[The comparative evaluation of informativity of methods of etiologic diagnostics of community-acquired pneumonia]

Area of Science:

• Microbiology
• Molecular Biology
• Clinical Diagnostics

Background:

• Community-acquired pneumonia (CAP) is a significant global health concern.
• Accurate and rapid diagnosis of CAP is crucial for effective treatment.
• Current diagnostic methods, while effective, can be time-consuming.

Purpose of the Study:

• To select and test oligonucleotide primers for the 16S rRNA gene of key CAP pathogens.
• To develop a highly specific polymerase chain reaction (PCR) assay for detecting these pathogens in clinical samples.
• To evaluate the diagnostic performance of the developed PCR assay compared to the traditional bacteriological method.

Main Methods:

• Selection and optimization of oligonucleotide primers targeting the 16S rRNA gene of Streptococcus pneumoniae, Haemophilus influenzae, Moraxella catarrhalis, Klebsiella pneumoniae, Pseudomonas aeruginosa, and Staphylococcus aureus.
• Development and validation of a multiplex PCR assay for simultaneous detection of these pathogens.
• Comparison of PCR results with conventional bacteriological methods (gold standard) using clinical materials.

Main Results:

• The selected oligonucleotide primers demonstrated high specificity for the target CAP pathogens.
• The developed PCR assay exhibited high sensitivity, specificity, and overall diagnostic effectiveness.
• The PCR method successfully detected pathogens in clinical samples, outperforming or matching the gold standard in key metrics.

Conclusions:

• The developed PCR assay using specific oligonucleotide primers is a sensitive and effective tool for diagnosing community-acquired pneumonia.
• This molecular diagnostic approach can be applied in clinical practice across various disease durations, severities, and phases.
• The findings support the development of advanced diagnostic systems for CAP based on molecular detection methods.