Broad-range PCR: past, present, or future of bacteriology?

Area of Science:

• Microbiology
• Molecular Biology
• Clinical Diagnostics

Background:

• Broad-range PCR, targeting the 16S ribosomal RNA gene, has been a versatile tool in prokaryotic studies for two decades.
• Initially used for bacterial taxonomy, its application expanded to clinical microbiology.

Purpose of the Study:

• To review the applications of broad-range PCR in clinical microbiology.
• To discuss its utility in identifying difficult-to-identify bacterial strains and detecting bacterial DNA in clinical samples.
• To synthesize data on the advantages and disadvantages of broad-range PCR in clinical settings.

Main Methods:

• Review of existing literature on broad-range PCR applications in clinical microbiology.
• Analysis of case studies and clinical settings where 16S PCR has been applied.
• Synthesis of data regarding identification of bacterial strains and direct detection of bacterial DNA.

Main Results:

• Broad-range PCR facilitates the identification of bacterial strains with challenging phenotypic or proteomic profiles, aiding in the discovery of new species.
• The technique is effective for detecting bacterial DNA in specific clinical samples, such as those from endocarditis cases, leading to the identification of etiological agents like in Whipple disease.
• Its utility is limited in certain settings, such as characterizing bacteria in ascites from cirrhotic patients.

Conclusions:

• Broad-range PCR is a valuable tool in clinical microbiology for bacterial identification and direct pathogen detection.
• The technique has significantly impacted bacterial taxonomy and the diagnosis of infectious diseases.
• Understanding its specific applications, assets, and drawbacks is crucial for optimal clinical use.