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Mycobacteria of lung (non-tuberculosis)

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https://www.readbyqxmd.com/read/30012773/effective-treatment-of-the-mycobacterium-avium-subsp-hominissuis-and-mycobacterium-abscessus-sp-infections-in-macrophages-biofilm-and-in-mice-using-liposomal-ciprofloxacin
#1
James D Blanchard, Valerie Elias, David Cipolla, Igor Gonda, Luiz E Bermudez
Non-tuberculosis mycobacteria (NTM) affects an increasing number of individuals worldwide. The infection is more common in patients with chronic lung conditions, and treatment is challenging. Quinolones, such as ciprofloxacin, have been used to treat patients, but the results have not been encouraging. In this report, we evaluate novel formulations of liposome-encapsulated ciprofloxacin (liposomal ciprofloxacin) in vitro and in vivo Efficacy was examined in macrophages, biofilms and in vivo using intranasal instillation mouse models against Mycobacterium avium and Mycobacterium abscessus Liposomal ciprofloxacin was significantly more active than free ciprofloxacin in macrophages and biofilms against both pathogens...
July 16, 2018: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29867841/teicoplanin-tigecycline-combination-shows-synergy-against-mycobacterium-abscessus
#2
Dinah B Aziz, Jeanette W P Teo, Véronique Dartois, Thomas Dick
Lung disease caused by non-tuberculous mycobacteria (NTM), relatives of Mycobacterium tuberculosis , is increasing. M. abscessus is the most prevalent rapid growing NTM. This environmental pathogen is intrinsically resistant to most commonly used antibiotics, including anti-tuberculosis drugs. Current therapies take years to achieve cure, if cure if achieved. Thus, there is an urgent medical need to identify new, more efficacious treatments. Here, we explore the possibility of repurposing antibiotics developed for other indications...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29788514/endobronchial-ultrasound-in-suspected-non-malignant-mediastinal-lymphadenopathy
#3
L Eickhoff, H Golpon, P Zardo, H Suhling, T Welte, D Jonigk, J Gottlieb, T Fuehner
BACKGROUND:  Endobronchial ultrasound (EBUS) bronchoscopy with transbronchial needle aspiration (TBNA) is a well-established tool in mediastinal staging in lung cancer and gains importance in exploration of non-malignant lymphadenopathy. The aim of this study was to evaluate the role of EBUS-TBNA in suspected non-malignant diseases. METHODS:  A retrospective, single-center, observation analysis of endobronchial ultrasound bronchoscopy procedures was performed in a university medical center between March 2013 and July 2015...
May 22, 2018: Pneumologie
https://www.readbyqxmd.com/read/29757583/what-immunological-defects-predispose-to-non-tuberculosis-mycobacterial-infections
#4
Esmaeil Mortaz, Milad Moloudizargari, Mohammad Varahram, Mehrnaz Movassaghi, Johan Garssen, Mehdi Kazempour Dizagie, Mehdi Mirsaeidi, Ian M Adcock
Nontuberculous mycobacteria (NTM) are categorized as one of the large and diverse groups of environmental organisms which are abundant in water and soil.  NTM cause a variety of diseases in humans that mainly affect the lung. A predisposition to pulmonary NTM is evident in patients with parenchymal structural diseases including bronchiectasis, emphysema, tuberculosis (TB), cystic fibrosis (CF), rheumatologic lung diseases and other chronic diseases with pulmonary manifestations. Lung infections are not the only consequences of being infected by NTM as they can also infect skin and soft tissue and may also cause lymphadenitis (predominantly in young children) and disseminated disease in human immunodeficiency virus (HIV)-infected patients or those with severely compromised immune system...
April 2018: Iranian Journal of Allergy, Asthma, and Immunology
https://www.readbyqxmd.com/read/29520273/extracellular-vesicles-released-from-mycobacterium-tuberculosis-infected-neutrophils-promote-macrophage-autophagy-and-decrease-intracellular-mycobacterial-survival
#5
Violeta D Alvarez-Jiménez, Kahiry Leyva-Paredes, Mariano García-Martínez, Luis Vázquez-Flores, Víctor Gabriel García-Paredes, Marcia Campillo-Navarro, Israel Romo-Cruz, Víctor Hugo Rosales-García, Jessica Castañeda-Casimiro, Sirenia González-Pozos, José Manuel Hernández, Carlos Wong-Baeza, Blanca Estela García-Pérez, Vianney Ortiz-Navarrete, Sergio Estrada-Parra, Jeanet Serafín-López, Isabel Wong-Baeza, Rommel Chacón-Salinas, Iris Estrada-García
Tuberculosis is an infectious disease caused by Mycobacterium tuberculosis (Mtb). In the lungs, macrophages and neutrophils are the first immune cells that have contact with the infecting mycobacteria. Neutrophils are phagocytic cells that kill microorganisms through several mechanisms, which include the lytic enzymes and antimicrobial peptides that are found in their lysosomes, and the production of reactive oxygen species. Neutrophils also release extracellular vesicles (EVs) (100-1,000 nm in diameter) to the extracellular milieu; these EVs consist of a lipid bilayer surrounding a hydrophilic core and participate in intercellular communication...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29321924/lung-mycobacterium-avium-developed-after-removing-an-acupuncture-needle-from-the-lung
#6
Mikihito Saito, Hajime Kasai, Kengo Shimazu, Takashi Urushibara, Tomohiko Iida, Toshihide Shinozaki
Acupuncture needles can cause non-tuberculosis mycobacteria (NTM) infection on the skin, but there are no reports that acupuncture needles inserted into the lung have caused lung NTM infection. A 63-year-old woman, who underwent removal of a broken acupuncture needle inserted into the lung nine years ago, was admitted with nodules in the right lung. The shadow was positioned where the needle had existed. Partial lung resection of the right lower lobe was performed, and the resected area showed caseous necrosis histopathologically...
January 2018: Respirology Case Reports
https://www.readbyqxmd.com/read/29174965/il-6-release-of-rv0183-antigen-stimulated-whole-blood-is-a-potential-biomarker-for-active-tuberculosis-patients
#7
Yongliang Liu, Xiaofei Li, Wei Liu, Yang Liu, Zhouyue Zhong, Lili Wang, ShengXiang Ge, Jun Zhang, Ningshao Xia
OBJECTIVE: New tests for diagnosing active tuberculosis (aTB) are urgently needed, and TB antigen-specific cell-mediated immunity can be expected to develop new testing methods of aTB. MATERIALS AND METHODS: Rv0183 protein, the only monoglyceride lipase identified in mycobacteria, was used to stimulate freshly heparin-treated whole blood. The Rv0183-specific cytokines/chemokines response associated with aTB was screened firstly with 4 aTB patients and 4 LTBIs, and further evaluated in 192 suspected aTB patients and 372 healthy individuals...
April 2018: Journal of Infection
https://www.readbyqxmd.com/read/28719821/bcg-old-workhorse-new-skills
#8
REVIEW
M Gengenbacher, N E Nieuwenhuizen, She Kaufmann
Bacille Calmette-Guérin (BCG), the only tuberculosis (TB) vaccine in clinical practice, has limitations in efficacy, immunogenicity and safety. Much current TB vaccine research focuses on engineering live mycobacteria to interfere with phagosome biology and host intracellular pathways including apoptosis and autophagy, with candidates such as BCG Δzmp1, BCG ΔureC::hly, BCG::ESX-1Mmar , Mtb ΔphoP ΔfadD26, Mtb ΔRD1 ΔpanCD and M. smegmatis Δesx-3::esx-3(Mtb) in the development pipeline. Correlates of protection in preclinical studies include increased central memory CD4+ T cells and recruitment of antigen-specific T cells to the lungs, with mucosal vaccination found to be superior to parenteral vaccination...
August 2017: Current Opinion in Immunology
https://www.readbyqxmd.com/read/28693908/pathology-of-pulmonary-tuberculosis-and-non-tuberculous-mycobacterial-lung-disease-facts-misconceptions-and-practical-tips-for-pathologists
#9
REVIEW
Deepali Jain, Subha Ghosh, Lucileia Teixeira, Sanjay Mukhopadhyay
Most pathologists are familiar with the microscopic features of tuberculosis and the need to examine special stains for acid-fast bacteria (AFB) in cases of granulomatous lung disease. However, misconceptions do exist, including the concept that finding AFB in "caseating granulomas" confirms the diagnosis of tuberculosis. This dogma is attributable to the high prevalence of tuberculosis in many countries, as well as unfamiliarity with the microscopic spectrum of non-tuberculous mycobacterial lung disease...
November 2017: Seminars in Diagnostic Pathology
https://www.readbyqxmd.com/read/28588774/solitary-pulmonary-caseating-granulomas-a-5-year-retrospective-single-center-analysis
#10
Hidehiro Watanabe, Tomonori Uruma, Ikuo Seita, Tsuyoshi Oishi, Yusuke Watanabe, Ayaka Tsukimori, Yoshiteru Haga, Shinji Fukushima, Akihiro Sato, Itaru Nakamura, Tetsuya Matsumoto
Solitary pulmonary caseating granulomas (SPCGs) are a characteristic type of tuberculomas associated with infection with non-tuberculous mycobacteria (NTM) and other microbes; however, their significance remains unclear. The aim of the present study was to describe the clinical characteristics of patients with SPCGs in terms of diagnosis, presence of lung cancer and treatment status. A retrospective analysis of 17 immunocompetent patients with histopathologically confirmed caseating granulomas after undergoing video-assisted thoracoscopic surgery (VATS) was conducted at our center between 2011 and 2015...
June 2017: Molecular and Clinical Oncology
https://www.readbyqxmd.com/read/27826888/non-tuberculous-mycobacteria-classification-diagnostics-and-therapy
#11
REVIEW
I Porvaznik, I Solovič, J Mokrý
Non-tuberculous mycobacteria (NTM) are species other than those belonging to the Mycobacterium tuberculosis complex and do not cause leprosy. NTM are generally free-living organisms that are ubiquitous in the environment. There have been more than 140 NTM species identified to-date. They can cause a wide range of infections, with pulmonary infections being the most frequent (65-90 %). There is growing evidence that the incidence of NTM lung diseases and associated hospitalizations are on the rise, mainly in regions with a low prevalence of tuberculosis...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/27808247/clinical-significance-of-nontuberculous-mycobacteria-isolated-from-respiratory-specimens-in-a-chinese-tuberculosis-tertiary-care-center
#12
Hongfei Duan, Xiqin Han, Qingfeng Wang, Jing Wang, Jun Wang, Naihui Chu, Hairong Huang
The clinical relevance of non-tuberculous mycobacteria (NTM) has been reported to be different dramatically by species or by regions, however, no such evaluation has been performed in China.A retrospective study was performed in Beijing Chest Hospital. All the NTM strains isolated from respiratory specimens in the past 5 years, and patients' clinical records (symptoms and radiographic information etc.) were investigated. The clinical relevance was evaluated according to the criteria recommended by the American Thoracic society...
November 3, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27645543/non-tuberculous-mycobacteria-classification-diagnostics-and-therapy
#13
I Porvaznik, I Solovič, J Mokrý
Non-tuberculous mycobacteria (NTM) are species other than those belonging to the Mycobacterium tuberculosis complex and do not cause leprosy. NTM are generally free-living organisms that are ubiquitous in the environment. There have been more than 140 NTM species identified to-date. They can cause a wide range of infections, with pulmonary infections being the most frequent (65-90 %). There is growing evidence that the incidence of NTM lung diseases and associated hospitalizations are on the rise, mainly in regions with a low prevalence of tuberculosis...
September 20, 2016: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/27437932/observed-patterns-of-systemic-disease-on-pet-ct-scan-in-patients-with-presumed-ocular-tuberculosis-findings-and-hypotheses
#14
Salil Mehta
PURPOSE: To report the clinical, investigational and PET/CT scan findings of patients with presumed ocular tuberculosis and suggest a hypotheses for the pathogenesis. METHODS: Retrospective case review. Included were 10 males and 17 females with an age range: 23-71 years. RESULTS: Clinical findings include granulomatous or non-granulomatous anterior uveitis, intermediate uveitis, panuveitis, vasculitis, and multifocal serpiginous-like choroidopathy...
2018: Ocular Immunology and Inflammation
https://www.readbyqxmd.com/read/27401079/non-tuberculous-mycobacteria-classification-diagnostics-and-therapy
#15
I Porvaznik, I Solovič, J Mokrý
Non-tuberculous mycobacteria (NTM) are species other than those belonging to the Mycobacterium tuberculosis complex and do not cause leprosy. NTM are generally free-living organisms that are ubiquitous in the environment. There have been more than 140 NTM species identified to-date. They can cause a wide range of infections, with pulmonary infections being the most frequent (65-90 %). There is growing evidence that the incidence of NTM lung diseases and associated hospitalizations are on the rise, mainly in regions with a low prevalence of tuberculosis...
July 12, 2016: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/27379030/quantifying-limits-on-replication-death-and-quiescence-of-mycobacterium-tuberculosis-in-mice
#16
Margaret M McDaniel, Nitin Krishna, Winode G Handagama, Shigetoshi Eda, Vitaly V Ganusov
When an individual is exposed to Mycobacterium tuberculosis (Mtb) three outcomes are possible: bacterial clearance, active disease, or latent infection. It is generally believed that most individuals exposed to Mtb become latently infected and carry the mycobacteria for life. How Mtb is maintained during this latent infection remains largely unknown. During an Mtb infection in mice, there is a phase of rapid increase in bacterial numbers in the murine lungs within the first 3 weeks, and then bacterial numbers either stabilize or increase slowly over the period of many months...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27178993/miru-vntr-genotype-diversity-and-indications-of-homoplasy-in-m-avium-strains-isolated-from-humans-and-slaughter-pigs-in-latvia
#17
COMPARATIVE STUDY
Adrija Kalvisa, Constantinos Tsirogiannis, Ivars Silamikelis, Girts Skenders, Lonija Broka, Agris Zirnitis, Inta Jansone, Renate Ranka
Diseases which are caused by non-tuberculous mycobacteria (NTM) are an increasing problem in the developed countries. In Latvia, one of the most clinically important members of NTM is Mycobacterium avium (M. avium), an opportunistic pathogen which has been isolated from several lung disease patients and tissue samples of slaughter pigs. This study was designed to characterize the genetic diversity of the M. avium isolates in Latvia and to compare the distribution of genotypic patterns among humans and pigs...
September 2016: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/26938551/development-of-liposomal-ciprofloxacin-to-treat-lung-infections
#18
REVIEW
David Cipolla, Jim Blanchard, Igor Gonda
Except for management of Pseudomonas aeruginosa (PA) in cystic fibrosis, there are no approved inhaled antibiotic treatments for any other diseases or for infections from other pathogenic microorganisms such as tuberculosis, non-tuberculous mycobacteria, fungal infections or potential inhaled biowarfare agents including Francisella tularensis, Yersinia pestis and Coxiella burnetii (which cause pneumonic tularemia, plague and Q fever, respectively). Delivery of an antibiotic formulation via the inhalation route has the potential to provide high concentrations at the site of infection with reduced systemic exposure to limit side effects...
2016: Pharmaceutics
https://www.readbyqxmd.com/read/26887928/increased-isolation-of-nontuberculous-mycobacteria-among-tb-suspects-in-northeastern-tanzania-public-health-and-diagnostic-implications-for-control-programmes
#19
Abubakar S Hoza, Sayoki G M Mfinanga, Arne C Rodloff, Irmgard Moser, Brigitte König
BACKGROUND: Non-tuberculous mycobacteria (NTM) are increasingly reported worldwide associated with human disease. Defining the significance of NTM in settings with endemic tuberculosis (TB) requires the discrimination of NTM from TB in suspect patients. Correct and timely identification of NTM will impact both therapy and epidemiology of TB and TB-like diseases. The present study aimed at determining the frequency and diversity of NTM among TB suspects in northeastern Tanzania. METHODS: A cross-sectional study was conducted between November 2012 through January 2013...
February 17, 2016: BMC Research Notes
https://www.readbyqxmd.com/read/26871571/il-17ra-in-non-hematopoietic-cells-controls-cxcl-1-and-5-critical-to-recruit-neutrophils-to-the-lung-of-mycobacteria-infected-mice-during-the-adaptive-immune-response
#20
Robin Lombard, Emilie Doz, Florence Carreras, Mathieu Epardaud, Yves Le Vern, Dominique Buzoni-Gatel, Nathalie Winter
During chronic infection with Mycobacterium tuberculosis (Mtb), bacilli multiplication is constrained within lung granulomas until excessive inflammation destroys the lung. Neutrophils are recruited early and participate in granuloma formation, but excessive neutrophilia exacerbates the tuberculosis disease. Neutrophils thus appear as potential targets for therapeutic interventions, especially in patients for whom no antibiotic treatment is possible. Signals that regulate neutrophil recruitment to the lung during mycobacterial infection need to be better understood...
2016: PloS One
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