Evaluation of repetitive element sequence-based PCR as a molecular typing method for Clostridium difficile

Area of Science:

• Microbiology
• Molecular Biology
• Infectious Diseases

Background:

• Bacterial strain typing is crucial for understanding infection transmission and epidemiology.
• Clostridium difficile is a significant cause of healthcare-associated infections.
• Accurate and discriminatory typing methods are needed for Clostridium difficile surveillance.

Purpose of the Study:

• To evaluate the utility of repetitive element sequence-based PCR (rep-PCR) for typing clinical isolates of Clostridium difficile.
• To compare the discriminatory power of rep-PCR with established methods like pulsed-field gel electrophoresis (PFGE) and PCR ribotyping.

Main Methods:

• Repetitive element sequence-based PCR (rep-PCR) was performed on Clostridium difficile clinical isolates.
• DNA fingerprinting patterns generated by rep-PCR were compared to those from PFGE and PCR ribotyping.
• The discriminatory power of each method was assessed based on pattern differentiation.

Main Results:

• Repetitive element sequence-based PCR (rep-PCR) generated distinct DNA fingerprints for Clostridium difficile strains.
• A high degree of correspondence was observed between the strain differentiation patterns produced by rep-PCR and PFGE.
• PCR ribotyping demonstrated a lower discriminatory power compared to both rep-PCR and PFGE.

Conclusions:

• Repetitive element sequence-based PCR (rep-PCR) is a highly applicable and discriminatory method for typing Clostridium difficile clinical isolates.
• Rep-PCR offers comparable discriminatory power to PFGE for Clostridium difficile strain typing.
• Rep-PCR represents a valuable tool for epidemiological surveillance and outbreak investigations of Clostridium difficile infections.