Application of broad-spectrum, sequence-based pathogen identification in an urban population

Area of Science:

• Microbiology
• Genomics
• Public Health

Background:

• Broad-spectrum detection platforms offer significant public health and disease etiology insights.
• A prior respiratory pathogen microarray (RPM v.1) showed platform capability.

Purpose of the Study:

• To evaluate the performance of a newly developed respiratory pathogen microarray (RPM v.1).
• To compare RPM v.1 results against established reference assays for respiratory illness diagnosis.
• To assess the utility of RPM v.1 for pathogen identification, phylogenetic classification, and co-infection detection.

Main Methods:

• The RPM v.1 was used to analyze 424 nasal wash specimens from patients with febrile respiratory illness.
• RPM v.1 results were compared against a composite reference standard including viral/bacterial culture and PCR/RT-PCR.
• Sequence data from RPM v.1 enabled phylogenetic analysis of influenza A viruses.

Main Results:

• The RPM assay demonstrated >=98% overall agreement with reference methods across all detected organisms.
• Phylogenetic classification of influenza A viruses was achieved for ~250 specimens.
• Multiple pathogens (2-4) were detected in 13.7% of specimens, with increased S. pneumoniae during viral infections.

Conclusions:

• The RPM v.1 is a highly accurate broad-spectrum platform for simultaneous viral and bacterial identification.
• This technology is valuable for medical surveillance, understanding respiratory co-infections, and disease etiology.
• RPM v.1 provides sequence-level resolution, enabling genetic variation monitoring and phylogenetic analysis.