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Coherent Fluctuation Nephelometry: A Rapid Method for Urine Screening for Bacterial Contamination
A S Gur'ev1, A Yu Volkov, I I Dolgushin
1Research Institute of Physicochemical Medicine, Federal Biomedical Agency of the Russian Federation, Moscow, Russia, coherneph@mail.ru.
Bulletin of Experimental Biology and Medicine
|June 2, 2015
Summary
Coherent fluctuation nephelometry offers a sensitive method for detecting urine contamination. This express test can identify up to 50% of negative urine samples within 10 minutes, aiding rapid diagnostics.
Area of Science:
- Clinical Chemistry
- Analytical Chemistry
- Microbiology
Background:
- Urine contamination detection is crucial for accurate diagnostics.
- Rapid and sensitive methods are needed for timely clinical decisions.
- Current methods may lack the speed or sensitivity for certain applications.
Purpose of the Study:
- To evaluate an express test for urine contamination using coherent fluctuation nephelometry.
- To assess the performance of prototype instruments in detecting bacterial presence in urine samples.
- To determine the time-efficiency and sensitivity of the nephelometry method for urine analysis.
Main Methods:
- Coherent fluctuation nephelometry was employed for urine sample analysis.
- Two prototype instruments utilizing standard polystyrene photometric cuvettes were used.
- A total of 328 urine samples (209 and 119) were analyzed.
Main Results:
- High sensitivity was observed, enabling detection of negative samples.
- Up to 50% of negative samples were identified within 10 minutes based on initial opacity.
- 90% of negative samples were detected within 3.5 hours by monitoring bacterial growth curves.
Conclusions:
- Coherent fluctuation nephelometry is a highly sensitive technique for detecting urine contamination.
- The express test provides rapid identification of negative samples, improving workflow efficiency.
- The method demonstrates potential for early detection of bacterial presence in urine samples.
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