Development of a PCR assay for rapid and accurate detection of an emerging clone in the Capital Region of Denmark.

Objectives: To develop and validate a real-time PCR assay detecting the sequence bridging Tn and the chromosome in the emerging vancomycin-resistant (VREfm) clone (ST80/CT2406).

Methods: The Tn insertion site was determined on routinely sequenced VREfm isolates. The outer boundaries of Tn and adjoining host bacterial sequences were determined using a BLAST search in the silent information regulator gene .

Surveillance of vancomycin-resistant enterococci reveals shift in dominating clusters from to clusters, Denmark, 2015 to 2022.

BackgroundVancomycin-resistant enterococci (VRE) are increasing in Denmark and Europe. Linezolid and vancomycin-resistant enterococci (LVRE) are of concern, as treatment options are limited. Vancomycin-variable enterococci (VVE) harbour the gene complex but are phenotypically vancomycin-susceptible.

Predicting the primary infection source of Escherichia coli bacteremia using virulence-associated genes.

Purpose: To investigate the role of E. coli virulence-associated genes (VAGs) in predicting urinary tract infection (UTI) as the source of bacteremia in two distinct hospital populations, one with a large general catchment area and one dominated by referrals.

Methods: E.

Within-host genomic evolution of methicillin-resistant Staphylococcus aureus in long-term carriers.

Assessing the genomic evolution of Staphylococcus aureus can help us understand how the bacteria adapt to its environment. In this study, we aimed to assess the mutation rate within 144 methicillin-resistant Staphylococcus aureus (MRSA) carriers with a carriage time from 4 to 11 years, including some carriers who belonged to the same households. We found that 23 of the 144 individuals had completely different MRSA types over time and were therefore not long-term carriers of the same MRSA.