Publications by authors named "Nicholas Armstrong"

The strains Marseille-Q7072 (= CSUR Q7072 = CECT 30604) and Marseille-Q7826 (= CSUR Q7826 = CECT 30727) were isolated from vaginal samples. As MALDI-TOF mass spectrometry failed to identify them, their genomes were directly sequenced to determine their taxogenomic identities. Both strains are anaerobic without any oxidase and catalase activity.

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Objective: To understand the determinants and benefits of cross-sector partnerships between Veterans Affairs Medical Centers (VAMCs) and geographically affiliated AmericaServes Network coordination centers that address Veteran health-related social needs.

Data Sources And Setting: Semi-structured interviews were conducted with AmericaServes and VAMC staff across seven regional networks. We matched administrative data to calculate the percentage of AmericaServes referrals that were successfully resolved (i.

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The composition of the vaginal microbiota is known to be influenced by various factors and to be associated with several disorders affecting women's health. Although metagenomics is currently a widely used method for studying the human microbiota, it has certain limitations, such as a lack of information on bacterial viability. It is therefore important to use culture-based methods such as culturomics.

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An isolate of a bacterium recovered from an endometrial biopsy failed to be identified by MALDI-TOF mass spectrometry and was subjected to 16S rRNA sequencing. The obtained sequence was compared by BLASTn against the NCBI database, which revealed that the most closely related species was Cellulomonas hominis and Cellulomonas pakistanensis, with 98.85% and 98.

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Background: Hepatitis B virus (HBV) infection is a global health epidemic that causes fatal complications, leading to liver cirrhosis and hepatocellular carcinoma. The link between HBV-related dysbiosis and specific bacterial taxa is still under investigation. is emerging as a new genus (formerly ), including , a gut pathogen previously associated with dysbiosis and human diseases such as autism, multiple sclerosis, and inflammatory bowel diseases.

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Objective: Because service professionals often lack cultural competence in working with veterans, veterans often perceive such professionals as "not understanding." The authors developed, evaluated, and implemented Veteran Cultural Competence Training (VCCT), combining educational and experiential components in an in-person training focused on building awareness, knowledge, and skills to better work with veterans.

Methods: Study 1 was a type 1 effectiveness-implementation hybrid trial examining VCCT effectiveness in a sample of social service professionals (N=41) compared with a matched comparison group (N=41) via the Multicultural Counseling Self-Efficacy Scale-Veteran Form (MCSE-V) instrument.

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β-lactamase enzymes have generated significant interest due to their ability to confer resistance to the most commonly used family of antibiotics in human medicine. Among these enzymes, the class B β-lactamases are members of a superfamily of metallo-β-lactamase (MβL) fold proteins which are characterised by conserved motifs (i.e.

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Introduction: is a study model for , a highly virulent pathogen, known to be the causative agent of melioidosis and a potential bioterrorism agent. These two bacteria use an (acyl-homoserine lactone) AHL-mediated quorum sensing (QS) system to regulate different behaviors including biofilm formation, secondary metabolite productions, and motility.

Methods: Using an enzyme-based quorum quenching (QQ) strategy, with the lactonase Pox having the best activity on AHLs, we evaluated the importance of QS in by combining proteomic and phenotypic analyses.

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Akkermansia muciniphila is a human intestinal tract bacterium that plays an important role in the mucus layer renewal. Several studies have demonstrated that it is a modulator for gut homeostasis and a probiotic for human health. The Akkermansia genus contains two species with standing in nomenclature but their genomic diversity remains unclear.

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Neurodegenerative disorders are a major public health issue. Despite decades of research efforts, we are still seeking an efficient cure for these pathologies. The initial paradigm of large aggregates of amyloid proteins (amyloid plaques, Lewis bodies) as the root cause of Alzheimer's and Parkinson's diseases has been mostly dismissed.

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Nonalcoholic steatohepatitis (NASH) increases with fructose consumption and metabolic syndrome and has been recently linked with endogenous ethanol production, notably by high alcohol-producing (HiAlc Kpn). yeasts are the main causes of auto-brewery syndromes but have been neglected in NASH. Here, the fecal ethanol and microbial content of 10 cases and 10 controls were compared.

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Background: Ventriculoperitoneal shunt (VPS) insertion and endoscopic third ventriculostomy (ETV) are common surgical procedures used to treat pediatric hydrocephalus. There have been numerous studies comparing ETV and VPS, but none from an African perspective. In this study, we sought to compare outcomes from African neurosurgical centers and review the associated complications.

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Two strains, designated as Marseille-P2918 and Marseille-P3646, were isolated from a 14-week-old Senegalese girl using culturomics: Urmitella timonensis strain Marseille-P2918 (= CSUR P2918, = DSM 103634) and Marasmitruncus massiliensis strain Marseille-P3646 (= CSUR P3646, = CCUG72353). Both strains were rod-shaped, anaerobic, spore forming motile bacteria. The 16S rRNA gene sequences of strains Marseille-P2918 (LT598554) and Marseille-P3646 (LT725660) shared 93.

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Using the culturomics approach, the previously unknown strain Marseille-P8953, was isolated and classified within the Weizmannia genus. Strain Marseille-P8953 was isolated from the faeces of a healthy subject and consisted of Gram-stain positive, spore-forming, motile rod-shaped cells. A 99.

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Strains Marseille-P3761 and Marseille-P3195 are representatives of two bacterial species isolated from human specimens. Strain Marseille-P3761 was isolated from the stool of a healthy volunteer, while strain Marseille-P3915 was cultivated from the urine of a kidney transplant recipient. Both strains are anaerobic Gram-positive coccoid bacteria.

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The increased exploitation of microbial sequencing methods has shed light on the high diversity of new microorganisms named Candidate Phyla Radiation (CPR). CPR are mainly detected via 16S rRNA/metabarcoding analyses or metagenomics and are found to be abundant in all environments and present in different human microbiomes. These microbes, characterized by their symbiotic/epiparasitic lifestyle with bacteria, are directly exposed to competition with other microorganisms sharing the same ecological niche.

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Two bacterial strains were isolated and identified using microbial culturomics and characterised according to the taxono-genomics strategy. The strictly anaerobic strain, Marseille-P3773, forms smooth and translucent colonies consisting of Gram-stain negative, non-motile and non-spore-forming rod-shaped cells. Strain Marseille-P3787 consists of Gram-stain positive, motile and spore-forming cells resulting in grey and translucent colonies.

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Strain Marseille-P9829 was isolated from a bone sample collected from an open right fibula fracture from a 46-years old patient. Strain Marseille-P9829 (= CSUR P9829 = DSM 110695) was a Gram-negative, non-spore-forming and non-motile bacterium. This strain had a positive catalase activity but was oxidase-negative.

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Strains Marseille-P2265 (=CSUR P2265 =DSM 102082) and Marseille-P3890 (=CSUR P3890 =CCUG 72341) were isolated from stool samples using the culturomics approach. The 16S rRNA gene sequences of both strains were sequenced and compared by BLASTn to the NCBI database. Strains Marseille-P2265 and Marseille-P3890 were most closely related to Acutalibacter muris with identities of 94.

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Taxono-genomics is an innovative concept coined for the description of new bacterial species. Phenotypic characteristics were combined with a genomic approach to describe two new species within the Clostridium senso stricto genus: Clostridium culturomicium strain CL-6 and Clostridium jeddahitimonense strain CL-2, both isolated from the gut microbiota of an obese man from Saudi Arabia. Strains CL-6 and CL-2 shared a similarity of 98.

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Five novel bacterial strains, Marseille-P1476 (=CSURP1476=DSM 100642), Marseille-P3256 (=CSURP3256=CECT 9977), Marseille-P2936 (=CSURP2936=DSM 103159), Marseille-P2912 (=CSURP2912=DSM 103345) and Marseille-P3197 (=CSURP3197=CCUG 71847), were isolated from various human specimens. These five strains were not identified at the species level by matrix-assisted laser desorption/ionization time of flight mass spectrometry. Following 16S rRNA gene sequence comparisons with the GenBank database, the highest nucleotide sequence similarities of all studied strains were obtained to members of the paraphyletic genus .

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Thienamycin, the first representative of carbapenem antibiotics was discovered in the mid-1970s from soil microorganism, Streptomyces cattleya, during the race to discover inhibitors of bacterial peptidoglycan synthesis. Chemically modified into imipenem (N-formimidoyl thienamycin), now one of the most clinically important antibiotics, thienamycin is encoded by a thienamycin gene cluster composed of 22 genes (thnA to thnV) from S. cattleya NRRL 8057 genome.

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