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Zhijun L, Wenhai Y, Peibin Z, Qingming L. Pediatric pulmonary infection caused by oral obligate anaerobes: Case Series. Front Pediatr 2023; 11:1226706. [PMID: 37744449 PMCID: PMC10513053 DOI: 10.3389/fped.2023.1226706] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 08/18/2023] [Indexed: 09/26/2023] Open
Abstract
Background Pneumonia is quite common in people with chronic bedridden, severe malnutrition and underlying diseases of cerebral palsy. Although poor oral hygiene and inadequate airway protection are risk factors, case reports of childhood pneumonia caused by oral obligate anaerobes are rare. Introduction We reported 4 cases of oral anaerobic pneumonia and empyema diagnosed by the pediatric intensive care unit (PICU) of our hospital. Discussion No bacteria were detected in sputum bacterial culture, pleural water bacterial culture and blood culture of the four children. Considering that multiple sputum cultures were negative, the pleural effusion and bronchoalveolar lavage fluid were subjected to next-generation sequencing (NGS) to identify the pathogen causing pneumonia. The results found oral obligate anaerobes represented by Parvimonas micra and Porphyromonas gingivalis. After identifying the pathogenic bacteria, we changed to piperacillin tazobactam combined with metronidazole for anti-infection treatment, and the pneumonia in the above patients was improved. In addition, all four patients had different basic medical histories, and long-term bed rest, severe malnutrition, poor oral hygiene and insufficient airway protection were all high risk factors for oral anaerobic pneumonia in these children. Conclusion Oral obligate anaerobes are one of the pathogens to consider for pneumonia in the elderly, but they may be easily overlooked in pediatric groups. Therefore, when receiving children with high-risk factors, we should be alert to the possibility of oral obligate anaerobic bacteria infection. Educating family members to pay attention to children's oral hygiene plays an important role in preventing oral obligatory anaerobic bacteria pneumonia. NGS can be used as a rapid diagnostic method when sputum culture cannot distinguish between pathogens.
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Affiliation(s)
| | | | | | - Luo Qingming
- Department of Pediatric Intensive Care Unit, Dongguan Children's Hospital Affiliated to Guangdong Medical University, Dongguan, China
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2
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Mosaddad SA, Mahootchi P, Safari S, Rahimi H, Aghili SS. Interactions between systemic diseases and oral microbiota shifts in the aging community: A narrative review. J Basic Microbiol 2023. [PMID: 37173818 DOI: 10.1002/jobm.202300141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2023] [Revised: 04/23/2023] [Accepted: 04/29/2023] [Indexed: 05/15/2023]
Abstract
As a gateway to general health and a diverse microbial habitat, the oral cavity is colonized by numerous microorganisms such as bacteria, fungi, viruses, and archaea. Oral microbiota plays an essential role in preserving oral health. Besides, the oral cavity also significantly contributes to systemic health. Physiological aging influences all body systems, including the oral microbial inhabitants. The cited effect can cause diseases by forming dysbiotic communities. Since it has been demonstrated that microbial dysbiosis could disturb the symbiosis state between the host and the resident microorganism, shifting the condition toward a more pathogenic one, this study investigated how the oral microbial shifts in aging could associate with the development or progression of systemic diseases in older adults. The current study focused on the interactions between variations in the oral microbiome and prevalent diseases in older adults, including diabetes mellitus, Sjögren's syndrome, rheumatoid arthritis, pulmonary diseases, cardiovascular diseases, oral candidiasis, Parkinson's disease, Alzheimer's disease, and glaucoma. Underlying diseases can dynamically modify the oral ecology and the composition of its resident oral microbiome. Clinical, experimental, and epidemiological research suggests the associations of systemic disorders with bacteremia and inflammation after oral microbial changes in older adults.
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Affiliation(s)
- Seyed Ali Mosaddad
- Student Research Committee, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Pegah Mahootchi
- Department of Oral and Maxillofacial Diseases, School of Dentistry, Ahvaz Jundishapur University of Medical Science, Ahvaz, Iran
| | - Sajedeh Safari
- Department of Prosthodontics, Islamic Azad University, Tehran, Iran
| | - Hussein Rahimi
- Student Research Committee, School of Dentistry, Bushehr University of Medical Sciences, Bushehr, Iran
| | - Seyedeh Sara Aghili
- Student Research Committee, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
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3
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Exploring the Mechanisms and Association between Oral Microflora and Systemic Diseases. Diagnostics (Basel) 2022; 12:diagnostics12112800. [PMID: 36428859 PMCID: PMC9689323 DOI: 10.3390/diagnostics12112800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 10/01/2022] [Accepted: 10/12/2022] [Indexed: 11/18/2022] Open
Abstract
The scope of dentistry is ever-changing and dynamic in all fields of dentistry including periodontal health and disease. Recent studies show that oral health and systemic health are interdependent, particularly in the way that poor oral hygiene and periodontal health affect the systemic health of an individual and vice versa. Periodontal diseases are multifactorial in nature in which the role of bacterial infections is inevitable. Furthermore, high-throughput sequencing technologies have shed light on the dysregulation of the growth of oral microbial flora and their environment, including those that are associated with periodontitis and other oral and non-oral diseases. Under such circumstances, it becomes important to explore oral microbiota and understand the effects of periodontal pathogens in the pathogenesis of systemic diseases. In addition, it may strengthen our view that a better understanding of oral microbial flora and proper examination of the oral cavity may aid in the early diagnosis and possible treatment of systemic diseases and conditions. This will eventually lead to providing better care to our patients. Therefore, in this research, we attempt to outline the periodontal pathophysiology along with the role of periodontal pathogens in some commonly encountered systemic conditions.
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Bhuyan R, Bhuyan SK, Mohanty JN, Das S, Juliana N, Abu IF. Periodontitis and Its Inflammatory Changes Linked to Various Systemic Diseases: A Review of Its Underlying Mechanisms. Biomedicines 2022; 10:biomedicines10102659. [PMID: 36289921 PMCID: PMC9599402 DOI: 10.3390/biomedicines10102659] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 09/29/2022] [Accepted: 10/04/2022] [Indexed: 11/20/2022] Open
Abstract
Periodontitis is a chronic inflammatory disease of the gums. The incidence of periodontitis is increasing all over the world. In patients with periodontitis, there is gradual destruction of the periodontal ligament and the alveolar bone, and later, in advanced stages, there is tooth loss. Different microorganisms, the host’s immune response, and various environmental factors interact in the progression of this chronic inflammatory disease. In the present review, we discuss the epidemiology, clinical features, diagnosis, and complications of periodontitis. We also discuss the association of chronic inflammation found in periodontitis with various other systemic diseases, which include cardiovascular, respiratory, diabetes, Alzheimer’s, cancer, adverse pregnancy, and multiple myeloma, and also highlight microbial carcinogenesis and the microRNAs involved. The latest updates on the molecular mechanism, possible biomarkers, and treatment procedures may be beneficial for diagnostic and therapeutic purposes.
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Affiliation(s)
- Ruchi Bhuyan
- Department of Oral Pathology & Microbiology, IMS and SUM Hospital, Siksha ‘O’ Anusandhan University (Deemed to be), Bhubaneswar 751003, India
- Department of Medical Research, IMS and SUM Hospital, Siksha ‘O’ Anusandhan University (Deemed to be), Bhubaneswar 751003, India
| | - Sanat Kumar Bhuyan
- Institute of Dental Sciences, Siksha ‘O’ Anusandhan University (Deemed to be), Bhubaneswar 751003, India
| | - Jatindra Nath Mohanty
- Department of Medical Research, IMS and SUM Hospital, Siksha ‘O’ Anusandhan University (Deemed to be), Bhubaneswar 751003, India
| | - Srijit Das
- School of Applied Sciences, Centurion University of Technology and Management, Jatni, Bhubaneswar 752050, India
- Correspondence:
| | - Norsham Juliana
- Department of Human and Clinical Anatomy, College of Medicine & Health Sciences, Sultan Qaboos University, Muscat 123, Oman
| | - Izuddin Fahmy Abu
- Faculty of Medicine and Health Sciences, Universiti Sains Islam Malaysia, Nilai 71800, Malaysia
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5
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Koga A, Ariyoshi W, Kobayashi K, Izumi M, Isobe A, Akifusa S, Nishihara T. The Association between Tannerella forsythia and the Onset of Fever in Older Nursing Home Residents: A Prospective Cohort Study. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19084734. [PMID: 35457601 PMCID: PMC9025807 DOI: 10.3390/ijerph19084734] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 04/01/2022] [Accepted: 04/12/2022] [Indexed: 11/16/2022]
Abstract
Background: Periodontal pathogens are related to the incidence of systemic diseases. This study aimed to examine whether periodontal pathogen burden is associated with the risk of fever onset in older adults. Methods: Older adults in nursing homes, aged ≥65 years, were enrolled. The study was set in Kitakyushu, Japan. The body temperatures of participants were ≥37.2 °C and were recorded for eight months. As periodontal pathogens, Porphyromonas gingivalis, Treponema denticola, and Tannerella forsythia were qualified by a real-time polymerase chain reaction at the baseline. For statistical analysis, the number of bacterial counts was logarithmically conversed to 10 as a base. Results: Data from 56 participants with a median age of 88 (62−98) years were available for analysis. The logarithmic-conversed bacterial counts of T. forsythia, but not P. gingivalis or T. denticola, were associated with the onset of fever in older residents. The Kaplan−Meier method revealed that the group with <104 of T. forsythia had significantly less cumulative fever incidence than the group with ≥104 of T. forsythia. The group with ≥104 of T. forsythia was associated with an increased risk of fever onset (hazard ratio, 3.7; 98% confidence interval, 1.3−10.2; p = 0.012), which was adjusted for possible confounders. Conclusions: Bacterial burden of T. forsythia in the oral cavity was associated with the risk of the onset of fever in older nursing homes residents.
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Affiliation(s)
- Ayaka Koga
- Division of Infections and Molecular Biology, Faculty of Dentistry, Kyushu Dental University, Fukuoka 803-8580, Japan; (A.K.); (W.A.); (K.K.); (T.N.)
- School of Oral Health Sciences, Faculty of Dentistry, Kyushu Dental University, Fukuoka 803-8580, Japan; (M.I.); (A.I.)
| | - Wataru Ariyoshi
- Division of Infections and Molecular Biology, Faculty of Dentistry, Kyushu Dental University, Fukuoka 803-8580, Japan; (A.K.); (W.A.); (K.K.); (T.N.)
| | - Kaoru Kobayashi
- Division of Infections and Molecular Biology, Faculty of Dentistry, Kyushu Dental University, Fukuoka 803-8580, Japan; (A.K.); (W.A.); (K.K.); (T.N.)
- School of Oral Health Sciences, Faculty of Dentistry, Kyushu Dental University, Fukuoka 803-8580, Japan; (M.I.); (A.I.)
- ADTEC Co., Oita 879-0453, Japan
| | - Maya Izumi
- School of Oral Health Sciences, Faculty of Dentistry, Kyushu Dental University, Fukuoka 803-8580, Japan; (M.I.); (A.I.)
| | - Ayaka Isobe
- School of Oral Health Sciences, Faculty of Dentistry, Kyushu Dental University, Fukuoka 803-8580, Japan; (M.I.); (A.I.)
| | - Sumio Akifusa
- School of Oral Health Sciences, Faculty of Dentistry, Kyushu Dental University, Fukuoka 803-8580, Japan; (M.I.); (A.I.)
- Correspondence: ; Tel.: +81-93-285-3107
| | - Tatsuji Nishihara
- Division of Infections and Molecular Biology, Faculty of Dentistry, Kyushu Dental University, Fukuoka 803-8580, Japan; (A.K.); (W.A.); (K.K.); (T.N.)
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6
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Canela HMS, Cardoso B, Frazão MR, Falcão JP, Vitali LH, Martinez R, da Silva Ferreira ME. Genetic diversity assessed using PFGE, MLP and MLST in Candida spp. candidemia isolates obtained from a Brazilian hospital. Braz J Microbiol 2021; 52:503-516. [PMID: 33611738 PMCID: PMC8105495 DOI: 10.1007/s42770-021-00446-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 02/02/2021] [Indexed: 01/12/2023] Open
Abstract
Candida spp. are the main causative agents of invasive fungal infections in immunocompromised patients. Candidemia has attributable mortality rates of 15 to 35% and increases hospitalisation time and costs, thus making this disease a public health concern. This study aimed to use pulsed-field gel electrophoresis (PFGE), microsatellite length polymorphism (MLP) and multilocus sequence typing (MLST) to analyse the genetic relationships among 65 Candida spp. bloodstream isolates, including 35 Candida albicans, 15 Candida glabrata and 15 Candida tropicalis isolates, all of which were obtained from patients in a Brazilian hospital. Moreover, patient clinical data were assessed. All techniques resulted in high discriminatory indexes. C. albicans and C. tropicalis isolates showed high genetic variability, while C. glabrata isolates had relatively low genetic variability. Moreover, a cluster of C. glabrata isolates was identified in a hospital unit. New MLST sequence types, diploid sequence types and alleles are described. Relationships were not observed between the molecular typing results and clinical characteristics. The molecular typing of clinical strains increases our understanding of candidemia epidemiology and promotes the development of strategies that can reduce the incidence of this disease. Moreover, this study is the first to combine these techniques to genotype these three species in Brazil.
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Affiliation(s)
- Heliara Maria Spina Canela
- Departamento de Ciências Farmacêuticas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Bloco S - Térreo - Sala 013A-S, Avenida do Café S/N, CEP 14040-903, Ribeirão Preto, São Paulo, Brazil
| | - Bárbara Cardoso
- Departamento de Ciências Farmacêuticas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Bloco S - Térreo - Sala 013A-S, Avenida do Café S/N, CEP 14040-903, Ribeirão Preto, São Paulo, Brazil
| | - Miliane Rodrigues Frazão
- Departamento de Ciências Farmacêuticas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Bloco S - Térreo - Sala 013A-S, Avenida do Café S/N, CEP 14040-903, Ribeirão Preto, São Paulo, Brazil
| | - Juliana Pfrimer Falcão
- Departamento de Ciências Farmacêuticas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Bloco S - Térreo - Sala 013A-S, Avenida do Café S/N, CEP 14040-903, Ribeirão Preto, São Paulo, Brazil
| | - Lucia Helena Vitali
- Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Roberto Martinez
- Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Márcia Eliana da Silva Ferreira
- Departamento de Ciências Farmacêuticas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Bloco S - Térreo - Sala 013A-S, Avenida do Café S/N, CEP 14040-903, Ribeirão Preto, São Paulo, Brazil.
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7
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Antimicrobials from Medicinal Plants: An Emergent Strategy to Control Oral Biofilms. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11094020] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Oral microbial biofilms, directly related to oral diseases, particularly caries and periodontitis, exhibit virulence factors that include acidification of the oral microenvironment and the formation of biofilm enriched with exopolysaccharides, characteristics and common mechanisms that, ultimately, justify the increase in antibiotics resistance. In this line, the search for natural products, mainly obtained through plants, and derived compounds with bioactive potential, endorse unique biological properties in the prevention of colonization, adhesion, and growth of oral bacteria. The present review aims to provide a critical and comprehensive view of the in vitro antibiofilm activity of various medicinal plants, revealing numerous species with antimicrobial properties, among which, twenty-four with biofilm inhibition/reduction percentages greater than 95%. In particular, the essential oils of Cymbopogon citratus (DC.) Stapf and Lippia alba (Mill.) seem to be the most promising in fighting microbial biofilm in Streptococcus mutans, given their high capacity to reduce biofilm at low concentrations.
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8
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Kumar PS, Subramanian K. Demystifying the mist: Sources of microbial bioload in dental aerosols. J Periodontol 2020; 91:1113-1122. [PMID: 32662070 PMCID: PMC7405170 DOI: 10.1002/jper.20-0395] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 06/22/2020] [Accepted: 06/23/2020] [Indexed: 12/12/2022]
Abstract
The risk of transmitting airborne pathogens is an important consideration in dentistry and has acquired special significance in the context of recent respiratory disease epidemics. The purpose of this review, therefore, is to examine (1) what is currently known regarding the physics of aerosol creation, (2) the types of environmental contaminants generated by dental procedures, (3) the nature, quantity, and sources of microbiota in these contaminants and (4) the risk of disease transmission from patients to dental healthcare workers. Most dental procedures that use ultrasonics, handpieces, air‐water syringes, and lasers generate sprays, a fraction of which are aerosolized. The vast heterogeneity in the types of airborne samples collected (spatter, settled aerosol, or harvested air), the presence and type of at‐source aerosol reduction methods (high‐volume evacuators, low volume suction, or none), the methods of microbial sampling (petri dishes with solid media, filter paper discs, air harvesters, and liquid transport media) and assessment of microbial bioload (growth conditions, time of growth, specificity of microbial characterization) are barriers to drawing robust conclusions. For example, although several studies have reported the presence of microorganisms in aerosols generated by ultrasonic scalers and high‐speed turbines, the specific types of organisms or their source is not as well studied. This paucity of data does not allow for definitive conclusions to be drawn regarding saliva as a major source of airborne microorganisms during aerosol generating dental procedures. Well‐controlled, large‐scale, multi center studies using atraumatic air harvesters, open‐ended methods for microbial characterization and integrated data modeling are urgently needed to characterize the microbial constituents of aerosols created during dental procedures and to estimate time and extent of spread of these infectious agents.
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Affiliation(s)
- Purnima S Kumar
- Division of Periodontology, College of Dentistry, The Ohio State University, Columbus, OH
| | - Kumar Subramanian
- Division of Pediatric Dentistry, College of Dentistry, The Ohio State University, Columbus, OH
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9
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杜 芹, 马 歆. [Research progress of correlation between periodontal pathogens and systemic diseases]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2020; 40:759-764. [PMID: 32897213 PMCID: PMC7277321 DOI: 10.12122/j.issn.1673-4254.2020.05.24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Indexed: 11/24/2022]
Abstract
Periodontal pathogens are the main pathogenic factor of periodontitis. Periodontal pathogens have a large variety of virulence factors such as lipopolysaccharide, fimbriae and proteases, which enables the pathogens to infect periodontal tissues and stimulate the secretion of inflammatory cytokines, causing chronic systemic inflammation. Periodontal pathogens may invade multiple systems such as the circulatory system, immune system, respiratory system and digestive system to cause systematic diseases. Recent studies have shown that periodontal pathogens may have close relations with systemic diseases such as cardiovascular disease, diabetes, rheumatoid arthritis, and cancer. Among the periodontal pathogens, Porphyromonas gingivalis can be found in atherosclerotic plaques to impairing the function of the vascular endothelium; Porphyromonas gingivalis may also increase the level of inflammatory factors such as TNF-α to promote insulin resistance and diabetes. Many of the periodontal pathogens such as Porphyromonas gingivalis, Tannerella forsythia and Prevotella intermedia can be detected in the synovial fluid of rheumatoid arthritis patients, suggesting their involvement in the pathogenesis of rheumatoid arthritis. Fusobacterium nucleatum may cause alterations in the intestinal microbiome in mice and promote the occurrence of intestinal tumors. Herein we review the recent progresses in the relationship between periodontal pathogens and systemic diseases.
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Affiliation(s)
- 芹 杜
- 四川省医学科学院//四川省人民医院口腔科,四川 成都 610072Department of Stomatlogy, Sichuan Academy of Medical Science & Sichuan People's Hospital, Chengdu 610072, China
- 电子科技大学附属医学院,四川 成都 610054School of Medicine, University of Electronic Science and Technology, Chengdu 610054, China
- 中国科学院成都生物研究所,四川 成都 610041Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
| | - 歆茹 马
- 四川省医学科学院//四川省人民医院口腔科,四川 成都 610072Department of Stomatlogy, Sichuan Academy of Medical Science & Sichuan People's Hospital, Chengdu 610072, China
- 遵义医科大学口腔医学院,贵州 遵义 563000School of Stomatology, Zunyi Medicial University, Zunyi 563000, China
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10
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Association between periodontal pathogens and systemic disease. Biomed J 2019; 42:27-35. [PMID: 30987702 PMCID: PMC6468093 DOI: 10.1016/j.bj.2018.12.001] [Citation(s) in RCA: 329] [Impact Index Per Article: 65.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2018] [Revised: 11/22/2018] [Accepted: 12/04/2018] [Indexed: 12/13/2022] Open
Abstract
A growing body of literature suggests that there is a link between periodontitis and systemic diseases. These diseases include cardiovascular disease, gastrointestinal and colorectal cancer, diabetes and insulin resistance, and Alzheimer's disease, as well as respiratory tract infection and adverse pregnancy outcomes. The presence of periodontal pathogens and their metabolic by-products in the mouth may in fact modulate the immune response beyond the oral cavity, thus promoting the development of systemic conditions. A cause-and-effect relationship has not been established yet for most of the diseases, and the mediators of the association are still being identified. A better understanding of the systemic effects of oral microorganisms will contribute to the goal of using the oral cavity to diagnose and possibly treat non-oral systemic disease.
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Mattevi GS, Ferreira de Mello ALS, Scannapieco FA, Carcereri DL. The Dentist's Role in Southern Brazilian Teaching Hospitals: A Grounded Theory Study. J Dent Educ 2018; 82:636-643. [PMID: 29858262 DOI: 10.21815/jde.018.073] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Accepted: 11/04/2017] [Indexed: 11/20/2022]
Abstract
The aim of this study was to develop a theoretical model to describe the role that the dentist plays in Brazilian hospital settings. This qualitative study was based on the grounded theory research method. Participants were a total of 27 individuals in three groups: dentists and general practice and oral and maxillofacial surgery residents; faculty; and other health professionals who interacted with dental patients in the hospital setting during the 2012-13 year. Data were collected in three teaching hospitals in the state of Santa Catarina, Brazil, through scripted interviews using open-ended questions. The stages of collection, codification, ordination, and integration of data were guided by constant comparative techniques to formulate a theoretical model. The codes generated were organized into seven categories: identifying the hospital as a working and teaching environment; recalling the dentists' professional pathways; reflecting on the dentist's work in the hospital; considering the political and organizational dimension of the role of the dentist in the hospital; understanding patients' life and health contexts; education and professional practice; and moving on towards interdisciplinary practices in the hospital setting. Integrating the categories led to a theoretical model called "The Dentist's Role in the Hospital Setting: An Interdisciplinary Construction." This theoretical model provides a framework to understand how dentists perform in the hospital setting, with a focus on interdisciplinary practice, which in this study was shown to be incipient and heterogeneous.
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Affiliation(s)
- Gianina Salton Mattevi
- Gianina Salton Mattevi is a PhD student, Postgraduate Program in Dentistry, Federal University of Santa Catarina, Florianopolis, Brazil; Ana Lúcia Schaefer Ferreira de Mello is Professor, Department of Dentistry and Postgraduate Program in Dentistry, Federal University of Santa Catarina, Florianopolis, Brazil; Frank Andrew Scannapieco is Professor and Chair, Department of Oral Biology and Associate Dean for Faculty and Professional Development, School of Dental Medicine, University at Buffalo; and Daniela Lemos Carcereri is Dean, Dental School and Professor, Postgraduate Program in Dentistry, Federal University of Santa Catarina, Florianopolis, Brazil.
| | - Ana Lúcia Schaefer Ferreira de Mello
- Gianina Salton Mattevi is a PhD student, Postgraduate Program in Dentistry, Federal University of Santa Catarina, Florianopolis, Brazil; Ana Lúcia Schaefer Ferreira de Mello is Professor, Department of Dentistry and Postgraduate Program in Dentistry, Federal University of Santa Catarina, Florianopolis, Brazil; Frank Andrew Scannapieco is Professor and Chair, Department of Oral Biology and Associate Dean for Faculty and Professional Development, School of Dental Medicine, University at Buffalo; and Daniela Lemos Carcereri is Dean, Dental School and Professor, Postgraduate Program in Dentistry, Federal University of Santa Catarina, Florianopolis, Brazil
| | - Frank Andrew Scannapieco
- Gianina Salton Mattevi is a PhD student, Postgraduate Program in Dentistry, Federal University of Santa Catarina, Florianopolis, Brazil; Ana Lúcia Schaefer Ferreira de Mello is Professor, Department of Dentistry and Postgraduate Program in Dentistry, Federal University of Santa Catarina, Florianopolis, Brazil; Frank Andrew Scannapieco is Professor and Chair, Department of Oral Biology and Associate Dean for Faculty and Professional Development, School of Dental Medicine, University at Buffalo; and Daniela Lemos Carcereri is Dean, Dental School and Professor, Postgraduate Program in Dentistry, Federal University of Santa Catarina, Florianopolis, Brazil
| | - Daniela Lemos Carcereri
- Gianina Salton Mattevi is a PhD student, Postgraduate Program in Dentistry, Federal University of Santa Catarina, Florianopolis, Brazil; Ana Lúcia Schaefer Ferreira de Mello is Professor, Department of Dentistry and Postgraduate Program in Dentistry, Federal University of Santa Catarina, Florianopolis, Brazil; Frank Andrew Scannapieco is Professor and Chair, Department of Oral Biology and Associate Dean for Faculty and Professional Development, School of Dental Medicine, University at Buffalo; and Daniela Lemos Carcereri is Dean, Dental School and Professor, Postgraduate Program in Dentistry, Federal University of Santa Catarina, Florianopolis, Brazil
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12
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Vieira JN, Feijó AM, Bueno ME, Gonçalves CL, Lund RG, Mendes JF, Villarreal JPV, Villela MM, Nascente PS. Evaluation of the frequency of Candida spp. in hospitalized and non-hospitalized subjects. BRAZ J BIOL 2018; 78:644-652. [PMID: 29451605 DOI: 10.1590/1519-6984.169623] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Accepted: 05/27/2017] [Indexed: 11/21/2022] Open
Abstract
The aim of this study was to evaluate the frequency of Candida species between a non-hospitalized and a hospitalized population. For this purpose, samples of saliva were sampled through sterile swabs, moistened in peptone water and rubbed in the oral cavity of 140 individuals, from which, 70 were hospitalized patients from the Medical Clinic of a Teaching Hospital and the other 70 were non-hospitalized subjects. All saliva samples were plated in Sabouraud Dextrose agar added with Chloramphenicol and incubated at 36 °C for 48 hours. The morphology identification was performed through macroscopic and microscopic characterization, the CHROMagar Candida medium and the VITEK® system Yeast Biochemical Card (bio Mérieux SA, France). The results showed a colonization of Candida spp. in 85.7% the hospitalized individuals, where the species found were C. albicans (60%), C. tropicalis (23.4%), C. krusei (3.3%) and Candida spp. (13.3%). In the non-hospitalized individuals the colonization by Candida spp was 47.1%, and the species found were: C. albicans (45.5%), C.krusei (9.1%), C. guilliermondii (9.1% %), C. tropicalis (3.0%), C. famata (3.0%) and Candida spp. (30.3%). In spite of their presence in oral cavity in both groups, Candida spp. was more frequently isolated in hospitalized individuals, who were 6.73 times more likely to have this fungus in the oral cavity and were 3.88 times more likely to have Candida albicans.
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Affiliation(s)
- J N Vieira
- Laboratório de Parasitologia, Instituto de Biologia, Departamento de Microbiologia e Parasitologia, Universidade Federal de Pelotas - UFPEL, Campus universitário Capão do Leão, s/n, Prédio 18, Sala 3, CEP 96010-900, Pelotas, RS, Brazil
| | - A M Feijó
- Laboratório de Parasitologia, Instituto de Biologia, Departamento de Microbiologia e Parasitologia, Universidade Federal de Pelotas - UFPEL, Campus universitário Capão do Leão, s/n, Prédio 18, Sala 3, CEP 96010-900, Pelotas, RS, Brazil
| | - M E Bueno
- Laboratório de Parasitologia, Instituto de Biologia, Departamento de Microbiologia e Parasitologia, Universidade Federal de Pelotas - UFPEL, Campus universitário Capão do Leão, s/n, Prédio 18, Sala 3, CEP 96010-900, Pelotas, RS, Brazil
| | - C L Gonçalves
- Laboratório de Parasitologia, Instituto de Biologia, Departamento de Microbiologia e Parasitologia, Universidade Federal de Pelotas - UFPEL, Campus universitário Capão do Leão, s/n, Prédio 18, Sala 3, CEP 96010-900, Pelotas, RS, Brazil
| | - R G Lund
- Departamento de Odontologia Restauradora, Faculdade de Medicina Dentária, Universidade Federal de Pelotas - UFPEL, Rua Gonçalves Chaves, nº 457, Centro, CEP 96020-080, Pelotas, RS, Brazil
| | - J F Mendes
- Laboratório de Parasitologia, Instituto de Biologia, Departamento de Microbiologia e Parasitologia, Universidade Federal de Pelotas - UFPEL, Campus universitário Capão do Leão, s/n, Prédio 18, Sala 3, CEP 96010-900, Pelotas, RS, Brazil
| | - J P V Villarreal
- Laboratório de Parasitologia, Instituto de Biologia, Departamento de Microbiologia e Parasitologia, Universidade Federal de Pelotas - UFPEL, Campus universitário Capão do Leão, s/n, Prédio 18, Sala 3, CEP 96010-900, Pelotas, RS, Brazil
| | - M M Villela
- Laboratório de Parasitologia, Instituto de Biologia, Departamento de Microbiologia e Parasitologia, Universidade Federal de Pelotas - UFPEL, Campus universitário Capão do Leão, s/n, Prédio 18, Sala 3, CEP 96010-900, Pelotas, RS, Brazil
| | - P S Nascente
- Laboratório de Parasitologia, Instituto de Biologia, Departamento de Microbiologia e Parasitologia, Universidade Federal de Pelotas - UFPEL, Campus universitário Capão do Leão, s/n, Prédio 18, Sala 3, CEP 96010-900, Pelotas, RS, Brazil
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Evaluation of Genetic Diversity of Candida spp. and Klebsiella spp. Isolated from the Denture Plaque of COPD Patients. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 955:1-8. [PMID: 27573645 DOI: 10.1007/5584_2016_68] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Yeast-like fungi and gram-negative bacilli are the most frequent potential pathogens of the respiratory tract isolated from the denture plaque of patients with chronic obstructive pulmonary disease (COPD). Dominant species among yeast-like fungi are Candida albicans and Candida tropicalis. Significant frequency is also exhibited by Klebsiella pneumoniae and Klebsiella oxytoca. The purpose of this study was to analyze genetic diversity of the strains of C. albicans, C. tropicalis, and Klebsiella spp. present in patients in stable phases of COPD. The analysis was conducted by the random amplified polymorphic DNA (RAPD) method on clinical strains isolated from patients with COPD and control patients in overall good health. Forty one strains of Candida albicans, 12 of Candida tropicalis, as well as 9 strains of K. pneumoniae and 7 of K. oxytoca were scrutinized. The dominant species in clinical material from COPD patients was Candida albicans with a substantial degree of variations of genetic profiles. On the basis of affinity analysis, 19 genetic types were identified within this strain. An analysis of the banding patterns among C. tropicalis strains indicated the existence of 6 genetic types. A considerable diversity of genetic profiles among Klebsiella spp. also was established. The genotype diversity of Klebsiella spp. strains may indicate the endogenic character of the majority of infections, regardless of the therapy applied for the underlying condition.
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Methods of Candida dubliniensis identification and its occurrence in human clinical material. Folia Microbiol (Praha) 2017; 62:401-408. [DOI: 10.1007/s12223-017-0510-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Accepted: 02/21/2017] [Indexed: 01/30/2023]
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Xiao J, Moon Y, Li L, Rustchenko E, Wakabayashi H, Zhao X, Feng C, Gill SR, McLaren S, Malmstrom H, Ren Y, Quivey R, Koo H, Kopycka-Kedzierawski DT. Candida albicans Carriage in Children with Severe Early Childhood Caries (S-ECC) and Maternal Relatedness. PLoS One 2016; 11:e0164242. [PMID: 27741258 PMCID: PMC5065202 DOI: 10.1371/journal.pone.0164242] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Accepted: 08/26/2016] [Indexed: 11/23/2022] Open
Abstract
Introduction Candida albicans has been detected together with Streptococcus mutans in high numbers in plaque-biofilm from children with early childhood caries (ECC). The goal of this study was to examine the C. albicans carriage in children with severe early childhood caries (S-ECC) and the maternal relatedness. Methods Subjects in this pilot cross-sectional study were recruited based on a convenient sample. DMFT(S)/dmft(s) caries and plaque scores were assessed during a comprehensive oral exam. Social-demographic and related background information was collected through a questionnaire. Saliva and plaque sample from all children and mother subjects were collected. C. albicans were isolated by BBL™ CHROMagar™ and also identified using germ tube test. S. mutans was isolated using Mitis Salivarius with Bacitracin selective medium and identified by colony morphology. Genetic relatedness was examined using restriction endonuclease analysis of the C. albicans genome using BssHII (REAG-B). Multilocus sequence typing was used to examine the clustering information of isolated C. albicans. Spot assay was performed to examine the C. albicans Caspofungin susceptibility between S-ECC children and their mothers. All statistical analyses (power analysis for sample size, Spearman’s correlation coefficient and multiple regression analyses) were implemented with SAS 9.4 Results A total of 18 S-ECC child-mother pairs and 17 caries free child-mother pairs were enrolled in the study. Results indicated high C. albicans carriage rate in the oral cavity (saliva and plaque) of both S-ECC children and their mothers (>80%). Spearman’s correlation coefficient also indicated a significant correlation between salivary and plaque C. albicans and S. mutans carriage (p<0.01) and caries severity (p<0.05). The levels of C. albicans in the prepared saliva and plaque sample (1ml resuspension) of S-ECC children were 1.3 ± 4.5 x104 cfu/ml and 1.2 ± 3.5 x104 cfu/ml (~3-log higher vs. caries-free children). Among 18 child-mother pairs, >60% of them demonstrated identical C. albicans REAG-B pattern. C. albicans isolated from >65% of child-mother pairs demonstrated similar susceptibility to caspofungin in spot assay, while no caspofungin resistant strains were seen when compared with C. albicans wild-type strain SC5314. Interestingly, the regression analysis showed that factors such as antibiotic usage, birth weight, inhaler use, brushing frequency, and daycare attendance had no significant effect on the oral carriage of C. albicans in the S-ECC children. Conclusions Our results reveal that both the child with S-ECC and the mother were highly infected with C. albicans, while most of the strains were genetically related, suggesting that the mother might be a source for C. albicans acquisition in the oral cavity of children affected by the disease.
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Affiliation(s)
- Jin Xiao
- Eastman Institute for Oral Health, University of Rochester Medical Center, Rochester, NY, United States of America
- * E-mail:
| | - Yonghwi Moon
- Eastman Institute for Oral Health, University of Rochester Medical Center, Rochester, NY, United States of America
| | - Lihua Li
- Department of Dentistry, North Sichuan Medical University, Sichuan, China
| | - Elena Rustchenko
- Department of Biochemistry and Biophysics, University of Rochester Medical Center, Rochester, NY, United States of America
| | - Hironao Wakabayashi
- Department of Biochemistry and Biophysics, University of Rochester Medical Center, Rochester, NY, United States of America
| | - Xiaoyi Zhao
- School of Dentistry, Peking University, Beijing, China
| | - Changyong Feng
- Department of Biostatistics and Computational Biology, University of Rochester Medical Center, Rochester, NY, United States of America
| | - Steven R. Gill
- Genomics Research Center, University of Rochester Medical Center, Rochester, NY, United States of America
| | - Sean McLaren
- Eastman Institute for Oral Health, University of Rochester Medical Center, Rochester, NY, United States of America
| | - Hans Malmstrom
- Eastman Institute for Oral Health, University of Rochester Medical Center, Rochester, NY, United States of America
| | - Yanfang Ren
- Eastman Institute for Oral Health, University of Rochester Medical Center, Rochester, NY, United States of America
| | - Robert Quivey
- Eastman Institute for Oral Health, University of Rochester Medical Center, Rochester, NY, United States of America
| | - Hyun Koo
- Department of Orthodontics and Pediatric Dentistry & Community Oral Health Divisions, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, United States of America
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Xu H, Jenkinson HF, Dongari-Bagtzoglou A. Innocent until proven guilty: mechanisms and roles of Streptococcus-Candida interactions in oral health and disease. Mol Oral Microbiol 2015; 29:99-116. [PMID: 24877244 PMCID: PMC4238848 DOI: 10.1111/omi.12049] [Citation(s) in RCA: 88] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Candida albicans and streptococci of the mitis group colonize the oral cavities of the majority of healthy humans. While C. albicans is considered an opportunistic pathogen, streptococci of this group are broadly considered avirulent or even beneficial organisms. However, recent evidence suggests that multi-species biofilms with these organisms may play detrimental roles in host homeostasis and may promote infection. In this review we summarize the literature on molecular interactions between members of this streptococcal group and C. albicans, with emphasis on their potential role in the pathogenesis of opportunistic oral mucosal infections.
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Troiano F, Polo A, Villa F, Cappitelli F. Assessing the microbiological risk to stored sixteenth century parchment manuscripts: a holistic approach based on molecular and environmental studies. BIOFOULING 2014; 30:299-311. [PMID: 24552245 DOI: 10.1080/08927014.2013.871539] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The microbial risk for the conservation of seven sixteenth century parchment manuscripts, which showed brown discolouration putatively caused by microorganisms, was evaluated using non-invasive sampling techniques, microscopy, studies of surface-associated and airborne microflora with culture-independent molecular methods, and by measuring repository thermo-hygrometric values. Microscopic observations and ATP assays demonstrated a low level of contamination, indicating that the discolouration was not related to currently active microbial colonisation. Nevertheless, a culture-independent molecular approach was adopted to fully characterise surface-associated communities searching for biodeteriogens that could grow under appropriate thermo-hygrometric conditions. Indeed, potential biodeteriogens and microorganisms that are ecologically related to humans were found, suggesting the need to control the conservation environment and improve handling procedures. Microbial loads of air and thermo-hygrometric measurements showed that the repository was not suitable for preventing the microbial deterioration of parchment. A holistic approach to the assessment of risk of microbial deterioration of documents and heritage preservation is proposed for the first time.
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Affiliation(s)
- Federica Troiano
- a a Dipartimento di Scienze per gli Alimenti, la Nutrizione e l'Ambiente (DeFENS) , Università degli Studi di Milano , Milan , Italy
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Porphyromonas gingivalis modulates Pseudomonas aeruginosa-induced apoptosis of respiratory epithelial cells through the STAT3 signaling pathway. Microbes Infect 2013; 16:17-27. [PMID: 24140557 DOI: 10.1016/j.micinf.2013.10.006] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Revised: 09/22/2013] [Accepted: 10/04/2013] [Indexed: 12/31/2022]
Abstract
Pseudomonas aeruginosa is an important opportunistic bacterial pathogen, causing infections of respiratory and other organ systems in immunocompromised hosts that may invade and proliferate in mucosal epithelial cells to induce apoptosis. Previous studies suggest that oral bacteria, especially gram-negative periodontal pathogens, may enhance P. aeruginosa invasion into respiratory epithelial cells to augment tissue destruction. In this study, we investigated the effect of the periodontopathogen Porphyromonas gingivalis on P. aeruginosa-induced epithelial cell apoptosis. P. gingivalis invasion transiently inhibited P. aeruginosa-induced apoptosis in respiratory epithelial cells via the signal transducer and activator of transcription 3 (STAT3) signaling pathway. The activated STAT3 up-regulated the downstream anti-apoptotic moleculars survivin and B-cell leukemia-2 (bcl-2). This process was accompanied by down-regulation of pro-apoptosis molecular Bcl-2-associated death promoter (bad) and caspase-3 activity inhibition. In addition, the activation of the STAT3 pathway was affected by P. gingivalis in a dose-dependent manner. Finally, co-invasion of P. aeruginosa and P. gingivalis led to greater cell death compared with P. aeruginosa challenge alone. These results suggest that regulation of P. aeruginosa-induced apoptosis by P. gingivalis contributes to the pathogenesis of respiratory disease. Interference with this process may provide a potential therapeutic strategy for the treatment and prevention of respiratory disease.
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Assink-de Jong E, Groeneveld ABJ, Pettersson AM, Koek A, Vandenbroucke-Grauls CMJE, Beishuizen A, Simoons-Smit AM. Clinical correlates of herpes simplex virus type 1 loads in the lower respiratory tract of critically ill patients. J Clin Virol 2013; 58:79-83. [PMID: 23731844 DOI: 10.1016/j.jcv.2013.05.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2013] [Revised: 05/05/2013] [Accepted: 05/07/2013] [Indexed: 01/02/2023]
Abstract
BACKGROUND The significance of isolation of herpes simplex virus (HSV) type 1 from the lower respiratory tract in critically ill patients on mechanical ventilation is still unclear. In the current study, we used polymerase chain reaction techniques to quantify HSV-1 to further evaluate its role. OBJECTIVES The hypothesis was that high loads reflect invasive pulmonary disease related to prolonged mechanical ventilation and increased mortality, as opposed to shedding from the upper respiratory tract, which leads to lower viral loads. STUDY DESIGN We prospectively studied 77 consecutive patients admitted to the intensive care unit and analyzed 136 tracheal aspirates or bronchoalveolar lavage fluids, taken when clinically indicated in the diagnostic workup of fever, radiologic pulmonary infiltrates, progressive respiratory insufficiency or combinations. Samples were cultured for bacteria and yeasts according to routine microbiological methods and HSV-1 loads were determined by real time quantitative PCR. Viral loads were expressed per number of cells recovered. RESULTS HSV-1 load was directly related to the simplified acute physiology score II (rs=0.47, P=0.04) when the first specimen taken proved positive for HSV-1. HSV-1 positivity concurred with Candida spp. colonization. Patients with and without a HSV-1 load did not differ with respect to pulmonary and systemic courses and vital outcomes. CONCLUSIONS The data suggest that HSV-1 in the lower respiratory tract originates from shedding in the upper respiratory tract in about 30% of critically ill patients, following immune suppression and reactivation, without invasively infecting the lung. No attributable mortality was observed.
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Abstract
The link between oral infections and adverse systemic conditions has attracted much attention in the research community. Several mechanisms have been proposed, including spread of the oral infection due to transient bacteremia resulting in bacterial colonization in extra-oral sites, systemic injury by free toxins of oral pathogens, and systemic inflammation caused by soluble antigens of oral pathogens. Mounting evidence supports a major role of the systemic spread of oral commensals and pathogens to distant body sites causing extra-oral infections and inflammation. We review here the most recent findings on systemic infections and inflammation complicated by oral bacteria, including cardiovascular disease, adverse pregnancy outcomes, rheumatoid arthritis, inflammatory bowel disease and colorectal cancer, respiratory tract infections, and organ inflammations and abscesses. The recently identified virulence mechanisms of oral species Fusobacterium nucleatum, Porphyromonas gingivalis, Streptococcus mutans, and Campylobacter rectus are also reviewed. A pattern emerges indicating that only select subtype(s) of a given species, e.g., F. nucleatum subspecies animalis and polymorphum and S. mutans non-c serotypes, are prone to extra-oral translocation. These findings advocate the importance of identification and quantification of potential pathogens at the subtype levels for accurate prediction of disease potential.
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Affiliation(s)
- Y W Han
- Department of Periodontics, Case Western Reserve University, Cleveland, OH 44106, USA.
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Bartelli TF, Ferreira RC, Colombo AL, Briones MR. Intraspecific comparative genomics of Candida albicans mitochondria reveals non-coding regions under neutral evolution. INFECTION GENETICS AND EVOLUTION 2013; 14:302-12. [DOI: 10.1016/j.meegid.2012.12.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2012] [Revised: 12/10/2012] [Accepted: 12/11/2012] [Indexed: 11/28/2022]
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Heo SM, Sung RS, Scannapieco FA, Haase EM. Genetic relationships between Candida albicans strains isolated from dental plaque, trachea, and bronchoalveolar lavage fluid from mechanically ventilated intensive care unit patients. J Oral Microbiol 2011; 3:JOM-3-6362. [PMID: 21731911 PMCID: PMC3124833 DOI: 10.3402/jom.v3i0.6362] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2011] [Revised: 05/19/2011] [Accepted: 05/20/2011] [Indexed: 11/14/2022] Open
Abstract
Candida albicans often resides in the oral cavity of healthy humans as a harmless commensal organism. This opportunistic fungus can cause significant disease in critically ill patients, such as those undergoing mechanical ventilation in the intensive care unit (ICU) having compromised local airway defense mechanisms. The goal of this study was to determine the intra- and inter-patient genetic relationship between strains of C. albicans recovered from dental plaque, tracheal secretions, and the lower airway by bronchoalveolar lavage of patients undergoing mechanical ventilation. Three pulsed-field gel electrophoresis (PFGE) typing methods were used to determine the genetic relatedness of the C. albicans strains, including electrophoretic karyotyping (EK) and restriction endonuclease analysis of the genome using SfiI (REAG-S) and BssHII (REAG-B). The C. albicans isolates from dental plaque and tracheo-bronchial sites from the same patient were genetically indistinguishable and retained over time, whereas strains from different patients usually separated into different genotypes. Among the three methods, REAG-B proved to be the most discriminatory method to differentiate isolates. The finding of genetically similar strains from the oral and tracheo-bronchial sites from the same patient supports the notion that the oral cavity may serve as an important source for C. albicans spread to the trachea and lung of mechanically ventilated patients.
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Affiliation(s)
- Seok-Mo Heo
- Department of Oral Biology, University at Buffalo, The State University of New York, Buffalo, NY, USA
- Periodontics and Endodontics, University at Buffalo, The State University of New York, Buffalo, NY, USA
| | - Robert S. Sung
- Department of Oral Biology, University at Buffalo, The State University of New York, Buffalo, NY, USA
| | - Frank A. Scannapieco
- Department of Oral Biology, University at Buffalo, The State University of New York, Buffalo, NY, USA
| | - Elaine M. Haase
- Department of Oral Biology, University at Buffalo, The State University of New York, Buffalo, NY, USA
- Elaine M. Haase, University at Buffalo, Department of Oral Biology, 109 Foster Hall, 3435 Main Street, Buffalo, NY 14214. Tel: 716-829-2520. Fax: 716-829-3942.
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