Antibiotic Resistance and Presence of Persister Cells in the Biofilm-like Environments in .

This study investigated antibiotic resistance and presence of persister cells in strains belonging to capsular types Ia/ST-103, III/ST-17, and V/ST-26 in biofilm-like environments. strains were susceptible to penicillin, clindamycin, and erythromycin. Resistance genes were associated with M (80%), O (20%), B (80%), and B (40%).

Molecular characterization, antimicrobial resistance and invasion of epithelial cells by Streptococcus agalactiae strains isolated from colonized pregnant women and newborns in Rio de Janeiro, Brazil.

Aims: To evaluate the prevalence, molecular characteristics, antimicrobial susceptibility, and epithelial invasion of Streptococcus agalactiae strains isolated from pregnant women and newborns in Rio de Janeiro, Brazil.

Methods And Results: A total of 67 S. agalactiae isolates, 48 isolates from pregnant women and 19 from neonates, were analyzed.

RdJ detection tests to identify a unique MRSA clone of ST105-SCCII lineage and its variants disseminated in the metropolitan region of Rio de Janeiro.

Hospital bloodstream infection (BSI) caused by methicillin-resistant (MRSA) is a major cause of morbidity and mortality and is frequently related to invasive procedures and medically complex patients. An important feature of MRSA is the clonal structure of its population. Specific MRSA clones may differ in their pathogenic, epidemiological, and antimicrobial resistance profiles.

Lineage ST62/87: The International Spread of This Potentially Invasive Lineage.

is known to be associated with a variety of infections, from pharyngitis to necrotizing fasciitis (flesh-eating disease). of the ST62/87 lineage is recognized as one of the most frequently isolated lineages of invasive infections caused by this bacterium, which may be involved in hospital outbreaks and cluster infections. Despite this, comparative genomic and phylogenomic studies have not yet been carried out for this lineage.

High frequency of increased triclosan MIC among CC5 MRSA and risk of misclassification of the SCCmec into types.

Background: Typing of staphylococcal cassette chromosome mec (SCCmec) elements is commonly used for studies on the molecular epidemiology of MRSA.

Objectives: To perform an investigation centred on uncovering the reasons for misclassification of MRSA clonal complex 5 (CC5) SCCmec type II clinical isolates in our laboratory.

Methods: MRSA isolates from CC5 were subjected to WGS and SCCmec typing.