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Moore AE, Ngo T, Donald J, Shorey S, Sivakumar R, Velagapudi V, Walker CM. Radiologic Manifestations of Mycobacterium chimaera Infection After Open Heart Surgery. J Thorac Imaging 2024; 39:304-311. [PMID: 38662632 DOI: 10.1097/rti.0000000000000779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/23/2024]
Abstract
PURPOSE The objective of this study is to identify and detail the radiologic manifestations of surgical site and disseminated Mycobacterium chimaera ( MC) infection. The aim is to facilitate early identification and diagnosis of MC, considering its indolent nature and the challenges involved in clinically and pathologically establishing the diagnosis. PATIENTS AND METHODS This was a retrospective cohort study reviewing computed tomography (CT), positron emission tomography (PET)/CT, and magnetic resonance imaging examinations in patients over the age of 18 years with a history of open heart surgery and a clinical or pathologic diagnosis of MC. Two radiology residents, a fellowship-trained nuclear medicine radiologist, and a fellowship-trained cardiothoracic radiologist performed consensus reads to determine the imaging findings seen in MC infection. RESULTS Twenty-five patients were included. Localized, surgical site infection was more common than disseminated disease. Typical CT findings included peristernal soft tissue thickening, sinus tracts often extending to the cutaneous surface, slowly enlarging fluid collections, and sternal osteolysis. PET/CT findings demonstrated hypermetabolic activity in nearly all patients localized to sites of infection. Imaging findings for disseminated infection included hepatosplenomegaly, lymphadenopathy, involvement of the central nervous system, discitis/osteomyelitis, and distant abscesses. CONCLUSIONS Imaging plays a vital role in suggesting possible surgical sites and disseminated MC infection acquired from open heart surgery. Radiologists must keep a high index of suspicion given the indolent nature and subtle imaging change over time. PET/CT is most useful in diagnosis and helps in differentiating between a sterile postoperative fluid collection or scarring and active MC infection and helps provide a target for debridement.
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Affiliation(s)
- Andrew E Moore
- Department of Radiology, University of Kansas Medical Center, Kansas, KS
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2
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Vinnakota S, Tarabochia AD, Tan NY, Miranda WR, Sinak LJ, Anavekar NS, Abu Saleh O, Bagameri G, Bennett CE. Multimodal Imaging in Mycobacterium Chimaera Cardiovascular Infections: The Mayo Clinic Experience. Mayo Clin Proc Innov Qual Outcomes 2024; 8:396-405. [PMID: 39100655 PMCID: PMC11294520 DOI: 10.1016/j.mayocpiqo.2024.05.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/06/2024] Open
Abstract
Objective To review the salient features of multimodality cardiovascular imaging in patients with disseminated Mycobacterium chimaera (MC) infections after exposure to contaminated heater-cooler units during cardiopulmonary bypass. Patients and Methods Twelve patients with confirmed MC infection were retrospectively identified after a review from January 1, 2010, to April 30, 2021. The electronic medical records were examined with a focus on transthoracic echocardiography, transesophageal echocardiography, cardiac computed tomography (CT), cardiac magnetic resonance imaging, and positron emission tomography-CT. Results Three (27.3%) patients had diagnostic findings of endocarditis on transthoracic echocardiography, with most patients having nonspecific abnormalities including elevated prosthetic valve gradients or prosthetic leaflet thickening. Transesophageal echocardiography identified 4 (36.7%) patients with vegetations and 3 (27.3%) with aortic root abscess or pseudoaneurysm, with more common findings such as mild aortic root or prosthetic leaflet thickening. Six (50%) patients underwent cardiac CT imaging, which found aortic root pseudoaneurysms or abscesses, prosthetic ring dehiscence, and leaflet thickening. Three (25%) patients underwent cardiac magnetic resonance imaging demonstrating prosthetic valve vegetations, leaflet thickening, and abnormal myocardial delayed enhancement in a noncoronary distribution, suggesting myocarditis. Ten (83%) patients underwent positron emission tomography-CT, 4 (40%) had an abnormal fluorodeoxyglucose uptake around the cardiac prosthetic material, and 7 (70%) had a fluorodeoxyglucose uptake in other organs, suggesting concomitant multiorgan involvement. Conclusion Multimodality cardiovascular imaging is central to the management of patients with disseminated MC and can help establish a preliminary diagnosis while awaiting confirmatory microbiological data, potentially reducing the time to diagnosis. Imaging findings are subtle and atypical, not always meeting classically modified Duke's criteria for infectious endocarditis. Clinicians should have a high index of suspicion for the disease and a low threshold for repeat imaging when initial testing is equivocal.
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Affiliation(s)
- Shravya Vinnakota
- Department of Cardiology, Lahey Hospital and Medical Center, Beverly, MA
| | - Alex D Tarabochia
- Department of Nephrology and Hypertension, Dartmouth Health, Hanover, NH
| | - Nicholas Y Tan
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN
| | | | - Lawrence J Sinak
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN
| | | | - Omar Abu Saleh
- Division of Infectious Diseases, Department of Medicine, Mayo Clinic, Rochester, MN
| | - Gabor Bagameri
- Department of Cardiovascular Surgery, Mayo Clinic, Rochester, MN
| | - Courtney E Bennett
- Department of Cardiology, Heart and Vascular Institute, Lehigh Valley Health Network, Allentown, PA
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3
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Calcagno A, Coppola N, Sarmati L, Tadolini M, Parrella R, Matteelli A, Riccardi N, Trezzi M, Di Biagio A, Pirriatore V, Russo A, Gualano G, Pontali E, Surace L, Falbo E, Mencarini J, Palmieri F, Gori A, Schiuma M, Lapadula G, Goletti D. Drugs for treating infections caused by non-tubercular mycobacteria: a narrative review from the study group on mycobacteria of the Italian Society of Infectious Diseases and Tropical Medicine. Infection 2024; 52:737-765. [PMID: 38329686 PMCID: PMC11142973 DOI: 10.1007/s15010-024-02183-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Accepted: 01/12/2024] [Indexed: 02/09/2024]
Abstract
BACKGROUND Non-tuberculous mycobacteria (NTM) are generally free-living organism, widely distributed in the environment, with sporadic potential to infect. In recent years, there has been a significant increase in the global incidence of NTM-related disease, spanning across all continents and an increased mortality after the diagnosis has been reported. The decisions on whether to treat or not and which drugs to use are complex and require a multidisciplinary approach as well as patients' involvement in the decision process. METHODS AND RESULTS This review aims at describing the drugs used for treating NTM-associated diseases emphasizing the efficacy, tolerability, optimization strategies as well as possible drugs that might be used in case of intolerance or resistance. We also reviewed data on newer compounds highlighting the lack of randomised clinical trials for many drugs but also encouraging preliminary data for others. We also focused on non-pharmacological interventions that need to be adopted during care of individuals with NTM-associated diseases CONCLUSIONS: Despite insufficient efficacy and poor tolerability this review emphasizes the improvement in patients' care and the needs for future studies in the field of anti-NTM treatments.
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Affiliation(s)
- A Calcagno
- Unit of Infectious Diseases, Department of Medical Sciences, University of Turin, Turin, Italy.
- Stop TB Italy, Milan, Italy.
| | - N Coppola
- Infectious Diseases Unit, Section of Infectious Diseases, Department of Mental Health and Public Medicine, University of Campania Luigi Vanvitelli, Naples, Italy
| | - L Sarmati
- Department of System Medicine, Tor Vergata University and Infectious Disease Clinic, Policlinico Tor Vergata, Rome, Italy
| | - M Tadolini
- Stop TB Italy, Milan, Italy
- Infectious Diseases Unit, IRCCS Azienda Ospedaliero-Universitaria Di Bologna, Bologna, Italy
- Department of Medical and Surgical Sciences, Alma Mater Studiorum University of Bologna, Bologna, Italy
| | - R Parrella
- Stop TB Italy, Milan, Italy
- Respiratory Infectious Diseases Unit, Cotugno Hospital, A. O. R. N. dei Colli, Naples, Italy
| | - A Matteelli
- Institute of Infectious and Tropical Diseases, WHO Collaborating Centre for TB Prevention, Department of Clinical and Experimental Sciences, University of Brescia, Brescia, Italy
| | - N Riccardi
- Stop TB Italy, Milan, Italy
- Infectious Diseases Unit, Department of Clinical and Experimental Medicine, Azienda Ospedaliero Universitaria Pisana, University of Pisa, Pisa, Italy
| | - M Trezzi
- Stop TB Italy, Milan, Italy
- Infectious and Tropical Diseases Unit, Department of Medical Sciences, Azienda Ospedaliero-Universitaria Senese, Siena, Italy
| | - A Di Biagio
- Infectious Diseases Unit, San Martino Policlinico Hospital-IRCCS for Oncology and Neurosciences, Genoa, Italy
- Department of Health Sciences (DISSAL), University of Genoa, Genoa, Italy
| | - V Pirriatore
- Stop TB Italy, Milan, Italy
- Unit of Infectious Diseases, "DivisioneA", Ospedale Amedeo di Savoia, ASL CIttà di Torino, Turin, Italy
| | - A Russo
- Infectious Diseases Unit, Section of Infectious Diseases, Department of Mental Health and Public Medicine, University of Campania Luigi Vanvitelli, Naples, Italy
| | - G Gualano
- Stop TB Italy, Milan, Italy
- Respiratory Infectious Diseases Unit, National Institute for Infectious Diseases Lazzaro Spallanzani-IRCCS, Rome, Italy
| | - E Pontali
- Department of Infectious Diseases, Galliera Hospital, Genoa, Italy
| | - L Surace
- Stop TB Italy, Milan, Italy
- Dipartimento Di Prevenzione, Azienda Sanitaria Provinciale di Catanzaro, Centro di Medicina del Viaggiatore e delle Migrazioni, P. O. Giovanni Paolo II, Lamezia Terme, CZ, Italy
| | - E Falbo
- Stop TB Italy, Milan, Italy
- Dipartimento Di Prevenzione, Azienda Sanitaria Provinciale di Catanzaro, Centro di Medicina del Viaggiatore e delle Migrazioni, P. O. Giovanni Paolo II, Lamezia Terme, CZ, Italy
| | - J Mencarini
- Infectious and Tropical Diseases Unit, Careggi University Hospital, Florence, Italy
| | - F Palmieri
- Respiratory Infectious Diseases Unit, National Institute for Infectious Diseases Lazzaro Spallanzani-IRCCS, Rome, Italy
| | - A Gori
- Dipartimento di Fisiopatologia Medico-Chirurgica e dei Trapianti, ASST Fatebenefratelli Sacco-Ospedale Luigi Sacco-Polo Universitario and Università Degli Studi di Milano, Milano, Italy
| | - M Schiuma
- Dipartimento di Fisiopatologia Medico-Chirurgica e dei Trapianti, ASST Fatebenefratelli Sacco-Ospedale Luigi Sacco-Polo Universitario and Università Degli Studi di Milano, Milano, Italy
| | - G Lapadula
- Infectious Diseases Unit, Fondazione IRCCS San Gerardo dei Tintori, University of Milano-Bicocca, Monza, Italy
| | - D Goletti
- Stop TB Italy, Milan, Italy
- Translational Research Unit, Epidemiology Department, National Institute for Infectious Diseases-IRCCS L. Spallanzani, Rome, Italy
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Kobayashi T, Ford B, Diekema DJ, Sekar P. Disseminated Mycobacterium chimaera infection successfully treated with a clofazimine-containing regimen and long-term follow-up after discontinuing treatment. IDCases 2024; 36:e01991. [PMID: 38846029 PMCID: PMC11154623 DOI: 10.1016/j.idcr.2024.e01991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2024] [Accepted: 05/21/2024] [Indexed: 06/09/2024] Open
Abstract
Mycobacterium chimaera is a slow-growing member of the Mycobacterium avium complex. It can contaminate tap water and has been detected in water tanks of heater-cooler devices used during open-heart surgery. Herein we report a case of a 67-year-old- male with disseminated M. chimaera infection who presented with fevers, significant weight loss and was found to have bacteremia with prosthetic valve endocarditis, chorioretinitis, bone marrow and splenic granulomas two years after an open-heart surgery. He developed multiple drug adverse events over the course of treatment but was successfully treated using a clofazimine containing regimen along with aortic valve replacement. He has remained symptom-free with no signs of recurrence three years after completion of antimicrobials. Clofazimine is an effective alternative that can be used as part of a multi-drug regimen in M. chimaera infection when there is resistance to first-line drugs or when adverse drug reactions occur.
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Affiliation(s)
- Takaaki Kobayashi
- Department of Internal Medicine, Division of Infectious Diseases, University of Iowa Hospitals and Clinics, Iowa City, IA, United States
| | - Bradley Ford
- Department of Pathology, University of Iowa Hospitals and Clinics, Iowa City, IA, United States
| | - Daniel J. Diekema
- Department of Internal Medicine, Division of Infectious Diseases, University of Iowa Hospitals and Clinics, Iowa City, IA, United States
- Department of Medicine, Division of Infectious Diseases, Maine Medical Center, Portland, ME, United States
| | - Poorani Sekar
- Department of Internal Medicine, Division of Infectious Diseases, University of Iowa Hospitals and Clinics, Iowa City, IA, United States
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Seidelman JL, Baker AW, Lewis SS, Warren BG, Barrett A, Graves A, King C, Taylor B, Engel J, Bonnadonna D, Milano C, Wallace RJ, Stiegel M, Anderson DJ, Smith BA. A cluster of three extrapulmonary Mycobacterium abscessus infections linked to well-maintained water-based heater-cooler devices. Infect Control Hosp Epidemiol 2024; 45:644-650. [PMID: 38124539 PMCID: PMC11027075 DOI: 10.1017/ice.2023.273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 11/02/2023] [Accepted: 11/12/2023] [Indexed: 12/23/2023]
Abstract
BACKGROUND Various water-based heater-cooler devices (HCDs) have been implicated in nontuberculous mycobacteria outbreaks. Ongoing rigorous surveillance for healthcare-associated M. abscessus (HA-Mab) put in place following a prior institutional outbreak of M. abscessus alerted investigators to a cluster of 3 extrapulmonary M. abscessus infections among patients who had undergone cardiothoracic surgery. METHODS Investigators convened a multidisciplinary team and launched a comprehensive investigation to identify potential sources of M. abscessus in the healthcare setting. Adherence to tap water avoidance protocols during patient care and HCD cleaning, disinfection, and maintenance practices were reviewed. Relevant environmental samples were obtained. Patient and environmental M. abscessus isolates were compared using multilocus-sequence typing and pulsed-field gel electrophoresis. Smoke testing was performed to evaluate the potential for aerosol generation and dispersion during HCD use. The entire HCD fleet was replaced to mitigate continued transmission. RESULTS Clinical presentations of case patients and epidemiologic data supported intraoperative acquisition. M. abscessus was isolated from HCDs used on patients and molecular comparison with patient isolates demonstrated clonality. Smoke testing simulated aerosolization of M. abscessus from HCDs during device operation. Because the HCD fleet was replaced, no additional extrapulmonary HA-Mab infections due to the unique clone identified in this cluster have been detected. CONCLUSIONS Despite adhering to HCD cleaning and disinfection strategies beyond manufacturer instructions for use, HCDs became colonized with and ultimately transmitted M. abscessus to 3 patients. Design modifications to better contain aerosols or filter exhaust during device operation are needed to prevent NTM transmission events from water-based HCDs.
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Affiliation(s)
- Jessica L. Seidelman
- Duke Center for Antimicrobial Stewardship and Infection Prevention, Durham, North Carolina
- Division of Infectious Diseases, Duke University Medical Center, Durham, North Carolina
| | - Arthur W. Baker
- Duke Center for Antimicrobial Stewardship and Infection Prevention, Durham, North Carolina
- Division of Infectious Diseases, Duke University Medical Center, Durham, North Carolina
| | - Sarah S. Lewis
- Duke Center for Antimicrobial Stewardship and Infection Prevention, Durham, North Carolina
- Division of Infectious Diseases, Duke University Medical Center, Durham, North Carolina
| | - Bobby G. Warren
- Duke Center for Antimicrobial Stewardship and Infection Prevention, Durham, North Carolina
- Division of Infectious Diseases, Duke University Medical Center, Durham, North Carolina
- Disinfection, Resistance, Transmission and Epidemiology Laboratory, Department of Medicine, Duke University Medical Center, Durham, North Carolina
| | - Aaron Barrett
- Duke Center for Antimicrobial Stewardship and Infection Prevention, Durham, North Carolina
- Division of Infectious Diseases, Duke University Medical Center, Durham, North Carolina
- Disinfection, Resistance, Transmission and Epidemiology Laboratory, Department of Medicine, Duke University Medical Center, Durham, North Carolina
| | - Amanda Graves
- Duke Center for Antimicrobial Stewardship and Infection Prevention, Durham, North Carolina
- Division of Infectious Diseases, Duke University Medical Center, Durham, North Carolina
- Disinfection, Resistance, Transmission and Epidemiology Laboratory, Department of Medicine, Duke University Medical Center, Durham, North Carolina
| | - Carly King
- Division of Cardiovascular and Thoracic Surgery, Duke University School of Medicine, Durham, North Carolina
| | - Bonnie Taylor
- Division of Infectious Diseases, Duke University Medical Center, Durham, North Carolina
| | - Jill Engel
- Division of Cardiovascular and Thoracic Surgery, Duke University School of Medicine, Durham, North Carolina
| | - Desiree Bonnadonna
- Division of Infectious Diseases, Duke University Medical Center, Durham, North Carolina
| | - Carmelo Milano
- Division of Cardiovascular and Thoracic Surgery, Duke University School of Medicine, Durham, North Carolina
| | - Richard J. Wallace
- Mycobacteria/Nocardia Laboratory, University of Texas Health Science Center, Tyler, Texas
| | - Matthew Stiegel
- Occupational and Environmental Safety Office, Laboratory Safety, Duke University and Health System, Durham, North Carolina
| | - Deverick J. Anderson
- Duke Center for Antimicrobial Stewardship and Infection Prevention, Durham, North Carolina
- Division of Infectious Diseases, Duke University Medical Center, Durham, North Carolina
- Disinfection, Resistance, Transmission and Epidemiology Laboratory, Department of Medicine, Duke University Medical Center, Durham, North Carolina
| | - Becky A. Smith
- Duke Center for Antimicrobial Stewardship and Infection Prevention, Durham, North Carolina
- Division of Infectious Diseases, Duke University Medical Center, Durham, North Carolina
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6
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Paul S, MacNair A, Lostarakos V, Capstick R. Non-tuberculous mycobacterial pulmonary infection presenting in a patient with unilateral pulmonary artery agenesis. BMJ Case Rep 2024; 17:e259125. [PMID: 38589234 PMCID: PMC11015177 DOI: 10.1136/bcr-2023-259125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/10/2024] Open
Abstract
People who have structural or developmental lung disease are more likely to develop non-tuberculous mycobacterial infections. We present the case of a young man in his 30s who had unilateral pulmonary artery agenesis on the right side and presented with a 6-month history of productive cough and fever. His CT scan showed nodular and cavitating lesions on the right side, and sputum analysis confirmed infection with Mycobacterium chimaera He had to undergo modifications in his treatment, including a change from rifampicin to rifabutin due to drug interactions and his amikacin had to be stopped due to signs of vestibular toxicity. Using a multidisciplinary approach, we were able to formulate an appropriate drug regimen for him, and he is now under regular follow-up with infectious diseases and respiratory medicine.
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Affiliation(s)
- Seemab Paul
- Respiratory Medicine, South Tyneside and Sunderland NHS Foundation Trust, South Shields, UK
| | - Andrew MacNair
- Respiratory Medicine, South Tyneside and Sunderland NHS Foundation Trust, South Shields, UK
| | - Vasileios Lostarakos
- Respiratory Medicine, South Tyneside and Sunderland NHS Foundation Trust, South Shields, UK
| | - Richard Capstick
- Infectious diseases, South Tyneside and Sunderland NHS Foundation Trust, South Shields, UK
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7
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Schlotthauer U, Hennemann K, Gärtner BC, Schäfers HJ, Becker SL. Microbiological Surveillance of Heater-Cooler Units Used in Cardiothoracic Surgery for Detection of Mycobacterium chimaera. Thorac Cardiovasc Surg 2024; 72:59-62. [PMID: 36167329 DOI: 10.1055/s-0042-1756630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Abstract
Mycobacterium chimaera is a nontuberculous mycobacterium that was identified as causative agent in a global outbreak of severe infections following open-chest cardiothoracic surgery. Heater-cooler units (HCUs), which were contaminated during the manufacturing process, were elucidated as the origin of this outbreak. Regular surveillance of water-containing HCUs used for cardiac surgery was recommended as one preventive measure. We present data on the occurrence of M. chimaera and other mycobacterial pathogens in different HCUs from one surgical center in Germany over a 42-month period. Water samples and swabs from seven different HCUs were taken between 2015 and 2018, and mycobacteria were detected in 50.6% (78/154) of water samples and 21.1% (4/19) of swabs. M. chimaera accounted for the majority of detected pathogens (77/83 isolates in water samples), but other species such as Mycobacterium gordonae were also found. Despite strict adherence to an intensified, regular disinfection procedure, the majority of HCUs remained positive for mycobacteria until the end of the study. In conclusion, additional measures are needed to reduce the risk of intraoperative transmission of M. chimaera, and our observations underscore the inherent infections risks associated with water-containing medical devices.
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Affiliation(s)
- Uwe Schlotthauer
- Institute of Medical Microbiology and Hygiene, Saarland University, Homburg/Saar, Germany
| | - Kai Hennemann
- Department of Thoracic and Cardiovascular Surgery, Saarland University Medical Center, Homburg/Saar, Germany
| | - Barbara C Gärtner
- Institute of Medical Microbiology and Hygiene, Saarland University, Homburg/Saar, Germany
| | - Hans-Joachim Schäfers
- Department of Thoracic and Cardiovascular Surgery, Saarland University Medical Center, Homburg/Saar, Germany
| | - Sören L Becker
- Institute of Medical Microbiology and Hygiene, Saarland University, Homburg/Saar, Germany
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8
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Cannas A, Campanale A, Minella D, Messina F, Butera O, Nisii C, Mazzarelli A, Fontana C, Lispi L, Maraglino F, Di Caro A, Sabbatucci M. Epidemiological and Molecular Investigation of the Heater-Cooler Unit (HCU)-Related Outbreak of Invasive Mycobacterium chimaera Infection Occurred in Italy. Microorganisms 2023; 11:2251. [PMID: 37764096 PMCID: PMC10536513 DOI: 10.3390/microorganisms11092251] [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: 07/13/2023] [Revised: 09/04/2023] [Accepted: 09/05/2023] [Indexed: 09/29/2023] Open
Abstract
BACKGROUND From 2013 onwards, a large outbreak of Mycobacterium chimaera (MC) invasive infection, which was correlated with the use of contaminated heater-cooler units (HCUs) during open chest surgery, was reported from all over the world. Here, we report the results of the epidemiological and molecular investigations conducted in Italy after the alarm raised about this epidemic event. METHODS MC strains isolated from patients or from HCU devices were characterized by genomic sequencing and molecular epidemiological analysis. RESULTS Through retrospective epidemiological analysis conducted between January 2010 and December 2022, 40 possible cases of patients infected with MC were identified. Thirty-six strains isolated from these patients were analysed by whole genome sequencing (WGS) and were found to belong to the genotypes 1.1 or 1.8, which are the genotypes correlated with the outbreak. Most of the cases presented with prosthetic valve endocarditis, vascular graft infection or disseminated infection. Among the cases found, there were 21 deaths. The same analysis was carried out on HCU devices. A total of 251 HCUs were found to be contaminated by MC; genotypes 1.1 or 1.8 were identified in 28 of those HCUs. CONCLUSIONS To ensure patients' safety and adequate follow-up, clinicians and general practitioners were made aware of the results and public health measures, and recommendations were issued to prevent further cases in the healthcare settings. The Italian Society of Cardiac Surgery performed a national survey to assess the incidence of HCU-related MC prosthetic infections in cardiac surgery. No cases were reported after HCU replacement or structural modification and disinfection and possibly safe allocation outside surgical rooms.
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Affiliation(s)
- Angela Cannas
- National Institute for Infectious Diseases Lazzaro Spallanzani IRCCS, 00149 Rome, Italy; (A.C.); (F.M.); (O.B.); (A.M.); (C.F.)
| | - Antonella Campanale
- Unit 5, Directorate General of Medical Devices and Pharmaceutical Service, Ministry of Health, 00144 Rome, Italy; (A.C.); (D.M.); (L.L.)
| | - Daniela Minella
- Unit 5, Directorate General of Medical Devices and Pharmaceutical Service, Ministry of Health, 00144 Rome, Italy; (A.C.); (D.M.); (L.L.)
| | - Francesco Messina
- National Institute for Infectious Diseases Lazzaro Spallanzani IRCCS, 00149 Rome, Italy; (A.C.); (F.M.); (O.B.); (A.M.); (C.F.)
| | - Ornella Butera
- National Institute for Infectious Diseases Lazzaro Spallanzani IRCCS, 00149 Rome, Italy; (A.C.); (F.M.); (O.B.); (A.M.); (C.F.)
| | - Carla Nisii
- National Institute for Infectious Diseases Lazzaro Spallanzani IRCCS, 00149 Rome, Italy; (A.C.); (F.M.); (O.B.); (A.M.); (C.F.)
| | - Antonio Mazzarelli
- National Institute for Infectious Diseases Lazzaro Spallanzani IRCCS, 00149 Rome, Italy; (A.C.); (F.M.); (O.B.); (A.M.); (C.F.)
| | - Carla Fontana
- National Institute for Infectious Diseases Lazzaro Spallanzani IRCCS, 00149 Rome, Italy; (A.C.); (F.M.); (O.B.); (A.M.); (C.F.)
| | - Lucia Lispi
- Unit 5, Directorate General of Medical Devices and Pharmaceutical Service, Ministry of Health, 00144 Rome, Italy; (A.C.); (D.M.); (L.L.)
| | - Francesco Maraglino
- Unit 5, Directorate General Health Prevention Communicable Diseases and International Prophylaxis, Ministry of Health, 00144 Rome, Italy; (F.M.); (M.S.)
| | - Antonino Di Caro
- Department of Microbiology, Unicamillus International University of Medicine, 00131 Rome, Italy;
| | - Michela Sabbatucci
- Unit 5, Directorate General Health Prevention Communicable Diseases and International Prophylaxis, Ministry of Health, 00144 Rome, Italy; (F.M.); (M.S.)
- Department Infectious Diseases, Istituto Superiore di Sanità, 00161 Rome, Italy
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Trauth J, Matt U, Kohl TA, Niemann S, Herold S. Blind spot in endocarditis guidelines: Mycobacterium chimaera prosthetic valve endocarditis after cardiac surgery-a case series. Eur Heart J Case Rep 2023; 7:ytad400. [PMID: 37654802 PMCID: PMC10468014 DOI: 10.1093/ehjcr/ytad400] [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: 12/16/2022] [Revised: 08/03/2023] [Accepted: 08/15/2023] [Indexed: 09/02/2023]
Abstract
Background The recently published 2023 Duke-ISCVID Criteria for Infective Endocarditis for the first time consider mycobacteria (esp. Mycobacterium chimaera) as 'typical' microorganisms for prosthetic valve endocarditis (major criteria). This reflects the ongoing worldwide outbreak of M. chimaera prosthetic valve endocarditis. Case summary Our case series demonstrates a diagnostic pathway for mycobacterial endocarditis. Symptoms are unspecific, and standard microbiological testing does not result in identification of the causative agent (see Graphical Abstract); therefore patients require special microbiological and imaging diagnostics. One patient with early diagnosis and stringent antibiotic and surgical therapy survived. Two patients with disseminated infection at the time point of diagnosis had fatal outcomes. Discussion The diagnostic approach in our small retrospective case series is in line with the new modified Duke criteria and underlines the diagnostic gap in the previous definitions. Outcome of M. chimaera prosthetic valve endocarditis is related to timely diagnosis and anti-mycobacterial as well as surgical treatment. Non-tuberculous mycobacteria should be given more attention in future endocarditis guidelines.
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Affiliation(s)
- Janina Trauth
- Department of Medicine V—Infectious Diseases, Justus-Liebig-University, Klinikstr 33, 35392 Giessen, Germany
| | - Ulrich Matt
- Department of Medicine V—Infectious Diseases, Justus-Liebig-University, Klinikstr 33, 35392 Giessen, Germany
| | - Thomas A Kohl
- Molecular and Experimental Mycobacteriology, Priority Area Infections, Research Center Borstel, Borstel, Germany
- German Center for Infection Research, Partner Site Hamburg-Lübeck-Borstel-Riems, Borstel, Germany
- National and WHO Supranational Reference Laboratory for Tuberculosis, Research Center Borstel, Borstel, Germany
| | - Stefan Niemann
- Molecular and Experimental Mycobacteriology, Priority Area Infections, Research Center Borstel, Borstel, Germany
- German Center for Infection Research, Partner Site Hamburg-Lübeck-Borstel-Riems, Borstel, Germany
- National and WHO Supranational Reference Laboratory for Tuberculosis, Research Center Borstel, Borstel, Germany
| | - Susanne Herold
- Department of Medicine V—Infectious Diseases, Justus-Liebig-University, Klinikstr 33, 35392 Giessen, Germany
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Wetzstein N, Kohl TA, Diricks M, Mas-Peiro S, Holubec T, Kessel J, Graf C, Koch B, Herrmann E, Vehreschild MJGT, Hogardt M, Niemann S, Stephan C, Wichelhaus TA. Clinical characteristics and outcome of Mycobacterium chimaera infections after cardiac surgery: systematic review and meta-analysis of 180 heater-cooler unit-associated cases. Clin Microbiol Infect 2023; 29:1008-1014. [PMID: 36918144 DOI: 10.1016/j.cmi.2023.03.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Revised: 02/13/2023] [Accepted: 03/05/2023] [Indexed: 03/14/2023]
Abstract
OBJECTIVES Since 2013, heater-cooler unit (HCU) associated Mycobacterium chimaera infections linked to a global outbreak have been described. These infections were characterised by high morbidity and mortality due to delayed diagnosis, as well as challenges in antimycobacterial and surgical therapy. This study aimed to investigate the clinical characteristics and outcome of published cases of HCU-associated M. chimaera infections. METHODS We searched PubMed and the Web of Science until 15 June 2022 for case reports, case series, and cohort studies, without language restriction, on patients with M. chimaera infection and a prior history of cardiac surgery. In this systematic review of case reports, no risk of bias assessment could be performed. Clinical, microbiological, and radiological features were recorded. Logistic regression and time-to-event analyses were performed to identify the potential factors associated with better survival. RESULTS One hundred eighty patients from 54 publications were included. Most patients underwent surgical aortic valve (67.0%; 118/176 of patients with available data) or combined aortic valve and root replacement (15.3%; 27/176). The median period between the time point of surgery and the first symptoms was 17 months (interquartile range 13-26 months). The overall case fatality rate was 45.5% (80/176), with a median survival of 24 months after the initiation of antimycobacterial therapy or diagnosis. A reoperation (including the removal or exchange of foreign material) was associated with better survival in multivariate logistic regression (OR 0.32 for lethal events; 95% CI 0.12-0.79; p 0.015) and in time-to-event analysis (p 0.0094). DISCUSSION This systematic review and meta-analysis confirm the high overall mortality of HCU -associated disseminated M. chimaera infections after cardiac surgery. A reoperation seems to be associated with better survival. Physicians have to stay aware of this infection, as patients might still be present today due to the long latency period.
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Affiliation(s)
- Nils Wetzstein
- Department of Internal Medicine, Infectious Diseases, University Hospital Frankfurt, Goethe University, Frankfurt am Main, Germany.
| | - Thomas A Kohl
- The German Centre for Infection Research (DZIF), partner site Hamburg-Lübeck-Borstel-Riems, Germany; Molecular and Experimental Mycobacteriology, Research Centre Borstel, Borstel, Germany
| | - Margo Diricks
- The German Centre for Infection Research (DZIF), partner site Hamburg-Lübeck-Borstel-Riems, Germany; Molecular and Experimental Mycobacteriology, Research Centre Borstel, Borstel, Germany
| | - Silvia Mas-Peiro
- Department of Internal Medicine, Cardiology, University Hospital Frankfurt, Goethe University, Frankfurt am Main, Germany
| | - Tomas Holubec
- Department of Cardiovascular Surgery, University Hospital Frankfurt, Goethe University Frankfurt, Frankfurt am Main, Germany
| | - Johanna Kessel
- Department of Internal Medicine, Infectious Diseases, University Hospital Frankfurt, Goethe University, Frankfurt am Main, Germany
| | - Christiana Graf
- Department of Internal Medicine, Gastroenterology and Hepatology, University Hospital Frankfurt, Goethe University, Frankfurt am Main, Germany
| | - Benjamin Koch
- Department of Internal Medicine, Nephrology, University Hospital Frankfurt, Goethe University, Frankfurt am Main, Germany
| | - Eva Herrmann
- Institute of Biostatistics and Mathematical Modelling, Goethe University, Frankfurt am Main, Germany
| | - Maria J G T Vehreschild
- Department of Internal Medicine, Infectious Diseases, University Hospital Frankfurt, Goethe University, Frankfurt am Main, Germany
| | - Michael Hogardt
- Institute of Medical Microbiology and Infection Control, University Hospital Frankfurt, Goethe University, Frankfurt am Main, Germany
| | - Stefan Niemann
- The German Centre for Infection Research (DZIF), partner site Hamburg-Lübeck-Borstel-Riems, Germany; Molecular and Experimental Mycobacteriology, Research Centre Borstel, Borstel, Germany
| | - Christoph Stephan
- Department of Internal Medicine, Infectious Diseases, University Hospital Frankfurt, Goethe University, Frankfurt am Main, Germany
| | - Thomas A Wichelhaus
- Institute of Medical Microbiology and Infection Control, University Hospital Frankfurt, Goethe University, Frankfurt am Main, Germany
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11
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Long-Term Follow-Up after Mycobacterium Chimaera Infection Following Cardiac Surgery: Single-Center Experience. J Clin Med 2023; 12:jcm12030948. [PMID: 36769596 PMCID: PMC9917935 DOI: 10.3390/jcm12030948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 01/19/2023] [Accepted: 01/21/2023] [Indexed: 01/28/2023] Open
Abstract
BACKGROUND Disseminated Mycobacterium chimaera (M. chimaera) infection following cardiac surgery has been associated with a high mortality. The long-term impact of surgery and the appropriate surgical approach are still matters of debate. METHODS From 2015 to 2019, seven patients with M. chimaera infection following cardiac surgery were isolated. RESULTS The median incubation time was 30 months (IQR 18-38). Echocardiography was unremarkable in three patients (43%). We decided to redo cardiac surgery in all patients and explanted all previously implanted prosthetic material. All explant cultures yielded M. chimaera. One patient (14%) died in-hospital seven months after the redo surgery. After a median follow-up of 59.6 months (IQR 39.1-69.6), we observed three infection relapses among the survivors (43%), presumably due to concomitant extracardiac infection and recurrent cardiac implant infection. CONCLUSIONS M. chimaera infection following cardiac surgery is associated with a delayed and unspecific clinical presentation. Echocardiogaphy has a limited sensitivity for prosthetic valve infection with M. chimaera, and negative findings should not preclude the surgical decision. The extraction of all previously implanted material is crucial to achieving the source control, as the re-implantation of prosthetic material as well as uncontrolled extracardiac infection at the time of the redo cardiac surgery appear to be key factors for persisting/relapsing infection.
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12
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Dähler R, Brugger SD, Frank M, Greutmann M, Sromicki J, Marques-Maggio E, Imkamp F, Bauernschmitt R, Carrel T, Zinkernagel AS, Hasse B. A retrospective analysis of blood culture-negative endocarditis at a tertiary care centre in Switzerland. Swiss Med Wkly 2022; 152:40012. [PMID: 36534966 DOI: 10.57187/smw.2022.40016] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
AIMS OF THE STUDY Numerous studies from different countries have contributed to an improved understanding of blood culture-negative infective endocarditis. However, little is known about its epidemiology and microbiology in Switzerland. We aimed to assess the epidemiology and microbiology of blood culture-negative endocarditis at the University Hospital Zurich, Switzerland. METHODS We screened all patients hospitalised between 1997 and 2020 with possible or definite endocarditis at our institution. Thereof, we identified all cases with blood culture-negative endocarditis and retrospectively retrieved patient characteristics, microbiological, histopathological, radiographic and surgical data from medical records. RESULTS Among 861 patients screened, 66 (7.7%) cases of blood culture-negative endocarditis were identified. Thereof, 31 cases could be microbiologically documented or not documented (n = 30), and in five cases a non-infectious aetiology was confirmed. Endocarditis predominantly affected men (77%) and the left heart (79%); predisposing factors were prosthetic valves (42%), congenital heart disease (35%) and prior endocarditis (14%). The most common reasons for negative blood cultures were antibiotic treatment prior to blood culture sampling (35%), fastidious and slow growing microorganisms (30%) and definite non-infective endocarditis (8%). Coxiella burnetii and Bartonella spp. were the most common fastidious bacteria identified. In addition to serology, identification of causative microorganisms was possible by microbiological and/or histopathological analysis of tissue samples, of which polymerase chain reaction testing (PCR) of the 16S ribosomal RNA proved to be most successful. CONCLUSIONS The present study provides a detailed analysis of blood culture-negative endocarditis over a time span of more than 20 years in Zurich, Switzerland. Antibiotic treatment prior to blood collection, and fastidious and slow growing organisms were identified as main reasons for sterile blood cultures. Typical culture-negative bacteria were mainly found by PCR and/or culture of tissue samples.
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Affiliation(s)
- Roman Dähler
- Division of Infectious Diseases and Hospital Epidemiology, University Hospital Zurich, University of Zurich, Switzerland
| | - Silvio D Brugger
- Division of Infectious Diseases and Hospital Epidemiology, University Hospital Zurich, University of Zurich, Switzerland
| | - Michelle Frank
- Department of Cardiology, University Heart Center, University Hospital Zurich, University of Zurich, Switzerland
| | - Matthias Greutmann
- Department of Cardiology, University Heart Center, University Hospital Zurich, University of Zurich, Switzerland
| | - Juri Sromicki
- Clinic for Cardiac Surgery, University Hospital Zurich, University of Zurich, Switzerland
| | - Ewerton Marques-Maggio
- Department of Surgical Pathology, University Hospital Zurich, University of Zurich, Switzerland
| | - Frank Imkamp
- Institute of Medical Microbiology, University of Zurich, Switzerland
| | - Robert Bauernschmitt
- Clinic for Cardiac Surgery, University Hospital Zurich, University of Zurich, Switzerland
| | - Thierry Carrel
- Clinic for Cardiac Surgery, University Hospital Zurich, University of Zurich, Switzerland
| | - Annelies S Zinkernagel
- Division of Infectious Diseases and Hospital Epidemiology, University Hospital Zurich, University of Zurich, Switzerland
| | - Barbara Hasse
- Division of Infectious Diseases and Hospital Epidemiology, University Hospital Zurich, University of Zurich, Switzerland
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13
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Clemente T, Spagnuolo V, Bottanelli M, Ripa M, Del Forno B, Busnardo E, Di Lucca G, Castagna A, Danise A. Disseminated Mycobacterium chimaera infection favoring the development of Kaposi's sarcoma: a case report. Ann Clin Microbiol Antimicrob 2022; 21:57. [PMID: 36494813 PMCID: PMC9735029 DOI: 10.1186/s12941-022-00547-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Accepted: 12/02/2022] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Disseminated Mycobacterium chimaera infection is an emerging disease in people undergone to cardiothoracic surgery, which need to be suspected also with atypical presentations. CASE PRESENTATION We report the case of a 74-year-old man with fever of unknown origin, purple nodules on both feet and a history of open-heart surgery. Imaging investigations showed an abscess near aortic bioprosthesis but screening for endocarditis resulted negative and pyrexia did not respond to antibiotic therapy. A biopsy of cutaneous lesions showed HHV8-related Kaposi's sarcoma, so bone marrow biopsy was executed with evidence of HHV8 localization. Bone marrow and urine mycobacterial cultures resulted positive for M. chimaera and a specific antimicrobial therapy was started, with apyrexia after 7 weeks. CONCLUSIONS M. chimaera infection should be always investigated as a possible etiology of fever of unknow origin in people with a history of open-heart surgical intervention, even with negative mycobacterial blood cultures. The possible role of disseminated infection in inducing immunodepression with the occurrence of other opportunistic diseases (such as Kaposi's sarcoma) cannot be excluded.
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Affiliation(s)
- Tommaso Clemente
- grid.15496.3f0000 0001 0439 0892School of Medicine and Surgery, Vita-Salute San Raffaele University, Via Stamira D’Ancona, 20, 20127 Milan, Italy ,grid.18887.3e0000000417581884Infectious Diseases, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Vincenzo Spagnuolo
- grid.18887.3e0000000417581884Infectious Diseases, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Martina Bottanelli
- grid.15496.3f0000 0001 0439 0892School of Medicine and Surgery, Vita-Salute San Raffaele University, Via Stamira D’Ancona, 20, 20127 Milan, Italy ,grid.18887.3e0000000417581884Infectious Diseases, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Marco Ripa
- grid.18887.3e0000000417581884Infectious Diseases, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Benedetto Del Forno
- grid.18887.3e0000000417581884Department of Cardiac Surgery, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Elena Busnardo
- grid.18887.3e0000000417581884Myocarditis Disease Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy ,grid.18887.3e0000000417581884Department of Nuclear Medicine, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Giuseppe Di Lucca
- grid.18887.3e0000000417581884General Medicine and Advanced Care Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Antonella Castagna
- grid.15496.3f0000 0001 0439 0892School of Medicine and Surgery, Vita-Salute San Raffaele University, Via Stamira D’Ancona, 20, 20127 Milan, Italy ,grid.18887.3e0000000417581884Infectious Diseases, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Anna Danise
- grid.18887.3e0000000417581884Infectious Diseases, IRCCS San Raffaele Scientific Institute, Milan, Italy
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14
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Veenis A, Haghnegahdar M, Ajlan R. Mycobacterium chimaera chorioretinitis preceding central nervous system lesions: a case report and review of the literature. BMC Ophthalmol 2022; 22:316. [PMID: 35869478 PMCID: PMC9308188 DOI: 10.1186/s12886-022-02528-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 07/07/2022] [Indexed: 11/17/2022] Open
Abstract
Background Mycobacterium chimaera ocular infection is a rare disease that is linked to bypass devices used during cardiothoracic surgeries. Reported cases in the literature of ocular involvement preceding CNS involvement are based on clinical exam with no neuroimaging. Here we present a case of M. chimaera ocular infection with no CNS M. chimaera lesions on brain magnetic resonance imaging (MRI). Case presentation A 59-year-old female presented with altered mental status and blurred vision in February 2021. Her past medical history was significant for aortic valve replacement and ascending aortic aneurysm repair in 2017 complicated by known M. chimaera infection. She had been receiving azithromycin, ethambutol, rifampin, and amikacin as systemic anti-mycobacterium treatment. Her dilated fundus exam showed numerous yellow placoid circular lesions scattered throughout the macula and peripheral retina in both eyes with associated vitritis. Systemic workup, including brain MRI showed no acute infectious lesions. Her infections workup was unremarkable except for a positive toxoplasma IgM, for which she was treated with sulfamethoxazole/trimethoprim. One month later, a head computed tomography showed new numerous scattered round foci of hyperdensity throughout the cerebrum and brainstem thought to be foci of M. chimaera infection. Clofazimine was added per culture and sensitivity. MRI brain 1 month later showed mild decrease in conspicuity and number of these intensities while on anti-mycobacterium treatment. Her cognition had improved at that time as well. She was seen in retina clinic 2 months later where her exam showed similar retinal lesions with no associated vitritis or anterior chamber cell in bilateral eyes, suggesting a lack of active infection. Optical coherence tomography macula showed parafoveal cystoid macular edema bilaterally. She was started on steroidal and non-steroidal anti-inflammatory eye drops. Conclusions To the best of our knowledge, this is the first case in the literature to report M. chimaera chorioretinitis with concomitant negative neuroimaging. Chorioretinal M. chimaera lesions should motivate high suspicion of CNS involvement prompting early neurological work up.
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15
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Sanchez-Nadales A, Diaz-Sierra A, Mocadie M, Asher C, Gordon S, Xu B. Advanced Cardiovascular Imaging for the Diagnosis of Mycobacterium chimaera Prosthetic Valve Infective Endocarditis After Open-heart Surgery: A Contemporary Systematic Review. Curr Probl Cardiol 2022; 47:101392. [PMID: 36100093 DOI: 10.1016/j.cpcardiol.2022.101392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Accepted: 09/07/2022] [Indexed: 11/18/2022]
Abstract
Mycobacterium chimaera is an opportunistic and emerging pathogen, which has been recognized to cause prosthetic valve infective endocarditis and disseminated infection following open-chest cardiac surgery with certain contaminated heater-cooler systems. Diagnostic evaluation of suspected prosthetic valve infective endocarditis due to Mycobacterium chimaera is challenging and requires a very high index of suspicion. This systematic review aims to evaluate prosthetic valve infective endocarditis due to Mycobacterium chimaera. Based on the current literature review, transesophageal echocardiography and 18F-fluorodeoxyglucose positron emission tomography/computed tomography are the most common imaging modalities used to establish the diagnosis. Based on twenty-two published cases, the reported cases of Mycobacterium chimaera endocarditis have occurred almost entirely in males. Within this cohort, the patients developed endocarditis on average 2.7 years after exposure to contaminated heater-cooler systems during cardiac surgery. Mycobacterium chimaera infection is associated with significant morbidity and mortality.
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Affiliation(s)
| | | | - Michele Mocadie
- Department of Infectious Diseases, University Hospitals, Cleveland, OH
| | - Craig Asher
- Department of Cardiovascular Disease, Cleveland Clinic Florida, Weston FL
| | - Steven Gordon
- Department of Infectious Diseases, Cleveland Clinic, Cleveland, OH
| | - Bo Xu
- Section of Cardiovascular Imaging, Robert and Suzanne Tomsich Department of Cardiovascular Medicine, Sydell and Arnold Miller Family Heart, Vascular and Thoracic Institute, Cleveland Clinic, Cleveland, OH.
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16
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Lin YF, Lee TF, Wu UI, Huang CF, Cheng A, Lin KY, Hung CC. Disseminated Mycobacterium chimaera infection in a patient with adult-onset immunodeficiency syndrome: case report. BMC Infect Dis 2022; 22:665. [PMID: 35915436 PMCID: PMC9344727 DOI: 10.1186/s12879-022-07656-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Accepted: 07/28/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Patients with adult-onset immunodeficiency syndrome due to anti-interferon-γ autoantibodies (AIGAs) are susceptible to disseminated Mycobacterium avium complex (MAC) infections. M. chimaera, a newly identified MAC species, is distinguished from the others due to the reduced virulence. Previous cases of disseminated M. chimaera infection have been linked to cardiothoracic surgery. Reports of disseminated M. chimaera in patients without a history of cardiothoracic surgery are rare. CASE PRESENTATION A 57-year-old Asian man, previously healthy, presented with fever, dry cough, exertional dyspnea, and decreased appetite. The delayed resolution of pneumonia despite antibiotic treatment prompted further imaging studies and biopsies from the lung and lymph node. The fluorodeoxyglucose positron emission tomography/computed tomography (FDG-PET/CT) demonstrated intense uptake in lung consolidations and diffuse lymphadenopathy. Cultures of the specimens obtained from sputum, blood, stool, lung tissue, and lymph node grew M. chimaera. Further immunological evaluation disclosed the presence of neutralizing AIGAs, which possibly led to acquired immunodeficiency and disseminated M. chimaera infection. CONCLUSIONS We herein present the first case of adult-onset immunodeficiency due to AIGAs complicated with disseminated M. chimaera infection. Further immunological evaluation, including AIGAs, may be warranted in otherwise healthy patients who present with disseminated mycobacterial infection.
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Affiliation(s)
- Yi-Fu Lin
- Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, 7 Chung-Shan South Road, Taipei, Taiwan
| | - Tai-Fen Lee
- Department of Laboratory Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - Un-In Wu
- Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, 7 Chung-Shan South Road, Taipei, Taiwan.,Department of Medicine, National Taiwan University Cancer Center, Taipei, Taiwan
| | - Chun-Fu Huang
- Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, 7 Chung-Shan South Road, Taipei, Taiwan
| | - Aristine Cheng
- Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, 7 Chung-Shan South Road, Taipei, Taiwan
| | - Kuan-Yin Lin
- Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, 7 Chung-Shan South Road, Taipei, Taiwan.
| | - Chien-Ching Hung
- Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, 7 Chung-Shan South Road, Taipei, Taiwan.,Department of Tropical Medicine and Parasitology, National Taiwan University College of Medicine, Taipei, Taiwan
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17
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Ahmad M, Yousaf A, Khan HMW, Munir A, Chandran A. Mycobacterium chimaera lung infection and empyema in a patient without cardiopulmonary bypass. Proc AMIA Symp 2022; 35:817-819. [DOI: 10.1080/08998280.2022.2095894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
Affiliation(s)
- Muhammad Ahmad
- Internal Medicine, McLaren Flint–Michigan State University, Flint, Michigan
| | - Amman Yousaf
- Internal Medicine, McLaren Flint–Michigan State University, Flint, Michigan
| | | | - Ahmad Munir
- Cardiovascular Medicine, McLaren Flint–Michigan State University, Flint, Michigan
| | - Arul Chandran
- Pulmonary and Critical Care Medicine, McLaren Flint–Michigan State University, Flint, Michigan
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18
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McLaughlin CM, Schade M, Cochran E, Taylor KF. A Case Report of a Novel Atypical Mycobacterial Infection: Mycobacterium Chimaera Hand Tenosynovitis. JBJS Case Connect 2022; 12:01709767-202209000-00046. [PMID: 36137058 DOI: 10.2106/jbjs.cc.22.00292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Accepted: 07/15/2022] [Indexed: 06/16/2023]
Abstract
CASE A 76-year-old fisherman with a history of diabetes mellitus, coronary artery bypass grafting, and a previous ipsilateral elbow wound presented with a 1-year history of hand pain and swelling. Anti-inflammatories and antibiotics were administered without improvement. Magnetic resonance imaging and ultrasound demonstrated flexor tenosynovitis. Intraoperative cultures revealed Mycobacterium chimaera. The treatment course included 2 tenosynovectomies and a 1-year course of triple antimycobacterial therapy. CONCLUSION Nontuberculous mycobacteria infections should be considered in cases of indolent tenosynovitis. M. chimaera should be considered in patients with a history of cardiopulmonary bypass given its association with cardiopulmonary heater-cooler units.
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Affiliation(s)
- C M McLaughlin
- Penn State Hershey Medical Center, Department of Surgery, Division of Plastic and Reconstructive Surgery, Hershey, Pennsylvania
| | - M Schade
- Penn State Hershey Medical Center, Department of Internal Medicine, Division of Infectious Disease, Hershey, Pennsylvania
| | - E Cochran
- Penn State Hershey Medical Center, Department of Pathology, Hershey, Pennsylvania
| | - K F Taylor
- Penn State Hershey Medical Center, Department of Orthopaedics and Rehabilitation, Division of Hand Surgery, Hershey, Pennsylvania
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19
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Mason M, Gregory E, Foster K, Klatt M, Zoubek S, Eid A. Pharmacologic management of Mycobacterium chimaera Infections: A Primer for Clinicians. Open Forum Infect Dis 2022; 9:ofac287. [PMID: 35866101 PMCID: PMC9297092 DOI: 10.1093/ofid/ofac287] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Accepted: 06/13/2022] [Indexed: 11/28/2022] Open
Abstract
Mycobacterium chimaera, a member of the Mycobacterium avium complex, can cause infections in individuals after open heart surgery due to contaminated heater-cooler units. The diagnosis can be challenging, as the incubation period can be quite variable, and symptoms are nonspecific. In addition to aggressive surgical management, combination pharmacologic therapy is the cornerstone of therapy, which should consist of a macrolide, a rifamycin, ethambutol, and amikacin. Multiple second-line agents may be utilized in the setting of intolerances or toxicities. In vitro susceptibility of these agents is similar to activity against other species in the Mycobacterium avium complex. Drug–drug interactions are frequently encountered, as many individuals have chronic medical comorbidities and are prescribed medications that interact with the first-line agents used to treat M. chimaera. Recognition of these drug–drug interactions and appropriate management are essential for optimizing treatment outcomes.
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Affiliation(s)
- Matt Mason
- The University of Kansas Health System, Department of Pharmacy , Kansas City, KS , USA
| | - Eric Gregory
- The University of Kansas Health System, Department of Pharmacy , Kansas City, KS , USA
| | - Keith Foster
- The University of Kansas Health System, Department of Pharmacy , Kansas City, KS , USA
| | - Megan Klatt
- The University of Kansas Health System, Department of Pharmacy , Kansas City, KS , USA
| | - Sara Zoubek
- The University of Kansas Health System, Department of Pharmacy , Kansas City, KS , USA
| | - Albert Eid
- Kansas University Medical Center, Department of Infectious Diseases , Kansas City, KS , USA
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20
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Provenzano N, Boris J, Nelluri B, Berman L, Singer R, You H. An Unusual Case of Prosthetic Valve Endocarditis. Cureus 2022; 14:e25735. [PMID: 35812612 PMCID: PMC9270098 DOI: 10.7759/cureus.25735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/07/2022] [Indexed: 11/05/2022] Open
Abstract
Mycobacterium chimaera is a slow-growing nontuberculous mycobacterium. It has been identified as a contaminant during open-heart surgery. It contaminates water in heater-cooler units that then become aerosolized, contaminating the surgical field. We report a 56-year-old male who presented with culture-negative endocarditis six years after his initial open-heart surgery.
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21
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Blumer V, Parsons JB, Anderson DR, Bloomfield GS, Ward C. Hemophagocytic Lymphohistiocytosis Associated With Endocarditis: A Case Years in the Making. Circulation 2022; 145:934-939. [PMID: 35312382 DOI: 10.1161/circulationaha.121.057951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Vanessa Blumer
- Division of Cardiology, Department of Medicine (V.B., G.S.B., C.W.), Duke University Medical Center, Durham, NC.,Duke Clinical Research Institute, Durham, NC (V.B., G.S.B.)
| | - Joshua B Parsons
- Division of Infectious Diseases, Department of Medicine (J.B.P.), Duke University Medical Center, Durham, NC
| | - D Ryan Anderson
- Division of Rheumatology, Department of Medicine (D.R.A.), Duke University Medical Center, Durham, NC
| | - Gerald S Bloomfield
- Division of Cardiology, Department of Medicine (V.B., G.S.B., C.W.), Duke University Medical Center, Durham, NC.,Duke Clinical Research Institute, Durham, NC (V.B., G.S.B.)
| | - Cary Ward
- Division of Cardiology, Department of Medicine (V.B., G.S.B., C.W.), Duke University Medical Center, Durham, NC
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22
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Arshad V, Talha KM, Baddour LM. Epidemiology of infective endocarditis: novel aspects in the twenty-first century. Expert Rev Cardiovasc Ther 2022; 20:45-54. [PMID: 35081845 DOI: 10.1080/14779072.2022.2031980] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
INTRODUCTION The epidemiology of infective endocarditis (IE) in this millennium has changed with emergence of new risk factors and reemergence of others. This, coupled with modifications in national guidelines in the setting of a pandemic, prompted an address of the topic. AREAS COVERED Our goal is to provide a contemporary review of IE epidemiology considering changing incidence of rheumatic heart disease (RHD), cardiac device implantation, and injection drug use (IDU), with SARS-CoV-2 pandemic as the backdrop. METHODS PubMed and Google Scholar were used to identify studies of interest. EXPERT OPINION Our experience over the past two decades verifies the notion that there is not one 'textbook' profile of IE. Multiple factors have dramatically impacted IE epidemiology, and these factors differ, based, in part on geography. RHD has declined in many areas of the world, whereas implanted cardiovascular devices-related IE has grown exponentially. Perhaps the most influential, at least in areas of the United States, is injection drug use complicating the opioid epidemic. Healthy younger individuals contracting a potentially life-threatening infection has been tragic. In the past year, epidemiological changes due to the COVID-19 pandemic have also occurred. No doubt, changes will characterize IE in the future and serial review of the topic is warranted.
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Affiliation(s)
- Verda Arshad
- Division of Infectious Diseases, Department of Medicine, Mayo Clinic College of Medicine and Science, Rochester, Minnesota, USA
| | - Khawaja M Talha
- Division of Infectious Diseases, Department of Medicine, Mayo Clinic College of Medicine and Science, Rochester, Minnesota, USA
| | - Larry M Baddour
- Department of Cardiovascular Disease, Mayo Clinic School of Medicine and Science, Rochester, Minnesota, USA.,Division of Infectious Diseases, Department of Medicine, Mayo Clinic School of Medicine and Science, Rochester, Minnesota, USA
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23
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Condello I, Nasso G, Serraino GF, Mastroroberto P, Fiore F, Speziale G, Santarpino G. The evolution of temperature management for open heart surgery: an historical perspective. J Cardiothorac Vasc Anesth 2021; 36:3237-3243. [DOI: 10.1053/j.jvca.2021.12.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 11/21/2021] [Accepted: 12/17/2021] [Indexed: 11/11/2022]
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24
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Differences between Mycobacterium chimaera and tuberculosis Using Ocular Multimodal Imaging: A Systematic Review. J Clin Med 2021; 10:jcm10214880. [PMID: 34768406 PMCID: PMC8585020 DOI: 10.3390/jcm10214880] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 10/04/2021] [Accepted: 10/13/2021] [Indexed: 12/13/2022] Open
Abstract
Due to their non-specific diagnostic patterns of ocular infection, differential diagnosis between Mycobacterium (M.) chimaera and tuberculosis can be challenging. In both disorders, ocular manifestation can be the first sign of a systemic infection, and a delayed diagnosis might reduce the response to treatment leading to negative outcomes. Thus, it becomes imperative to distinguish chorioretinal lesions associated with M. chimaera, from lesions due to M. tuberculosis and other infectious disorders. To date, multimodal non-invasive imaging modalities that include ultra-wide field fundus photography, fluorescein and indocyanine green angiography, optical coherence tomography and optical coherence tomography angiography, facilitate in vivo examination of retinal and choroidal tissues, enabling early diagnosis, monitoring treatment response, and relapse detection. This approach is crucial to differentiate between active and inactive ocular disease, and guides clinicians in their decisional-tree during the patients’ follow-up. In this review, we summarized and compared the available literature on multimodal imaging data of M. chimaera infection and tuberculosis, emphasizing similarities and differences in imaging patterns between these two entities and highlighting the relevance of multimodal imaging in the management of the infections.
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25
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Lu D, Zhang CH, Chen LJ, Jin PF, Feng XF, Zhou X, Huang WC, Wang J, Dai Y, Fu Y. Case report of the first cured patient with Mycobacterium Chimaera infection following cardiac valve replacement in the mainland of China. Antimicrob Resist Infect Control 2021; 10:141. [PMID: 34620232 PMCID: PMC8499553 DOI: 10.1186/s13756-021-01003-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Accepted: 09/01/2021] [Indexed: 11/19/2022] Open
Abstract
Background Mycobacterium chimaera infections subsequent to cardiac surgery are related to contaminated heater-cooler devices, with high mortality. Nevertheless, few studies have been reported in Asia. Case presentation We described the case of a 55-year-old man with Mycobacterium chimaera infection following cardiac surgery in the mainland of China. He was diagnosed with endocarditis caused by Mycobacterium chimaera subsequent to open heart surgery. Metagenomic next-generation sequencing (mNGS) and 16S rRNA gene PCR analysis were used to identify potential pathogens. The patient underwent redo valve replacement surgery and received combination therapy with azithromycin, ethambutol, linezolid, and amikacin. No signs of relapse were observed during the 11-month follow-up visit. Conclusions This is the first documented case of Mycobacterium chimaera infection following cardiac surgery in the mainland of China and the first documented transnational imported case worldwide. Moreover, mNGS is a novel diagnostic technology that can guide antimicrobial therapy prior to obtaining fluid/tissue culture results for Mycobacterium chimaera, providing a new approach for the detection of potential Mycobacterium chimaera infection.
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Affiliation(s)
- Di Lu
- Department of Cardiac Surgery, First Affiliated Hospital, Wenzhou Medical University, Wenzhou, 325000, Zhejiang, People's Republic of China
| | - Chun-Hong Zhang
- Department of Pharmacy, First Affiliated Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, People's Republic of China
| | - Li-Jiang Chen
- Department of Clinical Laboratory, First Affiliated Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, People's Republic of China
| | - Pei-Feng Jin
- Department of Cardiac Surgery, First Affiliated Hospital, Wenzhou Medical University, Wenzhou, 325000, Zhejiang, People's Republic of China
| | - Xia-Fei Feng
- Cardiac Intensive Care Unit, First Affiliated Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, People's Republic of China
| | - Xi Zhou
- Cardiac Intensive Care Unit, First Affiliated Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, People's Republic of China
| | - Wei-Cong Huang
- Department of Cardiac Surgery, First Affiliated Hospital, Wenzhou Medical University, Wenzhou, 325000, Zhejiang, People's Republic of China
| | - Jue Wang
- Department of Cardiac Surgery, First Affiliated Hospital, Wenzhou Medical University, Wenzhou, 325000, Zhejiang, People's Republic of China
| | - Ying Dai
- Department of Pharmacy, First Affiliated Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, People's Republic of China
| | - Yun Fu
- Department of Cardiac Surgery, First Affiliated Hospital, Wenzhou Medical University, Wenzhou, 325000, Zhejiang, People's Republic of China.
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Zweifel SA, Wiest MRJ, Toro MD, Hasler P, Maloca P, Hasse B, Khanna N, Rejdak R. Long-Term Clinical and Multimodal Imaging Findings in Patients with Disseminated Mycobacterium Chimaera Infection. J Clin Med 2021; 10:jcm10184178. [PMID: 34575289 PMCID: PMC8464780 DOI: 10.3390/jcm10184178] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 09/10/2021] [Accepted: 09/13/2021] [Indexed: 11/16/2022] Open
Abstract
Background: To analyze long-term ophthalmic clinical and multimodal imaging findings of disseminated Mycobacterium (M.) chimaera infection after cardiothoracic surgery among the Swiss Cohort. Methods: Systemic and multimodal ophthalmic imaging and clinical findings including rate of recurrence were reviewed and correlated to a previously proposed classification system of choroidal lesions and classification of ocular disease. Main Outcomes Measures: long-term clinical and multimodal ocular imaging findings of M. chimaera. Results: Twelve patients suffering from systemic infection from M. chimaera were included. Mean age at the first ophthalmic examination was 59 years (range from 48 to 66 years). Mean duration of the follow-up was 22.63 ± 17.8 months. All patients presented with bilateral chorioretinal lesions at baseline; 5 patients had additional signs, including optic disc swelling (2), choroidal neovascularization (1), retinal neovascularization (1) and cilioretinal vascular occlusion (1). Four recurrence events after discontinuation or adjustment of the antibiotic treatment were observed. Progressive choroiditis was seen in 5 patients under treatment, 4 of them deceased. Conclusions: Expertise from ophthalmologists is not only relevant but also critical for the assessment of the adverse drug effect of antimycobacterial treatment along with monitoring therapeutic response and identifying recurrences.
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Affiliation(s)
- Sandrine Anne Zweifel
- Department of Ophthalmology, University Hospital Zurich, 8091 Zurich, Switzerland; (M.R.J.W.); (M.D.T.)
- Department of Ophthalmology, University of Zurich, 8091 Zurich, Switzerland
- Correspondence:
| | - Maximilian Robert Justus Wiest
- Department of Ophthalmology, University Hospital Zurich, 8091 Zurich, Switzerland; (M.R.J.W.); (M.D.T.)
- Department of Ophthalmology, University of Zurich, 8091 Zurich, Switzerland
| | - Mario Damiano Toro
- Department of Ophthalmology, University Hospital Zurich, 8091 Zurich, Switzerland; (M.R.J.W.); (M.D.T.)
- Department of Ophthalmology, University of Zurich, 8091 Zurich, Switzerland
- Department of General and Pediatric Ophthalmology, Medical University of Lublin, 20079 Lublin, Poland;
| | - Pascal Hasler
- Institute of Molecular and Clinical Ophthalmology Basel, 4023 Basel, Switzerland; (P.H.); (P.M.)
- Department of Ophthalmology, University Hospital Basel, 4023 Basel, Switzerland
| | - Peter Maloca
- Institute of Molecular and Clinical Ophthalmology Basel, 4023 Basel, Switzerland; (P.H.); (P.M.)
- Department of Ophthalmology, University Hospital Basel, 4023 Basel, Switzerland
| | - Barbara Hasse
- Division of Infectious Diseases and Hospital Epidemiology, University Hospital Zurich, 8091 Zurich, Switzerland;
| | - Nina Khanna
- Division of Infectious Diseases and Hospital Epidemiology, University Hospital Basel, 4023 Basel, Switzerland;
| | - Robert Rejdak
- Department of General and Pediatric Ophthalmology, Medical University of Lublin, 20079 Lublin, Poland;
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Kong X, Zhu X, Zhang Y, Wu J. The application of plan, do, check, act (PDCA) quality management in reducing nosocomial infections in endoscopy rooms: It does work. Int J Clin Pract 2021; 75:e14351. [PMID: 33973325 DOI: 10.1111/ijcp.14351] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Accepted: 05/07/2021] [Indexed: 01/22/2023] Open
Abstract
BACKGROUND The role of plan, do, check, act (PDCA) cycle quality management in reducing nosocomial infections in endoscopy rooms remains unclear; we aimed to evaluate the effects of PDCA in the nosocomial infections control of endoscopy rooms. METHODS This present study was a before and after design. The patients treated in our endoscopy room from 1 January 2019 to 31 December 2019 were included in the control group, which were managed according to current department practice. The patients from 1 January 2020 to 31 December 2020 were included in the PDCA group, which were managed according to PDCA cycle quality management including formulation of cleaning and disinfection process, establishment of an infection control team and improvement of inspection standards. The nosocomial infections of patients, the pass rate of medical staff's knowledge on the nosocomial infection and hand hygiene, the pass rate of disinfection of endoscope cavity and surface, the incidence of sharp injury and biological pollution were compared between two groups. RESULTS A total of 1020 patients were included, with 512 patients in PDCA group and 508 patients in the control group. The incidence of nosocomial infections in PDCA group was significantly lower than that of control group (0.98% vs. 2.76%, P = .002). The pass rate of medical staff's knowledge on the nosocomial infection and hand hygiene was significantly higher than that of control group (all P < .05). The pass rate of disinfection of endoscope cavity in PDCA group was significantly higher than that of control group (P = .037). The incidence of sharp injury and biological pollution in PDCA group were significantly lower than that of control group (all P < .05). CONCLUSIONS PDCA cycle management is beneficial to reduce the risk of nosocomial infection, enhance the awareness of infection control and reduce the risk of occupational exposure of medical staff in the endoscopy room.
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Affiliation(s)
- Xiaoming Kong
- Department of Infection Management, People's Hospital of Liyang, Changzhou, China
| | - Xiaolu Zhu
- Department of Infection Management, People's Hospital of Liyang, Changzhou, China
| | - Yidan Zhang
- Department of Infection Management, People's Hospital of Liyang, Changzhou, China
| | - Jie Wu
- Department of Infection Management, People's Hospital of Liyang, Changzhou, China
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Tan NY, Tarabochia AD, DeSimone DC, DeSimone CV, Wilson JW, Bagameri G, Bennett CE, Abu Saleh OM. Updated Experience of Mycobacterium chimaera Infection: Diagnosis and Management in a Tertiary Care Center. Open Forum Infect Dis 2021; 8:ofab348. [PMID: 34377729 PMCID: PMC8339283 DOI: 10.1093/ofid/ofab348] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Accepted: 06/29/2021] [Indexed: 02/04/2023] Open
Abstract
BACKGROUND Despite safety communications from the Food and Drug Administration (FDA) regarding the outbreak of Mycobacterium chimaera infections (MCIs) from contaminated heater-cooler devices, new cases continue to be identified. METHODS We retrospectively reviewed confirmed cases of MCI that were managed at Mayo Clinic sites (Arizona, Florida, and Minnesota) from 09/2015 to 01/2021. Clinical histories including prior cardiovascular surgery were recorded. Diagnostic workup including ophthalmologic examination, imaging, and laboratory testing was reviewed. Treatment and survival outcomes on follow-up were obtained. RESULTS Twelve patients with MCI were included. All patients had aortic valve or graft replacement. Five patients had their surgical procedures following the 10/15/2015 FDA safety communication. The mean time from surgery to symptom onset (range) was 32 (13-73) months. Ten of 11 patients who underwent ophthalmologic examination had chorioretinal abnormalities. Three patients who underwent microbial cell-free deoxyribonucleic acid sequencing tested positive for M. chimaera, which was subsequently confirmed with blood culture growth. Echocardiography and positron emission tomography/computed tomography (PET/CT) revealed evidence of prosthetic valve/graft infection in 7/12 (58.3%) and 6/10 (60.0%) of cases, respectively. Seven patients (58.3%) underwent redo cardiovascular surgery. Of these, 1 patient died 2 days postdischarge, 1 experienced spinal osteomyelitis relapse, and another had interval prosthetic valve fluorodeoxyglucose (FDG) uptake on PET/CT suspicious for recurrent infection. Among 4 patients on medical therapy only, 3 expired or transitioned to hospice during follow-up. CONCLUSIONS MCI continues to occur despite the FDA communications. Incorporation of ophthalmologic examination and use of advanced tools may improve MCI diagnosis. The mortality in these patients is high even with aggressive surgical/medical management.
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Affiliation(s)
- Nicholas Y Tan
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Alex D Tarabochia
- Division of Internal Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Daniel C DeSimone
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota, USA
- Department of Infectious Diseases, Mayo Clinic, Rochester, Minnesota, USA
| | | | - John W Wilson
- Department of Infectious Diseases, Mayo Clinic, Rochester, Minnesota, USA
| | - Gabor Bagameri
- Department of Cardiovascular Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Courtney E Bennett
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Omar M Abu Saleh
- Department of Infectious Diseases, Mayo Clinic, Rochester, Minnesota, USA
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29
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Bayer AS, Chambers HF. Prosthetic Valve Endocarditis Diagnosis and Management- New Paradigm Shift Narratives. Clin Infect Dis 2021; 72:1687-1692. [PMID: 33458755 DOI: 10.1093/cid/ciab036] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Indexed: 12/12/2022] Open
Abstract
Prosthetic valve endocarditis (PVE) is a major infectious disease problem due to the increasing numbers of patients undergoing valve replacement surgery. PVE can present diagnostic difficulties echocardiographically, especially when complicating transvascular placement techniques. Moreover, outbreaks of unusual PVE pathogens, such as Mycobacterium chimaera, have presented major diagnostic and therapeutic dilemmas.
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Affiliation(s)
- Arnold S Bayer
- The Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, California, USA.,The Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center, Torrance, California, USA
| | - Henry F Chambers
- The Department of Medicine, Division of HIV, Infectious Diseases and Global Medicine, Zuckerberg San Francisco General Hospital, University of California, San Francisco School of Medicine, San Francisco, California, USA
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30
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Natanti A, Palpacelli M, Valsecchi M, Tagliabracci A, Pesaresi M. Mycobacterium chimaera: a report of 2 new cases and literature review. Int J Legal Med 2021; 135:2667-2679. [PMID: 34185152 PMCID: PMC8523431 DOI: 10.1007/s00414-021-02630-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Accepted: 06/04/2021] [Indexed: 11/30/2022]
Abstract
Mycobacterium chimaera is a non-tuberculous mycobacterium, member of the Mycobacterium avium complex (MAC), which has become a global public health concern due to infection following cardiac surgery performed with contaminated heater-cooler units. M. chimaera infection is characterized by a long latency, non-specific signs and symptoms and high mortality rates. Thus, the diagnosis is still challenging both for forensic pathologists and for clinicians. Clinical manifestations of M. chimaera infection include endocarditis, hepatitis, nephritis, encephalitis and chorioretinitis. A constant histopathologic finding is the presence of non-caseating granulomas, with multinucleated giant cells and histiocytes. Hereby, we present two cases of fatal disseminated M. chimaera infection following aortic valve surgery reporting clinical history and post-mortem findings. Further, we provide a brief overview of the literature with a special focus on histopathological characteristics of M. chimaera infection. The aim of this article is to provide a complete synopsis of histopathological characteristics useful for forensic pathologists.
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Affiliation(s)
- Alice Natanti
- Section of Legal Medicine, Department of Excellence SBSP-Biomedical Sciences and Public Health, Università Politecnica delle Marche of Ancona, Conca 71, Street, Ancona, Italy
| | - Marco Palpacelli
- Section of Legal Medicine, Department of Excellence SBSP-Biomedical Sciences and Public Health, Università Politecnica delle Marche of Ancona, Conca 71, Street, Ancona, Italy
| | - Marco Valsecchi
- SOD of Legal Medicine, Azienda Ospedaliero Universitaria Ospedali Riuniti "Umberto I G M Lancisi G Salesi", Ancona, Italy
| | - Adriano Tagliabracci
- Section of Legal Medicine, Department of Excellence SBSP-Biomedical Sciences and Public Health, Università Politecnica delle Marche of Ancona, Conca 71, Street, Ancona, Italy
| | - Mauro Pesaresi
- Section of Legal Medicine, Department of Excellence SBSP-Biomedical Sciences and Public Health, Università Politecnica delle Marche of Ancona, Conca 71, Street, Ancona, Italy.
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Filkins LM, Bryson AL, Miller SA, Mitchell SL. Navigating Clinical Utilization of Direct-from-Specimen Metagenomic Pathogen Detection: Clinical Applications, Limitations, and Testing Recommendations. Clin Chem 2021; 66:1381-1395. [PMID: 33141913 DOI: 10.1093/clinchem/hvaa183] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 07/16/2020] [Indexed: 12/16/2022]
Abstract
BACKGROUND Metagenomic next generation sequencing (mNGS) is becoming increasingly available for pathogen detection directly from clinical specimens. These tests use target-independent, shotgun sequencing to detect potentially unlimited organisms. The promise of this methodology to aid infection diagnosis is demonstrated through early case reports and clinical studies. However, the optimal role of mNGS in clinical microbiology remains uncertain. CONTENT We reviewed studies reporting clinical use of mNGS for pathogen detection from various specimen types, including cerebrospinal fluid, plasma, lower respiratory specimens, and others. Published clinical study data were critically evaluated and summarized to identify promising clinical indications for mNGS-based testing, to assess the clinical impact of mNGS for each indication, and to recognize test limitations. Based on these clinical studies, early testing recommendations are made to guide clinical utilization of mNGS for pathogen detection. Finally, current barriers to routine clinical laboratory implementation of mNGS tests are highlighted. SUMMARY The promise of direct-from-specimen mNGS to enable challenging infection diagnoses has been demonstrated through early clinical studies of patients with meningitis or encephalitis, invasive fungal infections, community acquired pneumonia, and other clinical indications. However, the proportion of patient cases with positive clinical impact due to mNGS testing is low in published studies and the cost of testing is high, emphasizing the importance of improving our understanding of 'when to test' and for which patients mNGS testing is appropriate.
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Affiliation(s)
- Laura M Filkins
- Department of Pathology, University of Texas Southwestern Medical Center, Dallas, TX
| | - Alexandra L Bryson
- Department of Pathology, Virginia Commonwealth University Health System, Richmond, VA
| | - Steve A Miller
- Department of Laboratory Medicine, University of California, San Francisco, San Francisco, CA
| | - Stephanie L Mitchell
- Department of Pathology, University of Pittsburgh School of Medicine, Pittsburgh, PA
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Zoccola R, Di Blasio A, Bossotto T, Pontei A, Angelillo M, Dondo A, Goria M, Zoppi S. Validation of a Novel Diagnostic Approach Combining the VersaTREK™ System for Recovery and Real-Time PCR for the Identification of Mycobacterium chimaera in Water Samples. Microorganisms 2021; 9:microorganisms9051031. [PMID: 34064701 PMCID: PMC8150998 DOI: 10.3390/microorganisms9051031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 05/03/2021] [Accepted: 05/09/2021] [Indexed: 11/16/2022] Open
Abstract
Mycobacterium chimaera is an emerging pathogen associated with endocarditis and vasculitis following cardiac surgery. Although it can take up to 6-8 weeks to culture on selective solid media, culture-based detection remains the gold standard for diagnosis, so more rapid methods are urgently needed. For the present study, we processed environmental M. chimaera infected simulates at volumes defined in international guidelines. Each preparation underwent real-time PCR; inoculates were placed in a VersaTREK™ automated microbial detection system and onto selective Middlebrook 7H11 agar plates. The validation tests showed that real-time PCR detected DNA up to a concentration of 10 ng/µL. A comparison of the isolation tests showed that the PCR method detected DNA in a dilution of ×102 CFU/mL in the bacterial suspensions, whereas the limit of detection in the VersaTREK™ was <10 CFU/mL. Within less than 3 days, the VersaTREK™ detected an initial bacterial load of 100 CFU. The detection limit did not seem to be influenced by NaOH decontamination or the initial water sample volume; analytical sensitivity was 1.5 × 102 CFU/mL; positivity was determined in under 15 days. VersaTREK™ can expedite mycobacterial growth in a culture. When combined with PCR, it can increase the overall recovery of mycobacteria in environmental samples, making it potentially applicable for microbial control in the hospital setting and also in environments with low levels of contamination by viable mycobacteria.
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Affiliation(s)
- Roberto Zoccola
- Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d’Aosta, 10154 Torino, Italy; (R.Z.); (T.B.); (A.P.); (M.A.); (A.D.); (M.G.); (S.Z.)
| | - Alessia Di Blasio
- Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d’Aosta, 10154 Torino, Italy; (R.Z.); (T.B.); (A.P.); (M.A.); (A.D.); (M.G.); (S.Z.)
- Azienda Sanitaria Locale TO3 S.C. Sanità Animale, Pinerolo, 10064 Torino, Italy
- Correspondence: ; Tel.: +39-0121-235489
| | - Tiziana Bossotto
- Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d’Aosta, 10154 Torino, Italy; (R.Z.); (T.B.); (A.P.); (M.A.); (A.D.); (M.G.); (S.Z.)
| | - Angela Pontei
- Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d’Aosta, 10154 Torino, Italy; (R.Z.); (T.B.); (A.P.); (M.A.); (A.D.); (M.G.); (S.Z.)
| | - Maria Angelillo
- Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d’Aosta, 10154 Torino, Italy; (R.Z.); (T.B.); (A.P.); (M.A.); (A.D.); (M.G.); (S.Z.)
| | - Alessandro Dondo
- Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d’Aosta, 10154 Torino, Italy; (R.Z.); (T.B.); (A.P.); (M.A.); (A.D.); (M.G.); (S.Z.)
| | - Maria Goria
- Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d’Aosta, 10154 Torino, Italy; (R.Z.); (T.B.); (A.P.); (M.A.); (A.D.); (M.G.); (S.Z.)
| | - Simona Zoppi
- Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d’Aosta, 10154 Torino, Italy; (R.Z.); (T.B.); (A.P.); (M.A.); (A.D.); (M.G.); (S.Z.)
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Kaluza M, Färber G, May B, Dobermann U, Pletz MW, Edel B, Löffler B, Doenst T. Heater-Cooler Devices and Risk of Contamination during Cardiac Surgery. Thorac Cardiovasc Surg 2021; 69:703-709. [PMID: 33882611 DOI: 10.1055/s-0040-1721745] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
BACKGROUND Heater-cooler devices (HCD) have been implicated in a cardiosurgical contamination scenario causing prosthetic valve endocarditis. AIM We characterized contamination of new HCDs and assessed the risk of intraoperative microorganism transmission from the HCD to the operating field. METHODS We initially acquired four new FlexTherm and then four new Maquet HCU40 HCDs and assessed occurrence and speed of microbial contamination (including mycobacteria) assessing swab and water samples from the device. In parallel, we collected repeated samples from different sites in the operating room either by swab sticks or by exposing different sample plates to room air. We also reviewed microbiological results from the hospital and compared them to cardiosurgical wound infections and endocarditis cases. Finally, we simulated cardiosurgical conditions and assessed the devices' ability to expel air to the operative field. RESULTS All new HCDs were clean before first use. Despite authority-mandated decontamination procedures, microbial growth (Fusarium solani, Sphingomonas paucimobilis, Pseudomonas aeruginosa, Mycobacterium chelonae, and gordonae) was identified in all HCDs over time and could not be permanently eliminated. Four of these mircoorganisms were also found in tap water. However, none of the HCD-organisms were found inside the laminar airflow operating area. Importantly, except for P. aeruginosa, none of the HCD organisms were found in patients with surgical wound infections or endocarditis. HCD-expelled air did not rise more than 40 cm above ground. CONCLUSION HCDs cannot be expected to remain sterile despite extensive decontamination procedures. However, airborne transmission of microorganisms directly from the HCD to the operating field appears unlikely.
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Affiliation(s)
- Mirko Kaluza
- Department of Cardiothoracic Surgery, Jena University Hospital, Friedrich-Schiller University of Jena, Jena, Germany.,Life Systems Medizintechnik Service GmbH, Mönchengladbach, Germany
| | - Gloria Färber
- Department of Cardiothoracic Surgery, Jena University Hospital, Friedrich-Schiller University of Jena, Jena, Germany
| | - Benjamin May
- Department of Cardiothoracic Surgery, Jena University Hospital, Friedrich-Schiller University of Jena, Jena, Germany
| | - Ute Dobermann
- Center for Infectious Diseases and Infection Control, Jena University Hospital, Friedrich-Schiller University of Jena, Jena, Germany
| | - Mathias W Pletz
- Center for Infectious Diseases and Infection Control, Jena University Hospital, Friedrich-Schiller University of Jena, Jena, Germany
| | - Birgit Edel
- Institute of Medical Microbiology, Jena University Hospital, Friedrich-Schiller University of Jena, Jena, Germany
| | - Bettina Löffler
- Institute of Medical Microbiology, Jena University Hospital, Friedrich-Schiller University of Jena, Jena, Germany
| | - Torsten Doenst
- Department of Cardiothoracic Surgery, Jena University Hospital, Friedrich-Schiller University of Jena, Jena, Germany
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Adding Another Piece to the Puzzle of Why NTM Infections Are Relatively Uncommon despite Their Ubiquitous Nature. mBio 2021; 12:mBio.03577-20. [PMID: 33879587 PMCID: PMC8092311 DOI: 10.1128/mbio.03577-20] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Since nontuberculous mycobacteria (NTM) are pervasive in the environment and NTM infections are relatively uncommon, underlying hereditary or acquired host susceptibility factors should be sought for in most NTM-infected patients. To facilitate identification of underlying risk factors, it is useful to classify NTM disease into skin-soft tissue infections, isolated NTM lung disease, and extrapulmonary viscera-disseminated disease because the latter two categories have unique sets of underlying host risk factors. Since nontuberculous mycobacteria (NTM) are pervasive in the environment and NTM infections are relatively uncommon, underlying hereditary or acquired host susceptibility factors should be sought for in most NTM-infected patients. To facilitate identification of underlying risk factors, it is useful to classify NTM disease into skin-soft tissue infections, isolated NTM lung disease, and extrapulmonary visceral/disseminated disease because the latter two categories have unique sets of underlying host risk factors. Nakajima and coworkers (M. Nakajima, M. Matsuyama, M. Kawaguchi, T. Kiwamoto, et al., mBio 12:e01947-20, 2021, https://doi.org/10.1128/mBio.01947-20) in a recent issue of mBio found that Nrf2 (nuclear factor erythroid 2-related factor 2), a transcription factor that is induced by oxidative stress but induces antioxidant molecules, provides protection against an NTM infection in a murine model. While they showed that Nrf2 induction of Nramp-1 enhanced phagosome-lysosome fusion, we discuss other potential mechanisms by which oxidative stress predisposes to and Nrf2 protects against NTM infections.
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Drug susceptibility distributions of Mycobacterium chimaera and other non-tuberculous mycobacteria. Antimicrob Agents Chemother 2021; 65:AAC.02131-20. [PMID: 33619057 PMCID: PMC8092894 DOI: 10.1128/aac.02131-20] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Recent outbreaks of cardiac surgery-associated Mycobacterium chimaera infections have highlighted the importance of species differentiation within the Mycobacterium avium complex and pointed to a lack of antibiotic susceptibility data for M. chimaera Using the MGIT 960/EpiCenter TB eXiST platform, we have determined antibiotic susceptibility patterns of 48 clinical M. chimaera isolates and 139 other non-tuberculous mycobacteria including 119 members of the M. avium complex and 20 Mycobacterium kansasii towards clofazimine and other drugs used to treat infections with slowly growing nontuberculous mycobacteria (NTM). MIC50, MIC90 and tentative epidemiological cutoff (ECOFF) values for clofazimine were 0.5 mg/L, 1 mg/L and 2 mg/L for M. chimaera. Comparable values were observed for other M. avium complex members, lower MIC50 (≤0.25 mg/L), MIC90 (0.5 mg/L) and ECOFF (1 mg/L) values were found for M. kansasii Susceptibility to clarithromycin, ethambutol, rifampin, rifabutin, amikacin, moxifloxacin and linezolid was in general similar for M. chimaera and other members of the M. avium complex but increased for M. kansasii The herein determined MIC distributions, MIC90 and ECOFF values of clofazimine for M. chimaera and other NTM provide the basis for the definition of clinical breakpoints. Further studies are needed to establish correlation of in vitro susceptibility and clinical outcome.
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Lecorche E, Daniau C, La K, Mougari F, Benmansour H, Kumanski S, Robert J, Fournier S, Lebreton G, Carbonne A, Cambau E. Mycobacterium chimaera Genomics With Regard to Epidemiological and Clinical Investigations Conducted for an Open Chest Postsurgical Mycobacterium chimaera Infection Outbreak. Open Forum Infect Dis 2021; 8:ofab192. [PMID: 34189167 PMCID: PMC8231370 DOI: 10.1093/ofid/ofab192] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 04/14/2021] [Indexed: 11/21/2022] Open
Abstract
Background Postsurgical infections due to Mycobacterium chimaera appeared as a novel nosocomial threat in 2015, with a worldwide outbreak due to contaminated heater-cooler units used in open chest surgery. We report the results of investigations conducted in France including whole-genome sequencing comparison of patient and heater-cooler unit isolates. Methods We sought M. chimaera infection cases from 2010 onwards through national epidemiological investigations in health care facilities performing cardiopulmonary bypass, together with a survey on good practices and systematic heater-cooler unit microbial analyses. Clinical and heater-cooler unit isolates were subjected to whole-genome sequencing analyzed with regard to the reference outbreak strain Zuerich-1. Results Only 2 clinical cases were shown to be related to the outbreak, although 23% (41/175) of heater-cooler units were declared positive for M. avium complex. Specific measures to prevent infection were applied in 89% (50/56) of health care facilities, although only 14% (8/56) of them followed the manufacturer maintenance recommendations. Whole-genome sequencing comparison showed that the clinical isolates and 72% (26/36) of heater-cooler unit isolates belonged to the epidemic cluster. Within clinical isolates, 5–9 nonsynonymous single nucleotide polymorphisms were observed, among which an in vivo mutation in a putative efflux pump gene was observed in a clinical isolate obtained for 1 patient on antimicrobial treatment. Conclusions Cases of postsurgical M. chimaera infections have been declared to be rare in France, although heater-cooler units were contaminated, as in other countries. Genomic analyses confirmed the connection to the outbreak and identified specific single nucleotide polymorphisms, including 1 suggesting fitness evolution in vivo.
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Affiliation(s)
- Emmanuel Lecorche
- Université de Paris, INSERM, IAME, Paris, France.,APHP-GHU Nord, Service de Mycobactériologie Spécialisée et de Référence, Paris, France.,Centre National de Référence des Mycobactéries et de la Résistance des Mycobactéries aux Antituberculeux (CNR-MyRMA), Paris, France
| | - Côme Daniau
- Santé Publique France, Saint-Maurice, France
| | - Kevin La
- Université de Paris, INSERM, IAME, Paris, France.,Centre National de Référence des Mycobactéries et de la Résistance des Mycobactéries aux Antituberculeux (CNR-MyRMA), Paris, France
| | - Faiza Mougari
- APHP-GHU Nord, Service de Mycobactériologie Spécialisée et de Référence, Paris, France.,Centre National de Référence des Mycobactéries et de la Résistance des Mycobactéries aux Antituberculeux (CNR-MyRMA), Paris, France
| | - Hanaa Benmansour
- APHP-GHU Nord, Service de Mycobactériologie Spécialisée et de Référence, Paris, France.,Centre National de Référence des Mycobactéries et de la Résistance des Mycobactéries aux Antituberculeux (CNR-MyRMA), Paris, France
| | - Sylvain Kumanski
- Centre National de Référence des Mycobactéries et de la Résistance des Mycobactéries aux Antituberculeux (CNR-MyRMA), Paris, France
| | - Jérôme Robert
- Centre National de Référence des Mycobactéries et de la Résistance des Mycobactéries aux Antituberculeux (CNR-MyRMA), Paris, France.,Centre d'Immunologie et des Maladies Infectieuses-CIMI-Paris, Sorbonne-Université, INSERM, Paris, France.,Bactériologie-Hygiène, AP-HP, Sorbonne Université, Site Pitié, Paris, France
| | - Sandra Fournier
- Centre d'Immunologie et des Maladies Infectieuses, Sorbonne - Université, INSERM (U1135 - E2), Paris, France
| | - Guillaume Lebreton
- Service de Chirurgie Cardiaque et Thoracique, Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France
| | | | - Emmanuelle Cambau
- Université de Paris, INSERM, IAME, Paris, France.,APHP-GHU Nord, Service de Mycobactériologie Spécialisée et de Référence, Paris, France.,Centre National de Référence des Mycobactéries et de la Résistance des Mycobactéries aux Antituberculeux (CNR-MyRMA), Paris, France
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Wojcik BM, Mitchell JD, Chong T, Rove JY. Management of refractory Mycobacterium abscessus sternal infection following reoperative cardiac surgery. Clin Case Rep 2021; 9:2328-2331. [PMID: 33936688 PMCID: PMC8077348 DOI: 10.1002/ccr3.4027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 01/15/2021] [Accepted: 02/22/2021] [Indexed: 01/21/2023] Open
Abstract
Mycobacterium abscessus surgical site infections are rare, but notoriously difficult to treat. Eradication requires aggressive surgical resection, removal of foreign material, prolonged antibiotics, and consideration of delayed reconstruction.
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Affiliation(s)
- Brandon M. Wojcik
- Division of Cardiothoracic SurgeryDepartment of SurgeryUniversity of ColoradoAuroraCOUSA
| | - John D. Mitchell
- Division of Cardiothoracic SurgeryDepartment of SurgeryUniversity of ColoradoAuroraCOUSA
| | - Tae Chong
- Division of Plastic SurgeryDepartment of SurgeryUniversity of ColoradoAuroraCOUSA
| | - Jessica Y. Rove
- Division of Cardiothoracic SurgeryDepartment of SurgeryUniversity of ColoradoAuroraCOUSA
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Ma J, Ruzicki JL, Carrell NW, Baker CF. Ocular manifestations of disseminated Mycobacterium chimaera infection after cardiothoracic surgery. Can J Ophthalmol 2021; 57:90-97. [PMID: 33775595 DOI: 10.1016/j.jcjo.2021.02.032] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 02/16/2021] [Accepted: 02/18/2021] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To describe the ocular manifestations of disseminated Mycobacterium chimaera infection after cardiothoracic surgery. DESIGN Retrospective, observational case series. PARTICIPANTS Patients with disseminated M. chimaera infection treated at the University of Alberta Hospital and Royal Alexandra Hospital in Edmonton, Alberta, Canada. METHODS Seven patients (14 eyes) with systemic M. chimaera infection after aortic graft and/or valvular surgeries were reviewed for ocular involvement. Cases were identified based on histopathologic analysis of cardiac tissue, repeat positive mycobacterial blood cultures, and cerebrospinal fluid analysis. Clinical ocular findings, fundus autofluorescence, fluorescein angiography, spectral-domain optical coherence tomography (SD-OCT), and autopsy results are described. RESULTS The mean age of our patients was 63 years (range, 22-76 years). Aortic graft and/or valvular surgeries were performed between June 2015 and April 2016. The mean duration from surgery to diagnosis of infection was 27 months (range, 19-36 months). All patients exhibited white-yellowish choroidal lesions. Bilateral, multifocal choroiditis was observed in 6 patients (12 eyes), who died of disseminated M. chimaera infection despite aggressive, multiagent antimicrobial therapy. One patient had a solitary, white-yellow choroidal lesion in the left eye only. Choroidal lesions were hyperfluorescent on late-phase fluorescein angiography and corresponded to localized choroidal thickening and retinal elevation on SD-OCT. CONCLUSIONS M. chimaera infection after cardiothoracic surgery can cause life-threatening disease involving multiple organ systems. Ocular involvement is an important and possibly early clinical finding, with good correlation to systemic disease severity. Ophthalmological assessment and multimodal imaging may aid in early diagnosis and can be used to monitor disease progression.
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Affiliation(s)
- Jingyi Ma
- Faculty of Medicine & Dentistry, University of Alberta, Edmonton, Alta
| | - Jessica L Ruzicki
- Department of Ophthalmology and Visual Sciences, University of Alberta, Edmonton, Alta
| | - Nathan W Carrell
- Department of Ophthalmology and Visual Sciences, University of Alberta, Edmonton, Alta
| | - Chad F Baker
- Department of Ophthalmology and Visual Sciences, University of Alberta, Edmonton, Alta..
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Deaner JD, Lowder CY, Pichi F, Gordon S, Shrestha N, Emami-Naeini P, Sharma S, Srivastava SK. Clinical and Multimodal Imaging Findings in Disseminated Mycobacterium Chimaera. ACTA ACUST UNITED AC 2021; 5:184-194. [DOI: 10.1016/j.oret.2020.06.030] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 05/22/2020] [Accepted: 06/25/2020] [Indexed: 10/23/2022]
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40
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Damavandi DS, Javan M, Moshashaei H, Forootan M, Darvishi M. Microbial Contamination after Cardiac Surgery in a Hospital Cardiac Surgery Ward. J Med Life 2020; 13:342-348. [PMID: 33072206 PMCID: PMC7550159 DOI: 10.25122/jml-2019-0071] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Surgery site infection is one of the most common postoperative complications which is associated with increased morbidity, mortality and admission costs. It is considered a priority to determine the level of nosocomial infection and its control in reflecting the quality of care. Therefore, this study aimed to evaluate the microbial contamination after cardiac surgery at a hospital cardiac surgery ward of Besat Hospital, Tehran. In this cross-sectional descriptive-analytic study (2013-2017), 610 patients underwent surgery at the Department of Cardiac Surgery of Besat Hospital. All necessary information such as urine culture, surgical site, histopathologic examination for the diagnosis of microbial contamination and microorganisms were collected from the patient records and inserted in the questionnaire. The data were analyzed using SPSS (version 25). The incidence of nosocomial infections following cardiac surgery reportedly ranged from 17% to 23%. Accordingly, pneumonia (51.2%) and local infections (22%) were the most common infections in the studied population. The mortality rate in our population was 11.4%. Moreover, 64.3% of the total mortality cases were reported in patients with sepsis. The mean age and duration of admission of patients with catheter infection were significantly higher than other subjects. Given the relatively high prevalence of the infection and its importance, it is necessary to take more serious measures to prevent and control these infections.
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Affiliation(s)
| | - Mina Javan
- Faculty of Medicine, Tehran Medical Sciences Branch, Islamic Azad University, Tehran, Iran
| | - Hamidreza Moshashaei
- Faculty of Medicine, Tehran Medical Sciences Branch, Islamic Azad University, Tehran, Iran
| | - Mojgan Forootan
- Department of Gastroenterology, Gastrointestinal and Liver Diseases Research Center (RCGLD),Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Darvishi
- Infectious Diseases and Tropical Medicine Research Center (IDTMRC), Department of Aerospace and Subaquatic Medicine,AJA University of Medical Sciences, Tehran, Iran
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Successful termination of an outbreak of Mycobacterium chimaera infections associated with contaminated heater-cooler devices. Infect Control Hosp Epidemiol 2020; 42:471-473. [PMID: 33019949 DOI: 10.1017/ice.2020.468] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The global outbreak of invasive Mycobacterium chimaera infections associated with heater-cooler devices (HCDs) presented several important and unique challenges. To mitigate the risk of infection, we removed the HCDs from operating rooms (ORs) at our hospital and since that time (4.5 years ago) we have had no new cases.
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Quintás Viqueira A, Pérez Romero C, Toro Rueda C, Sánchez Calles A, Blázquez González J, Alejandre Leyva M. Mycobacterium chimaera in heater-cooler devices: an experience in a tertiary hospital in Spain. New Microbes New Infect 2020; 39:100757. [PMID: 33437492 PMCID: PMC7786110 DOI: 10.1016/j.nmni.2020.100757] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 09/04/2020] [Indexed: 11/26/2022] Open
Abstract
The aim of the study was to describe the Mycobacterium chimaera contamination in heater–cooler devices after the application of a protocol of cleaning and disinfection in a tertiary hospital. It was an observational study at the La Paz-Cantoblanco-Carlos III University Hospital, Madrid, Spain. Seven heater–cooler devices are used in our hospital: five 3T Sorin (LivaNova) and two Maquet. We followed the manufacturers' instructions for cleaning and disinfection of the different heater–cooler devices. Environmental testing was developed monthly from January 2017 to July 2019. Samples were obtained from both cardioplegia and patient circuits and before and after the disinfection process and were cultured in appropriate media for non-tuberculous mycobacteria and heterotrophic bacteria (coliforms and Pseudomonas aeruginosa). A total of 320 samples were taken. Mycobacterium chimaera grew in four water samples (1.25%) from three different heater–cooler devices, with two positive results occurring after disinfection. The heterotrophic bacteria Delftia acidovorans and Stenotrophomonas maltophilia were also found. There has not been a case of M. chimaera infection in patients after cardiac surgery in our hospital. In March 2019, we decided to move the heater–cooler device outside the operating room. Mycobacterium chimaera contamination is not always eradicated by disinfection processes. We believe that placing 3T heater–cooler devices outside the operating room is the best option in preventing M. chimaera infection during cardiac surgery.
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Affiliation(s)
- A. Quintás Viqueira
- Department of Preventive Medicine, La Paz-Cantoblanco-Carlos III University Hospital, Madrid, Spain
- Corresponding author: A. Quintás Viqueira, Department of Preventive Medicine, La Paz-Cantoblanco-Carlos III University Hospital, Madrid, Spain.
| | - C. Pérez Romero
- National School of Public Health, Institute of Health Carlos III, Madrid, Spain
| | - C. Toro Rueda
- Department of Microbiology, La Paz-Cantoblanco-Carlos III University Hospital, Madrid, Spain
| | - A.M. Sánchez Calles
- Department of Preventive Medicine, La Paz-Cantoblanco-Carlos III University Hospital, Madrid, Spain
| | - J.A. Blázquez González
- Department of Cardiac Surgery, La Paz-Cantoblanco-Carlos III University Hospital, Madrid, Spain
| | - M. Alejandre Leyva
- Extracorporeal Circulation Unit, La Paz-Cantoblanco-Carlos III University Hospital, Madrid, Spain
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Vendramin I, Peghin M, Tascini C, Livi U. Longest incubation period of Mycobacterium chimaera infection after cardiac surgery. Eur J Cardiothorac Surg 2020; 59:ezaa292. [PMID: 32864705 DOI: 10.1093/ejcts/ezaa292] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 07/07/2020] [Accepted: 07/12/2020] [Indexed: 11/12/2022] Open
Abstract
Mycobacterium chimaera infections have been associated with contamination of a heater-cooler unit used during cardiopulmonary bypass procedures since 2006. Mycobacterium chimaera is a slow-growing non-tuberculous mycobacterium responsible for an infection, which is difficult to treat and has often a devastating course. Until now, M. chimaera infection has been shown to occur up to 8 years after operation. We report a patient presenting with an aortic pseudoaneurysm who developed M. chimaera infection 12 years after repair of an acute type A aortic dissection with graft replacement of the ascending aorta and stent-grafting of the arch. As far as we know, this is the case with the longest incubation period of M. chimaera infection. The present experience indicates that all patients who underwent open heart procedures since 2006 with such heater-cooler unit model should be closely followed up regardless of time of index surgery.
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Affiliation(s)
- Igor Vendramin
- Cardiothoracic Department, University Hospital, Udine, Italy
| | - Maddalena Peghin
- Division of Infectious Diseases, Department of Medicine, University Hospital, Udine, Italy
| | - Carlo Tascini
- Division of Infectious Diseases, Department of Medicine, University Hospital, Udine, Italy
| | - Ugolino Livi
- Cardiothoracic Department, University Hospital, Udine, Italy
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Cain CJ, Ahmad H, Molina EJ. Mediastinal tissue friability-An unreported complication from Mycobacterium chimaera infection post-cardiac surgery. J Card Surg 2020; 35:3191-3194. [PMID: 32740995 DOI: 10.1111/jocs.14928] [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: 07/07/2020] [Revised: 07/22/2020] [Accepted: 07/25/2020] [Indexed: 11/28/2022]
Abstract
Mycobacterium chimaera can cause disseminated infection following cardiac surgery with cardiopulmonary bypass and contaminated heater-cooler devices. We discuss a 41-year-old man with a disseminated M. chimaera infection following surgery for a type A aortic dissection. His presentation included cachexia and dorsalgia with a work-up revealing vertebral osteomyelitis with an epidural abscess, bone marrow, and pulmonary infiltration, and fluid collection around his aortic graft. He received 1 month of antibiotics before the explantation of infected foreign material, mediastinal debridement, and aortic reconstruction. Complications included septic shock, respiratory and renal failure, mediastinitis, and four distal aortic anastomotic dehiscences from friable tissue and persistent infection.
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Affiliation(s)
- Caitlin J Cain
- Georgetown University School of Medicine, Washington, District of Columbia
| | - Huzaifa Ahmad
- Division of Internal Medicine, MedStar Washington Hospital Center, Washington, District of Columbia
| | - Ezequiel J Molina
- Georgetown University School of Medicine, Washington, District of Columbia.,Division of Cardiac Surgery, MedStar Heart and Vascular Institute, Washington, District of Columbia
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Lecorche E, Pean de Ponfilly G, Mougari F, Benmansour H, Poisnel E, Janvier F, Cambau E. Disseminated Mycobacterium chimaera Following Open-Heart Surgery, the Heater-Cooler Unit Worldwide Outbreak: Case Report and Minireview. Front Med (Lausanne) 2020; 7:243. [PMID: 32613002 PMCID: PMC7308416 DOI: 10.3389/fmed.2020.00243] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Accepted: 05/07/2020] [Indexed: 12/17/2022] Open
Abstract
Invasive cardiovascular infections by Mycobacterium chimaera associated with open-heart surgery have been reported worldwide since 2013. Here, we report a case of a 61 year old man, without any other particular medical background, who underwent cardiac surgery for replacing part of the ascending aorta by a bio-prosthetic graft. Eighteen months later, the patient was painful at the lower back with fever. A pyogenic vertebral osteomyelitis due to M. chimaera associated to graft infection was diagnosed after 6 months of sub-acute infection. The patient presented a disseminated disease with cerebral lesions, chorioretinitis, and chronic renal failure. Despite adequate antimicrobial treatment and graft explantation, the patient died after 6 years. We reviewed the literature on M. chimaera infections associated with open-heart surgery. The worldwide outbreak has been explained by airborne bioaerosol generated by the 3T heater–cooler unit (HCU) used during cardiac by-pass surgical procedures. These infections are difficult to diagnose because of a long latency period (up to several years), with no specific symptoms and a highly specialized microbiological diagnosis. The treatment is based on antibiotics and surgery. These infections are also difficult to treat, since the mortality rate is high around 50%. Prevention is necessary by modifying the use of HCUs in operating rooms.
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Affiliation(s)
- Emmanuel Lecorche
- Université de Paris, IAME, INSERM, UMR1137, UFR de Médecine, Paris, France.,CNR-MyRMA, Centre National de Reference pour les Mycobactéries et les Antituberculeux, APHP, Paris, France.,APHP, Hôpital Lariboisière, Service de Microbiologie, Paris, France
| | | | - Faiza Mougari
- Université de Paris, IAME, INSERM, UMR1137, UFR de Médecine, Paris, France.,CNR-MyRMA, Centre National de Reference pour les Mycobactéries et les Antituberculeux, APHP, Paris, France.,APHP, Hôpital Lariboisière, Service de Microbiologie, Paris, France
| | - Hanaa Benmansour
- Université de Paris, IAME, INSERM, UMR1137, UFR de Médecine, Paris, France.,CNR-MyRMA, Centre National de Reference pour les Mycobactéries et les Antituberculeux, APHP, Paris, France.,APHP, Hôpital Lariboisière, Service de Microbiologie, Paris, France
| | - Elodie Poisnel
- Service de Medecine Interne, Hôpital d'Instruction des Armées Sainte Anne, Toulon, France
| | - Frederic Janvier
- Service de microbiologie, Hôpital d'Instruction des Armées Sainte Anne, Toulon, France.,Ecole du Val-de-Grâce, Paris, France
| | - Emmanuelle Cambau
- Université de Paris, IAME, INSERM, UMR1137, UFR de Médecine, Paris, France.,CNR-MyRMA, Centre National de Reference pour les Mycobactéries et les Antituberculeux, APHP, Paris, France.,APHP, Hôpital Lariboisière, Service de Microbiologie, Paris, France
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Non-tuberculous mycobacterial infections-A neglected and emerging problem. Int J Infect Dis 2020; 92S:S46-S50. [PMID: 32114200 DOI: 10.1016/j.ijid.2020.02.022] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 02/12/2020] [Accepted: 02/12/2020] [Indexed: 11/22/2022] Open
Abstract
Non-tuberculous mycobacteria (NTM) are ubiquitous dwellers of environmental niches and are an established cause of natural and nosocomial infections. The incidence of NTM infections is rising owing to a growing population of immunocompromised and vulnerable individuals, complex medical and surgical procedures, as well as increased awareness and diagnostic capabilities. The prevalence of different NTM varies between continents, regions, and countries. The true global burden of pulmonary and extrapulmonary disease is unknown and estimates are subject to under and/or over-estimation. Diagnosis requires confirmation by isolation of NTM along with clinical and radiological criteria, which may be suboptimal at all levels. Susceptibility testing is complex and clinical breakpoints are not available for many of the drugs. Frequently, NTM infections are not considered until late in the course of disease. Improved and rapid detection of tuberculosis cases in high-burden countries has, however, also brought NTM infections into the limelight, and has identified a need for research efforts towards rapid diagnostic tests and the identification of biomarkers to monitor the treatment response in patients with NTM infections.
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