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Mycobacterium avium complex

Kenneth N Olivier, David E Griffith, Gina Eagle, John P McGinnis Ii, Liza Micioni, Keith Liu, Charles L Daley, Kevin L Winthrop, Stephen Ruoss, Doreen J Addrizzo-Harris, Patrick A Flume, Daniel Dorgan, Matthias Salathe, Barbara A Brown-Elliott, Renu Gupta, Richard J Wallace
Rationale Lengthy multi-drug, toxic, and low efficacy regimens limit management of pulmonary nontuberculous mycobacterial (PNTM) disease. Objective This phase 2 study investigated efficacy and safety of liposomal amikacin for inhalation (LAI) in treatment-refractory PNTM (Mycobacterium avium complex [MAC] or Mycobacterium abscessus) disease. Methods During the double-blind phase, patients were randomly assigned to LAI (590 mg) or placebo once daily added to their multi-drug regimen for 84 days. Both groups could receive open-label LAI for 84 additional days...
October 17, 2016: American Journal of Respiratory and Critical Care Medicine
Kiran M Perkins, Adrian Lawsin, Nabeeh A Hasan, Michael Strong, Alison L Halpin, Rachael R Rodger, Heather Moulton-Meissner, Matthew B Crist, Suzanne Schwartz, Julia Marders, Charles L Daley, Max Salfinger, Joseph F Perz
In the spring of 2015, investigators in Switzerland reported a cluster of six patients with invasive infection with Mycobacterium chimaera, a species of nontuberculous mycobacterium ubiquitous in soil and water. The infected patients had undergone open-heart surgery that used contaminated heater-cooler devices during extracorporeal circulation (1). In July 2015, a Pennsylvania hospital also identified a cluster of invasive nontuberculous mycobacterial infections among open-heart surgery patients. Similar to the Swiss report, a field investigation by the Pennsylvania Department of Health, with assistance from CDC, used both epidemiologic and laboratory evidence to identify an association between invasive Mycobacterium avium complex, including M...
October 14, 2016: MMWR. Morbidity and Mortality Weekly Report
Kohei Fujita, Masaki Fujita, Yutaka Ito, Toyohiro Hirai, Tadashi Mio, Kentaro Watanabe, Michiaki Mishima
Although sitafloxacin (STFX) is known to have a favorable minimum inhibitory concentration for Mycobacterium avium, few studies have evaluated the clinical efficacy of an STFX-containing regimen for pulmonary M avium complex (MAC) disease. To evaluate the clinical efficacy of STFX-containing regimens for relapsed or refractory pulmonary MAC disease, we retrospectively reviewed 18 patients with pulmonary MAC disease who received STFX for at least 4 weeks for pulmonary MAC disease between January 2008 and February 2016...
September 2016: Open Forum Infectious Diseases
Özge Mine Örenay, Funda Tamer, Evren Sarıfakıoğlu, Umran Yıldırım
No abstract text is available yet for this article.
September 2016: Acta Dermatovenerologica Alpina, Panonica, et Adriatica
Katarina Čurić, Mario Poljak, Alojz Ihan, Janez Tomažič
A small proportion of HIV-infected patients rapidly progress to AIDS; indeed, some individuals have been known to progress to AIDS within a year after primary infection. Pneumonia caused by Pneumocystis jirovecii (PCP) is the most frequent AIDS-defining illness. However, PCP can also rarely occur during primary HIV infection as a result of the severe immunosuppression that may accompany the early stage of HIV infection. Immune reconstitution inflammatory syndrome (IRIS) comprises two distinct syndromes: paradoxical IRIS and unmasking IRIS...
September 2016: Acta Dermatovenerologica Alpina, Panonica, et Adriatica
Ranu Surolia, Suman Karki, Zheng Wang, Tejaswini Kulkarni, Fu Jun Li, Shikhar Vohra, Hitesh Batra, Jerry A Nick, Steven R Duncan, Victor J Thannickal, Adrie Jc Steyn, Anupam Agarwal, Veena B Antony
Pulmonary infections with non-tuberculous mycobacteria (P-NTM) such as by Mycobacterium avium complex (M. avium) are increasingly found in the elderly, but the underlying mechanisms are unclear. Recent studies suggest that adaptive immunity is necessary but not sufficient for host defense against mycobacteria. Heme oxygenase-1 (HO-1) has been recognized as a critical modulator of granuloma formation and programmed cell death in mycobacterial infections. Old mice (18-21 months) infected with M. avium had attenuated HO-1 response with diffuse inflammation, high burden of mycobacteria, poor granuloma formation, and decreased survival (45%) while young mice (4-6 months) showed tight, well defined granuloma, increased HO-1 expression and increased survival (95%)...
September 30, 2016: American Journal of Physiology. Lung Cellular and Molecular Physiology
E P Judge, M Ahmed, M Fitzgerald, A M McLaughlin, J Keane
The prevalence of Mycobacterium avium complex (MAC) pulmonary disease is increasing globally. However, reliable national and international data relating to its epidemiology and management is lacking. During the period 2003-2014, MAC was isolated from the pulmonary samples of 75 patients at the Irish Mycobacteria Reference Laboratory (IMRL). Most patients (42, 56%) had underlying pulmonary disease, and 37 (49%) had clinical/radiographic characteristics consistent with MAC pulmonary disease. However, only 18 patients (24%) fulfilled internationally accepted criteria for diagnosis/treatment of this disease...
2016: Irish Medical Journal
Tavs Qvist, Tacjana Pressler, Terese L Katzenstein, Niels Høiby, Michael T Collins
INTRODUCTION: The aim of this study was to test a commercial bovine enzyme-linked immunosorbent assay for investigating antibody activity against Mycobacterium avium complex. METHODS: All patients at the Copenhagen Cystic Fibrosis (CF) Center who had culture for nontuberculous mycobacteria performed were included. A commercially available antibody test used in veterinary medicine, was adjusted for human use, and applied to patient sera in a cross sectional test...
September 20, 2016: Pediatric Pulmonology
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
M Songini, C Mannu, C Targhetta, G Bruno
Type 1 diabetes (T1D) results from an autoimmune destruction of insulin-producing beta cells that requires lifelong insulin treatment. While significant advances have been achieved in treatment, prevention of complications and quality of life in diabetic people, the identification of environmental triggers of the disease is far more complex. The island of Sardinia has the second highest incidence of T1D in the world (45/100,000), right after Finland (64.2/100,000). The genetic background as well as the environment of the island's inhabitants makes it an ideal region for investigating environmental, immunological and genetic factors related to the etiopathogenesis of T1D...
September 17, 2016: Acta Diabetologica
Daniel P Boyle, Teresa R Zembower, Chao Qi
RATIONALE: Clinical recurrence of Mycobacterium avium complex (MAC) pulmonary disease occurs in 10-40% of patients treated for this disease process. Episodes of clinical recurrence may represent true relapse from the same MAC strain or reinfection with a new strain. OBJECTIVES: The purpose of this study was to investigate the clinical implications of separating patients into these two groups. METHODS: This retrospective study evaluated patients with a clinical recurrence of MAC pulmonary disease at our institution from 2000 to 2012...
September 6, 2016: Annals of the American Thoracic Society
Shuichi Asano, Shige Mizuno, Shotaro Okachi, Hiromichi Aso, Keiko Wakahara, Naozumi Hashimoto, Satoru Ito, Yohei Kozaki, Takayuki Katsuno, Shoichi Maruyama, Yoshinori Hasegawa
A 73-year-old woman was diagnosed with pulmonary Mycobacterium avium complex (MAC) infection and received no treatment. Disease progression was evident one year later with the development of myeloperoxidase-antineutrophil cytoplasmic antibody (ANCA) titers and systemic symptoms of a fever, polyarthritis, purpura, and rapidly progressive glomerulonephritis. Her symptoms did not improve with antibiotic treatment. A renal biopsy revealed crescentic glomerulonephritis with immunodeposition. According to these findings, she was diagnosed with ANCA-associated vasculitis (AAV) superimposed on infection-related glomerulonephritis (IRGN)...
2016: Internal Medicine
Seong Mi Moon, Hye Yun Park, Su-Young Kim, Byung Woo Jhun, Hyun Lee, Kyeongman Jeon, Dae Hun Kim, Hee Jae Huh, Chang-Seok Ki, Nam Yong Lee, Hong Kwan Kim, Yong Soo Choi, Jhingook Kim, Seung-Heon Lee, Chang Ki Kim, Sung Jae Shin, Charles L Daley, Won-Jung Koh
Macrolide antibiotics are key components of the multidrug treatment regimen for treating lung disease (LD) due to Mycobacterium avium complex (MAC). Despite the emergence of macrolide resistance, limited data are available on macrolide-resistant MAC-LD. This study evaluated the clinical features and treatment outcomes of patients with macrolide-resistant MAC-LD and the molecular characteristics of the macrolide-resistant isolates. A retrospective review of the medical records of 34 patients with macrolide-resistant MAC-LD, who were diagnosed between January 2002 and December 2014, was performed along with genetic analysis of 28 clinical isolates...
August 29, 2016: Antimicrobial Agents and Chemotherapy
Kate Buchacz, Bryan Lau, Yuezhou Jing, Ronald Bosch, Alison G Abraham, M John Gill, Michael J Silverberg, James J Goedert, Timothy R Sterling, Keri N Althoff, Jeffrey N Martin, Greer Burkholder, Neel Gandhi, Hasina Samji, Pragna Patel, Anita Rachlis, Jennifer E Thorne, Sonia Napravnik, Keith Henry, Angel Mayor, Kelly Gebo, Stephen J Gange, Richard D Moore, John T Brooks
BACKGROUND: There are few recent data on the rates of AIDS-defining opportunistic infections (OIs) among human immunodeficiency virus (HIV)-infected patients in care in the United States and Canada. METHODS: We studied HIV-infected participants in 16 cohorts in the North American AIDS Cohort Collaboration on Research and Design (NA-ACCORD) during 2000-2010. After excluding 16 737 (21%) with any AIDS-defining clinical events documented before NA-ACCORD enrollment, we analyzed incident OIs among the remaining 63 541 persons, most of whom received antiretroviral therapy during the observation...
September 15, 2016: Journal of Infectious Diseases
Michal Slany, Vit Ulmann, Iva Slana
The nontuberculous mycobacteria are typically environmental organisms residing in soil and water. These microorganisms can cause a wide range of clinical diseases; pulmonary disease is most frequent, followed by lymphadenitis in children, skin and soft tissue disease, and rare extra pulmonary or disseminated infections. Mycobacterium avium complex is the second most common cause of pulmonary mycobacterioses after M. tuberculosis. This review covers the clinical and laboratory diagnosis of infection caused by the members of this complex and particularities for the treatment of different disease types and patient populations...
2016: BioMed Research International
Panagiota Vlachogianni, Maria Volosyraki, Maria Stefanidou, Sabine Krueger-Krasagakis, George Evangelou, Vrettos Haniotis, Diamantis Kofteridis, Sofia Maraki, Konstantin Krasagakis
INTRODUCTION: Soft tissue infections with Mycobacterium avium complex are more likely to appear in immunocompromised patients. However, they may rarely arise in non-immunosuppressed individuals. AIM: To present the case of an ear infection with Mycobacterium avium in the absence of demonstrable immunosuppression. CASE REPORT: Clinical case description, blood tests, routine histology and tissue cultures. DISCUSSION: A female, apparent immunocompetent patient presented with a 6-month reddish, oedematous and painless lesion with fine scaling in the right ear...
April 2016: Folia Medica
Asuman Şamlı, Arzu İlki
Mycobacteria are an important cause of morbidity in humans. Rapid and accurate mycobacterial identification is important for improving patient outcomes. However, identification of Mycobacterium species is not easy, due to the slow and fastidious growth of mycobacteria. Recently, biochemical, sequencing, and probing methods have come to be used for identification. This study compared the performance of matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) for the identification of M...
August 23, 2016: New Microbiologica
L Máiz, R Girón, C Olveira, M Vendrell, R Nieto, M A Martínez-García
BACKGROUND: Data on the prevalence of and factors associated with nontuberculous mycobacteria (NTM) in patients with non-cystic fibrosis (CF) bronchiectasis are limited. Our aim was to determine the prevalence and factors associated with isolation of NTM in this population. METHODS: We performed a multicenter observational study of historical cohorts comprising consecutive patients with non-CF bronchiectasis and at least 2 sputum samples cultured for mycobacteria over a period of 5 years...
2016: BMC Infectious Diseases
Nikhil G Bharambe, Deivanayaga V Barathy, Wajeed Syed, Sandhya S Visweswariah, Melwin Colaςo, Sandra Misquith, Kaza Suguna
The two second messengers in signaling, cyclic AMP and cyclic GMP, are produced by adenylyl and guanylyl cyclases, respectively. Recognition and discrimination of the substrates ATP and GTP by the nucleotidyl cyclases is vital in these reactions. Various apo, substrate or inhibitor bound forms of adenylyl cyclase (AC) structures from transmembrane and soluble ACs have revealed the catalytic mechanism of ATP cyclization reaction. Previously reported structures of guanylyl cyclases represent ligand-free forms and inactive open states of the enzymes and thus do not provide information regarding the exact mode of substrate binding...
August 20, 2016: FEBS Journal
Gabriel T Faz, Mahmoud Eltorky, Bernard Karnath
BACKGROUND Extraskeletal osteosarcomas (ESOS) of the mediastinum are extremely rare and may present with concurrent nontuberculous mycobacteria infection. CASE REPORT We present the second documented case of high-grade anterior mediastinal extraskeletal osteosarcoma in a 59-year-old man with a history of treated, latent tuberculosis (TB). Sputum samples grew Mycoplasma avium complex and Mycobacterium fortuitum. Imaging showed a right-sided 7.6 cm mass with compression of the main bronchus. Subsequent biopsy with vimentin staining established the diagnosis of ESOS...
2016: American Journal of Case Reports
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