Adaptation and validation of a quantitative vanA/vanB DNA screening assay on a high-throughput PCR system.

ABSTRACT: Vancomycin resistant enterococci (VRE) are a leading cause of ICU-acquired bloodstream infections in Europe. The bacterial load in enteral colonization may be associated with a higher probability of transmission. Here, we aimed to establish a quantitative vanA/vanB DNA real-time PCR assay on a high-throughput system. Limits of detection (LOD), linear range and precision were determined using serial bacterial dilutions. LOD was 46.9 digital copies (dcp)/ml for vanA and 60.8 dcp/ml for vanB. The assay showed excellent linearity between 4.7 × 10¹ and 3.5 × 10⁵ dcp/ml (vanA) and 6.7 × 10² and 6.7 × 10⁵ dcp/ml (vanB). Sensitivity was 100% for vanA and vanB, with high positive predictive value (PPV) for vanA (100%), but lower PPV for vanB (34.6%) likel

SUBMITTER: Giersch K 

PROVIDER: S-EPMC10861526 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature