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Mycobacterium avium complex

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https://www.readbyqxmd.com/read/28194371/non-tuberculous-mycobacteria-in-south-african-wildlife-neglected-pathogens-and-potential-impediments-for-bovine-tuberculosis-diagnosis
#1
Nomakorinte Gcebe, Tiny M Hlokwe
Non-tuberculous mycobacteria (NTM) are not only emerging and opportunistic pathogens of both humans and animals, but from a veterinary point of view some species induce cross-reactive immune responses that hamper the diagnosis of bovine tuberculosis (bTB) in both livestock and wildlife. Little information is available about NTM species circulating in wildlife species of South Africa. In this study, we determined the diversity of NTM isolated from wildlife species from South Africa as well as Botswana. Thirty known NTM species and subspecies, as well as unidentified NTM, and NTM closely related to Mycobacterium goodii/Mycobacterium smegmatis were identified from 102 isolates cultured between the years 1998 and 2010, using a combination of molecular assays viz PCR and sequencing of different Mycobacterial house-keeping genes as well as single nucleotide polymorphism (SNP) analysis...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28178715/infectious-causes-of-right-middle-lobe-syndrome
#2
Aatif Rashid, Sowmya Nanjappa, John N Greene
Right middle lobe (RML) syndrome is defined as recurrent or chronic obstruction or infection of the middle lobe of the right lung. Nonobstructive causes of middle lobe syndrome include inflammatory processes and defects in the bronchial anatomy and collateral ventilation. We report on 2 case patients with RML syndrome, one due to infection with Mycobacterium avium complex followed by M asiaticum infection and the other due to allergic bronchopulmonary aspergillosis. A history of atopy, asthma, or chronic obstructive pulmonary disease has been reported in up to one-half of those with RML...
January 2017: Cancer Control: Journal of the Moffitt Cancer Center
https://www.readbyqxmd.com/read/28169347/attenuation-of-lymphocyte-immune-responses-during-mycobacterium-avium-complex-induced-lung-disease-due-to-increasing-expression-of-programmed-death-1-on-lymphocytes
#3
Chin-Chung Shu, Jann-Yuan Wang, Ming-Fang Wu, Chen-Tu Wu, Hsin-Chih Lai, Li-Na Lee, Bor-Luen Chiang, Chong-Jen Yu
Mycobacterium avium complex-induced lung disease (MAC-LD) becomes important due to its increasing prevalence. Attenuated cellular immunity associated with programmed cell death (PD)-1 may play a pathophysiological role in MAC-LD but lacks of investigation. We enrolled 80 participants in this prospective study, including 50 with MAC-LD and 30 healthy controls. Peripheral blood mononuclear cells (PBMCs), lymphocytes and monocyte-derived macrophages were used for MAC antigen stimulation. Patients with MAC-LD had lower tumor necrosis factor-α and interferon-γ responses compared to the healthy controls in PBMC stimulation assays with MAC bacilli...
February 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28166858/genetic-diversity-of-mycobacterium-avium-complex-strains-isolated-in-argentina-by-miru-vntr
#4
B R Imperiale, R D Moyano, A B DI Giulio, M A Romero, M F Alvarado Pinedo, M P Santangelo, G E Travería, N S Morcillo, M I Romano
Mycobacterium avium sp. avium (MAA), M. avium sp. hominissuis (MAH), and M. avium sp. paratuberculosis (MAP) are the main members of the M. avium complex (MAC) causing diseases in several hosts. The aim of this study was to describe the genetic diversity of MAC isolated from different hosts. Twenty-six MAH and 61 MAP isolates were recovered from humans and cattle, respectively. GenoType CM® and IS1311-PCR were used to identify Mycobacterium species. The IS901-PCR was used to differentiate between MAH and MAA, while IS900-PCR was used to identify MAP...
February 7, 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/28163944/immune-reconstitution-inflammatory-syndrome-opening-pandora-s-box
#5
Mariana Meireles, Conceição Souto Moura, Margarida França
One of the purposes of antiretroviral therapy (ART) is to restore the immune system. However, it can sometimes lead to an aberrant inflammatory response and paradoxical clinical worsening known as the immune reconstitution inflammatory syndrome (IRIS). We describe a 23-year-old male, HIV1 infected with a rapid progression phenotype, who started ART with TCD4+ of 53 cells/mm(3) (3,3%) and HIV RNA = 890000 copies/mL (6 log). Four weeks later he was admitted to the intensive care unit with severe sepsis...
2017: Case Reports in Infectious Diseases
https://www.readbyqxmd.com/read/28150579/clinical-significance-of-the-radiological-severity-score-in-mycobacterium-avium-complex-lung-disease-patients
#6
K Furuuchi, A Ito, T Hashimoto, S Kumagai, T Ishida
<h2>SETTING:</h2><p>Practical methods for assessing the radiographic findings of Mycobacterium avium complex lung disease (MAC-LD) have not been established.</p><h2>OBJECTIVE:</h2><p>To identify a correlation between the radiological score and semi-quantitative culture results of respiratory samples, and to assess the prognostic impact of this radiological score in MAC-LD patients.</p><h2>DESIGN:</h2><p>We retrospectively studied 218 MAC-LD patients...
January 26, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28128073/nontuberculous-mycobacteria-overview
#7
Won-Jung Koh
Nontuberculous mycobacteria (NTM) are emerging pathogens that affect both immunocompromised and immunocompetent patients. The development of molecular methods has allowed the characterization of new species and the identification of NTM to the precise species and subspecies levels. The incidence and prevalence of NTM lung disease are increasing worldwide, and this syndrome accounts for the majority of clinical cases of NTM disease. Common causative organisms of pulmonary infection are the slowly growing mycobacteria Mycobacterium avium complex and Mycobacterium kansasii and the rapidly growing mycobacteria, including Mycobacterium abscessus complex...
January 2017: Microbiology Spectrum
https://www.readbyqxmd.com/read/28099547/primary-cutaneous-mycobacterium-avium-complex-infection-following-squamous-cell-carcinoma-excision
#8
Joseph Dyer, Jonathan Weiss, W Stephen Steiner, Julie A Barber
Primary cutaneous Mycobacterium avium complex (MAC) infection is rare, particularly among immunocompetent patients. We present the case of a purportedly healthy patient with primary cutaneous MAC infection arising within the excision margins of multiple infiltrating squamous cell carcinomas.
December 2016: Cutis; Cutaneous Medicine for the Practitioner
https://www.readbyqxmd.com/read/28069470/minimum-inhibitory-concentration-distributions-for-mycobacterium-avium-complex-towards-evidence-based-susceptibility-breakpoints
#9
Thomas Schön, Erja Chryssanthou
BACKGROUND: Patients with clinical infections caused by the Mycobacterium avium complex (MAC) are treated for at least 1 year following sputum conversion with a regimen that suffers from a suboptimal cure rate. The correlation between clinical outcome and drug susceptibility testing breakpoints other than for the macrolides is regarded to be poor. A systematic evaluation of clinical breakpoints for MAC has not been performed so far; thus, the aim of this study was to initiate the process by establishing minimum inhibitory concentration (MIC) distributions...
January 6, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/28063416/nontuberculous-mycobacterial-infection-in-rheumatoid-arthritis-patients-a-single-center-experience-in-south-korea
#10
Doo-Ho Lim, Yong-Gil Kim, Tae Sun Shim, Kyung-Wook Jo, Byeongzu Ghang, Soo Min Ahn, Seokchan Hong, Chang-Keun Lee, Bin Yoo
Background/Aims: Nontuberculous mycobacteria (NTM) infection has been increasing worldwide in both general population and immunocompromised patients, which has also been reported in rheumatoid arthritis (RA) patients. This study aimed to identify the incidence and clinical characteristics of NTM infection in RA patients living in tuberculosis (TB) infection endemic area. Methods: We performed a retrospective analysis of NTM infection cases in our RA registry at a tertiary referral center from January 1995 to December 2013...
January 6, 2017: Korean Journal of Internal Medicine
https://www.readbyqxmd.com/read/28056158/mycobacterium-avium-complex-septic-arthritis-presenting-as-osteonecrosis-of-the-femoral-head-in-a-patient-with-systemic-lupus-erythematosus
#11
Alexander B Christ, Elena V Zininberg, Kethy M Jules-Elysee, Michael L Parks
Mycobacterium avium complex is a rare cause of musculoskeletal infection, usually occurring in patients with compromised immune systems. Obtaining the diagnosis requires a high index of suspicion, and treatment can be delayed because of difficulty with isolating the organism. Treatment involves prolonged, targeted combination antibiotic therapy, and it is unclear whether eradication of the infection can occur in the presence of a foreign body, such as antibiotic spacers. The authors report a case of M avium infection presenting as presumed osteonecrosis of the femoral head in a young woman with systemic lupus erythematosus...
January 5, 2017: Orthopedics
https://www.readbyqxmd.com/read/28053669/mycobacterium-avium-subsp-paratuberculosis-and-associated-risk-factors-for-inflammatory-bowel-disease-in-iranian-patients
#12
Samin Zamani, Mohammad Reza Zali, Hamid Asadzadeh Aghdaei, Leonardo Antonio Sechi, Magdalena Niegowska, Elisa Caggiu, Rouhollah Keshavarz, Nader Mosavari, Mohammad Mehdi Feizabadi
BACKGROUND: Inflammatory bowel disease (IBD) is described as a relapsing condition with high morbidity and uncertain complex pathogenesis. The association of Mycobacterium avium ssp. paratuberculosis (MAP) with Crohn's disease (CD) in human has been debated for decades, however there is no confirmed data to verify such relations in Iran. The aim of this study was to investigate risk factors and a possible role of MAP in Iranian patients with CD. METHODS: Anti-MAP antibodies were detected in serum of IBD patients and subjects without IBD (nIBD) through ELISA; MAP DNA and viable MAP cells were identified in patients' biopsies through nested PCR and direct culture methods, respectively...
2017: Gut Pathogens
https://www.readbyqxmd.com/read/28043575/rapid-identification-of-mycobacterium-avium-ssp-paratuberculosis-laboratory-strains-by-is900-nested-polymerase-chain-reaction
#13
Mohammad Mohammad Taheri, Nader Mosavari, Mohammad Mehdi Feizabadi, Keyvan Tadayon, Rouholah Keshavarz, Reza Aref Pajoohi, Kioomars Soleimani, Shojaat Dashti Pour
INTRODUTION: Mycobacterium avium ssp paratuberculosis (MAP) causes paratuberculosis (Johne's disease) in ruminants. As a species, M. avium comprises M. avium subsp. hominissuis and a number of clones that are known to have evolved from this subspecies, namely M. avium subsp. avium (MAA), M. avium subsp. silvaticum, and MAP. Despite the very high genomic similarity of MAP and MAA, the insertion sequence IS900, which is 1,451-bp long, is now understood to be exclusively present in 10-20 copies in the genome of MAP...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28043565/drug-susceptibility-testing-of-mycobacterium-avium-subsp-avium-isolates-from-naturally-infected-domestic-pigeons-to-avian-tuberculosis
#14
Kaveh Parvandar, Mansour Mayahi, Nader Mosavari, Reza Aref Pajoohi
OBJECTIVE: Avian tuberculosis is one of the most important infections affecting most species of birds. Several mycobacterial species have been identified causing avian tuberculosis, and the organisms confirmed most frequently are Mycobacterium avium and Mycobacterium genavense. Any species of birds can be infected with M. avium. Generally, domesticated fowl or captive wild birds are affected more frequently than those living in the wild. M. avium can not only infect all species of birds, but can also infect some domesticated mammals to cause disease, usually with localized lesion...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28031437/antibody-levels-against-glycopeptidolipid-core-as-a-marker-for-monitoring-treatment-response-in-mycobacterium-avium-complex-pulmonary-disease-a-prospective-cohort-study
#15
Seigo Kitada, Ryoji Maekura, Kenji Yoshimura, Keisuke Miki, Mari Miki, Yohei Oshitani, Kohei Nishida, Nobuhiko Sawa, Masahide Mori, Kazuo Kobayashi
The diagnosis of Mycobacterium avium complex pulmonary disease (MAC-PD) is sometimes complicated and time-consuming. A serodiagnostic kit that measures the serum levels of IgA antibodies against the glycopeptidolipid (GPL) core is commercially available and has good diagnostic accuracy for MAC-PD. However, the significance of measurement of GPL core IgA antibody levels in monitoring for chemotherapy response in patients with MAC-PD was not well investigated.Thirty-four treatment naïve MAC-PD patients who were started on multidrug chemotherapy were enrolled...
December 28, 2016: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28012493/analysis-of-the-impact-of-lung-cancer-treatment-on-nontuberculous-mycobacterial-lung-diseases
#16
Taisuke Tsuji, Kazunari Tsuyuguchi, Kazunobu Tachibana, Yohei Kimura, Takehiko Kobayashi, Shojiro Minomo, Shinji Atagi, Akihide Matsumura, Seiji Hayashi, Katsuhiro Suzuki
BACKGROUND: Although nontuberculous mycobacteria (NTM) lung diseases can occur in association with lung cancer, no study has evaluated the effect of lung cancer treatment on NTM lung diseases. Therefore, the present study aimed to retrospectively examine the effect of lung cancer treatment on NTM lung diseases. METHODS: Patients diagnosed with NTM lung diseases in combination with cytologically or histologically proven lung cancer between January 1, 2010 and October 31, 2014 were enroled...
January 2017: Respiratory Investigation
https://www.readbyqxmd.com/read/28000919/antibiotic-treatment-for-nontuberculous-mycobacteria-lung-infection-in-people-with-cystic-fibrosis
#17
REVIEW
Valerie Waters, Felix Ratjen
BACKGROUND: Nontuberculous mycobacteria are mycobacteria, other than those in the Mycobacterium tuberculosis complex, and are commonly found in the environment. Nontuberculous mycobacteria species (most commonly Mycobacterium avium complex and Mycobacterium abscessus) are isolated from the respiratory tract of approximately 5% to 40% of individuals with cystic fibrosis; they can cause lung disease in people with cystic fibrosis leading to more a rapid decline in lung function and even death in certain circumstances...
19, 2016: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28000104/immune-reconstitution-inflammatory-syndrome-presenting-as-mycobacterium-avium-complex-lymphadenitis
#18
Ashley Matusz-Fisher, Wesley Bodie, Thomas Montgomery
No abstract text is available yet for this article.
December 20, 2016: Journal of General Internal Medicine
https://www.readbyqxmd.com/read/27984010/nothing-to-s-cough-at-pulmonary-mycobacterium-avium-complex-infection
#19
Michael A Santos, Hardikkumar Patel, Adam Albert
No abstract text is available yet for this article.
October 28, 2016: American Journal of Medicine
https://www.readbyqxmd.com/read/27971536/the-cost-of-remaining-ntm-positive-health-care-utilization-and-costs-in-a-sample-of-patients-with-refractory-pulmonary-disease-due-to-mycobacterium-avium-complex-in-canada-germany-united-kingdom-and-france
#20
S M Goring, N Risebrough, J B Wilson, J Watch, J R Gallagher, K J Heap, S Carroll, M Obradovic
No abstract text is available yet for this article.
November 2016: Value in Health: the Journal of the International Society for Pharmacoeconomics and Outcomes Research
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