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Mycobacterium avium

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https://www.readbyqxmd.com/read/29792942/optimisation-of-decontamination-method-and-influence-of-culture-media-on-the-recovery-of-mycobacterium-avium-subspecies-paratuberculosis-from-spiked-water-sediments
#1
G Aboagye, M T Rowe
The recovery of Mycobacterium avium subspecies paratuberculosis (Map) from the environment can be a laborious process - owing to Map being fastidious, its low number, and also high numbers of other microbial populations in such settings. Protocols i.e. filtration, decontamination and modified elution were devised to recover Map from spiked water sediments. Three culture media: Herrold's Egg Yolk Media (HEYM), Middlebrook 7H10 (M-7H10) and Bactec 12B were then employed to grow the organism following its elution...
May 21, 2018: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/29791549/nontuberculous-mycobacterial-lung-disease-in-a-high-tuberculosis-incidence-setting-in-brazil
#2
Maiara Dos Santos Carneiro, Luciana de Souza Nunes, Simone Maria Martini De David, Claudia Fontoura Dias, Afonso Luís Barth, Gisela Unis
OBJECTIVE: The incidence of lung disease caused by nontuberculous mycobacteria (NTM) has been increasing worldwide. In Brazil, there are few studies about nontuberculous mycobacterial lung disease (NTMLD), and its prevalence is yet to be known. Our objective was to determine the specific etiology of the disease in the state of Rio Grande do Sul, Brazil, as well as the frequency and diversity of NTM species in our sample of patients. METHODS: This is a retrospective analysis of the medical records of patients diagnosed with NTMLD treated in a referral center located in the city of Porto Alegre, Brazil, between 2003 and 2013...
April 2018: Jornal Brasileiro de Pneumologia: Publicaça̋o Oficial da Sociedade Brasileira de Pneumologia e Tisilogia
https://www.readbyqxmd.com/read/29788943/profiling-non-tuberculous-mycobacteria-in-an-asian-setting-characteristics-and-clinical-outcomes-of-hospitalized-patients-in-singapore
#3
Albert Y H Lim, Sanjay H Chotirmall, Eric T K Fok, Akash Verma, Partha P De, Soon Keng Goh, Ser Hon Puah, Daryl E L Goh, John A Abisheganaden
BACKGROUND: Non-tuberculous mycobacteria (NTM) infection is an increasing problem worldwide. The epidemiology of NTM in most Asian countries is unknown. This study investigated the epidemiology, and clinical profile of inpatients in whom NTM was isolated from various anatomical sites in a Singaporean population attending a major tertiary referral centre. METHODS: Demographic profile, clinical data, and characteristics of patients hospitalized with NTM isolates at a major tertiary hospital over two-year period were prospectively assessed (2011-2012)...
May 22, 2018: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/29788907/mycobacterium-avium-complex-vertebral-osteomyelitis-in-the-absence-of-hiv-infection-a-case-report-and-review
#4
Megan E Gray, Peter W Liu, Brian Wispelwey
BACKGROUND: Mycobacterium Avium Complex (MAC) is an established microbiologic cause of pulmonary disease, lymphadenitis, and disseminated disease in cases of advanced immune suppression. However, MAC manifesting as vertebral osteomyelitis is less common, and is particularly rare in the absence of Acquired Immunodeficiency Syndrome (AIDS). Prompt diagnosis of MAC vertebral osteomyelitis is challenging, but necessary to prevent serious morbidity or mortality. CASE PRESENTATION: We report a case of MAC osteomyelitis of the lumbar spine in a 70-year-old woman on extended duration corticosteroid therapy for systemic lupus erythematosus who presented with progressive back pain...
May 22, 2018: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29780147/disseminated-mycobacterium-avium-infection-presenting-with-bladder-lesions-in-a-patient-with-interferon-%C3%AE-neutralizing-autoantibodies
#5
Koichi Miyashita, Shun Matsuura, Kenichi Tajima, Shogo Tajima, Ami Aoki, Takuro Sakagami, Naoki Koshimizu, Mikio Toyoshima, Takafumi Suda
A 63-year-old woman presented with a fever, eruption, and sterile pyuria. A cystoscopic examination revealed submucosal nodular lesions in the trigone of the bladder, and a biopsy specimen showed epithelioid cell granulomas in the lamina propria of the bladder. Mycobacterium avium grew in the urine culture. Other organ involvement, such as the lungs, spleen, bones, muscles, and pelvic lymph nodes, was observed on radiological examinations, and M. avium was isolated from some organ lesions. Interferon-γ-neutralizing autoantibodies were detected in the patient' s serum...
May 18, 2018: Internal Medicine
https://www.readbyqxmd.com/read/29779777/interleukin-23-interleukin-17-axis-activated-by-mycobacterium-avium-complex-mac-is-attenuated-in-patients-with-mac-lung-disease
#6
Chin-Chung Shu, Jann-Yuan Wang, Ming-Fang Wu, Hsin-Chih Lai, Bor-Luen Chiang, Chong-Jen Yu
BACKGROUND: Mycobacterium avium complex (MAC)-lung disease (LD) is increasing in patients without human immunodeficiency virus infection. However, data on host vulnerability to MAC-related immune responses, and in particular the interleukin (IL)-23/IL-17 axis, are lacking. METHODS: We enrolled 50 patients with MAC-LD, 25 age-matched patients with tuberculosis (TB) and 25 controls. We measured levels of plasma cytokines, and studied IL-12/IL-17 responses in macrophage and lymphocyte activation to MAC...
May 2018: Tuberculosis
https://www.readbyqxmd.com/read/29778205/immunopathological-changes-and-apparent-recovery-from-infection-revealed-in-cattle-in-an-experimental-model-of-johne-s-disease-using-a-lyophilised-culture-of-mycobacterium-avium-subspecies-paratuberculosis
#7
Douglas J Begg, Karren M Plain, Kumudika de Silva, Ratna Gurung, Alison Gunn, Auriol C Purdie, Richard J Whittington
Johne's disease (JD) or paratuberculosis is an economically significant, chronic enteropathy of ruminants caused by Mycobacterium avium subspecies paratuberculosis (MAP). Experimental models of JD in cattle are logistically challenging due to the need for long term monitoring, because the clinical disease can take years to manifest. Three trials were undertaken, the largest involving 20 cattle exposed orally to a low dose of C strain MAP and 10 controls studied for 4.75 years. Frequent blood and faecal sampling was used to monitor immunological and infection parameters, and intestinal biopsies were performed at two time points during the subclinical disease phase...
June 2018: Veterinary Microbiology
https://www.readbyqxmd.com/read/29774836/pulmonary-infections-with-nontuberculous-mycobacteria-catalonia-spain-1994-2014
#8
Miguel Santin, Irene Barrabeig, Pierre Malchair, Lucia Gonzalez-Luquero, Miguel A Benitez, Josefina Sabria, Merce Palau-Benavent, Concepcion Cañete, Joan A Lloret-Queraltó, Maria D Grijota-Camino, Jordi Dorca, Fernando Alcaide
In Spain, systematic reporting of pulmonary infections with nontuberculous mycobacteria is not mandatory. Therefore, to determine trends, we retrospectively identified cases for January 1994-December 2014 in Catalonia. Over the 21 years, prevalence increased and was associated with being male. Mycobacterium avium complex and M. abscessus prevalence increased; M. kansasii prevalence decreased.
June 2018: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/29773279/-non-tuberculous-mycobacterial-cervical-adenitis-in-children-2-cases
#9
N Sigg, S Bailleul, J-M Turmel, G Legrand, S Kettani, L Martin
BACKGROUND: Cervical lymphadenitis is the most common manifestation of infection with nontuberculous mycobacteria (NTM) in immunocompetent children. Nevertheless, it is poorly known by dermatologists. Its incidence, which is currently increasing since the cessation of BCG vaccination in 2007, raises several issues regarding its pathophysiology, diagnosis and management. PATIENTS AND METHODS: We report two cases of NTM adenitis: one in a 2-year-old girl vaccinated with BCG and one in an unvaccinated 22-month-old boy, in whom a misleading presentation led to delayed diagnosis...
May 14, 2018: Annales de Dermatologie et de Vénéréologie
https://www.readbyqxmd.com/read/29773092/preliminary-study-on-drug-susceptibility-profile-and-resistance-mechanisms-to-macrolides-of-clinical-isolates-of-non-tuberculous-mycobacteria-from-china
#10
Fu Li, Gui Lian Li, Hui Pang, Hai Can Liu, Tong Yang Xiao, Shuang Jun Li, Qiao Luo, Yi Jiang, Rui Bai Wang, Kang Lin Wan
OBJECTIVE: Macrolide susceptibility and drug resistance mechanisms of clinical non-tuberculous mycobacteria (NTM) isolates were preliminarily investigated for more accurate diagnosis and treatment of the infection in China. METHODS: Four macrolides, including clarithromycin (CLAR), azithromycin (AZM), roxithromycin (ROX), and erythromycin (ERY), were used to test the drug susceptibility of 310 clinical NTM isolates from six provinces of China with the broth microdilution method...
April 2018: Biomedical and Environmental Sciences: BES
https://www.readbyqxmd.com/read/29772918/cutaneous-nontuberculous-mycobacterial-infections-in-alberta-canada-an-epidemiologic-study-and-review
#11
Megan A Sander, Judith L Isaac-Renton, Gregory J Tyrrell
BACKGROUND: Cutaneous infections caused by nontuberculous mycobacteria (NTM) occur infrequently. Nonetheless, the incidence of NTM infections is reported to be increasing. In Canada, cutaneous NTM infections have not been well described. OBJECTIVES: A database review from 2006 to 2016 was done to assess species frequency, incidence, and trends of the most common cutaneous NTMs in the province of Alberta, Canada. We also reviewed major diagnostic and epidemiologic aspects of NTM cutaneous infections with a focus on Mycobacterium marinum...
May 1, 2018: Journal of Cutaneous Medicine and Surgery
https://www.readbyqxmd.com/read/29764749/prognosis-of-chronic-pulmonary-aspergillosis-in-patients-with-pulmonary-non-tuberculous-mycobacterial-disease
#12
Maiko Naito, Yu Kurahara, Shiomi Yoshida, Naoya Ikegami, Takehiko Kobayashi, Shojiro Minomo, Kazunobu Tachibana, Kazunari Tsuyuguchi, Seiji Hayashi, Katsuhiro Suzuki
BACKGROUND: Pulmonary non-tuberculous mycobacterial disease (PNTM) is a known risk factor for chronic pulmonary aspergillosis (CPA). However, few studies have focused on the prognosis of PNTM-associated CPA. In the present investigation, we aimed to elucidate the clinical course and prognostic factors of CPA in patients with PNTM. METHODS: We retrospectively investigated the medical records of 62 patients with CPA and a history of PNTM who were admitted to Kinki-chuo Chest Medical Center between 2010 and 2015...
May 11, 2018: Respiratory Investigation
https://www.readbyqxmd.com/read/29761519/evaluation-of-needle-trap-micro-extraction-and-solid-phase-micro-extraction-obtaining-comprehensive-information-on-volatile-emissions-from-in-vitro-cultures
#13
Peter Oertel, Andreas Bergmann, Sina Fischer, Phillip Trefz, Anne Küntzel, Petra Reinhold, Heike Köhler, Jochen K Schubert, Wolfram Miekisch
Volatile organic compounds (VOCs) emitted from in vitro cultures may reveal information on species and metabolism. Due to low nmol L-1 concentration ranges, pre-concentration techniques are required for gas-chromatography mass-spectrometry (GC-MS) based analyses. This study was intended to compare the efficiency of established micro-extraction techniques - solid-phase micro-extraction (SPME) and needle-trap micro-extraction (NTME) - for the analysis of complex VOC patterns. For SPME, a 75 μm Carboxen®/Polydimethylsiloxane fibre was used...
May 14, 2018: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/29760920/serum-lipidomics-of-bovine-paratuberculosis-disruption-of-choline-containing-glycerophospholipids-and-sphingolipids
#14
Paul L Wood, Erdal Erol, Glen F Hoffsis, Margaret Steinman, Jeroen DeBuck
Objectives: Bovine paratuberculosis is a devastating infection with Mycobacterium avium subspecies paratuberculosis that ultimately results in death from malnutrition. While the infection is characterized by a long (2-4 years) subclinical phase with immune activation, ultimately host defense mechanisms fail and the bacteria spread from the small intestine to other organs. Since both the gastrointestinal tract and liver are essential for the biosynthesis of structural glycerophospholipids, we investigated the circulating levels of these lipids in field infections and experimentally infected cattle...
2018: SAGE Open Medicine
https://www.readbyqxmd.com/read/29760127/-in-vitro-activity-of-clofazimine-against-non-tuberculous-mycobacteriaisolated-in-beijing-china
#15
Jingjing Luo, Xia Yu, Guanglu Jiang, Yuhong Fu, Fengmin Huo, Yifeng Ma, Fen Wang, Yuanyuan Shang, Qian Liang, Yi Xue, Hairong Huang
Due to the natural resistance of non-tuberculous mycobacteria(NTM) to lots of antibiotics,treatment of diseases caused by NTM is often long-termed but less successful.The main goal of this study was to evaluate the in vitro susceptibility to clofazimine of 209 isolates consisting of different NTM species isolated in Beijing,China. Furthermore,47 reference strains were also tested, including 30 rapidly growing mycobacterium (RGM) species and 17 slowly growing mycobacterium(SGM) species.The potential molecular mechanism contributing to clofazimine resistance of NTM was investigated as well...
May 14, 2018: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29753484/short-communication-heritability-estimates-for-susceptibility-to-mycobacterium-avium-ssp-paratuberculosis-infection-in-chinese-holstein-cattle
#16
Y Gao, J Cao, S Zhang, Q Zhang, D Sun
Paratuberculosis in ruminants, which is caused by Mycobacterium avium ssp. paratuberculosis (MAP), is a contagious, chronic enteric disease associated with economic losses, animal welfare, and health implications in dairy cattle production. In this study, we estimated the variance components and heritability of susceptibility to MAP infection in Chinese Holstein cattle. We collected 4,937 serum samples from cows in 7 dairy herds in the Beijing region of China and used the ELISA test to detect antibodies to MAP...
May 9, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29753465/short-communication-uncovering-quantitative-trait-loci-associated-with-resistance-to-mycobacterium-avium-ssp-paratuberculosis-infection-in-holstein-cattle-using-a-high-density-single-nucleotide-polymorphism-panel
#17
Sanjay Mallikarjunappa, M Sargolzaei, L F Brito, K G Meade, N A Karrow, S D Pant
Mycobacterium avium ssp. paratuberculosis (MAP) is the etiological agent of Johne's disease in cattle. Johne's disease is a disease of significant economic, animal welfare, and public health concern around the globe. Therefore, understanding the genetic architecture of resistance to MAP infection has great relevance to advance genetic selection methods to breed more resistant animals. The objectives of this study were to perform a genome-wide association study of previously analyzed 50K genotypes now imputed to a high-density single nucleotide polymorphism panel (777K), aiming to validate previously reported associations and potentially identify additional single nucleotide polymorphisms associated with antibody response to MAP infection...
May 9, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29740544/establishment-of-a-host-to-host-transmission-model-for-mycobacterium-avium-subsp-hominissuis-using-caenorhabditis-elegans-and-identification-of-colonization-associated-genes
#18
Luiz E Bermudez, Sasha J Rose, Jamie L Everman, Navid R Ziaie
Mycobacterium avium subsp. hominissuis ( M. avium ) is a member of the non-tuberculous mycobacteria (NTM), and is a common cause of lung infection in patients with chronic NTM lung conditions. M. avium is an environmental bacterium believed to be transmitted from environmental sources. In this work we used a recently developed model in Caenorhabditis elegans to ask whether M. avium can be transmitted from host-to-host, and the bacterial genes associated with host colonization. Infection of C. elegans was carried out by placing the nematode in cultured with M...
2018: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/29738438/proctitis-caused-by-mycobacterium-avium-intracellulare-in-an-hiv-infected-patient
#19
Jose Armando Gonzales Zamora, Clara Milikowski
Infectious proctitis is usually associated with sexually transmitted diseases, especially in HIV-infected individuals. Limited information is found about the role of Mycobacterium avium-intracellulare as a causative agent for this condition. Here, we report the case of an HIV-infected patient with a CD4 count of 304 cells/uL and undetectable HIV viral load, who presented with constipation and painful defecation. Endoscopic evaluation was significant for shallow rectal ulcerations. Histopathology revealed poorly formed granulomas...
May 8, 2018: Diseases (Basel)
https://www.readbyqxmd.com/read/29738302/care-and-treatment-of-a-rare-mycobacterium-avium-complex-infected-wound-a-case-report
#20
Min Wei, Qixia Jiang, Jiandong Wang
An unusual presentation of Mycobacterium avium complex (MAC), unlikely to be encountered in an outpatient dermatology setting, was diagnosed in a patient without an immunodeficiency. A 47-year-old woman, who was immunocompetent and had no risk factors, presented with a full-thickness, infected wound (large amounts of purulent exudate and severe pain) on her back, which had been present for two months. She was diagnosed as having an MAC infection, using a DNA microarray chip method. The patient underwent wound drainage and a fresh silver-containing dressing was applied daily for two months...
May 2, 2018: Journal of Wound Care
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