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Mycobacterium avium intracellulare

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https://www.readbyqxmd.com/read/27905994/the-role-of-il-10-in-mycobacterium-avium-subsp-paratuberculosis-infection
#1
REVIEW
Tariq Hussain, Syed Zahid Ali Shah, Deming Zhao, Srinand Sreevatsan, Xiangmei Zhou
Mycobacterium avium subsp. paratuberculosis (MAP) is an intracellular pathogen and is the causative agent of Johne's disease of domestic and wild ruminants. Johne's disease is characterized by chronic granulomatous enteritis leading to substantial economic losses to the livestock sector across the world. MAP persistently survives in phagocytic cells, most commonly in macrophages by disrupting its early antibacterial activity. MAP triggers several signaling pathways after attachment to pathogen recognition receptors (PRRs) of phagocytic cells...
December 1, 2016: Cell Communication and Signaling: CCS
https://www.readbyqxmd.com/read/27901051/mycobacterium-avium-mav2054-protein-induces-macrophage-apoptosis-by-targeting-mitochondria-and-reduces-intracellular-bacterial-growth
#2
Kang-In Lee, Jake Whang, Han-Gyu Choi, Yeo-Jin Son, Haet Sal Jeon, Yong Woo Back, Hye-Soo Park, Seungwha Paik, Jeong-Kyu Park, Chul Hee Choi, Hwa-Jung Kim
Mycobacterium avium complex induces macrophage apoptosis. However, the M. avium components that inhibit or trigger apoptosis and their regulating mechanisms remain unclear. We recently identified the immunodominant MAV2054 protein by fractionating M. avium culture filtrate protein by multistep chromatography; this protein showed strong immuno-reactivity in M. avium complex pulmonary disease and in patients with tuberculosis. Here, we investigated the biological effects of MAV2054 on murine macrophages. Recombinant MAV2054 induced caspase-dependent macrophage apoptosis...
November 30, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27868301/exploring-maldi-tof-ms-approach-for-a-rapid-identification-of-mycobacterium-avium-subsp-paratuberculosis-field-isolates
#3
M Ricchi, A Mazzarelli, A Piscini, A Di Caro, A Cannas, S Leo, S Russo, N Arrigoni
AIMS: The aim of the study was to explore the suitability of MALDI-TOF MS for a rapid and correct identification of Mycobacterium avium subsp. paratuberculosis (MAP) field isolates. METHODS AND RESULTS: MALDI-TOF MS approach is becoming one of the most popular tests for the identification of intact bacterial cells which has been shown to be fast and reliable. For this purpose, 36 MAP field isolates were analysed through MALDI-TOF MS and the spectra compared with two different databases: one provided by the vendor of the system employed (Biotyper Version 3...
November 21, 2016: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/27829372/identification-of-mycobacterium-avium-subsp-hominissuis-secreted-proteins-using-an-in-vitro-system-mimicking-the-phagosomal-environment
#4
Jessica J Chinison, Lia Danelishvili, Rashmi Gupta, Sasha J Rose, Lmar M Babrak, Luiz E Bermudez
BACKGROUND: Mycobacterium avium subsp. hominissuis is a common intracellular pathogen that infects patients with HIV/AIDS and cause lung infection in patients with underlying lung pathology. M.avium preferably infects macrophages and uses diverse mechanisms to alter phagosome maturation. Once in the macrophage, the pathogen can alter the host cellular defenses by secreting proteins into the cytosol of host cells, but despite considerable research, only a few secreted effector proteins have been identified...
November 9, 2016: BMC Microbiology
https://www.readbyqxmd.com/read/27807554/mycobacterium-avium-intracellulare-complex-mac-producing-a-periportal-pseudotumor-in-a-patient-with-hiv-and-a-normal-cd4-count
#5
Jessica Johnson, Meghan Driscoll, Michael Cohen, Douglas G Adler
Mycobacterium avium-intracellulare complex (MAC) is an opportunistic infection typically associated with profound immunosuppression, such as AIDS. The presentation of disseminated MAC can be subtle and mimic systemic symptoms associated with lymphoma; abdominal pseudotumor is an exceptionally rare presentation. In the era of highly active anti-retroviral therapy (HAART), opportunistic infections are increasingly rare, and secondary prophylaxis for MAC may be discontinued after adequate therapy and immune reconstitution...
August 2016: ACG Case Reports Journal
https://www.readbyqxmd.com/read/27806993/superior-protection-from-live-attenuated-vaccines-directed-against-johne-s-disease
#6
Daniel C Shippy, Justin J Lemke, Aubrey Berry, Kathryn Nelson, Murray E Hines, Adel M Talaat
Mycobacterium avium subspecies paratuberculosis (M. paratuberculosis) is the etiological agent of Johne's disease in ruminants. Johne's disease is an important enteric infection causing large economic losses associated with infected herds. In an attempt to fight this infection, we created two novel live-attenuated vaccine candidates with mutations in sigH and lipN (pgsH and pgsN, respectively). Earlier reports in mice suggested these vaccines are promising candidates to fight Johne's disease in ruminants. In this study, we tested the performance of the two constructs as vaccine candidates using the goat model of Johne's disease...
November 2, 2016: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/27804902/non-tuberculous-mycobacteria-epidemiological-pattern-in-a-reference-laboratory-and-risk-factors-associated-with-pulmonary-disease
#7
J Mencarini, C Cresci, M T Simonetti, C Truppa, G Camiciottoli, M L Frilli, P G Rogasi, S Veloci, M Pistolesi, G M Rossolini, A Bartoloni, F Bartalesi
The diseases caused by non-tuberculous mycobacteria (NTM), in both AIDS and non-AIDS populations, are increasingly recognized worldwide. Although the American Thoracic Society published the guidelines for diagnosis of NTM pulmonary disease (NTM-PD), the diagnosis is still difficult. In the first part of the study, we collected data on NTM isolates in the Mycobacteriology Laboratory of Careggi Hospital (Florence, Italy) and analysed the epidemiological data of NTM isolates. Then, to analyse the risk factors associated to NTM-PD, we studied the presence of ATS/IDSA criteria for NTM-PD in patients who had at least one positive respiratory sample for NTM and were admitted to the Infectious Disease Unit and the Section of Respiratory Medicine...
November 2, 2016: Epidemiology and Infection
https://www.readbyqxmd.com/read/27803833/coexistent-pseudogout-and-mycobacterium-avium-intracellulare-septic-arthritis-in-a-patient-with-hiv-and-esrd
#8
Wais Afzal, Omer M Wali, Kelly L Cervellione, Bhupinder B Singh, Farshad Bagheri
Pseudogout is a crystal-induced arthropathy characterized by the deposition of calcium pyrophosphate dihydrate (CPPD) crystals in synovial fluid, menisci, or articular cartilage. Although not very common, this entity can be seen in patients with chronic kidney disease (CKD). Septic arthritis due to Mycobacterium avium-intracellulare (MAI) is a rare entity that can affect immunocompromised patients such as those with acquired immunodeficiency syndrome (AIDS) or those who are on immunosuppressive drugs. Here, we describe a 51-year-old female who presented with fever, right knee pain, swelling, warmth, and decreased range of motion for several days...
2016: Case Reports in Rheumatology
https://www.readbyqxmd.com/read/27788025/a-laboratory-based-analysis-of-nontuberculous-mycobacterial-lung-disease-in-japan-from-2012-to-2013
#9
Kozo Morimoto, Naoki Hasegawa, Kiyohiko Izumi, Ho Namkoong, Kazuhiro Uchimura, Takashi Yoshiyama, Yoshihiko Hoshino, Atsuyuki Kurashima, Jun Sokunaga, Shunsuke Shibuya, Masahiro Shimojima, Manabu Ato, Satoshi Mitarai
RATIONALE: Since 2010, studies that utilize mycobacterial examination results have been widely used to survey nontuberculous mycobacterial (NTM) lung disease. OBJECTIVES: Our study aims to reveal the clinical and epidemiological status of NTM lung disease in Japan. METHODS: All data on the isolation and identification of mycobacteria in 2012 and 2013 were obtained from three dominant commercial laboratories in Japan. Pulmonary disease were defined based on the bacteriological diagnostic criteria issued by the American Thoracic Society and the Infectious Diseases Society of America (ATS/IDSA)...
October 27, 2016: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/27782812/real-time-pcr-for-the-rapid-identification-and-drug-susceptibility-of-mycobacteria-present-in-bronchial-washings
#10
Thilini Piushani Keerthirathne, Dhammika Nayoma Magana-Arachchi, Dushantha Madegedara, Suneth Sithumini Sooriyapathirana
BACKGROUND: Mycobacteria have a spectrum of virulence and different susceptibilities to antibiotics. Distinguishing mycobacterial species is vital as patients with non-tuberculous mycobacterial (NTM) infections present clinical features that are similar to those of patients with tuberculosis. Thus, rapid differentiation of Mycobacterium tuberculosis complex from NTM is critical to administer appropriate treatment. Hence the aim of the study was to rapid identification of mycobacterial species present in bronchial washings using multiplex real time Polymerase Chain Reaction (PCR) and to determine the drug susceptibility in identified mycobacterial species...
October 26, 2016: BMC Infectious Diseases
https://www.readbyqxmd.com/read/27780201/environmental-nontuberculous-mycobacteria-in-the-hawaiian-islands
#11
Jennifer R Honda, Nabeeh A Hasan, Rebecca M Davidson, Myra D Williams, L Elaine Epperson, Paul R Reynolds, Terry Smith, Elena Iakhiaeva, Matthew J Bankowski, Richard J Wallace, Edward D Chan, Joseph O Falkinham, Michael Strong
Lung disease caused by nontuberculous mycobacteria (NTM) is an emerging infectious disease of global significance. Epidemiologic studies have shown the Hawaiian Islands have the highest prevalence of NTM lung infections in the United States. However, potential environmental reservoirs and species diversity have not been characterized. In this cross-sectional study, we describe molecular and phylogenetic comparisons of NTM isolated from 172 household plumbing biofilms and soil samples from 62 non-patient households and 15 respiratory specimens...
October 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/27749897/16s-23s-internal-transcribed-spacer-region-pcr-and-sequencer-based-capillary-gel-electrophoresis-has-potential-as-an-alternative-to-high-performance-liquid-chromatography-for-identification-of-slowly-growing-nontuberculous-mycobacteria
#12
Shradha Subedi, Fanrong Kong, Peter Jelfs, Timothy J Gray, Meng Xiao, Vitali Sintchenko, Sharon C-A Chen
Accurate identification of slowly growing nontuberculous mycobacteria (SG-NTM) of clinical significance remains problematic. This study evaluated a novel method of SG-NTM identification by amplification of the mycobacterial 16S-23S rRNA internal transcribed spacer (ITS) region followed by resolution of amplified fragments by sequencer-based capillary gel electrophoresis (SCGE). Fourteen American Type Culture Collection (ATCC) strains and 103 clinical/environmental isolates (total n = 24 species) of SG-NTM were included...
2016: PloS One
https://www.readbyqxmd.com/read/27665179/investigation-of-c-5-alkynyl-alkynyloxy-or-hydroxymethyl-and-or-n-3-propynyl-substituted-pyrimidine-nucleoside-analogs-as-a-new-class-of-antimicrobial-agents
#13
Saurabh Garg, Neeraj Shakya, Naveen C Srivastav, Babita Agrawal, Dennis Y Kunimoto, Rakesh Kumar
The resurgence of mycobacterial infections and the emergence of drug-resistant strains urgently require a new class of agents that are distinct than current therapies. A group of 5-ethynyl (6-10), 5-(2-propynyloxy) (16, 18, 20, 22, 24), 5-(2-propynyloxy)-3-N-(2-propynyl) (17, 19, 21, 23, 25) and 5-hydroxymethyl-3-N-(2-propynyl) (30-33) derivatives of pyrimidine nucleosides were synthesized and evaluated against mycobacteria [Mycobacterium tuberculosis (Mtb), Mycobacterium bovis (BCG) and Mycobacterium avium], gram-positive bacteria (Staphylococcus aureus and Enterococcus faecalis) and gram-negative bacteria (Escherichia coli, Salmonella typhimurium and Pseudomonas aeruginosa) alone and in combination with existing drugs in in vitro assays...
November 1, 2016: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/27620657/mycobacterium-avium-intracellulare-and-the-unpredictable-course-of-hypercalcemia-in-an-aids-patient
#14
Houriya Ayoubieh, Eyas Alkhalili
A 37-year-old man with AIDS presented with altered mental status four weeks after stopping his medications for Mycobacterium avium-intracellulare (MAI). He had low CD4 cell count and severe hypercalcemia. Bone marrow biopsy revealed bone marrow infiltration by granulomas positive for acid-fast bacilli and cultures grew MAI. His hypercalcemia continued to worsen with the initiation of MAI therapy but we were able to treat it successfully with pamidronate and calcitonin.
September 9, 2016: Brazilian Journal of Infectious Diseases
https://www.readbyqxmd.com/read/27614838/gamma-delta-t-cells-are-early-responders-to-mycobacterium-avium-ssp-paratuberculosis-in-colostrum-replete-holstein-calves
#15
L A Krueger, D C Beitz, S B Humphrey, J R Stabel
Peripheral blood mononuclear cells (PBMC) and mesenteric node lymphocytes (MNL) were obtained from 30 calves that were assigned randomly at birth to 1 of 6 treatment groups with 5 calves per treatment in a 14-d study: (1) colostrum-deprived (CD), no vitamins; (2) colostrum-replacer (CR), no vitamins; (3) CR, vitamin A; (4) CR, vitamin D3; (5) CR, vitamin E; (6) CR, vitamins A, D3, E. Calves were injected with appropriate vitamin supplements and fed pasteurized whole milk (CD calves) or fractionated colostrum replacer (CR calves) at birth...
September 7, 2016: Journal of Dairy Science
https://www.readbyqxmd.com/read/27572413/clinical-characteristics-treatment-outcomes-and-resistance-mutations-associated-with-macrolide-resistant-mycobacterium-avium-complex-lung-disease
#16
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
https://www.readbyqxmd.com/read/27555322/subversion-of-schwann-cell-glucose-metabolism-by-mycobacterium-leprae
#17
Rychelle Clayde Affonso Medeiros, Karina do Carmo de Vasconcelos Girardi, Fernanda Karlla Luz Cardoso, Bruno de Siqueira Mietto, Thiago Gomes de Toledo Pinto, Lilian Sales Gomez, Luciana Silva Rodrigues, Mariana Gandini, Julio Jablonski Amaral, Sérgio Luiz Gomes Antunes, Suzana Corte-Real, Patricia Sammarco Rosa, Maria Cristina Vidal Pessolani, José Augusto da Costa Nery, Euzenir Nunes Sarno, Leonardo Ribeiro Batista-Silva, Mauro Sola-Penna, Marcus Fernandes Oliveira, Milton Ozório Moraes, Flavio Alves Lara
Mycobacterium leprae, the intracellular etiological agent of leprosy, infects Schwann promoting irreversible physical disabilities and deformities. These cells are responsible for myelination and maintenance of axonal energy metabolism through export of metabolites, such as lactate and pyruvate. In the present work, we observed that infected Schwann cells increase glucose uptake with a concomitant increase in glucose-6-phosphate dehydrogenase (G6PDH) activity, the key enzyme of the oxidative pentose pathway...
October 7, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27551724/comparison-of-maldi-tof-ms-nucleic-acid-hybridization-and-the-mpt64-immunochromatographic-test-for-the-identification-of-m-tuberculosis-and-non-tuberculosis-mycobacterium-species
#18
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
https://www.readbyqxmd.com/read/27516907/high-density-lipoprotein-binds-to-mycobacterium-avium-and-affects-the-infection-of-thp-1-macrophages
#19
Naoya Ichimura, Megumi Sato, Akira Yoshimoto, Kouji Yano, Ryunosuke Ohkawa, Takeshi Kasama, Minoru Tozuka
High-density lipoprotein (HDL) is involved in innate immunity toward various infectious diseases. Concerning bacteria, HDL is known to bind to lipopolysaccharide (LPS) and to neutralize its physiological activity. On the other hand, cholesterol is known to play an important role in mycobacterial entry into host cells and in survival in the intracellular environment. However, the pathogenicity of Mycobacterium avium (M. avium) infection, which tends to increase worldwide, remains poorly studied. Here we report that HDL indicated a stronger interaction with M...
2016: Journal of Lipids
https://www.readbyqxmd.com/read/27502041/identification-of-nontuberculous-mycobacteria-in-mgit-by-matrix-assisted-laser-desorption-ionization-mass-spectrometry
#20
Jung-Yien Chien, Chong-Jen Yu, Po-Ren Hsueh
AIM: The performance of Bruker Biotyper matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) in identifying species of nontuberculous mycobacteria (NTM) in flagged Mycobacteria Growth Indicator Tubes (MGIT)s is unclear. MATERIALS & METHODS: A total of 92 sequential MGIT-positive nontuberculous mycobacteria isolates, including Mycobacterium intracellulare, M. abscessus complex, M. avium complex and M. avium, were used to compare the performance of the MALDI-TOF MS for species-level identification with that of the BluePoint MycoID plus kit and final identification...
August 2016: Future Microbiology
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