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Microbial DNA Profiles of Bacterial Extracellular Vesicles from 3D Salivary Polymicrobial Biofilms - A Pilot Study.
Adv Healthc Mater
January 2025
School of Dentistry, Center for Oral-facial Regeneration, Rehabilitation and Reconstruction (COR3), Epigenetics nanodiagnostic and therapeutic group, The University of Queensland, Brisbane, QLD, 4006, Australia.
With the advent of multi-layered and 3D scaffolds, the understanding of microbiome composition and pathogenic mechanisms within polymicrobial biofilms is continuously evolving. A fundamental component in mediating the microenvironment and bacterial-host communication within the biofilm are bilayered nanoparticles secreted by bacteria, known as bacterial extracellular vesicles (BEVs), which transport key biomolecules including proteins, nucleic acids, and metabolites. Their characteristics and microbiome profiles are yet to be explored in the context of in vitro salivary polymicrobial biofilm.
View Article and Find Full Text PDFRevisiting Socransky's Complexes: A Review Suggesting Updated New Bacterial Clusters (GF-MoR Complexes) for Periodontal and Peri-Implant Diseases and Conditions.
Microorganisms
October 2024
Private Researcher, St. Louis, MO 63104, USA.
This review aimed to identify newly discovered bacteria from individuals with periodontal/peri-implant diseases and organize them into new clusters (GF-MoR complexes) to update Socransky's complexes (1998). For methodological development, the PCC (Population, Concept, Context) strategy was used for the focus question construction: "In patients with periodontal and/or peri-implant disease, what bacteria (microorganisms) were detected through laboratory assays?" The search strategy was applied to PubMed/MEDLINE, PubMed Central, and Embase. The search key terms, combined with Boolean markers, were (1) bacteria, (2) microbiome, (3) microorganisms, (4) biofilm, (5) niche, (6) native bacteria, (7) gingivitis), (8) periodontitis, (9) peri-implant mucositis, and (10) peri-implantitis.
View Article and Find Full Text PDFRelationship Between the Presence of Red Complex Species and the Distribution of Other Oral Bacteria, Including Major Periodontal Pathogens in Older Japanese Individuals.
Int J Mol Sci
November 2024
Department of Pediatric Dentistry, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima 734-8553, Japan.
Article Synopsis
- Red complex bacteria are highly virulent in periodontal disease, and this study focused on their relationships with other oral bacteria in older Japanese individuals.
- Polymerase chain reaction was used to analyze dental plaque from 116 subjects, finding that individuals positive for red complex bacteria had significantly higher detection rates of certain periodontal pathogens compared to those who were negative.
- The findings indicate that individuals harboring all three red complex species have a unique oral microbiome, showcasing greater α-diversity and lower β-diversity, suggesting they may be more prone to developing periodontal disease.
Blood culture-negative endocarditis with large vegetation and the role of bronchoalveolar lavage: a case report.
Eur Heart J Case Rep
October 2024
Hôpital du Valais, Service de Cardiologie, Avenue Grand-Champsec 80, 1951 Sion, Switzerland.
Article Synopsis
- - Blood culture-negative endocarditis (BCNE) occurs alongside conditions like sepsis and autoimmune diseases, and can lead to significant cardiac issues due to bacterial vegetation; common pathogens include certain types of
- Enterococcus
- and
- Streptococcus
- species.
- - A 60-year-old man with severe aortic stenosis and chronic infections was diagnosed with BCNE, confirmed through imaging and subsequent surgery, which involved replacing the affected valve after identifying a chronic infection via bronchoalveolar lavage (BAL).
- - The case highlights the importance of BAL cultures in diagnosing BCNE when traditional sputum tests are negative and underscores the need for ongoing antibiotic therapy post-surgery for successful recovery.
Impact of Malocclusions on Periodontopathogenic Bacterial Load and Progression of Periodontal Disease: A Quantitative Analysis.
Microorganisms
July 2024
Department of Orthodontics and Dentofacial Orthopaedics, Faculty of Dentistry, "Carol Davila" University of Medicine and Pharmacy, 37 Dionisie Lupu Street, 020021 Bucharest, Romania.
(1) Periodontal disease (PD) is a globally prevalent chronic inflammatory condition, exacerbated by the dysbiosis of the oral microbiota. This study aims to evaluate the bacterial load of specific periodontopathogenic bacteria in patients with malocclusions (MAL) compared to those without. (2) Methods: Conducted at the "Carol Davila" University of Medicine and Pharmacy, Bucharest, Romania, this pilot study involved two groups: patients with MAL and PD, and patients with PD but without MAL.
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