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Evaluation of a rapid bacteriuria screening instrument.
Diagnostic Microbiology and Infectious Disease
|January 1, 1984
Summary
A new Bacteriuria Detection Device (BDD) offers rapid screening for urinary tract infections. While effective for high bacterial counts, further modifications are needed to improve accuracy for lower counts and reduce uninterpretable results.
Area of Science:
- Clinical diagnostics
- Microbiology
- Medical instrumentation
Background:
- Bacteriuria detection is crucial for diagnosing urinary tract infections.
- Rapid diagnostic tools are needed to supplement traditional urine culture methods.
- Existing methods can be time-consuming, delaying treatment decisions.
Purpose of the Study:
- To evaluate the performance of a novel, semiautomated Bacteriuria Detection Device (BDD).
- To compare the BDD's accuracy against quantitative urine culture plating.
- To assess the BDD's potential as a rapid screening tool for bacteriuria.
Main Methods:
- A modified, semiautomated instrument (BDD) utilizing vacuum-filtration-staining was employed.
- The BDD processed 1-ml urine samples, with color determining bacterial quantitation.
- A total of 525 clinical urine specimens were tested and compared to quantitative culture.
Main Results:
- The BDD achieved a detection rate of 94.2% for specimens with ≥10^5 CFU/ml of significant pathogens.
- Detection rates for lower bacterial counts (10^4-10^5 CFU/ml) were 41%.
- The device accurately identified 95.6% of specimens with no growth or <10^4 CFU/ml, but 12.6% were uninterpretable.
Conclusions:
- The Bacteriuria Detection Device (BDD) shows potential as a rapid urine screening tool.
- Proposed modifications may enhance its utility in specific patient populations.
- Further development is needed to address uninterpretable results and improve sensitivity for lower bacterial loads.