1
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Oberbach A, Schlichting N, Hagl C, Lehmann S, Kullnick Y, Friedrich M, Köhl U, Horn F, Kumbhari V, Löffler B, Schmidt F, Joskowiak D, Born F, Saha S, Bagaev E. Four decades of experience of prosthetic valve endocarditis reflect a high variety of diverse pathogens. Cardiovasc Res 2022; 119:410-428. [PMID: 35420122 DOI: 10.1093/cvr/cvac055] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 03/04/2022] [Accepted: 03/23/2022] [Indexed: 01/18/2023] Open
Abstract
Prosthetic valve endocarditis (PVE) remains a serious condition with a high mortality rate. Precise identification of the PVE-associated pathogen/s and their virulence is essential for successful therapy, and patient survival. The commonly described PVE-associated pathogens are staphylococci, streptococci and enterococci, with Staphylococcus aureus being the most frequently diagnosed species. Furthermore, multi-drug resistance pathogens are increasing in prevalence, and continue to pose new challenges mandating a personalized approach. Blood cultures in combination with echocardiography are the most common methods to diagnose PVE, often being the only indication, it exists. In many cases, the diagnostic strategy recommended in the clinical guidelines does not identify the precise microbial agent and to frequently, false negative blood cultures are reported. Despite the fact that blood culture findings are not always a good indicator of the actual PVE agent in the valve tissue, only a minority of re-operated prostheses are subjected to microbiological diagnostic evaluation. In this review, we focus on the diversity and the complete spectrum of PVE-associated bacterial, fungal and viral pathogens in blood, and prosthetic heart valve, their possible virulence potential, and their challenges in making a microbial diagnosis. We are curious to understand if the unacceptable high mortality of PVE is associated with the high number of negative microbial findings in connection with a possible PVE. Herein, we discuss the possibilities and limits of the diagnostic methods conventionally used and make recommendations for enhanced pathogen identification. We also show possible virulence factors of the most common PVE-associated pathogens and their clinical effects. Based on blood culture, molecular biological diagnostics, and specific valve examination, better derivations for the antibiotic therapy as well as possible preventive intervention can be established in the future.
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Affiliation(s)
- Andreas Oberbach
- Department of Cardiac Surgery, Ludwig Maximilian University, Munich, Germany.,Fraunhofer Institute for Cell Therapy and Immunology, Department of Diagnostics, Leipzig, Germany
| | - Nadine Schlichting
- Fraunhofer Institute for Cell Therapy and Immunology, Department of Diagnostics, Leipzig, Germany.,Institute of Clinical Immunology, University of Leipzig, Leipzig, Germany
| | - Christian Hagl
- Department of Cardiac Surgery, Ludwig Maximilian University, Munich, Germany.,Munich Heart Alliance, Partner Site German Centre for Cardiovascular Disease (DZHK), Munich, Germany
| | - Stefanie Lehmann
- Fraunhofer Institute for Cell Therapy and Immunology, Department of Diagnostics, Leipzig, Germany.,Institute of Clinical Immunology, University of Leipzig, Leipzig, Germany
| | - Yvonne Kullnick
- Fraunhofer Institute for Cell Therapy and Immunology, Department of Diagnostics, Leipzig, Germany.,Institute of Clinical Immunology, University of Leipzig, Leipzig, Germany
| | - Maik Friedrich
- Fraunhofer Institute for Cell Therapy and Immunology, Department of Diagnostics, Leipzig, Germany.,Institute of Clinical Immunology, University of Leipzig, Leipzig, Germany
| | - Ulrike Köhl
- Fraunhofer Institute for Cell Therapy and Immunology, Department of Diagnostics, Leipzig, Germany.,Institute of Clinical Immunology, University of Leipzig, Leipzig, Germany
| | - Friedemann Horn
- Fraunhofer Institute for Cell Therapy and Immunology, Department of Diagnostics, Leipzig, Germany.,Institute of Clinical Immunology, University of Leipzig, Leipzig, Germany
| | - Vivek Kumbhari
- Department of Medicine, Division of Gastroenterology and Hepatology, Mayo Clinic, Florida, USA
| | - Bettina Löffler
- Institute of Medical Microbiology, Jena University Hospital, Jena, Germany
| | - Frank Schmidt
- Proteomics Core, Weill Cornell Medical Centre Qatar, Doha, Qatar
| | - Dominik Joskowiak
- Department of Cardiac Surgery, Ludwig Maximilian University, Munich, Germany
| | - Frank Born
- Department of Cardiac Surgery, Ludwig Maximilian University, Munich, Germany
| | - Shekhar Saha
- Department of Cardiac Surgery, Ludwig Maximilian University, Munich, Germany
| | - Erik Bagaev
- Department of Cardiac Surgery, Ludwig Maximilian University, Munich, Germany
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2
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Li D, Liu R, Wang M, Peng R, Fu S, Fu A, Le J, Yao Q, Yuan T, Chi H, Mu X, Sun T, Liu H, Yan P, Wang S, Cheng S, Deng Z, Liu Z, Wang G, Li Y, Liu T. 3β-Hydroxysteroid dehydrogenase expressed by gut microbes degrades testosterone and is linked to depression in males. Cell Host Microbe 2022; 30:329-339.e5. [PMID: 35108497 DOI: 10.1016/j.chom.2022.01.001] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 10/29/2021] [Accepted: 01/05/2022] [Indexed: 12/17/2022]
Abstract
Testosterone deficiency can lead to depressive symptoms in humans; however, the causes of this deficiency are incompletely understood. Here, we isolated Mycobacterium neoaurum from the fecal samples of testosterone-deficient patients with depression and showed that this strain could degrade testosterone in vitro. Furthermore, gavaging rats with M. neoaurum reduced their serum and brain testosterone levels and induced depression-like behaviors. We identified the gene encoding 3β-hydroxysteroid dehydrogenase (3β-HSD) as the enzyme causing testosterone degradation. Introducing 3β-HSD into Escherichia coli enhanced its ability to degrade testosterone. Gavaging rats with 3β-HSD-producing E. coli reduced their serum and brain testosterone levels and caused depression-like behaviors. Finally, compared with 16.67% of participants without depression, 42.99% (46/107) of the fecal samples of patients with depression harbored 3β-HSD, and 60.87% (28/46) of these fecal samples expressed 3β-HSD. These results suggest that 3β-HSD expressed by gut microbes may be associated with depressive symptoms due to testosterone degradation.
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Affiliation(s)
- Di Li
- Department of Clinical Laboratory, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China
| | - Ran Liu
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan, Hubei 430072, China; CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong 518055, China
| | - Ming Wang
- Department of Clinical Laboratory, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China
| | - Rui Peng
- Department of Clinical Laboratory, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China
| | - Shuai Fu
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan, Hubei 430072, China
| | - Aisi Fu
- Wuhan Dgensee Clinical Laboratory Co., Ltd., Wuhan, Hubei 430075, China
| | - Juan Le
- Department of Clinical Laboratory, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China
| | - Qian Yao
- Department of Clinical Laboratory, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China
| | - Tengfei Yuan
- Department of Clinical Laboratory, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China
| | - Haoming Chi
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan, Hubei 430072, China
| | - Xin Mu
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan, Hubei 430072, China
| | - Ting Sun
- Department of Clinical Laboratory, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China
| | - Hang Liu
- Department of Clinical Laboratory, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China
| | - Pan Yan
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan, Hubei 430072, China
| | - Shaoting Wang
- Department of Clinical Laboratory, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China
| | - Shu Cheng
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan, Hubei 430072, China
| | - Zixin Deng
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan, Hubei 430072, China
| | - Zhongchun Liu
- Department of Psychiatry, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China.
| | - Gaohua Wang
- Department of Psychiatry, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China.
| | - Yan Li
- Department of Clinical Laboratory, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China.
| | - Tiangang Liu
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan, Hubei 430072, China.
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3
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Kusano T, Fukasawa C, Yamamoto S, Shiratori E, Murata S, Takaki A, Chikamatsu K, Mitarai S, Hoshino T. Pin tract infection caused by Mycobacterium neoaurum in a 14-year-old child: A case report. J Infect Chemother 2021; 27:1244-1247. [PMID: 33745809 DOI: 10.1016/j.jiac.2021.03.005] [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: 08/31/2020] [Revised: 02/24/2021] [Accepted: 03/04/2021] [Indexed: 10/21/2022]
Abstract
Although rapidly growing non-tuberculosis mycobacterium can occasionally cause postoperative infections, Mycobacterium neoaurum is a rare pathogen of surgical site infection. We report a case of pin tract infection caused by M. neoaurum in a 14-year-old girl who was admitted for lengthening of her right fourth metatarsal bone. Pain, redness, and exudate were observed 18 days after external fixator insertion. Repeated exudate cultures revealed M. neoaurum, and she was diagnosed with a mycobacterial pin tract infection. She was initially administered intravenous ciprofloxacin and minocycline, and then was switched to oral trimethoprim-sulfamethoxazole and minocycline for a total of 6 months. Despite the pin tract infection, bone lengthening was completed under antibiotic treatment without removal of the pin; no other complications were noted. There are no prior reports of external fixator pin tract infection by M. neoaurum. While such cases may be rare, this case demonstrates that bone distraction may still be successfully completed using appropriate antibiotic therapy without pin removal.
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Affiliation(s)
- Taizo Kusano
- Chiba Children's Hospital, Division of Infectious Diseases, Chiba, Japan.
| | - Chie Fukasawa
- Chiba Children's Hospital, Division of Infectious Diseases, Chiba, Japan
| | - Shota Yamamoto
- Chiba Children's Hospital, Division of Infectious Diseases, Chiba, Japan
| | - Erika Shiratori
- Chiba Children's Hospital, Division of Infectious Diseases, Chiba, Japan
| | - Shota Murata
- Chiba University Hospital, Department of Clinical Laboratory, Chiba, Japan
| | - Akiko Takaki
- Department of Mycobacterium Reference and Research, The Research Institute of Tuberculosis, Japan Anti-tuberculosis Association, Kiyose, Japan
| | - Kinuyo Chikamatsu
- Department of Mycobacterium Reference and Research, The Research Institute of Tuberculosis, Japan Anti-tuberculosis Association, Kiyose, Japan
| | - Satoshi Mitarai
- Department of Mycobacterium Reference and Research, The Research Institute of Tuberculosis, Japan Anti-tuberculosis Association, Kiyose, Japan; Basic Mycobacteriosis, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Tadashi Hoshino
- Chiba Children's Hospital, Division of Infectious Diseases, Chiba, Japan
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4
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Walayat S, Awwal T, Roy M, Ahmad S. Mycobacterium neoaurum line-related bacteremia with pulmonary involvement: Case report and review of literature. IDCases 2018; 11:88-90. [PMID: 29552489 PMCID: PMC5849790 DOI: 10.1016/j.idcr.2018.01.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2018] [Revised: 01/14/2018] [Accepted: 01/14/2018] [Indexed: 12/13/2022] Open
Abstract
Mycobacterium neoaurum is a rapidly growing non-tuberculous mycobacterium which is ubiquitous in nature. While it can cause line related infections in immunocompromised host, case reports of urinary tract infections, cutaneous infections, pulmonary infections, and meningoencephalitis have also been reported. We report the first case of Mycobacterium neoaurum line related bacteremia with concomitant pulmonary involvement. Our patient responded well to a nine week course of antimicrobials after removal of infected central line.
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5
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Bian SN, Zhang LF, Zhang YQ, Yang QW, Wang P, Xu YC, Shi XC, Liu XQ. Clinical and Laboratory Characteristics of Patients with Nontuberculous Mycobacterium Bloodstream Infection in a Tertiary Referral Hospital in Beijing, China. Chin Med J (Engl) 2017; 129:2220-5. [PMID: 27625095 PMCID: PMC5022344 DOI: 10.4103/0366-6999.189920] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Background: Nontuberculous Mycobacterium (NTM) bloodstream infection (BSI) is relatively rare. We aimed in this study to evaluate the clinical characteristics, laboratory evaluation, and outcomes of patients with NTM BSI. Methods: We retrospectively reviewed the clinical records of inpatients with NTM BSI at our institution between January 2008 and January 2015 and recorded clinical parameters including age, gender, underlying disease, clinical manifestation, organs involved with NTM disease, species of NTM, laboratory data, treatment and outcome of these patients. We also reviewed the reported cases and case series of NTM BSI by searching PubMed, EMBASE, and Wanfang databases. Data of normal distribution were expressed by mean ± standard deviation (SD). Data of nonnormal distribution were expressed by median and interquartile range (IQR). Results: Among the ten patients with NTM BSI, the median age was 51 years (IQR 29–57 years) and three patients were males. Eight patients were immunocompromised, with underlying diseases including human immunodeficiency virus (HIV) infection (one patient), rheumatic diseases (two patients), breast cancer (one patient), myelodysplastic syndrome (two patients), and aplastic anemia (two patients). Other organ(s) involved were lung (two patients), endocardium (two patients), brain, spinal cord, and soft tissue (one each patient). The median lymphocyte was 0.66 × 109/L (IQR 0.24–1.93 × 109/L). The median cluster of differentiation 4 (CD4) cell count was 179/mm3 (IQR 82–619/mm3). Five patients died (three with hematological diseases, one with breast cancer, and one with rheumatic disease), three recovered, and two were lost to follow-up. Conclusions: We reported all cases in our hospital diagnosed with bloodstream NTM infection that was rarely reported. In this group of patients, patients usually had a high fever and could have multiple organ involvements. All patients with poor prognosis had underlying diseases.
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Affiliation(s)
- Sai-Nan Bian
- Department of Infectious Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - Li-Fan Zhang
- Department of Infectious Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College; Clinical Epidemiology Unit, International Epidemiology Network, Peking Union Medical College, Beijing 100730, China
| | - Yue-Qiu Zhang
- Department of Infectious Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - Qi-Wen Yang
- Laboratory Department, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - Peng Wang
- Laboratory Department, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - Ying-Chun Xu
- Laboratory Department, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - Xiao-Chun Shi
- Department of Infectious Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - Xiao-Qing Liu
- Department of Infectious Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College; Clinical Epidemiology Unit, International Epidemiology Network, Peking Union Medical College, Beijing 100730, China
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Zaragoza Bastida A, Rivero Pérez N, Valladares Carranza B, Isaac-Olivé K, Moreno Pérez P, Sandoval Trujillo H, Ramírez Durán N. Molecular Identification of Mycobacterium Species of Public Health and Veterinary Importance from Cattle in the South State of México. THE CANADIAN JOURNAL OF INFECTIOUS DISEASES & MEDICAL MICROBIOLOGY = JOURNAL CANADIEN DES MALADIES INFECTIEUSES ET DE LA MICROBIOLOGIE MEDICALE 2017; 2017:6094587. [PMID: 28694831 PMCID: PMC5488153 DOI: 10.1155/2017/6094587] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Revised: 05/12/2017] [Accepted: 05/21/2017] [Indexed: 11/30/2022]
Abstract
Mycobacterium genus causes a variety of zoonotic diseases. The best known example is the zoonotic tuberculosis due to M. bovis. Much less is known about "nontuberculous mycobacteria (NTM)," which are also associated with infections in humans. The Mexican standard NOM-ZOO-031-1995 regulates the presence of M. bovis in cattle; however, no regulation exists for the NTM species. The objective of this study was to isolate and identify nontuberculous mycobacteria species from cattle of local herds in the south region of the State of Mexico through the identification and detection of the 100 bp molecular marker in the 23S rRNA gene with subsequent sequencing of the 16S rRNA gene. Milk samples (35) and nasal exudate samples (68) were collected. From the 108 strains isolated, 39 were selected for identification. Thirteen strains isolated from nasal exudates amplified the 100 bp molecular marker and were identified as M. neoaurum (six strains), M. parafortuitum (four strains), M. moriokaense (two strains), and M. confluentis (one strain). Except M. parafortuitum, the other species identified are of public health and veterinary concern because they are pathogenic to humans, especially those with underlying medical conditions.
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Affiliation(s)
- Adrian Zaragoza Bastida
- Facultad de Medicina, Universidad Autónoma del Estado de México, Paseo Tollocan/Jesús Carranza s/n, 50180 Toluca, MEX, Mexico
- Área Académica de Medicina Veterinaria y Zootecnia, Instituto de Ciencias Agropecuaria, Universidad Autónoma del Estado de Hidalgo, Av. Universidad Km 1, Ex-Hda. de Aquetzalpa, 43600 Tulancingo, HGO, Mexico
| | - Nallely Rivero Pérez
- Área Académica de Medicina Veterinaria y Zootecnia, Instituto de Ciencias Agropecuaria, Universidad Autónoma del Estado de Hidalgo, Av. Universidad Km 1, Ex-Hda. de Aquetzalpa, 43600 Tulancingo, HGO, Mexico
| | - Benjamín Valladares Carranza
- Centro de Investigación y Estudios Avanzados en Salud Animal, Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma del Estado de México, Km 15.5 Carretera Panamericana Toluca-Atlacomulco, 50200 Toluca, MEX, Mexico
| | - Keila Isaac-Olivé
- Facultad de Medicina, Universidad Autónoma del Estado de México, Paseo Tollocan/Jesús Carranza s/n, 50180 Toluca, MEX, Mexico
| | - Pablo Moreno Pérez
- Facultad de Medicina, Universidad Autónoma del Estado de México, Paseo Tollocan/Jesús Carranza s/n, 50180 Toluca, MEX, Mexico
| | - Horacio Sandoval Trujillo
- Departamento de Sistemas Biológicos, Universidad Autónoma Metropolitana-Xochimilco, Calzada del Hueso 1100, 04960 Ciudad de México, Mexico
| | - Ninfa Ramírez Durán
- Facultad de Medicina, Universidad Autónoma del Estado de México, Paseo Tollocan/Jesús Carranza s/n, 50180 Toluca, MEX, Mexico
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7
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Laboratory Approach to the Diagnosis of Culture-Negative Infective Endocarditis. Heart Lung Circ 2017; 26:763-771. [PMID: 28372886 DOI: 10.1016/j.hlc.2017.02.009] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Accepted: 02/01/2017] [Indexed: 12/31/2022]
Abstract
Blood-culture negative endocarditis (BCNE) accounts for up to 35% of all cases of infective endocarditis (IE) and is a serious life-threatening condition with considerable morbidity and mortality. Rapid detection and identification of the causative pathogen is essential for timely, directed therapy. Blood-culture negative endocarditis presents a diagnostic and therapeutic challenge. Causes of BCNE are varied including: treatment with antibiotic agents prior to blood culture collection; sub-optimal specimen collection; and/or infection due to fastidious (eg. nutritionally variant streptococci), intracellular (eg. Coxiella burnetii, Bartonella species) or non-culturable or difficult to culture organisms (eg. Mycobacteria, Tropheryma whipplei and fungi); as well as non-infective aetiologies. Here, we review aetiological and diagnostic approaches to BCNE including newer molecular based techniques, with a brief summary of imaging investigation and treatment principles.
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8
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Bacteremia with an Unusual Pathogen: Mycobacterium neoaurum. Case Rep Infect Dis 2016; 2016:5167874. [PMID: 27807489 PMCID: PMC5078649 DOI: 10.1155/2016/5167874] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Accepted: 09/20/2016] [Indexed: 11/17/2022] Open
Abstract
Mycobacterium neoaurum (M. neoaurum) is an infrequently encountered cause of infection in humans. It is a member of the rapidly growing mycobacteria family. It predominately afflicts those with a compromised immune status and a chronically indwelling vascular access. Isolation of this organism is challenging yet the advent of 16s ribosomal sequencing paved the way for more sensitive detection. No treatment guidelines are available and treatment largely depends on the experience of the treating physician and nature of the isolate. We report a case of M. neoaurum bacteremia in an immune competent host, with a chronically placed peripherally inserted central catheter (PICC line).
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9
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Yuan SM. Mycobacterial endocarditis: a comprehensive review. Braz J Cardiovasc Surg 2015; 30:93-103. [PMID: 25859873 PMCID: PMC4389517 DOI: 10.5935/1678-9741.20140113] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2014] [Accepted: 09/30/2014] [Indexed: 11/20/2022] Open
Abstract
OBJECTIVE A systematic analysis was made in view of the epidemiology, clinical features, diagnosis, treatment and main outcomes of mycobacterial endocarditis. METHODS The data source of the present study was based on a comprehensive literature search in MEDLINE, Highwire Press and Google search engine for publications on mycobacterial endocarditis published between 2000 and 2013. RESULTS The rapidly growing mycobacteria become the predominant pathogens with Mycobacterium chelonae being the most common. This condition has changed significantly in terms of epidemiology since the 21st century, with more broad patient age range, longer latency, prevailed mitral valve infections and better prognosis. CONCLUSION Mycobacterial endocarditis is rare and the causative pathogens are predominantly the rapidly growing mycobacteria. Amikacin, ciprofloxacin and clarithromycin are the most frequently used targeted antimicrobial agents but often show poor responses. Patients with deep infections may warrant a surgical operation or line withdrawal. With periodic multidrug therapy guided by drug susceptibility testing, and surgical managements, patients may achieve good therapeutic results.
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Affiliation(s)
- Shi-Min Yuan
- Teaching Hospital, Fujian Medical University, Putian, People's Republic of China
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10
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Brown-Pigmented Mycobacterium mageritense as a Cause of Prosthetic Valve Endocarditis and Bloodstream Infection. J Clin Microbiol 2015; 53:2777-80. [PMID: 26063854 DOI: 10.1128/jcm.01041-15] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2015] [Accepted: 06/03/2015] [Indexed: 02/03/2023] Open
Abstract
Mycobacterium spp. are a rare cause of endocarditis. Herein, we describe a case of Mycobacterium mageritense prosthetic valve endocarditis. This organism produced an unusual brown pigment on solid media. Cultures of valve tissue for acid-fast bacilli might be considered in some cases of apparently culture-negative prosthetic valve endocarditis.
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11
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Rapidly growing mycobacteria as emerging pathogens in bloodstream and device-related infection: a case of pacemaker infection with Mycobacterium neoaurum. JMM Case Rep 2015. [DOI: 10.1099/jmmcr.0.000054] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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12
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Abstract
We report the draft genome sequence of Mycobacterium neoaurum strain DSM 44074T, a nontuberculosis species responsible for opportunistic infections in immunocompromised patients. The strain described here is composed of 5,536,033 bp, with a G+C content of 66.24%, and carries 5,274 protein-coding genes and 72 RNA genes.
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