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Related Experiment Video

Updated: Jun 18, 2026

Air-sampled Filter Analysis for Endotoxins and DNA Content

Air-sampled Filter Analysis for Endotoxins and DNA Content

Published on: March 7, 2016

Endotoxin as a Marker for Water Quality.

Anas A Sattar¹, Christian R Good¹, Margaux Saletes¹

¹Molendotech Limited, Brixham Laboratory, Blackball Lane, Freshwater Quarry, Brixham TQ5 8BA, UK.

International Journal of Environmental Research and Public Health

|December 23, 2022

Summary

Rapid water quality testing is now possible using the BacterisK assay, which detects endotoxin as a marker for Escherichia coli (E. coli) contamination. This method provides near real-time results, crucial for public health, especially where lab access is limited.

Keywords:

BacterisK LAL assay drinking water endotoxin faecal contamination water testing

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Area of Science:

Environmental Science
Microbiology
Public Health

Background:

Water quality testing is critical for human health protection.
Current methods rely on slow culture-based detection of Escherichia coli (E. coli), often inaccessible in developing nations.
Endotoxin, a component of Gram-negative bacteria, offers an alternative detection marker.

Purpose of the Study:

To evaluate a novel BacterisK assay for rapid endotoxin detection in water.
To correlate BacterisK assay results with E. coli levels determined by traditional culture methods.
To assess the utility of endotoxin as a marker for fecal contamination.

Main Methods:

Utilized the BacterisK assay to detect endotoxin in diverse water samples.
Quantified E. coli using standard culture-based methods for comparison.
Presented BacterisK data as an 'endotoxin risk' (ER) value.

Main Results:

Endotoxin Risk (ER) values from the BacterisK assay showed a strong correlation with E. coli content.
Endotoxin serves as a reliable indicator of fecal contamination in water.
The BacterisK assay delivers near real-time, in-situ results, enabling flexible spatial and temporal water quality monitoring.

Conclusions:

The BacterisK assay is a valuable tool for rapid water quality risk assessment.
This assay is particularly useful in resource-limited settings or when immediate results are necessary.
BacterisK facilitates timely interventions to mitigate risks associated with poor water quality.