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World Journal of Clinical Cases Jun 2023-induced meningitis and -induced meningitis concomitant with spinal canal infection are extremely rare. To the best of our knowledge, only 1 case of -induced central...
BACKGROUND
-induced meningitis and -induced meningitis concomitant with spinal canal infection are extremely rare. To the best of our knowledge, only 1 case of -induced central system infection has been reported. This is the second report on meningitis combined with spinal canal infection due to .
CASE SUMMARY
We report a case of a 9-year-old boy suffering from meningitis and spinal canal infection. The patient presented to the neurosurgery department with lumbosacral pain for 1 mo and headache and vomiting for 1 d. He had been treated with cephalosporin and nonsteroidal anti-inflammatory drugs for fever, otalgia and pharyngalgia in a local hospital 2 mo prior to this admission. During hospitalization, magnetic resonance imaging suggested meningitis and L3-S1 lumbosacral dural sac infection. The cerebrospinal fluid and blood cultures were negative, but the cerebrospinal fluid specimen indicated the presence of by metagenomic next-generation sequencing. Previous cases of infection were retrieved from PubMed to characterize the clinicopathological features and identify the prognostic factors and related antimicrobial treatment of infection due to .
CONCLUSION
This report shed light on the characteristics of infection and highlighted the role of metagenomic next-generation sequencing in pathogen detection.
PubMed: 37383115
DOI: 10.12998/wjcc.v11.i16.3830 -
Anaerobe Dec 2022Prevotella are gram negative, obligate anaerobes and includes pigmented and non-pigmented species. They are typically regarded as commensals, especially of the...
Prevotella are gram negative, obligate anaerobes and includes pigmented and non-pigmented species. They are typically regarded as commensals, especially of the gastrointestinal tract and oral cavity, although opportunistic endogenous infections are known to be caused by a small number of strains. We report a case of a 51-year-old man with right-sided chest pain. Chest X-ray showed mild haziness in the right lung and he was diagnosed with right sided pleural effusion. Prevotella oris was isolated after pleural pus culture.
Topics: Male; Humans; Middle Aged; Pleural Effusion; Prevotella
PubMed: 36116686
DOI: 10.1016/j.anaerobe.2022.102644 -
BMC Infectious Diseases Sep 2023Brain abscesses caused by Prevotella oris are rarely reported. Here, we described a case of a brain infection caused by Prevotella oris that was detected by metagenomic... (Review)
Review
BACKGROUND
Brain abscesses caused by Prevotella oris are rarely reported. Here, we described a case of a brain infection caused by Prevotella oris that was detected by metagenomic next-generation sequencing (mNGS).
CASE PRESENTATION
A 63-year-old man with no medical history reported headache in the right frontotemporal region, fever, and intermittent diplopia. Magnetic resonance imaging (MRI) revealed abnormal signals and enhancement changes in the superior sellar region. mNGS testing showed that cerebrospinal fluid collected from the spine was positive for Prevotella oris. After receiving a combined treatment of antibiotic therapy, the patient recovered well.
CONCLUSION
We reviewed the relevant literature and summarized the characteristics and prognosis of this type of bacterial infection to provide ideas for clinicians to diagnose and treat this disease.
Topics: Male; Humans; Middle Aged; Brain Abscess; Prevotella; Brain; Combined Modality Therapy
PubMed: 37759232
DOI: 10.1186/s12879-023-08306-9 -
Anaerobe Aug 2022Prevotella species are Gram-negative anaerobic bacilli mainly involved in oral cavity infections. We report a rare case of bacteremia due to P. oris of probable hepatic...
Prevotella species are Gram-negative anaerobic bacilli mainly involved in oral cavity infections. We report a rare case of bacteremia due to P. oris of probable hepatic origin. A 70-year-old man with a history of diabetes mellitus was admitted for general malaise, fever and dyspnea. The patient was admitted to the ICU due to septic shock. Two sets of blood cultures yielded a pure culture of an anaerobic microorganism identified as P. oris by MALDI-TOF MS. The same microorganism was isolated from a hepatic abscess drainage. Only resistance to penicillin was documented. Treatment with piperacillin-tazobactam and levofloxacin was administered, and the patient was discharged following his recovery.
Topics: Aged; Bacteremia; Humans; Male; Prevotella; Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization
PubMed: 35598874
DOI: 10.1016/j.anaerobe.2022.102586 -
Revista Espanola de Quimioterapia :... Aug 2023
Topics: Humans; Prevotella; Lung Diseases; Bacteroidaceae Infections
PubMed: 37184104
DOI: 10.37201/req/001.2023 -
Microbiome Apr 2019Gastrointestinal mucosal injury (mucositis), commonly affecting the oral cavity, is a clinically significant yet incompletely understood complication of cancer... (Observational Study)
Observational Study
BACKGROUND
Gastrointestinal mucosal injury (mucositis), commonly affecting the oral cavity, is a clinically significant yet incompletely understood complication of cancer chemotherapy. Although antineoplastic cytotoxicity constitutes the primary injury trigger, the interaction of oral microbial commensals with mucosal tissues could modify the response. It is not clear, however, whether chemotherapy and its associated treatments affect oral microbial communities disrupting the homeostatic balance between resident microorganisms and the adjacent mucosa and if such alterations are associated with mucositis. To gain knowledge on the pathophysiology of oral mucositis, 49 subjects receiving 5-fluorouracil (5-FU) or doxorubicin-based chemotherapy were evaluated longitudinally during one cycle, assessing clinical outcomes, bacterial and fungal oral microbiome changes, and epithelial transcriptome responses. As a control for microbiome stability, 30 non-cancer subjects were longitudinally assessed. Through complementary in vitro assays, we also evaluated the antibacterial potential of 5-FU on oral microorganisms and the interaction of commensals with oral epithelial tissues.
RESULTS
Oral mucositis severity was associated with 5-FU, increased salivary flow, and higher oral granulocyte counts. The oral bacteriome was disrupted during chemotherapy and while antibiotic and acid inhibitor intake contributed to these changes, bacteriome disruptions were also correlated with antineoplastics and independently and strongly associated with oral mucositis severity. Mucositis-associated bacteriome shifts included depletion of common health-associated commensals from the genera Streptococcus, Actinomyces, Gemella, Granulicatella, and Veillonella and enrichment of Gram-negative bacteria such as Fusobacterium nucleatum and Prevotella oris. Shifts could not be explained by a direct antibacterial effect of 5-FU, but rather resembled the inflammation-associated dysbiotic shifts seen in other oral conditions. Epithelial transcriptional responses during chemotherapy included upregulation of genes involved in innate immunity and apoptosis. Using a multilayer epithelial construct, we show mucositis-associated dysbiotic shifts may contribute to aggravate mucosal damage since the mucositis-depleted Streptococcus salivarius was tolerated as a commensal, while the mucositis-enriched F. nucleatum displayed pro-inflammatory and pro-apoptotic capacity.
CONCLUSIONS
Altogether, our work reveals that chemotherapy-induced oral mucositis is associated with bacterial dysbiosis and demonstrates the potential for dysbiotic shifts to aggravate antineoplastic-induced epithelial injury. These findings suggest that control of oral bacterial dysbiosis could represent a novel preventive approach to ameliorate oral mucositis.
Topics: Antineoplastic Agents; Bacteria; Drug Therapy; Drug-Related Side Effects and Adverse Reactions; Dysbiosis; Fluorouracil; Fungi; Humans; Inflammation; Longitudinal Studies; Microbiota; Mouth; Mouth Mucosa; Prospective Studies; Stomatitis
PubMed: 31018870
DOI: 10.1186/s40168-019-0679-5 -
Journal of Microbiology, Immunology,... Jun 2014The coaggregation of bacteria has been defined as one of the most important processes in the oral infection such as periodontitis. Prevotella oris and Porphyromonas...
BACKGROUND/PURPOSE
The coaggregation of bacteria has been defined as one of the most important processes in the oral infection such as periodontitis. Prevotella oris and Porphyromonas gingivalis, which are two of the periodontopathogens, are frequently detected in severe forms of periodontal diseases. However, the interaction between P. oris and P. gingivalis is still unknown. In this study, the coaggregation of P. oris with nine oral bacterial species including P. gingivalis was examined.
METHODS
All bacteria used in this study were cultured anaerobically and suspended in coaggregation buffer. Each cell suspension was mixed in a test tube and subjected to shaking at room temperature for 1 hour. Subsequently, the coaggregation values were scored. Furthermore, the effects of various chemical reagents, and heat, proteinase K, and serum treatment were examined.
RESULTS
In this study, P. oris coaggregated only with P. gingivalis. A heat-stable, nonproteinous component of P. oris and a heat-labile, proteinous component of P. gingivalis play important roles in this coaggregation. In addition, this coaggregation was inhibited by l-arginine, l-lysine, and Nα-p-tosyl-l-lysine. Therefore, it was considered that a cell surface protein on P. gingivalis, such as gingipain, may be involved in the coaggregation. Furthermore, the coaggregation was not inhibited by serum treatment.
CONCLUSION
This is the first report to describe the coaggregation of P. oris and P. gingivalis. Our study proposes the possibility that P. oris may promote the colonization of P. gingivalis in an early stage of biofilm formation. Furthermore, this coaggregation may contribute to the initiation and progression of periodontitis.
Topics: Animals; Biofilms; Coculture Techniques; Endopeptidase K; Horses; Hot Temperature; Humans; Microbial Interactions; Periodontitis; Porphyromonas gingivalis; Prevotella; Serum
PubMed: 23245806
DOI: 10.1016/j.jmii.2012.09.005 -
International Journal of Systematic and... Apr 2007Gram-negative anaerobic rods were isolated from a human breast abscess. Based on genotypic and phenotypic characteristics, the novel strain belonged to the genus...
Gram-negative anaerobic rods were isolated from a human breast abscess. Based on genotypic and phenotypic characteristics, the novel strain belonged to the genus Prevotella. Phylogenetic analysis based on 16S rRNA gene sequence comparisons showed that it was closely related to Prevotella buccalis (94 % 16S rRNA gene sequence similarity), Prevotella salivae (90 %) and Prevotella oris (89.1 %). The major cellular fatty acid was C(14 : 0) (19.5 %). The new isolate represents a novel species in the genus Prevotella, for which the name Prevotella timonensis sp. nov. is proposed. The type strain is strain 4401737(T) (=CIP 108522(T)=CCUG 50105(T)).
Topics: Abscess; Adult; Bacteroidaceae Infections; Breast; DNA, Bacterial; DNA, Ribosomal; Female; Humans; Molecular Sequence Data; Phylogeny; Prevotella; RNA, Ribosomal, 16S
PubMed: 17392225
DOI: 10.1099/ijs.0.64609-0 -
Planta Medica Oct 1997The potential of intestinal bacteria to hydrolyze ginsenoside Rb1 to 20-O-beta-D-glucopyranosyl-20(S)-protopanaxadiol (I) was found in 79% of the fecal specimens from 58...
The potential of intestinal bacteria to hydrolyze ginsenoside Rb1 to 20-O-beta-D-glucopyranosyl-20(S)-protopanaxadiol (I) was found in 79% of the fecal specimens from 58 human subjects whose age ranged from 1 to 64 years. Following a ginsenoside-Rb1-hydrolyzing activity assay, Prevotella oris strains were then isolated as a major bacterial species possessing the potential. All the intestinal isolates converted ginsenosides Rb1 and Rd to I, ginsenoside Rb2 to 20-O-[alpha-L-arabinopyranosyl(1-->6)-beta-D-glucopyranosyl]-20(S) -protopanaxadiol (II), and ginsenoside Rc to 20-O-[alpha-L-arabinofuranosyl(1-->6)-beta-D-glucopyranosyl]-20(S)- protopanaxadiol (III) like fecal microflora, but did not attack ginsenosides Re or Rg1 (protopanaxatriol-type). The isolates were susceptible to colimycin (MIC, 3.13 micrograms/ml) and then the treatment of specific pathogen free mice with colimycin (20 mg/kg/day) decreased intestinal bacterial Rb1-hydrolyzing potential from 22.1 +/- 1.2% to 4.7 +/- 2.7%, while the decreased potential was restored to 30.7 +/- 3.7% by the inoculation with P. oris isolates. These results suggest that the metabolism of protopanaxadiol saponins to metabolites I-III in the intestines seems most partly due to intestinal P.oris. In addition, the fact that neither intact ginsenoside Rb1 nor its middle metabolic derivatives but only the final metabolite I was detected at 1.0-7.3 micrograms/ml in blood after oral administration of mice with ginsenoside Rb1 (125 mg/kg) allows us to speculate that metabolites I-III are the most likely forms of protopanaxadiol saponins absorbed from the intestines.
Topics: Adolescent; Adult; Animals; Child; Child, Preschool; Feces; Humans; Hydrolysis; Infant; Intestinal Mucosa; Mice; Microbial Sensitivity Tests; Middle Aged; Panax; Plants, Medicinal; Prevotella; Saponins
PubMed: 9342949
DOI: 10.1055/s-2006-957729 -
Research in Microbiology Dec 2005We report a bacterial isolate (Marseille isolate) recovered from the blood of a patient hospitalized in an intensive care unit, presenting with severe trauma, fever and...
We report a bacterial isolate (Marseille isolate) recovered from the blood of a patient hospitalized in an intensive care unit, presenting with severe trauma, fever and mechanical ventilation. Colonies appeared at 37 degrees C on blood agar after 72 h incubation. This isolate was a strictly anaerobic, Gram-negative rod phenotypically related to other Prevotella species described to date: non-motile, catalase-negative, oxidase-positive, non-glucose fermenting, resistant to vancomycin and susceptible to kanamycin. Cells exhibited a trilamellar membrane under electron microscopy. The fatty acid methyl ester profile was marginally related to that of Clostridium botulinum group A (distance: 26.27%) and Bifidobacterium bifidum GC subgroup B (distance: 26.38%). 16S rRNA gene sequence similarity was 90.0% with that of Prevotella oris and 89.1% with that of Prevotella melaninogenica. Partial rpoB gene sequence similarity was 84.5 and 86.4% with P. oris and P. melaninogenica, respectively. According to current standards, phenotypic traits, 16S rRNA and rpoB gene sequence analyses indicated that the Marseille isolate belonged to a previously unrecognized species of the genus Prevotella, and we propose classifying it in the new taxon "Prevotella massiliensis" sp. nov.
Topics: Adult; Bacteremia; Bacterial Proteins; Bacterial Typing Techniques; Bacteroidaceae Infections; Blood; Culture Media; DNA, Bacterial; DNA, Ribosomal; Genes, rRNA; Humans; Male; Molecular Sequence Data; Phenotype; Phylogeny; Prevotella; RNA, Ribosomal, 16S; Sequence Analysis, DNA
PubMed: 16085394
DOI: 10.1016/j.resmic.2005.05.008