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Hassanzadeh A, Hasannezhad M, Abbasian L, Ghaderkhani S, Ameli F, Allahdadi M. Disseminated mycobacterium genavense infection with central nervous system involvement in an HIV patient: a case report and literature review. BMC Infect Dis 2024; 24:437. [PMID: 38658840 PMCID: PMC11041032 DOI: 10.1186/s12879-024-09316-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Accepted: 04/11/2024] [Indexed: 04/26/2024] Open
Abstract
BACKGROUND Immunodeficient patients, particularly HIV patients, are at risk of opportunistic infections. Nontuberculous mycobacteria can cause severe complications in immunodeficient patients. CASE PRESENTATION We describe a 57-year-old HIV patient, primarily presented with coughs and constitutional symptoms, with a unique Mycobacterium genavense abdominal, pulmonary, and central nervous system infection, accompanied by intracranial masses. CONCLUSION The diagnosis of NTM, including M. genavense, must always be considered by clinicians in immunodeficient patients, especially those with HIV, who have a compromised immune system.
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Affiliation(s)
- Ali Hassanzadeh
- Department of Infectious Diseases and Tropical Medicine, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, End of Keshavarz Boulevard, 1419733141, Tehran, Iran
| | - Malihe Hasannezhad
- Department of Infectious Diseases and Tropical Medicine, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, End of Keshavarz Boulevard, 1419733141, Tehran, Iran.
- Iranian Research Center for HIV/AIDS, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran.
| | - Ladan Abbasian
- Department of Infectious Diseases and Tropical Medicine, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, End of Keshavarz Boulevard, 1419733141, Tehran, Iran
- Iranian Research Center for HIV/AIDS, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran
| | - Sara Ghaderkhani
- Department of Infectious Diseases and Tropical Medicine, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, End of Keshavarz Boulevard, 1419733141, Tehran, Iran
- Iranian Research Center for HIV/AIDS, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran
| | - Fereshteh Ameli
- Department of Pathology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Mehdi Allahdadi
- Department of Infectious Diseases and Tropical Medicine, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, End of Keshavarz Boulevard, 1419733141, Tehran, Iran
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Ghimire A, Mahendradhata Y, Paudel S, Lama Yonzon C, K. C. B, Sharma S, Utarini A. Implementation fidelity of tuberculosis preventive therapy for under five children exposed to sputum smear positive pulmonary tuberculosis in Kaski district, Nepal: An implementation research. PLoS One 2022; 17:e0263967. [PMID: 35171959 PMCID: PMC8849459 DOI: 10.1371/journal.pone.0263967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Accepted: 02/01/2022] [Indexed: 11/19/2022] Open
Abstract
Introduction In line with the WHO recommendation, Nepal has started implementing Tuberculosis prevention therapy (TBPT) for under five children exposed to Sputum Smear Positive Pulmonary Tuberculosis, as one of the strategies for prevention, care and control of TB. Implementation fidelity study is important to assess on what extent preventive program is being implemented. The objective of the study measured the implementation fidelity of TBPT program Kaski district, Nepal. Methods We used a mixed-method explanatory sequential design study. Quantitative data were collected through retrospective review of records from April 2018 to May 2019 and level of adherence was established. Moderating factors influencing the implementation of TBPT were TBPT were assessed qualitatively. Sixteen in-depth interviews and a focus group discussion was conducted purposively with responsible stakeholders. The study was guided by the Conceptual Framework for Implementation Fidelity (CFIR) developed by Carroll. Results The majority of the components of the TBPT program were found to be implemented with a moderate level of fidelity. The proportion of under five years children initiate and complete the full course of TBPT was 72.5% and 75.86% respectively. The proportion of index cases traced for household contact, contact tracing within two months and timely initiation of therapy within two months were 54.19%, 82.73% and 86.20%. Moderating factors identified in the implementation of the program were contact tracing and enrollment, partnership and ownership, training resources, medication, awareness and information dissemination. Conclusion The TBPT program is being moderately implemented in Kaski districts. Addressing the key challenges identified in contact tracing, partnership/ownership, incentives, training and knowledge of health workers results in more identification of children eligible for TBPT.
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Affiliation(s)
- Ashmita Ghimire
- International Master Program in Public Health, Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Yogyakarta, Indonesia
- * E-mail:
| | - Yodi Mahendradhata
- Department of Health Policy and Management, Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Yogyakarta, Indonesia
| | - Sagun Paudel
- International Master Program in Public Health, Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Yogyakarta, Indonesia
| | - Chhoden Lama Yonzon
- International Master Program in Public Health, Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Yogyakarta, Indonesia
| | - Bhuvan K. C.
- School of Pharmacy, Monash University Malaysia, Selangor, Malaysia
| | - Sushmita Sharma
- Province Health Logistic Management Centre, Gandaki Province, Pokhara, Nepal
| | - Adi Utarini
- Department of Health Policy and Management, Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Yogyakarta, Indonesia
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Mishra P, Sharma RK, Yadav R, Rao VG, Nigam S, Lingala MA, Bhat J. Reasons for loss to follow-up (LTFU) of pulmonary TB (PTB) patients: A qualitative study among Saharia, a particularly vulnerable tribal group of Madhya Pradesh, India. PLoS One 2021; 16:e0261152. [PMID: 34941885 PMCID: PMC8699669 DOI: 10.1371/journal.pone.0261152] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Accepted: 11/27/2021] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Loss to follow-up (LTFU) among pulmonary tuberculosis (PTB) patients is a significant challenge for TB control. However, there is a dearth of information about the factors leading to LTFU among marginalized communities. This study highlights the factors associated with LTFU in Saharia, a tribe of Madhya Pradesh having high tuberculosis (TB) prevalence. METHODS A qualitative study was carried out during January-April 2020 among twenty-two pulmonary TB patients, recorded as LTFU in NIKSHAY, with ten treatment supporters and ten patient's family members. Semi-structured personal interview tools were used to collect the information on the history of anti-tuberculosis treatment, adverse drug events (ADE), social cognitive, behaviors, myths, and misbeliefs. The interviews were transcribed and thematically analysed to examine underlying themes. RESULTS The study explored various social, behavioral factors leading to loss to follow-up among PTB patients. Drug side effects, alcoholism, social stigma, lack of awareness of the seriousness of the diseases and poor counseling are the main barriers to treatment adherence in this community. CONCLUSIONS The study highlights the need to address the issues related to LTFU during TB treatment. The enhanced efforts of treatment supporters, health staff, and family & community persons must motivate and support the patients.
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Affiliation(s)
- Prashant Mishra
- ICMR-National Institute of Research in Tribal Health (NIRTH), Jabalpur, India
| | | | - Rajiv Yadav
- ICMR-National Institute of Research in Tribal Health (NIRTH), Jabalpur, India
| | - V. G. Rao
- ICMR-National Institute of Research in Tribal Health (NIRTH), Jabalpur, India
| | - Samridhi Nigam
- ICMR-National Institute of Research in Tribal Health (NIRTH), Jabalpur, India
| | | | - Jyothi Bhat
- ICMR-National Institute of Research in Tribal Health (NIRTH), Jabalpur, India
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Zhou AX, Scriba TJ, Day CL, Hagge DA, Seshadri C. A simple assay to quantify mycobacterial lipid antigen-specific T cell receptors in human tissues and blood. PLoS Negl Trop Dis 2021; 15:e0010018. [PMID: 34914694 PMCID: PMC8717985 DOI: 10.1371/journal.pntd.0010018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 12/30/2021] [Accepted: 11/23/2021] [Indexed: 11/19/2022] Open
Abstract
T cell receptors (TCRs) encode the history of antigenic challenge within an individual and have the potential to serve as molecular markers of infection. In addition to peptide antigens bound to highly polymorphic MHC molecules, T cells have also evolved to recognize bacterial lipids when bound to non-polymorphic CD1 molecules. One such subset, germline-encoded, mycolyl lipid-reactive (GEM) T cells, recognizes mycobacterial cell wall lipids and expresses a conserved TCR-ɑ chain that is shared among genetically unrelated individuals. We developed a quantitative PCR assay to determine expression of the GEM TCR-ɑ nucleotide sequence in human tissues and blood. This assay was validated on plasmids and T cell lines. We tested blood samples from South African subjects with or without tuberculin reactivity or with active tuberculosis disease. We were able to detect GEM TCR-ɑ above the limit of detection in 92% of donors but found no difference in GEM TCR-ɑ expression among the three groups after normalizing for total TCR-ɑ expression. In a cohort of leprosy patients from Nepal, we successfully detected GEM TCR-ɑ in 100% of skin biopsies with histologically confirmed tuberculoid and lepromatous leprosy. Thus, GEM T cells constitute part of the T cell repertoire in the skin. However, GEM TCR-ɑ expression was not different between leprosy patients and control subjects after normalization. Further, these results reveal the feasibility of developing a simple, field deployable molecular diagnostic based on mycobacterial lipid antigen-specific TCR sequences that are readily detectable in human tissues and blood independent of genetic background.
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MESH Headings
- Antigens, CD1/genetics
- Antigens, CD1/immunology
- Cell Wall/genetics
- Cell Wall/immunology
- Cohort Studies
- Humans
- Leprosy/blood
- Leprosy/diagnosis
- Leprosy/immunology
- Leprosy/microbiology
- Lipids/immunology
- Molecular Diagnostic Techniques/methods
- Mycobacterium/genetics
- Mycobacterium/immunology
- Mycobacterium/isolation & purification
- Nepal
- Polymerase Chain Reaction
- Receptors, Antigen, T-Cell, alpha-beta/blood
- Receptors, Antigen, T-Cell, alpha-beta/genetics
- Receptors, Antigen, T-Cell, alpha-beta/immunology
- South Africa
- T-Lymphocytes/immunology
- T-Lymphocytes/microbiology
- Tuberculosis/blood
- Tuberculosis/diagnosis
- Tuberculosis/immunology
- Tuberculosis/microbiology
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Affiliation(s)
- Angela X. Zhou
- Department of Medicine, University of Washington, Seattle, Washington, United States of America
- Tuberculosis Research and Training Center, University of Washington, Seattle, Washington, United States of America
| | - Thomas J. Scriba
- South African Tuberculosis Vaccine Initiative, Institute of Infectious Disease and Molecular Medicine and Division of Immunology, Department of Pathology, University of Cape Town, Cape Town, South Africa
| | - Cheryl L. Day
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia, United States of America
| | - Deanna A. Hagge
- Mycobacterial Research Laboratories, Anandaban Hospital, Kathmandu, Nepal
| | - Chetan Seshadri
- Department of Medicine, University of Washington, Seattle, Washington, United States of America
- Tuberculosis Research and Training Center, University of Washington, Seattle, Washington, United States of America
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Gwitira I, Karumazondo N, Shekede MD, Sandy C, Siziba N, Chirenda J. Spatial patterns of pulmonary tuberculosis (TB) cases in Zimbabwe from 2015 to 2018. PLoS One 2021; 16:e0249523. [PMID: 33831058 PMCID: PMC8031317 DOI: 10.1371/journal.pone.0249523] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Accepted: 03/21/2021] [Indexed: 12/19/2022] Open
Abstract
INTRODUCTION Accurate mapping of spatial heterogeneity in tuberculosis (TB) cases is critical for achieving high impact control as well as guide resource allocation in most developing countries. The main aim of this study was to explore the spatial patterns of TB occurrence at district level in Zimbabwe from 2015 to 2018 using GIS and spatial statistics as a preamble to identifying areas with elevated risk for prioritisation of control and intervention measures. METHODS In this study Getis-Ord Gi* statistics together with SaTscan were used to characterise TB hotspots and clusters in Zimbabwe at district level from 2015 to 2018. GIS software was used to map and visualise the results of cluster analysis. RESULTS Results show that TB occurrence exhibits spatial heterogeneity across the country. The TB hotspots were detected in the central, western and southern part of the country. These areas are characterised by artisanal mining activities as well as high poverty levels. CONCLUSIONS AND RECOMMENDATIONS Results of this study are useful to guide TB control programs and design effective strategies which are important in achieving the United Nations Sustainable Development goals (UNSDGs).
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Affiliation(s)
- Isaiah Gwitira
- Department of Geography Geospatial Sciences and Earth Observation, Faculty of Science, University of Zimbabwe, Harare, Zimbabwe
| | - Norbert Karumazondo
- Department of Geography Geospatial Sciences and Earth Observation, Faculty of Science, University of Zimbabwe, Harare, Zimbabwe
| | - Munyaradzi Davis Shekede
- Department of Geography Geospatial Sciences and Earth Observation, Faculty of Science, University of Zimbabwe, Harare, Zimbabwe
| | - Charles Sandy
- National TB Control Program, Ministry of Health and Child Care, Harare, Zimbabwe
| | - Nicolas Siziba
- National TB Control Program, Ministry of Health and Child Care, Harare, Zimbabwe
| | - Joconiah Chirenda
- Department of Community Medicine, Faculty of Medicine and Health Sciences, Parirenyatwa Hospital, University of Zimbabwe, Harare, Zimbabwe
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Ameke S, Asare P, Aboagye SY, Otchere ID, Osei-Wusu S, Yeboah-Manu D, Asante-Poku A. Molecular epidemiology of Mycobacterium tuberculosis complex in the Volta Region of Ghana. PLoS One 2021; 16:e0238898. [PMID: 33730036 PMCID: PMC7968653 DOI: 10.1371/journal.pone.0238898] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Accepted: 02/27/2021] [Indexed: 11/18/2022] Open
Abstract
CONTEXT Available molecular epidemiological data from recent studies suggest significant genetic variation between the different lineages of Mycobacterium tuberculosis complex (MTBC) and the MTBC lineages might have adapted to different human populations. AIM This study sought to determine the population structure of clinical MTBC isolates from the Volta Region of Ghana. METHODS The MTBC isolates obtained from collected sputum samples were identified by PCR detecting of IS6110 and genotyped using spoligotyping. Non-tuberculous mycobacterial isolates were characterized by amplification of the heat shock protein 65 (hsp65) gene and sequencing. The drug susceptibility profiles of the MTBCs determined using GenoType MTBDRplus. RESULTS One hundred and seventeen (117, 93.6%) out of 125 mycobacterial positive isolates were characterized as members of the MTBC of which M. tuberculosis sensu stricto (MTBss) and M. africanum (MAF) were respectively 94 (80.3%) and 23 (19.7%). In all, 39 distinct spoligotype patterns were obtained; 26 for MTBss and 13 for MAF lineages. Spoligotyping identified 89 (76%) Lineage 4, 16 (13.6%) Lineage 5, 7 (6.0%) Lineage 6, 3 (2.6%) Lineage 2, 1(0.9%) Lineage 3 and 1 (0.9%) Lineage 1. Among the Lineage 4 isolates, 62/89 (69.7%) belonged to Cameroon sub-lineage, 13 (14.7%) Ghana, 8 (9.0%) Haarlem, 2 (2.2%) LAM, 1 (1.1%) Uganda I, 1 (1.1%) X and the remaining two (2.2%) were orphan. Significant localization of MAF was found within the Ho municipality (n = 13, 29.5%) compared to the more cosmopolitan Ketu-South/Aflao (n = 3, 8.3%) (p-value = 0.017). Eight (8) non-tuberculous mycobacteria were characterized as M. abscessus (7) and M. fortuitum (1). CONCLUSION We confirmed the importance of M. africanum lineages as a cause of TB in the Volta region of Ghana.
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Affiliation(s)
- Selassie Ameke
- Bacteriology Department, Noguchi Memorial Institute for Medical Research (NMIMR), University of Ghana, Accra, Ghana
- West African Centre for Cell Biology of Infectious Pathogens (WACCBIP), University of Ghana, Accra, Ghana
| | - Prince Asare
- Bacteriology Department, Noguchi Memorial Institute for Medical Research (NMIMR), University of Ghana, Accra, Ghana
| | - Samuel Yaw Aboagye
- Bacteriology Department, Noguchi Memorial Institute for Medical Research (NMIMR), University of Ghana, Accra, Ghana
| | - Isaac Darko Otchere
- Bacteriology Department, Noguchi Memorial Institute for Medical Research (NMIMR), University of Ghana, Accra, Ghana
| | - Stephen Osei-Wusu
- Bacteriology Department, Noguchi Memorial Institute for Medical Research (NMIMR), University of Ghana, Accra, Ghana
| | - Dorothy Yeboah-Manu
- Bacteriology Department, Noguchi Memorial Institute for Medical Research (NMIMR), University of Ghana, Accra, Ghana
- West African Centre for Cell Biology of Infectious Pathogens (WACCBIP), University of Ghana, Accra, Ghana
| | - Adwoa Asante-Poku
- Bacteriology Department, Noguchi Memorial Institute for Medical Research (NMIMR), University of Ghana, Accra, Ghana
- West African Centre for Cell Biology of Infectious Pathogens (WACCBIP), University of Ghana, Accra, Ghana
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Suzuki T, Saitou M, Igarashi Y, Mitarai S, Niitsuma K. Isolation of Mycobacterium talmoniae from a patient with diffuse panbronchiolitis: a case report. BMC Infect Dis 2021; 21:251. [PMID: 33691626 PMCID: PMC7945688 DOI: 10.1186/s12879-021-05944-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Accepted: 03/01/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Mycobacterium (M) talmoniae isolated from a patient with cystic fibrosis was first described in 2017, and cases of M. talmoniae remain exceedingly rare. CASE PRESENTATION A 51-year-old woman had respiratory symptoms for 10 years. Diffuse panbronchiolitis (DPB) was detected at the first visit at our hospital. A cavity lesion in the apex of the left lung was found, and sputum and bronchoalveolar lavage fluid were acid-fast bacillus (AFB) smear- and culture-positive besides Pseudomonas aeruginosa. M. talmoniae was finally identified, and the standard combination therapy for non-tuberculous mycobacteria (NTM) was administered for 2 y referring to the drug-susceptibility test. Thereafter, the AFB culture was negative, the wall thickness of the lung cavity was ameliorated, and oxygen saturation improved. CONCLUSIONS We encountered a rare case of M. talmoniae with DPB, for which standard combination therapy was effective. M. talmoniae may be considered a potential pathogen of lung disease, especially in patients with bronchiectatic lesions.
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Affiliation(s)
- Tomoko Suzuki
- Department of Infectious Disease and Pulmonary Medicine, Aizu Medical Center, Fukushima Medical University, 21-2 Maeda, Tanisawa, Kawahigashimachi, Aizuwakamatsu, Fukushima, 969-3492, Japan.
| | - Miwako Saitou
- Department of Infectious Disease and Pulmonary Medicine, Aizu Medical Center, Fukushima Medical University, 21-2 Maeda, Tanisawa, Kawahigashimachi, Aizuwakamatsu, Fukushima, 969-3492, Japan
| | - Yuriko Igarashi
- Department of Mycobacterium Reference and Research, The Research Institute of Tuberculosis, Japan Anti-tuberculosis Association, Tokyo, Japan
| | - Satoshi Mitarai
- Department of Mycobacterium Reference and Research, The Research Institute of Tuberculosis, Japan Anti-tuberculosis Association, Tokyo, Japan
| | - Katsunao Niitsuma
- Department of Infectious Disease and Pulmonary Medicine, Aizu Medical Center, Fukushima Medical University, 21-2 Maeda, Tanisawa, Kawahigashimachi, Aizuwakamatsu, Fukushima, 969-3492, Japan
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Akabane K, Uchida T, Matsuo S, Hirooka S, Kim C, Uchino H, Shimanuki T. Hybrid operation for infectious thoracic and abdominal aortic aneurysms complicated with Bacillus Calmette-Guérin therapy for bladder cancer: A case report. Medicine (Baltimore) 2021; 100:e24796. [PMID: 33607839 PMCID: PMC7899839 DOI: 10.1097/md.0000000000024796] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Accepted: 01/29/2021] [Indexed: 01/05/2023] Open
Abstract
RATIONAL Bacillus Calmette-Guérin (BCG) intravesical instillation therapy is a widely used treatment for bladder cancer; however, an infectious aneurysm has been reported as a rare complication. PATIENT CONCERNS A 76-year-old man who underwent BCG intravesical instillation therapy for bladder cancer presented with prolonged dull back pain for 3 months. DIAGNOSIS Computed tomography (CT) revealed both thoracic and abdominal aortic aneurysms (AAAs). Follow-up CT at 4 weeks after the initial examination showed rapid enlargement of both aneurysms and typical findings of inflammation. Therefore, he was diagnosed with an impending rupture of infectious aneurysms. INTERVENTIONS Although open surgical resection of both aneurysms and vascular reconstruction were ideal, these operations were considered highly invasive for the patient. Therefore, a hybrid operation consisting of simultaneous endovascular repair of the thoracic aneurysm and open surgery of the abdominal lesion was performed. OUTCOMES BCG "Tokyo-172" strain was identified in the resected sample from the aneurysmal wall, and he continued to receive oral antituberculosis drugs for 6 months. No sign of recurrent infection was observed 1 year after the operation. LESSONS A hybrid operation might be justified as an alternative to the conventional open surgical procedure, especially for patients with infectious aneurysms caused by weak pathogenic bacteria such as, the BCG mycobacteria.
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MESH Headings
- Administration, Intravesical
- Aged
- Aneurysm, Infected/etiology
- Aneurysm, Infected/microbiology
- Aortic Aneurysm, Abdominal/diagnostic imaging
- Aortic Aneurysm, Abdominal/microbiology
- Aortic Aneurysm, Abdominal/surgery
- Aortic Aneurysm, Thoracic/diagnostic imaging
- Aortic Aneurysm, Thoracic/microbiology
- Aortic Aneurysm, Thoracic/surgery
- BCG Vaccine/administration & dosage
- BCG Vaccine/adverse effects
- Humans
- Male
- Mycobacterium/isolation & purification
- Tomography, X-Ray Computed
- Urinary Bladder Neoplasms/drug therapy
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Affiliation(s)
- Kentaro Akabane
- Division of Cardiovascular Surgery, Nihonkai General Hospital, Sakata
| | - Tetsuro Uchida
- Second Department of Surgery, Yamagata University Faculty of Medicine, Yamagata, Japan
| | - Somei Matsuo
- Division of Cardiovascular Surgery, Nihonkai General Hospital, Sakata
| | - Shuto Hirooka
- Division of Cardiovascular Surgery, Nihonkai General Hospital, Sakata
| | - Cholus Kim
- Division of Cardiovascular Surgery, Nihonkai General Hospital, Sakata
| | - Hideaki Uchino
- Division of Cardiovascular Surgery, Nihonkai General Hospital, Sakata
| | - Takao Shimanuki
- Division of Cardiovascular Surgery, Nihonkai General Hospital, Sakata
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Wallace E, Hendrickson D, Tolli N, Mehaffy C, Peña M, Nick JA, Knabenbaur P, Watkins J, Simpson A, Amin AG, Chatterjee D, Dobos KM, Lahiri R, Adams L, Strong M, Salfinger M, Bradford R, Stedman TT, Riojas MA, Hazbón MH. Culturing Mycobacteria. Methods Mol Biol 2021; 2314:1-58. [PMID: 34235647 DOI: 10.1007/978-1-0716-1460-0_1] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
Building upon the foundational research of Robert Koch, who demonstrated the ability to grow Mycobacterium tuberculosis for the first time in 1882 using media made of coagulated bovine serum, microbiologists have continued to develop new and more efficient ways to grow mycobacteria. Presently, all known mycobacterial species can be grown in the laboratory using either axenic culture techniques or in vivo passage in laboratory animals. This chapter provides conventional protocols to grow mycobacteria for diagnostic purposes directly from clinical specimens, as well as in research laboratories for scientific purposes. Detailed protocols used for production of M. tuberculosis in large scale (under normoxic and hypoxic conditions) in bioreactors and for production of obligate intracellular pathogens such as Mycobacterium leprae and "Mycobacterium lepromatosis" using athymic nude mice and armadillos are provided.
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Affiliation(s)
| | | | | | - Carolina Mehaffy
- Mycobacteria Research Laboratories, Department of Microbiology, Immunology & Pathology, Colorado State University, Fort Collins, CO, USA
| | - María Peña
- United States Department of Health and Human Services, Health Resources and Services Administration, Healthcare Systems Bureau, National Hansen's Disease Program, Baton Rouge, LA, USA
| | - Jerry A Nick
- Department of Medicine, National Jewish Health, Denver, CO, USA
| | - Phillip Knabenbaur
- Mycobacteria Research Laboratories, Department of Microbiology, Immunology & Pathology, Colorado State University, Fort Collins, CO, USA
| | - Jackson Watkins
- Mycobacteria Research Laboratories, Department of Microbiology, Immunology & Pathology, Colorado State University, Fort Collins, CO, USA
| | - Anne Simpson
- Mycobacteria Research Laboratories, Department of Microbiology, Immunology & Pathology, Colorado State University, Fort Collins, CO, USA
| | - Anita G Amin
- Mycobacteria Research Laboratories, Department of Microbiology, Immunology & Pathology, Colorado State University, Fort Collins, CO, USA
| | - Delphi Chatterjee
- Mycobacteria Research Laboratories, Department of Microbiology, Immunology & Pathology, Colorado State University, Fort Collins, CO, USA
| | - Karen M Dobos
- Mycobacteria Research Laboratories, Department of Microbiology, Immunology & Pathology, Colorado State University, Fort Collins, CO, USA
| | - Ramanuj Lahiri
- United States Department of Health and Human Services, Health Resources and Services Administration, Healthcare Systems Bureau, National Hansen's Disease Program, Baton Rouge, LA, USA
| | - Linda Adams
- United States Department of Health and Human Services, Health Resources and Services Administration, Healthcare Systems Bureau, National Hansen's Disease Program, Baton Rouge, LA, USA
| | - Michael Strong
- Department of Medicine, National Jewish Health, Denver, CO, USA
| | - Max Salfinger
- College of Public Health & Morsani College of Medicine, University of South Florida, Tampa, FL, USA
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Hendrix J, Epperson LE, Durbin D, Honda JR, Strong M. Intraspecies plasmid and genomic variation of Mycobacterium kubicae revealed by the complete genome sequences of two clinical isolates. Microb Genom 2021; 7:mgen000497. [PMID: 33355531 PMCID: PMC8115904 DOI: 10.1099/mgen.0.000497] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 12/02/2020] [Indexed: 01/13/2023] Open
Abstract
Mycobacterium kubicae is 1 of nearly 200 species of nontuberculous mycobacteria (NTM), environmental micro-organisms that in some situations can infect humans and cause severe lung, skin and soft tissue infections. Although numerous studies have investigated the genetic variation among prevalent clinical NTM species, including Mycobacterium abscessus and Mycobacterium avium, many of the less common but clinically relevant NTM species, including M. kubicae, still lack complete genomes to serve as a comparative reference. Well-characterized representative genomes for each NTM species are important both for investigating the pathogenic potential of NTM, as well as for use in diagnostic methods, even for species that less frequently cause human disease. Here, we report the complete genomes of two M. kubicae strains, isolated from two unrelated patients. Hybrid short-read and long-read sequencing and assembly, using sequence reads from Illumina and Oxford Nanopore Technologies platforms, were utilized to resolve the chromosome and plasmid sequences of each isolate. The genome of NJH_MKUB1 had 5135 coding sequences (CDSs), a circular chromosome of length 5.3 Mb and two plasmids. The genome of NJH_MKUB2 had 5957 CDSs, a circular chromosome of 6.0 Mb and five plasmids. We compared our completed genomic assemblies to four recently released draft genomes of M. kubicae in order to better understand intraspecies genomic conservation and variability. We also identified genes implicated in drug resistance, virulence and persistence in the M. kubicae chromosome and plasmids. Virulence factors encoded in the genome and in the plasmids of M. kubicae provide a foundation for investigating how opportunistic environmental NTM may cause disease.
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Affiliation(s)
- Jo Hendrix
- Computational Bioscience, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
- Center for Genes, Environment and Health, National Jewish Health, Denver, CO, USA
| | - L. Elaine Epperson
- Center for Genes, Environment and Health, National Jewish Health, Denver, CO, USA
| | - David Durbin
- Advanced Diagnostics Laboratories, National Jewish Health, Denver, CO, USA
| | - Jennifer R. Honda
- Center for Genes, Environment and Health, National Jewish Health, Denver, CO, USA
| | - Michael Strong
- Computational Bioscience, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
- Center for Genes, Environment and Health, National Jewish Health, Denver, CO, USA
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11
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Ghielmetti G, Rosato G, Trovato A, Friedel U, Kirchgaessner C, Perroulaz C, Pendl W, Schulthess B, Bloemberg GV, Keller PM, Stephan R, Tortoli E. Mycobacterium helveticum sp. nov., a novel slowly growing mycobacterial species associated with granulomatous lesions in adult swine. Int J Syst Evol Microbiol 2020; 71. [PMID: 33355527 PMCID: PMC7968739 DOI: 10.1099/ijsem.0.004615] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
The occurrence of nontuberculous mycobacteria in different hosts and their implication as obligate or opportunistic pathogens remain mainly unclear. Mycobacteriosis in pigs is usually associated with members of the Mycobacterium avium complex and, in particular, with ‘Mycobacterium avium subsp. hominissuis’. Here we describe a novel slow-growing mycobacterial species isolated from lymph nodes obtained from two sows housed in different Swiss farms. The animals presented chronic inappetence and mild diarrhoea. Gross pathology revealed focal caseous lymphadenopathy of the mesenteric lymph nodes. Complete genome sequencing of the two isolates from the two sows was performed. The genomes comprised 5.76 Mb and an average nucleotide identity score of 99.97 %. Whole genome sequence, mycolic acid and matrix-assisted laser desorption ionization-time of flight mass spectrometry analyses revealed that the two isolates were not related to any previously described Mycobacterium species. The closest related species was Mycobacterium parmense, a slow-growing scotochromogenic mycobacterium first isolated from a cervical lymph node of a 3-year-old child. The name proposed for the new species is Mycobacterium helveticum sp. nov. and 16-83T (=DSM 109965T= LMG 2019-02457T) is the type strain.
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Affiliation(s)
- Giovanni Ghielmetti
- Institute for Food Safety and Hygiene, Section of Veterinary Bacteriology, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
- *Correspondence: Giovanni Ghielmetti,
| | - Giuliana Rosato
- Institute of Veterinary Pathology, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | - Alberto Trovato
- Emerging Bacterial Pathogens Unit, IRCCS San Raffaele Scientific Institute, Milano, Italy
| | - Ute Friedel
- Institute for Food Safety and Hygiene, Section of Veterinary Bacteriology, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | - Constanze Kirchgaessner
- Institute for Food Safety and Hygiene, Section of Veterinary Bacteriology, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | - Carmen Perroulaz
- Institute for Infectious Diseases, University of Bern, Bern, Switzerland
| | - Wolfgang Pendl
- Department for Farm Animals, Division of Swine Medicine, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | - Bettina Schulthess
- Institute of Medical Microbiology, University of Zurich, Zurich, Switzerland
| | - Guido V. Bloemberg
- Institute for Food Safety and Hygiene, Swiss National Centre for Enteropathogenic Bacteria and Listeria, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | - Peter M. Keller
- Institute for Infectious Diseases, University of Bern, Bern, Switzerland
| | - Roger Stephan
- Institute for Food Safety and Hygiene, Section of Veterinary Bacteriology, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | - Enrico Tortoli
- Emerging Bacterial Pathogens Unit, IRCCS San Raffaele Scientific Institute, Milano, Italy
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12
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Shan SD, Bozso SJ, Akioyamen L, MacArthur R. Mycobacterium chimaera After Aortic Valve Replacement Causing Aortic Rupture and Prosthetic Valve Endocarditis. Ann Thorac Surg 2020; 111:e335-e337. [PMID: 32987021 DOI: 10.1016/j.athoracsur.2020.02.082] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2019] [Revised: 12/15/2019] [Accepted: 02/06/2020] [Indexed: 11/20/2022]
Abstract
A 20-year-old man with severe aortic insufficiency received a mechanical aortic valve replacement. Afterward he subsequently presented with an aortic root dissection, pseudoaneurysm, and prosthetic valve endocarditis requiring surgical reinterventions twice with a positive Mycobacterium chimaera tissue culture despite prolonged antimycobacterial therapy. This is the first reported clinical case of M chimaera in Western Canada and the first with M chimaera-associated aortic dissection and pseudoaneurysm.
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Affiliation(s)
- Shubham David Shan
- Division of Cardiac Surgery, Mazankowski Alberta Heart Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Sabin Joseph Bozso
- Division of Cardiac Surgery, Mazankowski Alberta Heart Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Leo Akioyamen
- Department of Medicine, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Roderick MacArthur
- Division of Cardiac Surgery, Mazankowski Alberta Heart Institute, University of Alberta, Edmonton, Alberta, Canada.
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13
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Butler TE, Lee AJ, Yang Y, Newton MD, Kargupta R, Puttaswamy S, Sengupta S. Direct-from-sputum rapid phenotypic drug susceptibility test for mycobacteria. PLoS One 2020; 15:e0238298. [PMID: 32857802 PMCID: PMC7454970 DOI: 10.1371/journal.pone.0238298] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Accepted: 08/13/2020] [Indexed: 12/18/2022] Open
Abstract
Background The spread of multi-drug resistant tuberculosis (MDR-TB) is a leading global public-health challenge. Because not all biological mechanisms of resistance are known, culture-based (phenotypic) drug-susceptibility testing (DST) provides important information that influences clinical decision-making. Current phenotypic tests typically require pre-culture to ensure bacterial loads are at a testable level (taking 2–4 weeks) followed by 10–14 days to confirm growth or lack thereof. Methods and findings We present a 2-step method to obtain DST results within 3 days of sample collection. The first involves selectively concentrating live mycobacterial cells present in relatively large volumes of sputum (~2-10mL) using commercially available magnetic-nanoparticles (MNPs) into smaller volumes, thereby bypassing the need for pre-culture. The second involves using microchannel Electrical Impedance Spectroscopy (m-EIS) to monitor multiple aliquots of small volumes (~10μL) of suspension containing mycobacterial cells, MNPs, and candidate-drugs to determine whether cells grow, die, or remain static under the conditions tested. m-EIS yields an estimate for the solution “bulk capacitance” (Cb), a parameter that is proportional to the number of live bacteria in suspension. We are thus able to detect cell death (bactericidal action of the drug) in addition to cell-growth. We demonstrate proof-of-principle using M. bovis BCG and M. smegmatis suspended in artificial sputum. Loads of ~ 2000–10,000 CFU of mycobacteria were extracted from ~5mL of artificial sputum during the decontamination process with efficiencies of 84% -100%. Subsequently, suspensions containing ~105 CFU/mL of mycobacteria with 10 mg/mL of MNPs were monitored in the presence of bacteriostatic and bactericidal drugs at concentrations below, at, and above known MIC (Minimum Inhibitory Concentration) values. m-EIS data (ΔCb) showed data consistent with growth, death or stasis as expected and/or recorded using plate counts. Electrical signals of death were visible as early as 3 hours, and growth was seen in < 3 days for all samples, allowing us to perform DST in < 3 days. Conclusion We demonstrated “proof of principle” that (a) live mycobacteria can be isolated from sputum using MNPs with high efficiency (almost all the bacteria that survive decontamination) and (b) that the efficacy of candidate drugs on the mycobacteria thus isolated (in suspensions containing MNPs) could be tested in real-time using m-EIS.
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Affiliation(s)
- Timothy E. Butler
- Department of Biomedical, Biological and Chemical Engineering, University of Missouri, Columbia, Missouri, United States of America
| | - Aiden J. Lee
- Department of Biomedical, Biological and Chemical Engineering, University of Missouri, Columbia, Missouri, United States of America
| | - Yongqiang Yang
- Department of Biomedical, Biological and Chemical Engineering, University of Missouri, Columbia, Missouri, United States of America
| | | | - Roli Kargupta
- Department of Biomedical, Biological and Chemical Engineering, University of Missouri, Columbia, Missouri, United States of America
| | - Sachidevi Puttaswamy
- Department of Biomedical, Biological and Chemical Engineering, University of Missouri, Columbia, Missouri, United States of America
| | - Shramik Sengupta
- Department of Biomedical, Biological and Chemical Engineering, University of Missouri, Columbia, Missouri, United States of America
- * E-mail:
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14
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Brown AE, Ibraheim MK, Petersen E, Swaby MG, Pinney SS. An evolving presentation of cutaneous tuberculosis. Dermatol Online J 2020; 26:13030/qt55d3f43c. [PMID: 32941718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 09/15/2020] [Indexed: 06/11/2023] Open
Abstract
Tuberculosis is a fairly common disease in the United States and around the world, newly infecting ten million people throughout the world per year. Despite the pervasiveness of tuberculosis, cutaneous tuberculosis (CTB) rarely manifests worldwide. Tuberculous infections of the skin arise in several distinct variants that can be classified as either multibacillary or paucibacillary; each subtype within these categories presents with its own morphological and histological findings. The diagnosis of CTB can prove clinically challenging as its variants mimic many conditions dermatologist encounter on a daily basis. Additionally, tissue confirmation is difficult. We report a case of CTB which evolved from a lupus vulgaris presentation to the metastatic tuberculous abscess variant.
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Affiliation(s)
| | | | | | - Michael G Swaby
- Department of Pathology, University of Texas Health Science Center at Houston, Houston, TX
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15
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Sharma K, Sharma M, Modi M, Joshi H, Goyal M, Sharma A, Ray P, Rowlinson MC. Mycobacterium chimaera and chronic meningitis. QJM 2020; 113:563-564. [PMID: 31999345 DOI: 10.1093/qjmed/hcaa010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2019] [Revised: 01/02/2020] [Indexed: 11/13/2022] Open
Affiliation(s)
- K Sharma
- Department of Medical Microbiology, Postgraduate Institute of Medical Education and Research, Sector 12, Chandigarh 160012, India
| | - M Sharma
- Department of Medical Microbiology, Postgraduate Institute of Medical Education and Research, Sector 12, Chandigarh 160012, India
| | - M Modi
- Department of Neurology, Postgraduate Institute of Medical Education and Research, Sector 12, Chandigarh 160012, India
| | - H Joshi
- Department of Medical Microbiology, Postgraduate Institute of Medical Education and Research, Sector 12, Chandigarh 160012, India
| | - M Goyal
- Department of Neurology, Postgraduate Institute of Medical Education and Research, Sector 12, Chandigarh 160012, India
| | - A Sharma
- Department of Internal Medicine, Postgraduate Institute of Medical Education and Research, Sector 12, Chandigarh 160012, India
| | - P Ray
- Department of Medical Microbiology, Postgraduate Institute of Medical Education and Research, Sector 12, Chandigarh 160012, India
| | - M C Rowlinson
- Division of Infectious Diseases and Global Medicine, Bureau of Public Health Laboratories, Jacksonville, FL 32202, USA
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16
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Affiliation(s)
- Jean-Francois Jabbour
- Division of Infectious Diseases, Department of Internal Medicine, American University of Beirut Medical Center, Beirut, Lebanon
| | - Amal Hamieh
- Division of Infectious Diseases, Department of Internal Medicine, Al Rassoul Al Azam Hospital, Beirut, Lebanon
| | - Sima L. Sharara
- Division of Infectious Diseases, Department of Medicine, Johns Hopkins School of Medicine, Baltimore, Maryland
| | - Souha S. Kanj
- Division of Infectious Diseases, Department of Internal Medicine, American University of Beirut Medical Center, Beirut, Lebanon
- * E-mail:
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17
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Ploemacher T, Faber WR, Menke H, Rutten V, Pieters T. Reservoirs and transmission routes of leprosy; A systematic review. PLoS Negl Trop Dis 2020; 14:e0008276. [PMID: 32339201 PMCID: PMC7205316 DOI: 10.1371/journal.pntd.0008276] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 05/07/2020] [Accepted: 04/07/2020] [Indexed: 01/08/2023] Open
Abstract
Leprosy is a chronic infectious disease caused by Mycobacterium leprae (M. leprae) and the more recently discovered Mycobacterium lepromatosis (M. lepromatosis). The two leprosy bacilli cause similar pathologic conditions. They primarily target the skin and the peripheral nervous system. Currently it is considered a Neglected Tropical Disease, being endemic in specific locations within countries of the Americas, Asia, and Africa, while in Europe it is only rarely reported. The reason for a spatial inequality in the prevalence of leprosy in so-called endemic pockets within a country is still largely unexplained. A systematic review was conducted targeting leprosy transmission research data, using PubMed and Scopus as sources. Publications between January 1, 1945 and July 1, 2019 were included. The transmission pathways of M. leprae are not fully understood. Solid evidence exists of an increased risk for individuals living in close contact with leprosy patients, most likely through infectious aerosols, created by coughing and sneezing, but possibly also through direct contact. However, this systematic review underscores that human-to-human transmission is not the only way leprosy can be acquired. The transmission of this disease is probably much more complicated than was thought before. In the Americas, the nine-banded armadillo (Dasypus novemcinctus) has been established as another natural host and reservoir of M. leprae. Anthroponotic and zoonotic transmission have both been proposed as modes of contracting the disease, based on data showing identical M. leprae strains shared between humans and armadillos. More recently, in red squirrels (Sciurus vulgaris) with leprosy-like lesions in the British Isles M. leprae and M. lepromatosis DNA was detected. This finding was unexpected, because leprosy is considered a disease of humans (with the exception of the armadillo), and because it was thought that leprosy (and M. leprae) had disappeared from the United Kingdom. Furthermore, animals can be affected by other leprosy-like diseases, caused by pathogens phylogenetically closely related to M. leprae. These mycobacteria have been proposed to be grouped as a M. leprae-complex. We argue that insights from the transmission and reservoirs of members of the M. leprae-complex might be relevant for leprosy research. A better understanding of possible animal or environmental reservoirs is needed, because transmission from such reservoirs may partly explain the steady global incidence of leprosy despite effective and widespread multidrug therapy. A reduction in transmission cannot be expected to be accomplished by actions or interventions from the human healthcare domain alone, as the mechanisms involved are complex. Therefore, to increase our understanding of the intricate picture of leprosy transmission, we propose a One Health transdisciplinary research approach. Leprosy is a chronic infectious disease caused by Mycobacterium leprae (M. leprae) and the more recently discovered Mycobacterium lepromatosis (M. lepromatosis). The two leprosy bacilli cause similar stigmatizing pathologic conditions. M. leprae primarily targets the skin and the peripheral nervous system. Currently it is considered a Neglected Tropical Disease. The transmission pathways of M. leprae are not fully understood. Solid evidence exists of an increased risk for individuals living in close contact with leprosy patients, most likely through infectious aerosols, created by coughing and sneezing, but possibly also through direct contact. However, this systematic review underscores that human-to-human transmission is not the only way leprosy can be acquired. Anthroponotic and zoonotic transmission have both been proposed as modes of contracting the disease, based on data showing identical M. leprae strains shared between humans and armadillos. A better understanding of possible animal or environmental reservoirs is needed, because transmission from such reservoirs may partly explain the steady global incidence of leprosy despite effective and widespread multidrug therapy. Reducing transmission cannot be expected from the human healthcare domain alone, as the mechanisms involved are complex. Therefore, we propose a One Health transdisciplinary research approach.
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Affiliation(s)
- Thomas Ploemacher
- Faculty of Science, Freudenthal Institute & Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, Utrecht, the Netherlands
| | - William R. Faber
- Faculty of Medicine, Department of Dermatology, University of Amsterdam, Amsterdam, the Netherlands
| | - Henk Menke
- Faculty of Science, Freudenthal Institute & Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, Utrecht, the Netherlands
| | - Victor Rutten
- Faculty of Veterinary Medicine, Utrecht University, the Netherlands
- Dept of Veterinary Tropical Diseases, Faculty of Veterinary Science, University of Pretoria, Republic of South Africa
| | - Toine Pieters
- Faculty of Science, Freudenthal Institute & Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, Utrecht, the Netherlands
- * E-mail:
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18
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Migambi P, Gasana M, Uwizeye CB, Kamanzi E, Ndahindwa V, Kalisvaart N, Klinkenberg E. Prevalence of tuberculosis in Rwanda: Results of the first nationwide survey in 2012 yielded important lessons for TB control. PLoS One 2020; 15:e0231372. [PMID: 32324750 PMCID: PMC7179849 DOI: 10.1371/journal.pone.0231372] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Accepted: 03/23/2020] [Indexed: 11/18/2022] Open
Abstract
Background Rwanda conducted a national tuberculosis (TB) prevalence survey to determine the magnitude of TB in the country and determine to what extent the national surveillance system captures all TB cases. In addition we measured the patient diagnostic rate, comparing the measured TB burden data with the routine surveillance data to gain insight into how well key population groups are being detected. Methods A national representative nationwide cross-sectional survey was conducted in 73 clusters in 2012 whereby all enrolled participants (residents aged 15 years and above) were systematically screened for TB by symptoms and chest X-ray (CXR). Those with either clinical symptoms (cough of any duration) and/or CXR abnormalities suggestive of TB disease were requested to provide two sputum samples (one spot and one morning) for smear examination and solid culture. Results Of the 45,058 eligible participants, 43,779 were enrolled in the survey. Participation rate was high at 95.7% with 99.8% of participants undergoing both screening procedures and 99.0% of those eligible for sputum examination submitting at least one sputum sample. Forty cases of prevalent mycobacterium tuberculosis (MTB) and 16 mycobacteria other than tuberculosis (MOTT) cases were detected during the survey. Chest x-ray as screening tool had 3 and 5 times greater predictive odds for smear positive and bacteriological confirmed TB than symptom screening alone respectively. A TB prevalence of 74.1 (95% CI 48.3–99.3) per 100,000 adult population for smear positive TB and 119.3 (95% CI 78.8–159.9) per 100,000 adult population for bacteriological confirmed MTB was estimated for Rwanda. Conclusions The survey findings indicated a lower TB prevalence than previously estimated by WHO providing key lessons for national TB control, calling for more sensitive screening and diagnostic tools and a focus on key populations. Use of chest x-ray as screening tool was introduced to improve the diagnostic yield of TB.
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Affiliation(s)
- Patrick Migambi
- Rwanda Ministry of Health / Rwanda Biomedical Centre, Kigali, Rwanda
- * E-mail:
| | - Michel Gasana
- Rwanda Ministry of Health / Rwanda Biomedical Centre, Kigali, Rwanda
| | | | - Eliane Kamanzi
- Rwanda Ministry of Health / Rwanda Biomedical Centre, Kigali, Rwanda
| | - Vedaste Ndahindwa
- School of Public Health, College of Medicine and Health Sciences, University of Rwanda, Kigali, Rwanda
| | | | - Eveline Klinkenberg
- KNCV Tuberculosis Foundation, The Hague, the Netherlands
- Department of Global Health and Amsterdam Institute for Global Health and Development, Amsterdam University Medical Centers, Amsterdam, The Netherlands
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19
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Tang W, Mao Y, Li QY, Meng D, Chen L, Wang H, Zhu R, Zhang WX. Prevalence of Opportunistic Pathogens and Diversity of Microbial Communities in the Water System of a Pulmonary Hospital. Biomed Environ Sci 2020; 33:248-259. [PMID: 32438962 DOI: 10.3967/bes2020.034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 02/20/2020] [Indexed: 06/11/2023]
Abstract
OBJECTIVE Our objective was to investigate the occurrence of opportunistic pathogens and characterize the bacterial community structures in the water system of a pulmonary hospital. METHODS The water samples were collected from automatic and manual faucets in the consulting room, treatment room, dressing room, respiratory ward, and other non-medical rooms in three buildings of the hospital. Quantitative polymerase chain reaction was used to quantify the load of several waterborne opportunistic pathogens and related microorganisms, including Legionella spp., Mycobacterium spp., and M. avium. Illumina sequencing targeting 16S rRNA genes was performed to profile bacterial communities. RESULTS The occurrence rates of Legionella spp., Mycobacterium spp., and M. avium were 100%, 100%, and 76%, respectively in all samples. Higher occurrence rates of M. avium were observed in the outpatient service building (building 1, 91.7%) and respiration department and wards (building 2, 80%) than in the office building (building 3), where no M. avium was found. M. avium were more abundant in automatic faucets (average 2.21 × 10 4 gene copies/L) than in manual faucets (average 1.03 × 10 4 gene copies/mL) ( P < 0.01). Proteobacteria, Actinobacteria, Bacteroidetes, Cyanobacteria, Firmicutes, and Acidobacteria were the dominant bacterial phyla. Disinfectant residuals, nitrate, and temperature were found to be the key environmental factors driving microbial community structure shifts in water systems. CONCLUSION This study revealed a high level of colonization of water faucets by opportunistic pathogens and provided insight into the characteristics of microbial communities in a hospital water system and approaches to reduce risks of microbial contamination.
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Affiliation(s)
- Wei Tang
- State Key Laboratory for Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Yu Mao
- State Key Laboratory for Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Qiu Yan Li
- State Key Laboratory for Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Die Meng
- Department of Infection Control, Shanghai Pulmonary Hospital, Tongji University, Shanghai 200433, China
| | - Ling Chen
- State Key Laboratory for Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China;Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China
| | - Hong Wang
- State Key Laboratory for Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China;Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China
| | - Ren Zhu
- Department of Infection Control, Shanghai Pulmonary Hospital, Tongji University, Shanghai 200433, China
| | - Wei Xian Zhang
- State Key Laboratory for Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China;Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China
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20
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Blanco-Conde S, González-Cortés C, López-Medrano R, Palacios-Gutiérrez JJ, Diez-Tascón C, Nebreda-Mayoral T, Sierra-García MJ, Rivero-Lezcano OM. A strategy based on Amplified Fragment Length Polymorphism (AFLP) for routine genotyping of nontuberculous mycobacteria at the clinical laboratory. Mol Biol Rep 2020; 47:3397-3405. [PMID: 32297290 DOI: 10.1007/s11033-020-05420-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Accepted: 04/03/2020] [Indexed: 11/25/2022]
Abstract
The increasing worldwide incidence of mycobacteriosis and the need to achieve improved clinical management makes nontuberculous mycobacteria (NTM) genotyping a useful tool. However, because of technical difficulties, medium size microbiology laboratories do not attempt to compare the genetic patterns that each of their isolates present. We have aimed to optimize a genotyping method with a reduced hands-on experimental time and that requires few technical resources. A strategy based on the Amplified Fragment Length Polymorphism (AFLP) methodology was developed using two rare-cutters enzymes (SacI and BglII). One out of seven primers was sequentially used in each amplification reaction that was analyzed by agarose gel electrophoresis. This approach makes it possible the timely genotyping of a moderate number of strains and its characterization without the need of image analysis software. We have genotyped 28 Mycobacterium intracellulare and 4 M. abscessus. Clinical researchers are encouraged to routinely genotype their NTM isolates.
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Affiliation(s)
- Sara Blanco-Conde
- Servicio de Análisis Clínicos, Hospital de Palamós, Edificio Fleming, Carrer Hospital 36, 17230, Girona, Spain
| | | | - Ramiro López-Medrano
- Servicio de Microbiología Clínica, Hospital Universitario de León, Altos de Nava, s/n, 24080, León, Spain
| | - Juan José Palacios-Gutiérrez
- Unidad de Referencia Regional de Micobacterias, Servicio de Microbiología, Hospital Universitario Central de Asturias, Avda. Roma s/n, 33011, Oviedo, Asturias, Spain
| | - Cristina Diez-Tascón
- Servicio de Anatomía Patológica, Hospital Universitario de León, Altos de Nava, s/n, 24080, León, Spain
| | - Teresa Nebreda-Mayoral
- Servicio de Microbiología, Hospital Clínico Universitario de Valladolid, C/ Ramon y Cajal 3, 47005, Valladolid, Spain
| | | | - Octavio Miguel Rivero-Lezcano
- Unidad de Investigación, Hospital Universitario de León, Altos de Nava, s/n, 24080, León, Spain.
- Institute of Biomedical Research of Salamanca (IBSAL), Salamanca, Spain.
- Institute of Biomedicine, University of León, León, Spain.
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21
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Abstract
This study aims to elucidate the strains and drug resistance of mycobacterium isolated from osteoarticular tuberculosis (OATB) patients and provide a reference for the diagnosis and treatment of OATB.Sixty-nine clinically diagnosed and surgically treated OATB patients were collected in time period of January 2017 to December 2018 at the First Affiliated Hospital of Xinjiang Medical University. The BACTEC MGIT 960 system was used for mycobacteria culturing, strain identification, and drug susceptibility testing, and the mycobacteria culture positive rate, species distribution, and drug resistance were analyzed.Within 4 weeks, 24 (34.78%) isolates of mycobacteria culture were positive; 40 (57.97%) isolates were positive, when culturing time was expanded to 8 weeks, and the difference was statistically significant (P < .05). Among the 40 isolates, 24 (60%) were identified as mycobacterium tuberculosis (MTB), 10 (25%) were Mycobacterium bovis, and 6 (15%) were non-tuberculous mycobacteria (NTM). Among total 69 isolates, 40 were enrolled in drug sensitivity test, and 15 (37.5%) isolates were confirmed drug resistant strains, in which 5 isolates were MTB, 4 isolates were M. bovis, and 6 isolates of NTM.The pathogen of clinically diagnosed OATB was mainly MTB. However, M. bovis and NTM also accounted for a considerable proportion, and their drug resistance rate was higher. Extending the culturing time appropriately could improve the culture positive rate. NTM was a drug resistant strain, and mycobacteria culturing, strain identification, and drug resistance analysis should be carried out to serve as a guide for individual treatment.
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Lattos A, Giantsis IA, Karagiannis D, Michaelidis B. First detection of the invasive Haplosporidian and Mycobacteria parasites hosting the endangered bivalve Pinna nobilis in Thermaikos Gulf, North Greece. Mar Environ Res 2020; 155:104889. [PMID: 32072991 DOI: 10.1016/j.marenvres.2020.104889] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 01/20/2020] [Accepted: 01/20/2020] [Indexed: 06/10/2023]
Abstract
Mycobacterium sp. and Haplosporidium pinnae constitute invasive parasite species of bivalves, reported for the first time in the present study in the Aegean Sea and Thermaikos Gulf, respectively. During the last years, the endangered fan mussel (Pinna nobilis) experienced several mortality events in the Mediterranean Sea that caused deaths to 90% or more of their populations and have been attributed to infections by these pathogens. In Greece, two mass mortality events have been recently reported, namely in the Gulf of Kalloni and in Limnos island. In the present study we investigated the presence of both pathogens in P. nobilis from these marine areas as well as from Thermaikos Gulf using both histopathological microscopy and molecular markers. The detected parasite DNA was further quantified in the three populations utilizing a real time qPCR. Histopathological results indicated the presence of a Mycobacterium species alongside with the existence of the Haplosporidian parasite, which was identified in all mortality events in the Mediterranean Sea. The parasite was present in different phases mostly on the digestive gland epithelium. Phylogenetic analysis confirmed the taxonomy of the Haplosporidian parasite as the recently described Haplosporidium pinnae, whereas it failed to identify the Mycobacteria parasite at species level. While Mycobacterium sp. was detected in all examined specimens, H. pinnae was not detected in all diseased fan mussels. Interestingly, monitoring of P. nobilis population from Thermaikos Gulf, an estuary of extremely high importance for bivalve production, revealed the presence of both pathogens in a few specimens in higher quantity but with no symptoms of the disease. Besides, all the specimens from Thermaikos Gulf had inflammatory responses similarly to moribund specimens from mortality events.
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Affiliation(s)
- Athanasios Lattos
- Laboratory of Animal Physiology, Department of Zoology, School of Biology, Faculty of Science, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece
| | - Ioannis A Giantsis
- Department of Animal Science, Faculty of Agricultural Sciences, University of Western Macedonia, 53100, Florina, Greece.
| | - Dimitrios Karagiannis
- National Reference Laboratory for Mollusc Diseases, Ministry of Rural Development and Food, 7 Frixou street, 54627, Thessaloniki, Greece
| | - Basile Michaelidis
- Laboratory of Animal Physiology, Department of Zoology, School of Biology, Faculty of Science, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece
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23
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Guthrie JL, Strudwick L, Roberts B, Allen M, McFadzen J, Roth D, Jorgensen D, Rodrigues M, Tang P, Hanley B, Johnston J, Cook VJ, Gardy J. Comparison of routine field epidemiology and whole genome sequencing to identify tuberculosis transmission in a remote setting. Epidemiol Infect 2020; 148:e15. [PMID: 32014080 PMCID: PMC7019559 DOI: 10.1017/s0950268820000072] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Revised: 12/04/2019] [Accepted: 01/09/2020] [Indexed: 11/29/2022] Open
Abstract
Yukon Territory (YT) is a remote region in northern Canada with ongoing spread of tuberculosis (TB). To explore the utility of whole genome sequencing (WGS) for TB surveillance and monitoring in a setting with detailed contact tracing and interview data, we used a mixed-methods approach. Our analysis included all culture-confirmed cases in YT (2005-2014) and incorporated data from 24-locus Mycobacterial Interspersed Repetitive Units-Variable Number of Tandem Repeats (MIRU-VNTR) genotyping, WGS and contact tracing. We compared field-based (contact investigation (CI) data + MIRU-VNTR) and genomic-based (WGS + MIRU-VNTR + basic case data) investigations to identify the most likely source of each person's TB and assessed the knowledge, attitudes and practices of programme personnel around genotyping and genomics using online, multiple-choice surveys (n = 4) and an in-person group interview (n = 5). Field- and genomics-based approaches agreed for 26 of 32 (81%) cases on likely location of TB acquisition. There was less agreement in the identification of specific source cases (13/22 or 59% of cases). Single-locus MIRU-VNTR variants and limited genetic diversity complicated the analysis. Qualitative data indicated that participants viewed genomic epidemiology as a useful tool to streamline investigations, particularly in differentiating latent TB reactivation from the recent transmission. Based on this, genomic data could be used to enhance CIs, focus resources, target interventions and aid in TB programme evaluation.
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Affiliation(s)
- J. L. Guthrie
- School of Population and Public Health, University of British Columbia, Vancouver, Canada
| | - L. Strudwick
- Yukon Communicable Disease Control, Health and Social Services, Government of Yukon, Whitehorse, Canada
| | - B. Roberts
- Yukon Communicable Disease Control, Health and Social Services, Government of Yukon, Whitehorse, Canada
| | - M. Allen
- Yukon Communicable Disease Control, Health and Social Services, Government of Yukon, Whitehorse, Canada
| | - J. McFadzen
- Yukon Communicable Disease Control, Health and Social Services, Government of Yukon, Whitehorse, Canada
| | - D. Roth
- British Columbia Centre for Disease Control, Vancouver, Canada
| | - D. Jorgensen
- British Columbia Centre for Disease Control, Public Health Laboratory, Vancouver, Canada
| | - M. Rodrigues
- British Columbia Centre for Disease Control, Public Health Laboratory, Vancouver, Canada
| | - P. Tang
- Department of Pathology, Sidra Medical and Research Center, Doha, Qatar
| | - B. Hanley
- Department of Health and Social Services, Government of Yukon, Whitehorse, Canada
| | - J. Johnston
- British Columbia Centre for Disease Control, Vancouver, Canada
- Department of Medicine, University of British Columbia, Vancouver, Canada
| | - V. J. Cook
- British Columbia Centre for Disease Control, Vancouver, Canada
- Department of Medicine, University of British Columbia, Vancouver, Canada
| | - J.L. Gardy
- School of Population and Public Health, University of British Columbia, Vancouver, Canada
- British Columbia Centre for Disease Control, Vancouver, Canada
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Delghandi MR, Menanteau-Ledouble S, Waldner K, El-Matbouli M. Renibacterium salmoninarum and Mycobacterium spp.: two bacterial pathogens present at low levels in wild brown trout (Salmo trutta fario) populations in Austrian rivers. BMC Vet Res 2020; 16:40. [PMID: 32013968 PMCID: PMC6998173 DOI: 10.1186/s12917-020-2260-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Accepted: 01/24/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Renibacterium salmoninarum and Mycobacterium sp. are important bacterial pathogens of fish. R. salmoninarum is the causative agent of bacterial kidney disease, a Gram-positive bacterium mostly known for causing chronic infections in salmonid fish, while multiple species belonging to the Mycobacterium genus have been associated with mycobacteriosis in fish as well as in human. The objective of this study was to determine the prevalence of these two bacterial pathogens in populations of wild brown trout (Salmo trutta fario) in four rivers (Kamp, Wulka, Traun and Ybbs) in Austria. RESULTS A total of 457 kidney samples were examined for both bacterial agents using nested and conventional PCR as well as bacterial cultivation on KDM-2, histological examination and immunohistochemistry. Molecular evidence showed an estimated prevalence level of 0.94% for R. salmoninarum in 2017 while the bacterium could not be detected in 2018 and histology showed signs consistent with a low-level chronic inflammation in the kidney of infected fish. Similarly, no fish were found positive for Mycobacterium in 2017 but in 2018, the prevalence was found to be 37.03% in the Kamp river (4.08% across all rivers). The sequencing data confirmed that these fish carried Mycobacterium sp. although the precise species of Mycobacterium could not be ascertained. CONCLUSIONS This survey constitutes the first insight into the prevalence rate of R. salmoninarum and Mycobacterium sp. in wild brown trout (Salmo trutta fario) populations in Austria. Both of these pathogens were only detected in the summer months (June and July), which might suggest that the stress linked to increased water temperature could act as stressor factor and contribute to the outbreak of these diseases. The age of the fish might also play a role, especially in the case of Mycobacterium sp. as all the infected fish were in their first summer (June).
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Affiliation(s)
- M. R. Delghandi
- Clinical Division of Fish Medicine, University of Veterinary Medicine, Veterinärplatz 1, 1210 Vienna, Austria
| | - S. Menanteau-Ledouble
- Clinical Division of Fish Medicine, University of Veterinary Medicine, Veterinärplatz 1, 1210 Vienna, Austria
| | - K. Waldner
- Clinical Division of Fish Medicine, University of Veterinary Medicine, Veterinärplatz 1, 1210 Vienna, Austria
| | - M. El-Matbouli
- Clinical Division of Fish Medicine, University of Veterinary Medicine, Veterinärplatz 1, 1210 Vienna, Austria
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25
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Xiao G, He X, Zhang S, Liu Y, Liang Z, Liu H, Zhang J, Ou M, Cai S, Lai W, Zhang T, Ren L, Zhang G. Cas12a/Guide RNA-Based Platform for Rapid and Accurate Identification of Major Mycobacterium Species. J Clin Microbiol 2020; 58:e01368-19. [PMID: 31723010 PMCID: PMC6989083 DOI: 10.1128/jcm.01368-19] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 11/04/2019] [Indexed: 12/26/2022] Open
Abstract
Mycobacterium tuberculosis infection and nontuberculous mycobacteria (NTM) infections exhibit similar clinical symptoms; however, the therapies for these two types of infections are different. Therefore, the rapid and accurate identification of M. tuberculosis and NTM species is very important for the control of tuberculosis and NTM infections. In the present study, a Cas12a/guide RNA (gRNA)-based platform was developed to identify M. tuberculosis and most NTM species. By designing species-specific gRNA probes targeting the rpoB sequence, a Cas12a/gRNA-based platform successfully identified M. tuberculosis and six major NTM species (Mycobacterium abscessus, Mycobacterium intracellulare, Mycobacterium avium, Mycobacterium kansasii, Mycobacterium gordonae, and Mycobacterium fortuitum) without cross-reactivity. In a blind assessment, a total of 72 out of 73 clinical Mycobacterium isolates were correctly identified, which is consistent with previous rpoB sequencing results. These results suggest that the Cas12a/gRNA-based platform is a promising tool for the rapid, accurate, and cost-effective identification of both M. tuberculosis and NTM species.
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Affiliation(s)
- Guohui Xiao
- National Clinical Research Center for Infectious Diseases, Guangdong Key Laboratory of Emerging Infectious Diseases, Shenzhen Third People's Hospital, Southern University of Science and Technology, Shenzhen, China
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health (GIBH), Chinese Academy of Sciences (CAS), Guangzhou, China
| | - Xing He
- National Clinical Research Center for Infectious Diseases, Guangdong Key Laboratory of Emerging Infectious Diseases, Shenzhen Third People's Hospital, Southern University of Science and Technology, Shenzhen, China
| | - Su Zhang
- National Clinical Research Center for Infectious Diseases, Guangdong Key Laboratory of Emerging Infectious Diseases, Shenzhen Third People's Hospital, Southern University of Science and Technology, Shenzhen, China
| | - Yaya Liu
- National Clinical Research Center for Infectious Diseases, Guangdong Key Laboratory of Emerging Infectious Diseases, Shenzhen Third People's Hospital, Southern University of Science and Technology, Shenzhen, China
| | - Zhihang Liang
- School of Basic Medical Sciences, Guangdong Medical University, Dongguan, China
| | - Houming Liu
- National Clinical Research Center for Infectious Diseases, Guangdong Key Laboratory of Emerging Infectious Diseases, Shenzhen Third People's Hospital, Southern University of Science and Technology, Shenzhen, China
| | - Juanjuan Zhang
- National Clinical Research Center for Infectious Diseases, Guangdong Key Laboratory of Emerging Infectious Diseases, Shenzhen Third People's Hospital, Southern University of Science and Technology, Shenzhen, China
| | - Min Ou
- National Clinical Research Center for Infectious Diseases, Guangdong Key Laboratory of Emerging Infectious Diseases, Shenzhen Third People's Hospital, Southern University of Science and Technology, Shenzhen, China
| | - Shuhao Cai
- National Clinical Research Center for Infectious Diseases, Guangdong Key Laboratory of Emerging Infectious Diseases, Shenzhen Third People's Hospital, Southern University of Science and Technology, Shenzhen, China
| | - Wenjie Lai
- National Clinical Research Center for Infectious Diseases, Guangdong Key Laboratory of Emerging Infectious Diseases, Shenzhen Third People's Hospital, Southern University of Science and Technology, Shenzhen, China
| | - Tianyu Zhang
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health (GIBH), Chinese Academy of Sciences (CAS), Guangzhou, China
| | - Lili Ren
- Institute of Pathogen Biology (IPB), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Guoliang Zhang
- National Clinical Research Center for Infectious Diseases, Guangdong Key Laboratory of Emerging Infectious Diseases, Shenzhen Third People's Hospital, Southern University of Science and Technology, Shenzhen, China
- School of Basic Medical Sciences, Guangdong Medical University, Dongguan, China
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26
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Kardan-Yamchi J, Mahboubi M, Kazemian H, Hamzelou G, Feizabadi MM. The Chemical Composition and Anti-mycobacterial Activities of Trachyspermum copticum and Pelargonium graveolens Essential Oils. Recent Pat Anticancer Drug Discov 2020; 15:68-74. [PMID: 31657682 PMCID: PMC8493785 DOI: 10.2174/1574891x14666191028113321] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 09/02/2019] [Accepted: 09/26/2019] [Indexed: 11/28/2022]
Abstract
BACKGROUND Microbial resistance to antibiotics and their adverse effects related to these antibiotics are a matter of global public health in the 21th century. The emergence of drug-resistant strains, has gained the interest of the scientists to discover new antimicrobial agents from the essential oil of medicinal plants. METHODS Anti-mycobacterial effects of Trachyspermum copticum and Pelargonium graveolens essential oils were determined against multi-drug resistant clinical strains of Mycobacterium tuberculosis, Mycobacterium kansasii, Mycobacterium fortuitum and standard strain of Mycobacterium tuberculosis H37Rv by a Broth micro-dilution method. Pelargonium graveolens plant named Narmada was discovered by Kulkarni R.N et al. (Patent ID, USPP12425P2) and a formulation comprising thymol obtained from Trachyspermum is useful in the treatment of drug-resistant bacterial infections (Patent ID, US6824795B2). The chemical composition of hydro-distilled essential oils was determined by GC and GC-MS. RESULTS Minimum Inhibitory Concentration (MIC) values for T. copticum essential oil against tested isolates were ranged from 19.5 µg/mL to 78 µg/mL. The least minimum inhibitory concentration of P. graveolens extract against M. Kansasii and MDR-TB was 78 µg/ml. CONCLUSION The results of the present research introduced T. copticum and P. graveolens essential oils as a remarkable natural anti-mycobacterial agent, but more pharmacological studies are required to evaluate their efficacy in animal models.
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Affiliation(s)
| | | | | | | | - Mohammad M. Feizabadi
- Address correspondence to this author at Department of Medical Microbiology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran; Thoracic Research Center, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran; Fax: 00982188955810; Tel: 09141904331; E-mail:
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27
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Gibson J, Baird T, Pandey S, Tolson C, Coulter C, Eather G, Thomson R. The clinical significance of Mycobacterium triplex. Respir Med 2019; 159:105808. [PMID: 31731086 DOI: 10.1016/j.rmed.2019.105808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2019] [Revised: 09/08/2019] [Accepted: 11/01/2019] [Indexed: 11/19/2022]
Abstract
OBJECTIVES Mycobacterium triplex is a slow-growing nontuberculous mycobacteria (NTM) and is a rare cause of human disease. The pathogenicity, natural history and spectrum of disease is unknown. The aim of this study was to review the clinical features, outcomes and drug susceptibility testing (DST) of all M. triplex isolates in Queensland, Australia to guide management of this rare NTM infection in the future. METHODS This retrospective study included all patients who isolated M. triplex in Queensland, Australia from the 1st January 2000 to 31st December 2016. Clinical information was obtained from medical records to determine the clinical significance of isolates, natural history of disease and treatment outcomes. DST was performed on 15 isolates. RESULTS Forty-three patients (21 male) had positive cultures for M. triplex. Thirty-nine patients had isolates from pulmonary specimens and 17 (43.6%) met the American Thoracic Society criteria for NTM lung disease. Six patients with pulmonary infection received antimicrobial therapy with 5 patients demonstrating treatment success. Four patients had localised extrapulmonary disease and were cured with surgical management ± antimicrobial therapy. DST suggests 93% of isolates are susceptible to macrolides. CONCLUSION This is the largest case series of M. triplex isolates and confirms it is a rare human pathogen. Extrapulmonary disease responded well to surgical management. Treatment of M. triplex pulmonary disease is challenging, and the optimal antimicrobial regimen is unknown. However, the DST data suggests macrolide resistance is rare and macrolides should be included in treatment regimens.
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Affiliation(s)
- Justine Gibson
- Princess Alexandra Hospital, Brisbane, Queensland, Australia; Metro South Clinical Tuberculosis Service, Brisbane, Queensland, Australia.
| | - Tim Baird
- Sunshine Coast University Hospital, Queensland, Australia
| | - Sushil Pandey
- Queensland Mycobacterium Reference Laboratory (QMRL), Pathology Queensland, Brisbane, Australia
| | - Carla Tolson
- Queensland Mycobacterium Reference Laboratory (QMRL), Pathology Queensland, Brisbane, Australia
| | - Chris Coulter
- Metro South Clinical Tuberculosis Service, Brisbane, Queensland, Australia; Queensland Mycobacterium Reference Laboratory (QMRL), Pathology Queensland, Brisbane, Australia
| | - Geoffrey Eather
- Princess Alexandra Hospital, Brisbane, Queensland, Australia; Metro South Clinical Tuberculosis Service, Brisbane, Queensland, Australia
| | - Rachel Thomson
- Metro South Clinical Tuberculosis Service, Brisbane, Queensland, Australia; University of Queensland, Brisbane, Queensland, Australia; Gallipoli Medical Research Institute, Brisbane, Queensland, Australia; Greenslopes Private Hospital, Brisbane, Queensland, Australia
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Hanson C, Bishop MM, Barney JT, Vargis E. Effect of growth media and phase on Raman spectra and discrimination of mycobacteria. J Biophotonics 2019; 12:e201900150. [PMID: 31291064 DOI: 10.1002/jbio.201900150] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Revised: 06/26/2019] [Accepted: 07/09/2019] [Indexed: 06/09/2023]
Abstract
When developing a Raman spectral library to identify bacteria, differences between laboratory and real world conditions must be considered. For example, culturing bacteria in laboratory settings is performed under conditions for ideal bacteria growth. In contrast, culture conditions in the human body may differ and may not support optimized bacterial growth. To address these differences, researchers have studied the effect of conditions such as growth media and phase on Raman spectra. However, the majority of these studies focused on Gram-positive or Gram-negative bacteria. This article focuses on the influence of growth media and phase on Raman spectra and discrimination of mycobacteria, an acid-fast genus. Results showed that spectral differences from growth phase and media can be distinguished by spectral observation and multivariate analysis. Results were comparable to those found for other types of bacteria, such as Gram-positive and Gram-negative. In addition, the influence of growth phase and media had a significant impact on machine learning models and their resulting classification accuracy. This study highlights the need for machine learning models and their associated spectral libraries to account for various growth parameters and stages to further the transition of Raman spectral analysis of bacteria from laboratory to clinical settings.
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Subramaniam M, Arshad NM, Mun KS, Malagobadan S, Awang K, Nagoor NH. Anti-Cancer Effects of Synergistic Drug-Bacterium Combinations on Induced Breast Cancer in BALB/c Mice. Biomolecules 2019; 9:biom9100626. [PMID: 31635311 PMCID: PMC6843452 DOI: 10.3390/biom9100626] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 07/17/2019] [Accepted: 07/18/2019] [Indexed: 12/18/2022] Open
Abstract
Cancer development and progression are extremely complex due to the alteration of various genes and pathways. In most cases, multiple agents are required to control cancer progression. The purpose of this study is to investigate, using a mouse model, the synergistic interactions of anti-cancer agents, 1'-S-1'-acetoxychavicol acetate (ACA), Mycobacterium indicus pranii (MIP), and cisplatin (CDDP) in double and triple combinations to treat chemo-sensitize and immune-sensitize breast cancer. Changes in tumor volume and body weight were monitored. Organs were harvested and stained using hematoxylin-eosin for histopathological assessment. Milliplex enzyme-linked immunosorbent assay (ELISA) was performed to determine cytokine levels, while immunohistochemistry (IHC) was conducted on tumor biopsies to verify systemic drug effects. In vivo mouse models showed tumor regression with maintenance of regular body weight for all the different treatment regimens. IHC results provided conclusive evidence indicating that combination regimens were able to down-regulate nuclear factor kappa-B activation and reduce the expression of its regulated pro-inflammatory proteins. Reduction of pro-inflammatory cytokines (e.g., IL-6, TNF-α, and IFN-ɣ) levels were observed when using the triple combination, which indicated that the synergistic drug combination was able to significantly control cancer progression. In conclusion, ACA, MIP, and CDDP together serve as promising candidates for further development and for subsequent clinical trials against estrogen-sensitive breast cancer.
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Affiliation(s)
- Menaga Subramaniam
- Institute of Biological Sciences (Genetics and Molecular Biology), Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia.
| | - Norhafiza M Arshad
- Centre for Research in Biotechnology for Agriculture (CEBAR), University of Malaya, Kuala Lumpur 50603, Malaysia.
| | - Kein Seong Mun
- Department of Pathology, Faculty of Medicine, University of Malaya, Kuala Lumpur 50603, Malaysia.
| | - Sharan Malagobadan
- Institute of Biological Sciences (Genetics and Molecular Biology), Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia.
- Centre for Research in Biotechnology for Agriculture (CEBAR), University of Malaya, Kuala Lumpur 50603, Malaysia.
| | - Khalijah Awang
- Centre for Natural Product Research and Drug Discovery (CENAR) & Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia.
| | - Noor Hasima Nagoor
- Institute of Biological Sciences (Genetics and Molecular Biology), Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia.
- Centre for Research in Biotechnology for Agriculture (CEBAR), University of Malaya, Kuala Lumpur 50603, Malaysia.
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Tsai MA, Wang PC, Yoshida S, Aono A, Mitarai S, Wada T, Chen SC. Establishment of loop-mediated isothermal amplification for rapid and convenient detection of Mycobacterium marinum complex. J Microbiol Methods 2019; 164:105671. [PMID: 31326444 DOI: 10.1016/j.mimet.2019.105671] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Revised: 07/16/2019] [Accepted: 07/16/2019] [Indexed: 12/24/2022]
Abstract
Mycobacterium marinum is a zoonotic pathogen that can cause dermatological infection mainly from contaminated water or fish. Some well-known genetically similar species and subspecies are M. lifrandii and M. pseudoshottsii from amphibians and fish in aquaculture, and M. ulcerans, a causative agent of a neglected tropical disease (NTD), Buruli ulcer. They are believed to survive in water as their major niche, which might be related to their source of infection, but detailed ecological surveillance of the species complex remains to be done. Herein, we present a new detection system for M. marinum complex based on isothermal DNA amplification that can be conducted conveniently with high sensitivity and specificity. The target was a chromosomal gene, mrsA, including a restriction polymorphism between M. ulcerans (except for the most ancestral subspecies, M. ulcerans subsp. shinshuense) and the other species. The system was able to detect less than 500 fg (approximately 70 copies) of genomic DNA of M. marinum, within 60 min, and caused no amplification from mycobacterial species other than M. marinum complex species. It was also verified that restriction of the amplified DNA fragments was able to discriminate M. ulcerans as expected. This easy, quick, and convenient system is expected to facilitate detection of M. marinum complex from various resources.
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Affiliation(s)
- Ming-An Tsai
- Department of Biology, National Museum of Marine Biology and Aquarium, Checheng, Pingtung, Taiwan, Republic of China; Graduate Institute of Marine Biology, National Dong Hwa University, Checheng, Pingtung, Taiwan, Republic of China
| | - Pei-Chi Wang
- Department of Veterinary Medicine, College of Veterinary Medicine, National Pingtung University of Science and Technology, Neipu, Pingtung, Taiwan, Republic of China
| | - Shiomi Yoshida
- Clinical Research Center, National Hospital Organization Kinki-chuo Chest Medical Center, Sakai, Osaka, Japan; Department of International Health, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | - Akio Aono
- Department of Mycobacterium Reference and Research, The Research Institute of Tuberculosis, Anti-tuberculosis Association, Kiyose, Tokyo, Japan
| | - Satoshi Mitarai
- Department of Mycobacterium Reference and Research, The Research Institute of Tuberculosis, Anti-tuberculosis Association, Kiyose, Tokyo, Japan
| | - Takayuki Wada
- Department of International Health, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan; School of Tropical Medicine and Global Health, Nagasaki University, Nagasaki, Japan.
| | - Shih-Chu Chen
- Department of Veterinary Medicine, College of Veterinary Medicine, National Pingtung University of Science and Technology, Neipu, Pingtung, Taiwan, Republic of China.
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Yoshida S, Suga S, Ishikawa S, Mukai Y, Tsuyuguchi K, Inoue Y, Yamamoto T, Wada T. Mycobacterium caprae Infection in Captive Borneo Elephant, Japan. Emerg Infect Dis 2019; 24:1937-1940. [PMID: 30226170 PMCID: PMC6154153 DOI: 10.3201/eid2410.180018] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
In 2016, disseminated tuberculosis caused by Mycobacterium caprae was diagnosed in a captive Borneo elephant in Japan. The bacterium was initially identified from clinical isolates. An isolate collected during a relapse showed isoniazid monoresistance and a codon 315 katG mutation.
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Ahmad M, Ibrahim WH, Sarafandi SA, Shahzada KS, Ahmed S, Haq IU, Raza T, Hameed MA, Thomas M, Swehli HAI, Sattar HA. Diagnostic value of bronchoalveolar lavage in the subset of patients with negative sputum/smear and mycobacterial culture and a suspicion of pulmonary tuberculosis. Int J Infect Dis 2019; 82:96-101. [PMID: 30904678 DOI: 10.1016/j.ijid.2019.03.021] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 03/10/2019] [Accepted: 03/14/2019] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND The diagnostic value of bronchoalveolar lavage in patients with negative sputum/smear for tuberculous bacilli has been well studied. However, its value in the subset of patients with both negative sputum/smear and culture is seldom reported. METHODS A retrospective study of patients referred for diagnostic bronchoscopy for the suspicion of pulmonary tuberculosis during the period from April 1st, 2015 to March 30th, 2016, and who had negative sputum/smear and culture for tuberculous bacilli. RESULTS One hundred and ninety patients fulfilled the inclusion criteria. Bronchoalveolar lavage detected further 61/190 (32.1%) pulmonary tuberculosis cases. Bronchoalveolar lavage mycobacterial culture and polymerase chain reaction (positive in 60/190 (31.6%) and 58/190 (30.5%) of patients respectively) provided the highest diagnostic yield, whereas direct smear provided the lowest yield. Bronchoalveolar lavage had a sensitivity of 89.7%, a specificity of 100%, a positive predictive value of 100%, a negative predictive value of 94.6%, and a test accuracy of 96.3% in suspected pulmonary tuberculosis cases with negative sputum/smear and culture. Positive bronchoalveolar lavage yield for tuberculosis was significantly associated with a positive QuantiFERON-TB Gold In-Tube test, positive purified protein derivative skin test, radiological evidence of upper zone abnormality and patient's origin being from the Indian subcontinent. CONCLUSION Bronchoalveolar lavage should be pursued as a useful diagnostic tool for suspected pulmonary tuberculosis cases when sputum/smear and culture are negative. Its value is higher in the subset of patients with positive QuantiFERON-TB Gold In-Tube test, positive purified protein derivative skin test, upper zone abnormality on radiograph or being from the Indian subcontinent.
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Affiliation(s)
- Mushtaq Ahmad
- Department of Medicine, Hamad General Hospital, Weill-Cornell Medical College, Doha, Qatar.
| | - Wanis H Ibrahim
- Hamad General Hospital, Qatar University and Weill-Cornell Medical College, Doha, Qatar.
| | | | | | - Shakeel Ahmed
- Department of Medicine, Hamad General Hospital, Doha, Qatar.
| | - Irfan Ul Haq
- Department of Medicine, Hamad General Hospital, Doha, Qatar.
| | - Tasleem Raza
- Hamad General Hospital, Weill-Cornell Medical College, Doha, Qatar.
| | | | - Merlin Thomas
- Department of Medicine, Hamad General Hospital, Doha, Qatar.
| | | | - Hisham A Sattar
- Department of Medicine, Hamad General Hospital, Doha, Qatar.
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Franch O, Han X, Marcussen LB, Givskov A, Andersen MB, Godbole AA, Harmsen C, Nørskov-Lauritsen N, Thomsen J, Pedersen FS, Wang Y, Shi D, Wejse C, Pødenphant L, Nagaraja V, Bertl J, Stougaard M, Ho YP, Hede MS, Labouriau R, Knudsen BR. A new DNA sensor system for specific and quantitative detection of mycobacteria. Nanoscale 2019; 11:587-597. [PMID: 30556557 DOI: 10.1039/c8nr07850e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In the current study, we describe a novel DNA sensor system for specific and quantitative detection of mycobacteria, which is the causative agent of tuberculosis. Detection is achieved by using the enzymatic activity of the mycobacterial encoded enzyme topoisomerase IA (TOP1A) as a biomarker. The presented work is the first to describe how the catalytic activities of a member of the type IA family of topoisomerases can be exploited for specific detection of bacteria. The principle for detection relies on a solid support anchored DNA substrate with dual functions namely: (1) the ability to isolate mycobacterial TOP1A from crude samples and (2) the ability to be converted into a closed DNA circle upon reaction with the isolated enzyme. The DNA circle can act as a template for rolling circle amplification generating a tandem repeat product that can be visualized at the single molecule level by fluorescent labelling. This reaction scheme ensures specific, sensitive, and quantitative detection of the mycobacteria TOP1A biomarker as demonstrated by the use of purified mycobacterial TOP1A and extracts from an array of non-mycobacteria and mycobacteria species. When combined with mycobacteriophage induced lysis as a novel way of effective yet gentle extraction of the cellular content from the model Mycobacterium smegmatis, the DNA sensor system allowed detection of mycobacteria in small volumes of cell suspensions. Moreover, it was possible to detect M. smegmatis added to human saliva. Depending on the composition of the sample, we were able to detect 0.6 or 0.9 million colony forming units (CFU) per mL of mycobacteria, which is within the range of clinically relevant infection numbers. We, therefore, believe that the presented assay, which relies on techniques that can be adapted to limited resource settings, may be the first step towards the development of a new point-of-care diagnostic test for tuberculosis.
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Affiliation(s)
- Oskar Franch
- Department of Molecular Biology and Genetics, Aarhus University, Aarhus, Denmark.
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Wang H, Xu J, Tang W, Li H, Xia S, Zhao J, Zhang W, Yang Y. Removal Efficacy of Opportunistic Pathogens and Bacterial Community Dynamics in Two Drinking Water Treatment Trains. Small 2019; 15:e1804436. [PMID: 30536542 DOI: 10.1002/smll.201804436] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Revised: 11/16/2018] [Indexed: 06/09/2023]
Abstract
Drinking water treatment processes (DWTPs) impact pathogen colonization and microbial communities in finished water; however, their efficacies against opportunistic pathogens are not fully understood. In this study, the effects of treatment steps on the removal of Legionella spp., Legionella pneumophila, nontuberculous mycobacteria, Mycobacterium avium, and two amoeba hosts (Vermamoeba vermiformis, Acanthamoeba) are evaluated in two parallel trains of DWTPs equipped with different pretreatment units. Quantitative polymerase chain reaction analysis demonstrates significantly reduced numbers of total bacteria, Legionella, and mycobacteria during ozonation, followed by a rebound in granular activated carbon (GAC) filtration, whereas sand filtration exerts an overarching effect in removing microorganisms in both treatment trains. V. vermiformis is more prevalent in biofilm (34%) than water samples (7.7%), while Acanthamoeba is not found in the two trains of DWTPs. Illumina sequencing of bacterial 16S rRNA genes reveals significant community shifts at different treatment steps, as well as distinct bacterial community structures in water and biofilm samples in parallel units (e.g., ozonation, GAC, sand filtration) between the two trains (analysis of similarities (ANOSIM), p < 0.05), implying the potential influence of different pretreatment steps in shaping the downstream microbiome. Overall, the results provide insights to mitigation of opportunistic pathogens and engineer approaches for managing bacterial communities in DWTPs.
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Affiliation(s)
- Hong Wang
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China
| | - Jiajiong Xu
- Shanghai Municipal Engineering Design Institute (Group) CO., LTD, Shanghai, 200092, China
| | - Wei Tang
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Huan Li
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Siqing Xia
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China
| | - Jianfu Zhao
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China
| | - Weixian Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China
| | - Yang Yang
- Department of Thoracic Surgery, Shanghai Pulmonary Hospital, Tongji University, Shanghai, 200433, China
- Institute for Advanced Study, Tongji University, 1239 Siping Road, Shanghai, 200430, China
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Dequéant B, Pascal Q, Bilbault H, Dagher E, Boschiroli ML, Cordonnier N, Reyes-Gomez E. Identification of Mycobacterium genavense natural infection in a domestic ferret. J Vet Diagn Invest 2019; 31:133-136. [PMID: 30475677 PMCID: PMC6505761 DOI: 10.1177/1040638718812137] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
A 6-y-old neutered male ferret ( Mustela putorius furo) was presented because of a 1-mo history of progressive weight loss, chronic cough, and hair loss. On clinical examination, the animal was coughing, slightly depressed, moderately hypothermic, and had bilateral epiphora. Thoracic radiography was suggestive of severe multinodular interstitial pneumonia. Abdominal ultrasound examination revealed hepatosplenomegaly and mesenteric and pancreaticoduodenal lymphadenopathy. Fine-needle aspiration of the pancreaticoduodenal lymph node, followed by routine Romanowsky and Ziehl-Neelsen stains, revealed numerous macrophages containing myriad acid-fast bacilli, leading to identification of mycobacteriosis. Autopsy and histologic examination confirmed the presence of disseminated, poorly defined, acid-fast, bacilli-rich granulomas in the pancreaticoduodenal and mesenteric lymph nodes, intestines, and lungs. Destaining of May-Grünwald/Giemsa-stained slides with alcohol, and then restaining with Ziehl-Neelsen, revealed acid-fast rods and avoided repeat tissue sampling without affecting the Ziehl-Neelsen stain quality and cytologic features. Tissue samples were submitted for a PCR assay targeting the heat shock protein gene ( hsp65) and revealed 100% homology with Mycobacterium genavense. We emphasize the use of special stains and PCR for identification of this potential zoonotic agent.
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Affiliation(s)
- Bérengère Dequéant
- LHA-Laboniris, Oniris-Ecole Nationale Vétérinaire, Agroalimentaire et de l’Alimentation Nantes, France (Dequéant)
- Université Paris-Est, Ecole Nationale Vétérinaire d’Alfort, Biopôle, Unité d’Histologie, d’Embryologie et d’Anatomie pathologique, Département des Sciences Biologiques et Pharmaceutiques, Maisons-Alfort, France (Pascal, Bilbault, Cordonnier, Reyes-Gomez)
- Université Paris-Est, Ecole Nationale Vétérinaire d’Alfort, UMR BIPAR, ANSES, INRA, Maisons-Alfort, France (Boschiroli)
- Pathology Department, Oniris-Ecole Nationale Vétérinaire, Agroalimentaire et de l’Alimentation, Nantes, France (Dagher)
| | - Quentin Pascal
- LHA-Laboniris, Oniris-Ecole Nationale Vétérinaire, Agroalimentaire et de l’Alimentation Nantes, France (Dequéant)
- Université Paris-Est, Ecole Nationale Vétérinaire d’Alfort, Biopôle, Unité d’Histologie, d’Embryologie et d’Anatomie pathologique, Département des Sciences Biologiques et Pharmaceutiques, Maisons-Alfort, France (Pascal, Bilbault, Cordonnier, Reyes-Gomez)
- Université Paris-Est, Ecole Nationale Vétérinaire d’Alfort, UMR BIPAR, ANSES, INRA, Maisons-Alfort, France (Boschiroli)
- Pathology Department, Oniris-Ecole Nationale Vétérinaire, Agroalimentaire et de l’Alimentation, Nantes, France (Dagher)
| | - Héloïse Bilbault
- Héloïse Bilbault, Université Paris-Est, Ecole Nationale Vétérinaire d’Alfort, Biopôle, Unité d’Histologie, d’Embryologie et d’Anatomie pathologique, Département des Sciences Biologiques et Pharmaceutiques, 7 rue du General de Gaulle, 94700, Maisons-Alfort, France.
| | - Elie Dagher
- LHA-Laboniris, Oniris-Ecole Nationale Vétérinaire, Agroalimentaire et de l’Alimentation Nantes, France (Dequéant)
- Université Paris-Est, Ecole Nationale Vétérinaire d’Alfort, Biopôle, Unité d’Histologie, d’Embryologie et d’Anatomie pathologique, Département des Sciences Biologiques et Pharmaceutiques, Maisons-Alfort, France (Pascal, Bilbault, Cordonnier, Reyes-Gomez)
- Université Paris-Est, Ecole Nationale Vétérinaire d’Alfort, UMR BIPAR, ANSES, INRA, Maisons-Alfort, France (Boschiroli)
- Pathology Department, Oniris-Ecole Nationale Vétérinaire, Agroalimentaire et de l’Alimentation, Nantes, France (Dagher)
| | - Maria-Laura Boschiroli
- LHA-Laboniris, Oniris-Ecole Nationale Vétérinaire, Agroalimentaire et de l’Alimentation Nantes, France (Dequéant)
- Université Paris-Est, Ecole Nationale Vétérinaire d’Alfort, Biopôle, Unité d’Histologie, d’Embryologie et d’Anatomie pathologique, Département des Sciences Biologiques et Pharmaceutiques, Maisons-Alfort, France (Pascal, Bilbault, Cordonnier, Reyes-Gomez)
- Université Paris-Est, Ecole Nationale Vétérinaire d’Alfort, UMR BIPAR, ANSES, INRA, Maisons-Alfort, France (Boschiroli)
- Pathology Department, Oniris-Ecole Nationale Vétérinaire, Agroalimentaire et de l’Alimentation, Nantes, France (Dagher)
| | - Nathalie Cordonnier
- LHA-Laboniris, Oniris-Ecole Nationale Vétérinaire, Agroalimentaire et de l’Alimentation Nantes, France (Dequéant)
- Université Paris-Est, Ecole Nationale Vétérinaire d’Alfort, Biopôle, Unité d’Histologie, d’Embryologie et d’Anatomie pathologique, Département des Sciences Biologiques et Pharmaceutiques, Maisons-Alfort, France (Pascal, Bilbault, Cordonnier, Reyes-Gomez)
- Université Paris-Est, Ecole Nationale Vétérinaire d’Alfort, UMR BIPAR, ANSES, INRA, Maisons-Alfort, France (Boschiroli)
- Pathology Department, Oniris-Ecole Nationale Vétérinaire, Agroalimentaire et de l’Alimentation, Nantes, France (Dagher)
| | - Edouard Reyes-Gomez
- LHA-Laboniris, Oniris-Ecole Nationale Vétérinaire, Agroalimentaire et de l’Alimentation Nantes, France (Dequéant)
- Université Paris-Est, Ecole Nationale Vétérinaire d’Alfort, Biopôle, Unité d’Histologie, d’Embryologie et d’Anatomie pathologique, Département des Sciences Biologiques et Pharmaceutiques, Maisons-Alfort, France (Pascal, Bilbault, Cordonnier, Reyes-Gomez)
- Université Paris-Est, Ecole Nationale Vétérinaire d’Alfort, UMR BIPAR, ANSES, INRA, Maisons-Alfort, France (Boschiroli)
- Pathology Department, Oniris-Ecole Nationale Vétérinaire, Agroalimentaire et de l’Alimentation, Nantes, France (Dagher)
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Diarra B, Kone M, Togo ACG, Sarro YDS, Cisse AB, Somboro A, Degoga B, Tolofoudie M, Kone B, Sanogo M, Baya B, Kodio O, Maiga M, Belson M, Orsega S, Krit M, Dao S, Maiga II, Murphy RL, Rigouts L, Doumbia S, Diallo S, de Jong BC. Mycobacterium africanum (Lineage 6) shows slower sputum smear conversion on tuberculosis treatment than Mycobacterium tuberculosis (Lineage 4) in Bamako, Mali. PLoS One 2018; 13:e0208603. [PMID: 30540823 PMCID: PMC6291124 DOI: 10.1371/journal.pone.0208603] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Accepted: 11/20/2018] [Indexed: 11/19/2022] Open
Abstract
Objective Ancestral M. tuberculosis complex lineages such as M. africanum are underrepresented among retreatment patients and those with drug resistance. To test the hypothesis that they respond faster to TB treatment, we determined the rate of smear conversion of new pulmonary tuberculosis patients in Bamako, Mali by the main MTBc lineages. Methods Between 2015 and 2017, we conducted a prospective cohort study of new smear positive pulmonary tuberculosis patients in Bamako. Confirmed MTBc isolates underwent genotyping by spoligotyping for lineage classification. Patients were followed at 1 month (M), 2M and 5M to measure smear conversion in auramine (AR) and Fluorescein DiAcetate (FDA) vital stain microscopy. Result All the first six human MTBc lineages were represented in the population, plus M. bovis in 0.8% of the patients. The most widely represented lineage was the modern Euro-American lineage (L) 4, 57%, predominantly the T family, followed by L6 (M. africanum type 2) in 22.9%. Ancestral lineages 1, 5, 6 and M. bovis combined amounted to 28.8%. Excluding 25 patients with rifampicin resistance, smear conversion, both by AR and FDA, occurred later in L6 compared to L4 (HR 0.80 (95% CI 0.66–0.97) for AR, and HR 0.81 (95%CI 0.68–0.97) for FDA). In addition we found that HIV negative status, higher BMI at day 0, and patients with smear grade at baseline ≤ 1+ were associated with earlier smear conversion. Conclusion The six major human lineages of the MTBc all circulate in Bamako. Counter to our hypothesis, we found that patients diseased with modern M. tuberculosis complex L4 respond faster to TB treatment than those with M. africanum L6.
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Affiliation(s)
- Bassirou Diarra
- University Clinical Research Center (UCRC)-SEREFO-Laboratory, University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
- Institute of Tropical Medicine, Department of Biomedical Sciences, Antwerp, Belgium
- Department of Biomedical Sciences, Antwerp University, Antwerp, Belgium
- * E-mail:
| | - Mahamadou Kone
- University Clinical Research Center (UCRC)-SEREFO-Laboratory, University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Antieme Combo Georges Togo
- University Clinical Research Center (UCRC)-SEREFO-Laboratory, University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Yeya dit Sadio Sarro
- University Clinical Research Center (UCRC)-SEREFO-Laboratory, University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Aissata Boubakar Cisse
- Laboratoire National de Référence des Mycobactéries (LNR), Institut National de Recherche en Santé publique (INRSP), Bamako, Mali
| | - Amadou Somboro
- University Clinical Research Center (UCRC)-SEREFO-Laboratory, University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Boureima Degoga
- University Clinical Research Center (UCRC)-SEREFO-Laboratory, University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Mohamed Tolofoudie
- University Clinical Research Center (UCRC)-SEREFO-Laboratory, University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Bourahima Kone
- University Clinical Research Center (UCRC)-SEREFO-Laboratory, University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Moumine Sanogo
- University Clinical Research Center (UCRC)-SEREFO-Laboratory, University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Bocar Baya
- University Clinical Research Center (UCRC)-SEREFO-Laboratory, University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Ousmane Kodio
- University Clinical Research Center (UCRC)-SEREFO-Laboratory, University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Mamoudou Maiga
- Global Health, Northwestern University, Chicago, IL, United States of America
| | - Michael Belson
- Collaborative Clinical Research Branch, Division of Clinical Research, National Institute of Allergy and Infectious Diseases, Bethesda, Maryland, United States of America
| | - Susan Orsega
- Collaborative Clinical Research Branch, Division of Clinical Research, National Institute of Allergy and Infectious Diseases, Bethesda, Maryland, United States of America
| | - Meryam Krit
- Institute of Tropical Medicine, Department of Biomedical Sciences, Antwerp, Belgium
| | - Sounkalo Dao
- University Clinical Research Center (UCRC)-SEREFO-Laboratory, University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Ibrahim Izétiegouma Maiga
- Laboratoire d’analyses Médicales et Hygiène Hospitalière du Centre Hospitalier Universitaire du Point-G, Bamako, Mali
| | - Robert L. Murphy
- Global Health, Northwestern University, Chicago, IL, United States of America
| | - Leen Rigouts
- Institute of Tropical Medicine, Department of Biomedical Sciences, Antwerp, Belgium
- Department of Biomedical Sciences, Antwerp University, Antwerp, Belgium
| | - Seydou Doumbia
- University Clinical Research Center (UCRC)-SEREFO-Laboratory, University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Souleymane Diallo
- University Clinical Research Center (UCRC)-SEREFO-Laboratory, University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
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Michelet L, de Cruz K, Karoui C, Tambosco J, Moyen JL, Hénault S, Boschiroli ML. Second line molecular diagnosis for bovine tuberculosis to improve diagnostic schemes. PLoS One 2018; 13:e0207614. [PMID: 30475835 PMCID: PMC6261039 DOI: 10.1371/journal.pone.0207614] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Accepted: 11/02/2018] [Indexed: 12/29/2022] Open
Abstract
Surveillance of bovine tuberculosis (bTB) is partly based on the sanitary inspection of carcasses at the abattoir to detect bTB-like lesions which, in compliance with EU recommendations, are analysed by bacteriology and histopathology to disclose Mycobacterium bovis (or M. caprae) infection. Moreover, since 2012, a PCR method with similar sensitivity and specificity values of histopathology and bacteriology respectively is additionally employed in France, partially compensating for the weaknesses of classical diagnostic methods. We analysed a collection of bTB-like lesions from cattle presenting positive histological results albeit with negative PCR results. We present here the results of these samples, recovered from 292 animals culled between 2013 and 2016, analysed with a second line molecular diagnosis approach that consists in a combination of PCRs targeting the M. tuberculosis-M. avium complexes as well as the Mycobacterium genus and sequencing of hsp65 gene. These molecular analyses disclosed to identify the presence of non-tuberculous bacteria which could be responsible for most of these non-specific TB lesions: non tuberculous mycobacteria (24%) or Actinomycetales (56%) such as Rhodococcus equi (53%); 24% of the samples were negative. M. bovis -or any other MTBC members- was neither detected by molecular methods nor isolated in any of them at the end of the 3 months of culture. In conclusion, these results highlight the lack of specificity of histopathology and the usefulness of a first line PCR with a second line molecular diagnostic test to circumvent it. This diagnostic strategy makes it possible to reduce the number of suspect bTB cases raised at the abattoir or shortening their lock-up periods. By simplifying diagnostic schemes, the use of this tool could improve bTB surveillance and make eradication programs more efficient in the future.
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Affiliation(s)
- Lorraine Michelet
- University Paris-Est, French Agency for Food, Environmental and Occupational Health and Safety (Anses), Laboratory for Animal Health, Maisons-Alfort, France
| | - Krystel de Cruz
- University Paris-Est, French Agency for Food, Environmental and Occupational Health and Safety (Anses), Laboratory for Animal Health, Maisons-Alfort, France
| | - Claudine Karoui
- University Paris-Est, French Agency for Food, Environmental and Occupational Health and Safety (Anses), Laboratory for Animal Health, Maisons-Alfort, France
| | - Jennifer Tambosco
- University Paris-Est, French Agency for Food, Environmental and Occupational Health and Safety (Anses), Laboratory for Animal Health, Maisons-Alfort, France
| | - Jean-Louis Moyen
- Laboratoire Départemental d'Analyse et de Recherche de Dordogne, Coulounieix Chamiers, France
| | - Sylvie Hénault
- University Paris-Est, French Agency for Food, Environmental and Occupational Health and Safety (Anses), Laboratory for Animal Health, Maisons-Alfort, France
| | - María Laura Boschiroli
- University Paris-Est, French Agency for Food, Environmental and Occupational Health and Safety (Anses), Laboratory for Animal Health, Maisons-Alfort, France
- * E-mail:
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O'Halloran C, McCulloch L, Rentoul L, Alexander J, Hope JC, Gunn-Moore DA. Cytokine and Chemokine Concentrations as Biomarkers of Feline Mycobacteriosis. Sci Rep 2018; 8:17314. [PMID: 30470763 PMCID: PMC6251861 DOI: 10.1038/s41598-018-35571-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Accepted: 11/02/2018] [Indexed: 12/16/2022] Open
Abstract
Mycobacteriosis is an emerging zoonotic disease of domestic cats and timely, accurate diagnosis is currently challenging. To identify differential cytokine/chemokine concentrations in serum/plasma of cats, which could be diagnostic biomarkers of infection we analysed plasma/serum from 116 mycobacteria-infected cats, 16 healthy controls and six cats hospitalised for unrelated reasons was analysed using the Milliplex MAP Feline Cytokine Magnetic Bead multiplex assay. Three cytokines; sFAS, IL-13 and IL-4 were reduced while seven; GM-CSF, IL-2, PDGF-BB, IL-8, KC, RANTES and TNF-α were elevated in mycobacteria-infected cats compared to healthy controls. However, IL-8 and KC concentrations were not significantly different from cats hospitalised for other reasons. Elevations in TNF-α and PDGF-BB may have potential to identify M. bovis and M. microti infected cats specifically while GM-CSF, IL-2 and FLT3L were increased in MTBC infected cats. This study demonstrates potential use of feline tuberculosis as a spontaneously occurring model of this significant human disease. Cytokine profiling has clear diagnostic potential for mycobacteriosis of cats and could be used discriminate tuberculous from non-tuberculous disease to rapidly inform on zoonotic risk. Future work should focus on the in-field utility of these findings to establish diagnostic sensitivity and specificity of these markers.
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Affiliation(s)
- C O'Halloran
- Royal (Dick) School of Veterinary Studies and The Roslin Institute, University of Edinburgh, Easter Bush Campus, Edinburgh, Scotland, EH25 9RG, UK. conor.o'
| | - L McCulloch
- UK Dementia Research Institute, Edinburgh Medical School, University of Edinburgh, Edinburgh, Scotland, EH16 4SB, UK
| | - L Rentoul
- MilliporeSigma (a Division of Merck KGaA, Darmstadt, Germany), 3050, Spruce Street, St. Louis, MO, USA
| | - J Alexander
- Waltham Centre for Pet Nutrition, Leicestershire, UK
| | - J C Hope
- Royal (Dick) School of Veterinary Studies and The Roslin Institute, University of Edinburgh, Easter Bush Campus, Edinburgh, Scotland, EH25 9RG, UK
| | - D A Gunn-Moore
- Royal (Dick) School of Veterinary Studies and The Roslin Institute, University of Edinburgh, Easter Bush Campus, Edinburgh, Scotland, EH25 9RG, UK
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Oiwa T, Murata T, Honda T, Nakano S, Kabashima K. A Case of Subcutaneous Infection with Mycobacterium mageritense Identified by Matrix-assisted Laser Desorption/Ionization-time of Flight Mass Spectrometry. Acta Derm Venereol 2018; 98:987-988. [PMID: 29978886 DOI: 10.2340/00015555-3005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
- Tomohiro Oiwa
- Department of Dermatology, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawahara, Sakyo, 606-8507 Kyoto, Japan
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Costa-Silva M, César A, Nuno PG, Azavedo F. Mycobacterium abscessus infection in a spa worker. Acta Dermatovenerol Alp Pannonica Adriat 2018; 27:159-160. [PMID: 30244269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Mycobacterium abscessus (M. abscessus) is a non-tuberculous mycobacterium widely present in the natural environment and is now being increasingly identified as a cause of human disease. However, it can cause skin and soft tissue infection following trauma or surgery. We report a case of a skin ulcer associated with M. abscessus in a spa worker. Frequently, contamination with atypical mycobacteria occurs through tap water. However, in most outbreaks the infection source remains unknown. For an early diagnosis, it is important to perform biopsies and mycobacterium cultures. No specific treatment for skin infection with M. abscessus has been established; it depends on the immune status of the host and the extent of disease. Although it is rare, non-tuberculous mycobacterial infection should be part of the differential diagnosis of cutaneous ulcers, especially on trauma-prone areas.
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Affiliation(s)
- Miguel Costa-Silva
- Department of Dermatology and Venereology, Centro Hospitalar São João, EPE, Porto, Portugal
| | - Artur César
- Department of Dermatology and Venereology, Centro Hospitalar São João, EPE, Porto, Portugal
| | - Preto Gomes Nuno
- Department of Dermatology and Venereology, Centro Hospitalar São João, EPE, Porto, Portugal
| | - Filomena Azavedo
- Department of Dermatology and Venereology, Centro Hospitalar São João, EPE, Porto, Portugal
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Ates LS, Dippenaar A, Sayes F, Pawlik A, Bouchier C, Ma L, Warren RM, Sougakoff W, Majlessi L, van Heijst JWJ, Brossier F, Brosch R. Unexpected Genomic and Phenotypic Diversity of Mycobacterium africanum Lineage 5 Affects Drug Resistance, Protein Secretion, and Immunogenicity. Genome Biol Evol 2018; 10:1858-1874. [PMID: 30010947 PMCID: PMC6071665 DOI: 10.1093/gbe/evy145] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/10/2018] [Indexed: 01/19/2023] Open
Abstract
Mycobacterium africanum consists of Lineages L5 and L6 of the Mycobacterium tuberculosis complex (MTBC) and causes human tuberculosis in specific regions of Western Africa, but is generally not transmitted in other parts of the world. Since M. africanum is evolutionarily closely placed between the globally dispersed Mycobacterium tuberculosis and animal-adapted MTBC-members, these lineages provide valuable insight into M. tuberculosis evolution. Here, we have collected 15 M. africanum L5 strains isolated in France over 4 decades. Illumina sequencing and phylogenomic analysis revealed a previously underappreciated diversity within L5, which consists of distinct sublineages. L5 strains caused relatively high levels of extrapulmonary tuberculosis and included multi- and extensively drug-resistant isolates, especially in the newly defined sublineage L5.2. The specific L5 sublineages also exhibit distinct phenotypic characteristics related to in vitro growth, protein secretion and in vivo immunogenicity. In particular, we identified a PE_PGRS and PPE-MPTR secretion defect specific for sublineage L5.2, which was independent of PPE38. Furthermore, L5 isolates were able to efficiently secrete and induce immune responses against ESX-1 substrates contrary to previous predictions. These phenotypes of Type VII protein secretion and immunogenicity provide valuable information to better link genome sequences to phenotypic traits and thereby understand the evolution of the MTBC.
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Affiliation(s)
- Louis S Ates
- Department of Genomes and Genetics, Institut Pasteur, Unit for Integrated Mycobacterial Pathogenomics, CNRS UMR3525, Paris, France
- Department of Experimental Immunology, Amsterdam UMC, University of Amsterdam, Amsterdam Infection & Immunity Institute, Amsterdam, The Netherlands
| | - Anzaan Dippenaar
- DST-NRF Centre of Excellence for Biomedical Tuberculosis Research; South African Medical Research Council Centre for Tuberculosis Research; Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa
| | - Fadel Sayes
- Department of Genomes and Genetics, Institut Pasteur, Unit for Integrated Mycobacterial Pathogenomics, CNRS UMR3525, Paris, France
| | - Alexandre Pawlik
- Department of Genomes and Genetics, Institut Pasteur, Unit for Integrated Mycobacterial Pathogenomics, CNRS UMR3525, Paris, France
| | - Christiane Bouchier
- Department of Genomes and Genetics, Institut Pasteur, Genomics Platform, Paris, France
| | - Laurence Ma
- Department of Genomes and Genetics, Institut Pasteur, Genomics Platform, Paris, France
| | - Robin M Warren
- DST-NRF Centre of Excellence for Biomedical Tuberculosis Research; South African Medical Research Council Centre for Tuberculosis Research; Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa
| | - Wladimir Sougakoff
- Sorbonne Universités, INSERM, Centre d'Immunologie et des Maladies Infectieuses, CIMI-Paris, Team 13 (Bacteriology), Paris, France
- Laboratoire de Bactériologie-Hygiène, Centre National de Référence des Mycobactéries (NRC MyRMA), Hôpitaux Universitaires Pitié-Salpêtrière – Charles Foix, Paris, France
| | - Laleh Majlessi
- Department of Genomes and Genetics, Institut Pasteur, Unit for Integrated Mycobacterial Pathogenomics, CNRS UMR3525, Paris, France
| | - Jeroen W J van Heijst
- Department of Experimental Immunology, Amsterdam UMC, University of Amsterdam, Amsterdam Infection & Immunity Institute, Amsterdam, The Netherlands
| | - Florence Brossier
- Department of Genomes and Genetics, Institut Pasteur, Unit for Integrated Mycobacterial Pathogenomics, CNRS UMR3525, Paris, France
- Sorbonne Universités, INSERM, Centre d'Immunologie et des Maladies Infectieuses, CIMI-Paris, Team 13 (Bacteriology), Paris, France
- Laboratoire de Bactériologie-Hygiène, Centre National de Référence des Mycobactéries (NRC MyRMA), Hôpitaux Universitaires Pitié-Salpêtrière – Charles Foix, Paris, France
| | - Roland Brosch
- Department of Genomes and Genetics, Institut Pasteur, Unit for Integrated Mycobacterial Pathogenomics, CNRS UMR3525, Paris, France
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Otchere ID, Coscollá M, Sánchez-Busó L, Asante-Poku A, Brites D, Loiseau C, Meehan C, Osei-Wusu S, Forson A, Laryea C, Yahayah AI, Baddoo A, Ansa GA, Aboagye SY, Asare P, Borrell S, Gehre F, Beckert P, Kohl TA, N'dira S, Beisel C, Antonio M, Niemann S, de Jong BC, Parkhill J, Harris SR, Gagneux S, Yeboah-Manu D. Comparative genomics of Mycobacterium africanum Lineage 5 and Lineage 6 from Ghana suggests distinct ecological niches. Sci Rep 2018; 8:11269. [PMID: 30050166 PMCID: PMC6062541 DOI: 10.1038/s41598-018-29620-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Accepted: 07/16/2018] [Indexed: 11/09/2022] Open
Abstract
Mycobacterium africanum (Maf) causes a substantial proportion of human tuberculosis in some countries of West Africa, but little is known on this pathogen. We compared the genomes of 253 Maf clinical isolates from Ghana, including N = 175 Lineage 5 (L5) and N = 78 Lineage 6 (L6). We found that the genomic diversity of L6 was higher than in L5 despite the smaller sample size. Regulatory proteins appeared to evolve neutrally in L5 but under purifying selection in L6. Even though over 90% of the human T cell epitopes were conserved in both lineages, L6 showed a higher ratio of non-synonymous to synonymous single nucleotide variation in these epitopes overall compared to L5. Of the 10% human T cell epitopes that were variable, most carried mutations that were lineage-specific. Our findings indicate that Maf L5 and L6 differ in some of their population genomic characteristics, possibly reflecting different selection pressures linked to distinct ecological niches.
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Affiliation(s)
- Isaac Darko Otchere
- Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Accra, Ghana
- Department of Biochemistry, Cell and Molecular Biology, University of Ghana, Legon, Accra, Ghana
| | - Mireia Coscollá
- Swiss Tropical and Public Health Institute, Basel, Switzerland
- University of Basel, Basel, Switzerland
| | - Leonor Sánchez-Busó
- Wellcome Trust Sanger Institute, University of Cambridge, Hinxton, United Kingdom
| | - Adwoa Asante-Poku
- Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Accra, Ghana
| | - Daniela Brites
- Swiss Tropical and Public Health Institute, Basel, Switzerland
- University of Basel, Basel, Switzerland
| | - Chloe Loiseau
- Swiss Tropical and Public Health Institute, Basel, Switzerland
- University of Basel, Basel, Switzerland
| | - Conor Meehan
- Institute of Tropical Medicine, Antwerp, Belgium
| | - Stephen Osei-Wusu
- Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Accra, Ghana
| | - Audrey Forson
- Chest Clinic, Korle-Bu Teaching Hospital, Accra, Ghana
| | | | | | - Akosua Baddoo
- Chest Clinic, Korle-Bu Teaching Hospital, Accra, Ghana
| | - Gloria Akosua Ansa
- Public Health Department, University of Ghana Hospital, Legon, Accra, Ghana
| | - Samuel Yaw Aboagye
- Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Accra, Ghana
| | - Prince Asare
- Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Accra, Ghana
| | - Sonia Borrell
- Swiss Tropical and Public Health Institute, Basel, Switzerland
- University of Basel, Basel, Switzerland
| | - Florian Gehre
- Institute of Tropical Medicine, Antwerp, Belgium
- Medical Research Council Unit The Gambia at The London School of Hygiene and Tropical Medicine, Banjul, The Gambia
| | - Patrick Beckert
- Molecular and Experimental Mycobacteriology, Research Center Borstel, Borstel, Germany
- German Center for Infection Research, Partner Site Hamburg-Borstel-Lübeck, Lübeck, Germany
| | - Thomas A Kohl
- Molecular and Experimental Mycobacteriology, Research Center Borstel, Borstel, Germany
- German Center for Infection Research, Partner Site Hamburg-Borstel-Lübeck, Lübeck, Germany
| | - Sanoussi N'dira
- National Reference Laboratory for Mycobacteria, Cotonou, Benin
| | - Christian Beisel
- Department of Biosystems Science and Engineering, ETH Zurich, Basel, Switzerland
| | - Martin Antonio
- Medical Research Council Unit The Gambia at The London School of Hygiene and Tropical Medicine, Banjul, The Gambia
- Division of Microbiology & Immunity, Warwick Medical School, University of Warwick, Coventry, CV4 7AL, UK
| | - Stefan Niemann
- Molecular and Experimental Mycobacteriology, Research Center Borstel, Borstel, Germany
- German Center for Infection Research, Partner Site Hamburg-Borstel-Lübeck, Lübeck, Germany
| | - Bouke C de Jong
- Institute of Tropical Medicine, Antwerp, Belgium
- Medical Research Council Unit The Gambia at The London School of Hygiene and Tropical Medicine, Banjul, The Gambia
| | - Julian Parkhill
- Wellcome Trust Sanger Institute, University of Cambridge, Hinxton, United Kingdom
| | - Simon R Harris
- Wellcome Trust Sanger Institute, University of Cambridge, Hinxton, United Kingdom
| | - Sebastien Gagneux
- Swiss Tropical and Public Health Institute, Basel, Switzerland.
- University of Basel, Basel, Switzerland.
| | - Dorothy Yeboah-Manu
- Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Accra, Ghana.
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Richards CL, Broadaway SC, Eggers MJ, Doyle J, Pyle BH, Camper AK, Ford TE. Detection of Pathogenic and Non-pathogenic Bacteria in Drinking Water and Associated Biofilms on the Crow Reservation, Montana, USA. Microb Ecol 2018; 76:52-63. [PMID: 25796498 PMCID: PMC9291231 DOI: 10.1007/s00248-015-0595-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2015] [Accepted: 03/06/2015] [Indexed: 05/14/2023]
Abstract
Private residences in rural areas with water systems that are not adequately regulated, monitored, and updated could have drinking water that poses a health risk. To investigate water quality on the Crow Reservation in Montana, water and biofilm samples were collected from 57 public buildings and private residences served by either treated municipal or individual groundwater well systems. Bacteriological quality was assessed including detection of fecal coliform bacteria and heterotrophic plate count (HPC) as well as three potentially pathogenic bacterial genera, Mycobacterium, Legionella, and Helicobacter. All three target genera were detected in drinking water systems on the Crow Reservation. Species detected included the opportunistic and frank pathogens Mycobacterium avium, Mycobacterium gordonae, Mycobacterium flavescens, Legionella pneumophila, and Helicobacter pylori. Additionally, there was an association between HPC bacteria and the presence of Mycobacterium and Legionella but not the presence of Helicobacter. This research has shown that groundwater and municipal drinking water systems on the Crow Reservation can harbor potential bacterial pathogens.
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Affiliation(s)
- Crystal L Richards
- Department of Biological and Physical Sciences, Montana State University Billings, Billings, MT, 59101, USA
| | - Susan C Broadaway
- Department of Microbiology and Center for Biofilm Engineering, Montana State University, Bozeman, MT, 59717, USA
| | - Margaret J Eggers
- Department of Microbiology and Center for Biofilm Engineering, Montana State University, Bozeman, MT, 59717, USA
| | - John Doyle
- Little Big Horn College, Crow Agency, MT, 59022, USA
- Apsaalooke Water and Wastewater Authority, Hardin, MT, 59034, USA
- Crow Tribal Member, Crow Agency, MT, 59022, USA
| | - Barry H Pyle
- Department of Microbiology and Center for Biofilm Engineering, Montana State University, Bozeman, MT, 59717, USA
| | - Anne K Camper
- Department of Civil Engineering and Center for Biofilm Engineering, Montana State University, Bozeman, MT, 59717, USA
| | - Timothy E Ford
- School of Health Professions, Shenandoah University, Winchester, VA, 22601, USA.
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Bouam A, Armstrong N, Levasseur A, Drancourt M. Mycobacterium terramassiliense, Mycobacterium rhizamassiliense and Mycobacterium numidiamassiliense sp. nov., three new Mycobacterium simiae complex species cultured from plant roots. Sci Rep 2018; 8:9309. [PMID: 29915369 PMCID: PMC6006331 DOI: 10.1038/s41598-018-27629-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Accepted: 06/05/2018] [Indexed: 12/04/2022] Open
Abstract
Three slowly growing mycobacteria named strain AB308, strain AB215 and strain AB57 were isolated from the tomato plant roots. The 16S rRNA and rpoB gene sequence analyses suggested that each strain was representative of one hitherto unidentified slowly-growing Mycobacterium species of the Mycobacterium simiae complex. Genome sequencing indicated that each strain contained one chromosome of 6.015-6.029 Mbp. A total of 1,197, 1,239 and 1,175 proteins were found to be associated with virulence and 107, 76 and 82 proteins were associated with toxin/antitoxin systems for strains AB308, AB215 and AB57, respectively. The three genomes encode for secondary metabolites, with 38, 33 and 46 genes found to be associated with polyketide synthases/non-ribosomal peptide synthases and nine, seven and ten genes encoding for bacteriocins, respectively. The genome of strain AB308 encodes for one questionable prophage and three incomplete prophages, while only incomplete prophages were predicted in AB215 and AB57 genomes. Genetic and genomic data indicate that strains AB308, AB215 and AB57 are each representative of a new Mycobacterium species that we respectively named Mycobacterium terramassiliense, Mycobacterium numidiamassiliense and Mycobacterium rhizamassiliense.
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Affiliation(s)
- A Bouam
- Aix-Marseille Univ, IRD, MEPHI, IHU Méditerranée-Infection, Marseille, France
| | - N Armstrong
- Aix-Marseille Univ, IRD, MEPHI, IHU Méditerranée-Infection, Marseille, France
| | - A Levasseur
- Aix-Marseille Univ, IRD, MEPHI, IHU Méditerranée-Infection, Marseille, France
| | - M Drancourt
- Aix-Marseille Univ, IRD, MEPHI, IHU Méditerranée-Infection, Marseille, France.
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Virk A, Pritt B, Patel R, Uhl JR, Bezalel SA, Gibson LE, Stryjewska BM, Peters MS. Mycobacterium lepromatosis Lepromatous Leprosy in US Citizen Who Traveled to Disease-Endemic Areas. Emerg Infect Dis 2018; 23:1864-1866. [PMID: 29048278 PMCID: PMC5652441 DOI: 10.3201/eid2311.171104] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
We report Mycobacterium lepromatosis infection in a US-born person with an extensive international travel history. Clinical symptoms, histopathology, and management are similar to those of infections caused by M. leprae. Clinicians should consider this pathogen in the diagnosis of patients with symptoms of leprosy who have traveled to endemic areas.
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Marcos LA, Spitzer ED, Mahapatra R, Ma Y, Halse TA, Shea J, Isabelle M, Lapierre P, Escuyer VE. Mycobacterium orygis Lymphadenitis in New York, USA. Emerg Infect Dis 2018; 23:1749-1751. [PMID: 28930016 PMCID: PMC5621560 DOI: 10.3201/eid2310.170490] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
We report a case of lymphadenitis caused by Mycobacterium orygis in an immunocompetent person in Stony Brook, New York, USA. Initial real-time PCR assay failed to provide a final subspecies identification within the M. tuberculosis complex, but whole-genome sequencing characterized the isolate as M. orygis.
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Schmitz A, Korbel R, Thiel S, Wörle B, Gohl C, Rinder M. High prevalence of Mycobacterium genavense within flocks of pet birds. Vet Microbiol 2018; 218:40-44. [PMID: 29685219 DOI: 10.1016/j.vetmic.2018.03.026] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Revised: 03/20/2018] [Accepted: 03/20/2018] [Indexed: 11/18/2022]
Abstract
Mycobacterium genavense is regarded as the primary cause of mycobacteriosis in psittaciform and passeriform birds, which are commonly kept as pets. In humans, Mycobacterium genavense is especially pathogenic for young, old, pregnant and immunocompromised people (YOPIs). In birds, only few studies, mainly case reports, exist and there is still little e information about occurrence and relevance of this zoonotic pathogen. In this first pilot study concerning the prevalence of Mycobacterium genavense within flocks of naturally infected pet birds, real-time PCR examinations of 170 individual passeriform and psittaciform birds, including commonly kept budgerigars, lovebirds and zebra finches as well as gold finches and weaver finches, were conducted to determine the infection rate in six different aviaries. Antemortem examinations of faeces and cloacal swabs were compared with postmortem examinations of tissue samples to evaluate the reliability of antemortem diagnostics. Additional ophthalmologic examinations were performed to evaluate their diagnostic potential. Molecular examinations for viral co-infections, including circovirus, polyomavirus and adenovirus, were conducted to identify potential risk factors. PCR results revealed a detection prevalence of Mycobacterium genavense in the flocks varying from 3% to 91% based on postmortem testing, while antemortem diagnostics of faecal samples and swabs showed 64% discrepant (false negative) results. Ophthalmologic examinations were not useful in identifying infected birds within the flocks. Viral co-infections, especially with polyomavirus, were common. It has to be assumed that Mycobacterium genavense infections are widespread and underdiagnosed in companion birds. Viral infections might be an important risk factor. There is urgent need to improve antemortem diagnostics.
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Affiliation(s)
- A Schmitz
- Centre for Clinical Veterinary Medicine, Clinic for Birds, Small Mammals, Reptiles and Ornamental Fish, Ludwig-Maximilians-Universität München, Sonnenstr. 18, 85476, Oberschleißheim, Germany.
| | - R Korbel
- Centre for Clinical Veterinary Medicine, Clinic for Birds, Small Mammals, Reptiles and Ornamental Fish, Ludwig-Maximilians-Universität München, Sonnenstr. 18, 85476, Oberschleißheim, Germany
| | - S Thiel
- Centre for Clinical Veterinary Medicine, Clinic for Birds, Small Mammals, Reptiles and Ornamental Fish, Ludwig-Maximilians-Universität München, Sonnenstr. 18, 85476, Oberschleißheim, Germany
| | - B Wörle
- Max Planck Institute for Ornithology, Eberhard-Gwinner-Straße 5, 82319, Seewiesen (Starnberg), Germany
| | - C Gohl
- Tierpark Hellabrunn, Tierparkstraße 30, 81543, München, Germany
| | - M Rinder
- Centre for Clinical Veterinary Medicine, Clinic for Birds, Small Mammals, Reptiles and Ornamental Fish, Ludwig-Maximilians-Universität München, Sonnenstr. 18, 85476, Oberschleißheim, Germany
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Abstract
Shower hoses offer an excellent bacterial growth environment in close proximity to a critical end-user exposure route within building drinking water plumbing. However, the health risks associated with and processes underlying the development of biofilms in shower hoses are poorly studied. In a global survey, biofilms from 78 shower hoses from 11 countries were characterized in terms of cell concentration (4.1 × 104-5.8 × 108 cells/cm2), metal accumulation (including iron, lead, and copper), and microbiome composition (including presence of potential opportunistic pathogens). In countries using disinfectant, biofilms had on average lower cell concentrations and diversity. Metal accumulation (up to 5 μg-Fe/cm2, 75 ng-Pb/cm2, and 460 ng-Cu/cm2) seemed to be partially responsible for discoloration in biofilms, and likely originated from other pipes upstream in the building. While some genera that may contain potential opportunistic pathogens (Legionella, detected in 21/78 shower hoses) were positively correlated with biofilm cell concentration, others (Mycobacterium, Pseudomonas) had surprisingly non-existent or negative correlations with biofilm cell concentrations. In a controlled study, 15 identical shower hoses were installed for the same time period in the same country, and both stagnant and flowing water samples were collected. Ecological theory of dispersal and selection helped to explain microbiome composition and diversity of different sample types. Shower hose age was related to metal accumulation but not biofilm cell concentration, while frequency of use appeared to influence biofilm cell concentration. This study shows that shower hose biofilms are clearly a critical element of building drinking water plumbing, and a potential target for building drinking water plumbing monitoring.
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Affiliation(s)
- Caitlin R Proctor
- Department of Environmental Microbiology, Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland; Department of Environmental Systems Science, Institute of Biogeochemistry and Pollutant Dynamics, ETH Zürich, Zürich, Switzerland
| | - Mauro Reimann
- Department of Environmental Systems Science, Institute of Biogeochemistry and Pollutant Dynamics, ETH Zürich, Zürich, Switzerland
| | - Bas Vriens
- Department of Water Resources and Drinking Water, Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland
| | - Frederik Hammes
- Department of Environmental Microbiology, Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland.
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Nouioui I, Carro L, Sangal V, Jando M, Igual JM, Goodfellow M, Klenk HP. Formal description of Mycobacterium neglectum sp. nov. and Mycobacterium palauense sp. nov., rapidly growing actinobacteria. Antonie Van Leeuwenhoek 2018; 111:1209-1223. [PMID: 29404824 DOI: 10.1007/s10482-018-1029-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2017] [Accepted: 01/25/2018] [Indexed: 02/05/2023]
Abstract
The taxonomic positions of two fast growing mycobacteria (CECT 8778T and CECT 8779T) were established using a polyphasic approach. The strains were shown to have chemotaxonomic, cultural and morphological properties consistent with their classification in the genus Mycobacterium. Multi-locus sequence analyses (MLSA) show that strain CECT 8778T forms a well-supported clade together with the type strains of Mycobacterium aurum, Mycobacterium austroafricanum and Mycobacterium vanbaalenii while strain CECT 8779T presents as a distinct branch that is well separated from its near phylogenetic neighbours; it is also apparent from the MLSA genetic distances that these strains are most closely related to the type strains of Mycobacterium mageritense and M. vanbaalenii, respectively. Digital DNA:DNA hybridization and average nucleotide identity values between each of the strains and its close phylogenetic neighbour are below the 70 and 96% threshold values for definition of prokaryotic species; these results are underpinned by corresponding phenotypic data. Based upon the consensus of the phenotypic and phylogenetic analyses, it can be concluded that the two strains represent novel species within the genus Mycobacterium for which the following names are proposed: Mycobacterium neglectum sp. nov., with the type strain CECT 8778T (BN 3150T = DSM 44756T) and Mycobacterium palauense sp. nov., with the type strain CECT 8779T (= DSM 44914T).
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Affiliation(s)
- Imen Nouioui
- School of Natural and Environmental Sciences, Newcastle University, Ridley Building, Newcastle upon Tyne, NE1 7RU, UK.
| | - Lorena Carro
- School of Natural and Environmental Sciences, Newcastle University, Ridley Building, Newcastle upon Tyne, NE1 7RU, UK
| | - Vartul Sangal
- Faculty of Health and Life Sciences, Northumbria University, Newcastle upon Tyne, NE1 8ST, UK
| | - Marlen Jando
- Leibniz Institute DSMZ - German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B, 38124, Brunswick, Germany
| | - José Mariano Igual
- Instituto de Recursos Naturales y Agrobiología de Salamanca, Consejo Superior de Investigaciones Científicas (IRNASA-CSIC), c/Cordel de Merinas 40-52, 37008, Salamanca, Spain
| | - Michael Goodfellow
- School of Natural and Environmental Sciences, Newcastle University, Ridley Building, Newcastle upon Tyne, NE1 7RU, UK
| | - Hans-Peter Klenk
- School of Natural and Environmental Sciences, Newcastle University, Ridley Building, Newcastle upon Tyne, NE1 7RU, UK
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Schreiber PW, Kuster SP, Hasse B, Bayard C, Rüegg C, Kohler P, Keller PM, Bloemberg GV, Maisano F, Bettex D, Halbe M, Sommerstein R, Sax H. Reemergence of Mycobacterium chimaera in Heater-Cooler Units despite Intensified Cleaning and Disinfection Protocol. Emerg Infect Dis 2018; 22:1830-3. [PMID: 27649345 PMCID: PMC5038437 DOI: 10.3201/eid2210.160925] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Invasive Mycobacterium chimaera infections after open-heart surgery have been reported internationally. These devastating infections result from aerosols generated by contaminated heater–cooler units used with extracorporeal circulation during surgery. Despite intensified cleaning and disinfection, surveillance samples from factory-new units acquired during 2014 grew nontuberculous mycobacteria after a median of 174 days.
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