TWENTY-THREE PEDIATRIC CASES OF CITROBACTER KOSERI MENINGITIS IN THE LAST 20 YEARS: STILL A DRAMATIC PROGNOSIS.

Among 7578 cases of pediatric bacterial meningitis recorded in France (2001-2021), including 1313 neonatal cases, 23/7578 (0.3%) and 18/1313 (1.4%) were due to Citrobacter koseri.

[Recommendations for clinical practice: Prevention and management of varicella zoster virus (VZV) infection during pregnancy and the perinatal period (extended version)].

The Société de Pathologie Infectieuse de Langue Française released in 2024 a new national recommendation for clinical practice on the prevention and management of varicella zoster virus (VZV) infection during pregnancy and the perinatal period. The previous recommendation was issued in 1998, at a time of anti-VZV immunoglobulins shortage; it has hence become obsolete. This recommendation is a formalized expert consensus focusing on infectious diseases management; it is drawn up by a multidisciplinary working group (infectiologists, obstetricians, pediatricians, microbiologists, midwives, hygienists).

Inoculum effect of cefiderocol against NDM-1 producing Escherichia coli in vitro and in a murine model of peritonitis.

Introduction: Cefiderocol is a siderophore cephalosporin active in vitro against carbapenemase-producing Enterobacterales, including New Delhi metallo-β-lactamases (NDM-1). A significant impact of the size of bacterial inoculum on its efficacy has been described in vitro, the clinical impact of which is unclear. Here, we analyse the inoculum effect of cefiderocol against E.

Network of epistatic interactions in an enzyme active site revealed by large-scale deep mutational scanning.

Cooperative interactions between amino acids are critical for protein function. A genetic reflection of cooperativity is epistasis, which is when a change in the amino acid at one position changes the sequence requirements at another position. To assess epistasis within an enzyme active site, we utilized CTX-M β-lactamase as a model system.