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Simplified process for preparing native and depolymerized capsular polysaccharides of Streptococcus pneumoniae.
Carbohydr Polym
March 2025
Beijing Minhai Biotechnology Co. Ltd, Beijing 102600, China. Electronic address:
Streptococcus pneumoniae is a major pathogen of bacterial pneumonia, meningitis, sepsis, and otitis media. The pathogenicity of this bacterium is largely attributed to its polysaccharide capsule, a protective layer around bacterial cell that enables bacteria to resist against host defense. Capsular polysaccharides (CPSs) of S.
View Article and Find Full Text PDFInteractions of the Pneumococcus with the Central Nervous System: Postnatal Meningitis Versus Fetal Neurodevelopment.
J Pediatric Infect Dis Soc
January 2025
Department of Host-Microbe Interactions, St Jude Children's Research Hospital, Memphis, Tennessee, USA.
In young children, pneumococcal meningitis epitomizes the paradigm of a destructive innate inflammatory response in the central nervous system: a five-alarm fire. In contrast, cell-free bacterial components reaching the fetal brain from an infected mother signal a quiet, noninflammatory immune response that drives abnormal neurodevelopment, changing brain architecture through neuroproliferation. This review addresses the difference between prenatal and postnatal bacterial-host signaling within the brain.
View Article and Find Full Text PDFMetagenomic next-generation sequencing of cerebrospinal fluid: a diagnostic approach for varicella zoster virus-related encephalitis.
Front Cell Infect Microbiol
January 2025
Department of Neurology, Harrison International Peace Hospital, Hengshui, China.
Purpose: Varicella zoster virus-related encephalitis (VZV-RE) is a rare and often misdiagnosed condition caused by an infection with the VZV. It leads to meningitis or encephalitis, with patients frequently experiencing poor prognosis. In this study, we used metagenomic next-generation sequencing (mNGS) to rapidly and accurately detect and identify the VZV pathogen directly from cerebrospinal fluid (CSF) samples, aiming to achieve a definitive diagnosis for encephalitis patients.
View Article and Find Full Text PDFMedical Therapy Alone for Ommaya Reservoir-Associated Bacterial Meningitis: When It Works and When It Fails.
Neurosurgery
January 2025
Department of Neurosurgery, Hershey Medical Center, Hershey, Pennsylvania, USA.
Background And Objectives: Administration of intraventricular chemotherapy through Ommaya reservoir is indicated for certain forms of leptomeningeal disease. However, ventricular reservoirs carry a substantial risk of infection. The conventional approach to managing reservoir-associated infections involves removal of the reservoir and systemic antibiotic therapy, but this strategy necessitates additional procedures to remove and subsequently replace the device.
View Article and Find Full Text PDFProtective Antimicrobial Effect of the Potential Vaccine Created on the Basis of the Structure of the IgA1 Protease from .
Vaccines (Basel)
November 2024
Laboratory of Proteolytic Enzyme Chemistry, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, 117997 Moscow, Russia.
IgA1 protease is one of the virulence factors of , and other pathogens causing bacterial meningitis. The aim of this research is to create recombinant proteins based on fragments of the mature IgA1 protease A-P from serogroup B strain H44/76. These proteins are potential components of an antimeningococcal vaccine for protection against infections caused by pathogenic strains of and other bacteria producing serine-type IgA1 proteases.
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