paper.
Emerging Biosensor Technologies
To bridge the gap between periodic lab testing and continuous surveillance, the perspective highlights several emerging sensor technologies. Nanobody-based recognition combined with fiberoptic sensors could enable rapid first-line screening of several predefined pathogens. Meanwhile, functional nucleic acid probes, including aptamers and deoxyribozymes, could provide more specific secondary analysis. Microfluidic platforms offer further potential by automating sample handling and parallel detection.
The proposed framework combines automated sampling, pathogen concentration, multiplex recognition, rapid signal detection, data analysis, and early warning into an integrated system. Culture, PCR, and sequencing would remain available for confirmation and deeper characterization when necessary. Rather than replacing established laboratory methods, the authors envision biosensors as complementary tools that shorten response times and strengthen early warning networks.
Operational Challenges in Deployment
Practical deployment requires overcoming substantial obstacles beyond high sensor sensitivity. Continuous aquatic monitoring continues to face significant barriers regarding sensor drift, calibration, cross-reactivity, low pathogen concentrations, complex water matrices, biofouling, and long-term operational stability. Successfully integrating these biosensing technologies into reliable multipathogen surveillance networks could ultimately improve aquatic biosafety and support faster management of waterborne biological risks.