Prospective Investigation of an Automated PCR/Nucleic Acid Microarray-Based Platform for Enteric Pathogen Testing

Area of Science:

• Clinical microbiology
• Molecular diagnostics
• Gastroenterology

Background:

• Diarrhea is a significant cause of morbidity, often due to enteric pathogens.
• The Verigene Enteric Pathogens Test utilizes polymerase chain reaction (PCR) and nucleic acid microarray technology.
• This assay targets eight common bacterial and viral causes of diarrheal illness.

Purpose of the Study:

• To evaluate the performance of the Verigene Enteric Pathogens Test (EP).
• To compare the diagnostic accuracy of the PCR/microarray assay against traditional stool culture methods.
• To assess the utility of Verigene EP for identifying enteric pathogens in clinical stool samples.

Main Methods:

• A total of 3795 stool specimens were analyzed between February and August 2016.
• Specimens were tested using the Verigene EP (PCR/microarray) assay.
• Parallel testing included culture for Salmonella and Shigella, with confirmatory cultures for positive bacterial results.

Main Results:

• The Verigene EP assay yielded valid results for 99.3% of specimens.
• 13.2% of samples tested positive for at least one pathogen via PCR/microarray.
• High agreement (85.3%) was observed between bacterial PCR/microarray results and culture.
• Sensitivity and specificity for Salmonella and Shigella were high, with notable performance for both pathogens.

Conclusions:

• The Verigene Enteric Pathogens Test provides reliable results for the majority of stool specimens.
• The PCR/microarray assay demonstrates strong concordance with conventional bacterial culture methods.
• Verigene EP represents an effective molecular diagnostic tool for enteric pathogen detection.