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Extrapulmonary Nontuberculous Mycobacterial Infections in Southern Arizona

BACKGROUND: Nontuberculous mycobacteria (NTM) are a diverse group of environmental mycobacteria which cause a wide range of pathology, from lung disease to skin and soft tissue (SST) infections and disseminated disease, mostly in immunocompromised individuals. The antimicrobial susceptibility is var...

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Autores principales: Florita, Catalin, Zangeneh, Tirdad, Georgescu, Anca
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Oxford University Press 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5630735/
http://dx.doi.org/10.1093/ofid/ofx163.1789
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author Florita, Catalin
Zangeneh, Tirdad
Georgescu, Anca
author_facet Florita, Catalin
Zangeneh, Tirdad
Georgescu, Anca
author_sort Florita, Catalin
collection PubMed
description BACKGROUND: Nontuberculous mycobacteria (NTM) are a diverse group of environmental mycobacteria which cause a wide range of pathology, from lung disease to skin and soft tissue (SST) infections and disseminated disease, mostly in immunocompromised individuals. The antimicrobial susceptibility is variable with high rates of resistance for some subspecies. Distinction between pathogenic and non pathogenic isolates is often difficult. METHODS: We conducted a retrospective review of medical records of patients older than 18 who had an NTM isolated in specimens other than lung, sputum, bronchial lavage, pleural fluid/tissue, between January 2012 and December 2016 at Banner University Medical Center Tucson, Arizona. RESULTS: We identified a total of 33 patients meeting our inclusion criteria. Most common sources were SST in 9 cases (27%), bone and joint in 9 (27%), followed by stool -5/33 (15%), blood -4 (12%), sinus 4 (12%) and disseminated (blood and bone marrow) in 1 case and brain tissue in 1 case. The predominant isolates were Mycobacterium (M.) chelonae- 6/33 (18%), M. avium complex- 5/33 (15%), M. abscessus - 5/33 (15%). None of the stool and sinus isolates were considered pathogenic and treated. Most common presentation was fever 7/33 (21%) and skin rash 7/33 (21%). Only 13/33 (39%) patients received specific treatment for the NTM (SST infection 5/9, bone and joint 3/9, blood 3/4, disseminated 1/1, brain tissue 1/1). Of the 13 treated infections, 9 (70%)were foreign body associated; the hardware was removed in all cases except 2 (1 blood isolate associated with prosthetic valve endocarditis and 1 brain tissue). Susceptibilities were available for 19 isolates. All M. abscessus were resistant to at least 4 drugs but none were resistant to amikacin. For the rapid growers, no standard starting treatment was identified. No pattern of laboratory abnormalities (WBC, hemoglobin, AST, alk phos, ESR, CRP) could be identified. CONCLUSION: Our study shows that extrapulmonary NTM infections remain rare. There was no correlation between the NTM species and clinical significance or severity of disease. Furthermore, in the absence of specific clinical or laboratory features, the decision to treat is largely based on clinical judgment. DISCLOSURES: All authors: No reported disclosures.
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spelling pubmed-56307352017-11-07 Extrapulmonary Nontuberculous Mycobacterial Infections in Southern Arizona Florita, Catalin Zangeneh, Tirdad Georgescu, Anca Open Forum Infect Dis Abstracts BACKGROUND: Nontuberculous mycobacteria (NTM) are a diverse group of environmental mycobacteria which cause a wide range of pathology, from lung disease to skin and soft tissue (SST) infections and disseminated disease, mostly in immunocompromised individuals. The antimicrobial susceptibility is variable with high rates of resistance for some subspecies. Distinction between pathogenic and non pathogenic isolates is often difficult. METHODS: We conducted a retrospective review of medical records of patients older than 18 who had an NTM isolated in specimens other than lung, sputum, bronchial lavage, pleural fluid/tissue, between January 2012 and December 2016 at Banner University Medical Center Tucson, Arizona. RESULTS: We identified a total of 33 patients meeting our inclusion criteria. Most common sources were SST in 9 cases (27%), bone and joint in 9 (27%), followed by stool -5/33 (15%), blood -4 (12%), sinus 4 (12%) and disseminated (blood and bone marrow) in 1 case and brain tissue in 1 case. The predominant isolates were Mycobacterium (M.) chelonae- 6/33 (18%), M. avium complex- 5/33 (15%), M. abscessus - 5/33 (15%). None of the stool and sinus isolates were considered pathogenic and treated. Most common presentation was fever 7/33 (21%) and skin rash 7/33 (21%). Only 13/33 (39%) patients received specific treatment for the NTM (SST infection 5/9, bone and joint 3/9, blood 3/4, disseminated 1/1, brain tissue 1/1). Of the 13 treated infections, 9 (70%)were foreign body associated; the hardware was removed in all cases except 2 (1 blood isolate associated with prosthetic valve endocarditis and 1 brain tissue). Susceptibilities were available for 19 isolates. All M. abscessus were resistant to at least 4 drugs but none were resistant to amikacin. For the rapid growers, no standard starting treatment was identified. No pattern of laboratory abnormalities (WBC, hemoglobin, AST, alk phos, ESR, CRP) could be identified. CONCLUSION: Our study shows that extrapulmonary NTM infections remain rare. There was no correlation between the NTM species and clinical significance or severity of disease. Furthermore, in the absence of specific clinical or laboratory features, the decision to treat is largely based on clinical judgment. DISCLOSURES: All authors: No reported disclosures. Oxford University Press 2017-10-04 /pmc/articles/PMC5630735/ http://dx.doi.org/10.1093/ofid/ofx163.1789 Text en © The Author 2017. Published by Oxford University Press on behalf of Infectious Diseases Society of America. http://creativecommons.org/licenses/by-nc-nd/4.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs licence (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial reproduction and distribution of the work, in any medium, provided the original work is not altered or transformed in any way, and that the work is properly cited. For commercial re-use, please contact journals.permissions@oup.com
spellingShingle Abstracts
Florita, Catalin
Zangeneh, Tirdad
Georgescu, Anca
Extrapulmonary Nontuberculous Mycobacterial Infections in Southern Arizona
title Extrapulmonary Nontuberculous Mycobacterial Infections in Southern Arizona
title_full Extrapulmonary Nontuberculous Mycobacterial Infections in Southern Arizona
title_fullStr Extrapulmonary Nontuberculous Mycobacterial Infections in Southern Arizona
title_full_unstemmed Extrapulmonary Nontuberculous Mycobacterial Infections in Southern Arizona
title_short Extrapulmonary Nontuberculous Mycobacterial Infections in Southern Arizona
title_sort extrapulmonary nontuberculous mycobacterial infections in southern arizona
topic Abstracts
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5630735/
http://dx.doi.org/10.1093/ofid/ofx163.1789
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