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Initial testing of a novel urine culture device
M Rosenberg1, S A Berger, M Barki
1Department of Human Microbiology, Sackler Faculty of Medicine, Tel-Aviv University, Israel.
Journal of Clinical Microbiology
|October 1, 1992
Summary
The Diaslide urine culture device offers a simple and effective method for bacterial detection in urine specimens. It demonstrates high accuracy and convenience, outperforming traditional dipslides in clinical settings.
Area of Science:
- Clinical Microbiology
- Medical Devices
- Diagnostic Technology
Background:
- Urine culture is essential for diagnosing urinary tract infections.
- Existing methods like dipslides and conventional cultures have limitations in accuracy and convenience.
- A need exists for improved, user-friendly urine culture devices.
Purpose of the Study:
- To evaluate the clinical performance of the Diaslide urine culture device.
- To compare the Diaslide's effectiveness against conventional dipslides and laboratory cultures.
- To assess the Diaslide's convenience for urine specimen sampling.
Main Methods:
- The Diaslide device utilizes hinged agar media and a unique sampler for direct urine inoculation.
- Clinical performance was assessed using 473 prescreened hospital urine specimens.
- Sensitivity, specificity, and positive predictive values were calculated at 10^4 and 10^5 CFU/ml cutoff levels.
Main Results:
- The Diaslide showed high sensitivity (97.5%) and specificity (98.3%) at the 10^4 CFU/ml cutoff.
- It demonstrated a linear correlation between colony counts and bacterial concentrations (CFU/ml).
- Fewer Diaslides required subculturing (5.5%) compared to dipslides (14.7%) and conventional cultures (9.4%).
Conclusions:
- The Diaslide is a simple, effective, and convenient device for urine specimen culture.
- Its performance is comparable or superior to existing methods.
- It is particularly advantageous for sampling low urine volumes.