ABSTRACT
Molecular detection of viral infections has the potential to improve microbial diagnostics, particularly with the emergence of rapid automated systems. We describe the design of the IDbox fully automated cassette-based system for nucleic acid extraction and real-time PCR amplification and perform a clinical evaluation for the diagnosis of genital herpes simplex infections. At optimal cutoff values determined by receiver-operator curves, the IDbox showed sensitivities of 94.9% (95% confidence interval [CI] 84.9-98.7%) and 97.0% (95% CI 88.5-99.5%) and specificities of 96.7% (95% CI 91.2-98.9%) and 97.3% (95% CI 91.9-99.3%) relative to herpes simplex virus culture and PCR, respectively. We discuss relevant design characteristics and approaches used for each step of the analytical process to enhance assay sensitivity and provide accurate results in the presence of potential cross-reactive organisms and interfering substances.
