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Plasma ddPCR for etiological diagnosis of focal bacterial infections
Yongfeng Zhang1, ShanShan Weng2,3,4, Xueqing Ma2,3,4
1Department of Infectious Diseases, Jiangshan People's Hospital, Quzhou, China.
Background:
Plasma droplet digital polymerase chain reaction (ddPCR) has been used for pathogen detection and has shown good diagnostic value, but no studies have yet demonstrated its application in focal infections. Herein a pilot study using plasma ddPCR to diagnose focal infection is discussed.
Methods:
Eight patients with a diagnosed focal infection who underwent plasma ddPCR for bacterial detection between 2021 and 2022 in Sir Run Run Shaw hospital were enrolled in this retrospective single-center pilot study. Results of ddPCR and focal cultures were compared as well as the turnaround time of two methods and other clinical data.
Results:
In 7/8 cases, plasma ddPCR results were consistent with focal culture results. The turnaround time for ddPCR was 2.5 h, significantly lower than the average time for focal cultures of 2.63 days.
Conclusion:
This pilot study indicates the promising value of the plasma ddPCR method in the rapid diagnosis of focal infection. If larger studies support the findings here, this method can help improve diagnostic accuracy and guide treatment decisions in suspected focal infections.
Insights
Plasma droplet digital PCR (ddPCR) shows promise for rapidly diagnosing focal infections. This method offers faster results than traditional cultures, potentially improving patient care.
Area of Science:
- Infectious Diseases
- Molecular Diagnostics
- Clinical Microbiology
Background:
- Plasma droplet digital polymerase chain reaction (ddPCR) is established for pathogen detection.
- Its utility in diagnosing focal infections remains underexplored.
Purpose of the Study:
- To evaluate the diagnostic value of plasma ddPCR for bacterial detection in focal infections.
- To compare plasma ddPCR with traditional focal cultures.
Main Methods:
- Retrospective pilot study of 8 patients with focal infections.
- Plasma ddPCR for bacterial detection compared against focal cultures.
- Turnaround time and clinical data were analyzed.
Main Results:
- Plasma ddPCR demonstrated concordance with focal cultures in 7 out of 8 cases.
- ddPCR turnaround time was 2.5 hours, significantly faster than focal cultures (2.63 days).
Conclusions:
- Plasma ddPCR is a promising tool for rapid focal infection diagnosis.
- This method may enhance diagnostic accuracy and guide treatment decisions.
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