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Mycobacterium avium

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https://www.readbyqxmd.com/read/29142508/proteomic-characterisation-of-bovine-and-avian-purified-protein-derivatives-and-identification-of-specific-antigens-for-serodiagnosis-of-bovine-tuberculosis
#1
José Antonio Infantes-Lorenzo, Inmaculada Moreno, María de Los Ángeles Risalde, Álvaro Roy, Margarita Villar, Beatriz Romero, Nieves Ibarrola, José de la Fuente, Eugenia Puentes, Lucía de Juan, Christian Gortázar, Javier Bezos, Lucas Domínguez, Mercedes Domínguez
Background: Bovine purified protein derivative (bPPD) and avian purified protein derivative (aPPD) are widely used for bovine tuberculosis diagnosis. However, little is known about their qualitative and quantitative characteristics, which makes their standardisation difficult. In addition, bPPD can give false-positive tuberculosis results because of sequence homology between Mycobacterium bovis (M. bovis) and M. avium proteins. Thus, the objective of this study was to carry out a proteomic characterisation of bPPD, aPPD and an immunopurified subcomplex from bPPD called P22 in order to identify proteins contributing to cross-reactivity among these three products in tuberculosis diagnosis...
2017: Clinical Proteomics
https://www.readbyqxmd.com/read/29140686/the-regulatory-mechanism-of-mycobacterium-tuberculosis-phosphoserine-phosphatase-serb2
#2
Gregory A Grant
Almost all organisms contain the same biosynthetic pathway for the synthesis of l-serine from the glycolytic intermediate, D-3-phosphoglycerate. However, regulation of this pathway varies from organism to organism. Many organisms control the activity of the first enzyme in the pathway, D-3-phosphoglyerate dehydrogenase (PGDH), by feedback inhibition through the interaction of l-serine with the ACT domains within the enzyme. The last enzyme in the pathway, phosphoserine phosphatase (PSP) has also been reported to be inhibited by l-serine...
November 15, 2017: Biochemistry
https://www.readbyqxmd.com/read/29129227/t-and-b-cell-activation-profiles-from-cows-with-and-without-johne-s-disease-in-response-to-in-vitro-stimulation-with-mycobacterium-avium-subspecies-paratuberculosis
#3
Meredith C Frie, Kelly R B Sporer, Brian W Kirkpatrick, Paul M Coussens
Johne's disease (JD) is a chronic wasting disease of ruminants caused by infection with Mycobacterium avium subspecies paratuberculosis (MAP). JD is particularly problematic on US dairy farms: estimates show that over 50% of farms are MAP-contaminated and as many as 91% of dairy herds could be infected. Although estimates vary widely, JD may cost the dairy industry between $200 million and $1.5 billion every year. One major obstacle to JD management is that JD is difficult to detect in many animals, in part due to the variable immunity against MAP demonstrated by JD+ cattle...
December 2017: Veterinary Immunology and Immunopathology
https://www.readbyqxmd.com/read/29121939/case-definition-terminology-for-paratuberculosis-johne-s-disease
#4
R J Whittington, D J Begg, K de Silva, A C Purdie, N K Dhand, K M Plain
Paratuberculosis (Johne's disease) is an economically significant condition caused by Mycobacterium avium subsp. paratuberculosis. However, difficulties in diagnosis and classification of individual animals with the condition have hampered research and impeded efforts to halt its progressive spread in the global livestock industry. Descriptive terms applied to individual animals and herds such as exposed, infected, diseased, clinical, sub-clinical, infectious and resistant need to be defined so that they can be incorporated consistently into well-understood and reproducible case definitions...
November 9, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/29121801/usefulness-of-chinese-herbal-medicines-as-host-directed-therapeutics-against-mycobacterial-infections-a-review
#5
Haruaki Tomioka
The high incidence of tuberculosis (TB) in developing countries, the resurgence of TB in industrialized countries, and the world-wide increase in the prevalence of Mycobacterium avium complex infections have prompted the quest for new antimycobacterial drugs. However, the development of such chemotherapeutics is currently making very slow progress. It therefore appears that devising improved administration protocols for clinical treatment against intractable mycobacteriosis using existing chemotherapeutics is more practical than awaiting the development of novel antimycobacterial drugs...
November 9, 2017: American Journal of Chinese Medicine
https://www.readbyqxmd.com/read/29120902/neutralizing-antiinterferon-%C3%AE-autoantibodies-causing-disseminated-mycobacterium-avium-complex-infection-in-an-hiv-infected-patient-on-successful-combination-antiretroviral-therapy
#6
Un-In Wu, Chien-Ching Hung, Sui-Yuan Chang, Yi-Ting Jhong, Hsin-Yun Sun, Jann-Tay Wang, Szu-Min Hsieh, Wang-Huei Sheng, Wen-Chun Liu, Shan-Chwen Chang, Yee-Chun Chen
No abstract text is available yet for this article.
November 28, 2017: AIDS
https://www.readbyqxmd.com/read/29109952/is-tb-testing-associated-with-increased-blood-interferon-gamma-levels
#7
Aideen E Kennedy, Jim O'Mahony, Noel Byrne, John MacSharry, Riona G Sayers
The Republic of Ireland reports a relatively low prevalence of Johne's disease (JD) compared to international counterparts. Postulated reasons for this include a lower average herd size and a grass-based production system. Ireland also engages in high levels of bovine tuberculosis (bTB) testing. As interferon-gamma (IFN-γ) is believed to play a key role in protecting against JD, it is our hypothesis that administration of purified protein derivative (PPD), as part of the bTB test, is associated with a systemic increase in IFN-γ production, which may potentially limit clinical progression of the disease...
2017: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/29109708/differential-identification-of-mycobacterial-species-using-high-resolution-melting-analysis
#8
Azar D Khosravi, Mohammad Hashemzadeh, Abdolrazagh Hashemi Shahraki, Ali Teimoori
Infections caused by non-tuberculous mycobacteria (NTM) is increasing wordwide. Due to the difference in treatment of NTM infections and tuberculosis, rapid species identification of mycobacterial clinical isolates is necessary for the effective management of mycobacterial diseases treatment and their control strategy. In this study, a cost-effective technique, real-time PCR coupled with high-resolution melting (HRM) analysis, was developed for the differentiation of Mycobacterial species using a novel rpoBC sequence...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29107584/first-molecular-typing-of-mycobacterium-avium-subspecies-paratuberculosis-identified-in-animal-and-human-drinking-water-from-dairy-goat-farms-in-brazil
#9
Isis F Espeschit, Marina C C Souza, Magna C Lima, Maria A S Moreira
Mycobacterium avium subspecies paratuberculosis, the etiologic agent of Johne's disease or paratuberculosis, was identified by culture and/or polymerase chain reaction (PCR) in 50% and 30% of water samples for animal and human consumption, respectively, from ten dairy goat farms in Brazil. IS1311 restriction fragment length polymorphism analysis identified the isolates as cattle type C.
October 12, 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/29098128/hot-tub-lung-a-diagnostic-challenge
#10
Hassaan Yasin, William E Mangano, Paras Malhotra, Ali Farooq, Hesham Mohamed
Hot tub lung (HTL) is a granulomatous lung disease thought to occur as a result of a hypersensitivity response to non-tuberculous mycobacteria (NTM). Typical radiographic findings are diffuse micronodular and/or ground glass opacities. We report an interesting case of HTL that presented with unique radiographic features, making its diagnosis a predicament. A 56-year-old immunocompetent female with chronic dyspnea and dry cough was found to have subcentimeter cavitary nodules, predominantly in the upper lung zones...
August 27, 2017: Curēus
https://www.readbyqxmd.com/read/29097994/benefits-of-genomic-insights-and-crispr-cas-signatures-to-monitor-potential-pathogens-across-drinking-water-production-and-distribution-systems
#11
Ya Zhang, Masaaki Kitajima, Andrew J Whittle, Wen-Tso Liu
The occurrence of pathogenic bacteria in drinking water distribution systems (DWDSs) is a major health concern, and our current understanding is mostly related to pathogenic species such as Legionella pneumophila and Mycobacterium avium but not to bacterial species closely related to them. In this study, genomic-based approaches were used to characterize pathogen-related species in relation to their abundance, diversity, potential pathogenicity, genetic exchange, and distribution across an urban drinking water system...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29097168/synthesis-and-biological-evolution-of-hydrazones-derived-from-4-trifluoromethyl-benzohydrazide
#12
Martin Krátký, Szilvia Bősze, Zsuzsa Baranyai, Jiřina Stolaříková, Jarmila Vinšová
Reflecting the known biological activity of isoniazid-based hydrazones, seventeen hydrazones of 4-(trifluoromethyl)benzohydrazide as their bioisosters were synthesized from various benzaldehydes and aliphatic ketones. The compounds were screened for their in vitro activity against Mycobacterium tuberculosis, nontuberculous mycobacteria (M. avium, M. kansasii), bacterial and fungal strains. The most antimicrobial potent derivatives were also investigated for their cytostatic and cytotoxic properties against three cell lines...
October 21, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/29093379/disseminated-cutaneous-infection-of-mycobacterium-colombiense-in-a-patient-with-myelodysplastic-syndrome-a-case-report
#13
Yuichiro Inagaki, Tatsuya Ito, Tomonori Kato, Yoshitaka Ono, Masashi Sawa
Mycobacterium colombiense (M. colombiense) is a member of the Mycobacterium avium complex (MAC). To our knowledge, this is the third case report of an M. colombiense infection. An 80-year-old man, immunocompromised by myelodysplastic syndrome (MDS), developed a skin rash with exfoliation and eruption on his face and scalp. Mycobacteria were detected in pus samples. Broad-range polymerase chain reaction (PCR) revealed the mycobacteria to be M. colombiense. The lesions resolved after daily administration of rifampicin, ethambutol, and clarithromycin...
November 1, 2017: Internal Medicine
https://www.readbyqxmd.com/read/29090657/mycobacterium-avium-subspecies-paratuberculosis-an-important-food-borne-pathogen-of-high-public-health-significance-with-special-reference-to-india-an-update
#14
Kundan Kumar Chaubey, Shoor Vir Singh, Saurabh Gupta, Manju Singh, Jagdip Singh Sohal, Naveen Kumar, Manoj Kumar Singh, Ashok Kumar Bhatia, Kuldeep Dhama
This review underlines the public health significance of 'Indian Bison Type' of Mycobacterium avium subspecies paratuberculosis (MAP) and also its potential as 'zoonotic infection'. In the absence of control programs, bio-load of MAP is increasing and if we take total population of animals (500 million plus) and human beings (1.23 billion plus) into account, the number of infected animals and human beings will run into millions in India. Our research on screening of over 26,000 domestic livestock for MAP infection using 4 different diagnostic tests (microscopy, culture, ELISA and PCR), during last 31 years has shown that the average bio-load of MAP in the livestock population of India is very high (cattle 43%, buffaloes 36%, goats 23% and sheep 41%)...
November 1, 2017: Veterinary Quarterly
https://www.readbyqxmd.com/read/29081589/identification-of-mycobacterium-avium-subspecies-paratuberculosis-strains-isolated-from-dairy-goats-and-dairy-sheep-in-ontario-canada
#15
Cathy A Bauman, Andria Jones-Bitton, Christina Ahlstrom, Lucy Mutharia, Jeroen De Buck, Jocelyn Jansen, David Kelton, Paula Menzies
The main objective of this study was to identify the circulating strains of Mycobacterium avium subspecies paratuberculosis (Map) in fecal isolates obtained from dairy goat (N = 29 farms) and dairy sheep (N = 21 farms) populations in Ontario, Canada. Further subtyping was performed to determine if there was adequate diversity between strains that could be used to establish Map transmission patterns. Type C was the dominant strain of Map isolates (95.2%) identified in dairy goats (n = 21). Sub-typing of the Type C strains, based on variable number tandem repeats (VNTR) and mycobacterial interspersed repetitive units, identified 3 VNTR types: INMV 1 (n = 10), INMV 2 (n = 10), and a type not previously identified (n = 1)...
October 2017: Canadian Journal of Veterinary Research, Revue Canadienne de Recherche Vétérinaire
https://www.readbyqxmd.com/read/29067283/small-molecule-mediated-restoration-of-mitochondrial-function-augments-anti-mycobacterial-activity-of-human-macrophages-subjected-to-cholesterol-induced-asymptomatic-dyslipidemia
#16
Suman Asalla, Krishnaveni Mohareer, Sharmistha Banerjee
Mycobacterium tuberculosis (M.tb) infection manifests into tuberculosis (TB) in a small fraction of the infected population that comprises the TB susceptible group. Identifying the factors potentiating susceptibility to TB persistence is one of the prime agenda of TB control programs. Recently, WHO recognized diabetes as a risk factor for TB disease progression. The closely related pathological state of metabolic imbalance, dyslipidemia, is yet another emerging risk factor involving deregulation in host immune responses...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/29062643/mycobacterium-avium-infection-after-acupoint-embedding-therapy
#17
Jiao Zhang, Linying Lai, Liming Liang, Xinyue Bai, Minliang Chen
Nontuberculous mycobacterium is a ubiquitous environmental organism that is unusual to cause a true infection, but it can cause severe cutaneous infections. In this case report, we present a successful treatment for a Chinese patient with Mycobacterium avium cutaneous infection after acupoint embedding therapy. We managed to conduct pathogenic detection, drug sensitive test, and multidisciplinary consultation. Finally, a systematic treatment strategy of nontuberculous mycobacterium was performed. Twenty-two-month follow-up revealed excellent outcome without any recurrence...
September 2017: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/29059250/causative-species-of-nontuberculous-mycobacterial-lung-disease-and-comparative-investigation-on-clinical-features-of-mycobacterium-abscessus-complex-disease-a-retrospective-analysis-for-two-major-hospitals-in-a-subtropical-region-of-japan
#18
COMPARATIVE STUDY
Hiroaki Nagano, Takeshi Kinjo, Yuichiro Nei, Shin Yamashiro, Jiro Fujita, Tomoo Kishaba
Nontuberculous mycobacteria (NTM) lung disease is increasing globally. Although the etiological epidemiology of NTM is different across regions, Mycobacterium avium complex (MAC) is the leading cause of NTM lung disease in most countries, including mainland Japan. Okinawa is located in the southernmost region of Japan and is the only prefecture categorized as a subtropical region in Japan, it is therefore likely the etiological epidemiology of NTM lung disease is different from mainland Japan. From 2009 to 2015, the medical records of patients, with respiratory specimens positive for NTMs, visiting or admitted to two Okinawan hospitals, were retrospectively analyzed...
2017: PloS One
https://www.readbyqxmd.com/read/29050776/blood-antimicrobial-activity-varies-against-different-mycobacterium-spp
#19
Octavio Miguel Rivero-Lezcano, Sara Blanco-Conde, Ramiro López-Medrano, Eduardo López-Fidalgo, Manuela Caño-Herrero, Teresa Nebreda-Mayoral
In vitro analysis of mycobacterial pathogenicity or host susceptibility has traditionally relied on the infection of macrophages, the target cell of mycobacteria, despite difficulties reproducing their antimycobacterial activity. We have employed alternative models, namely whole blood and leukocytes in plasma, from QuantiFERON negative individuals, and performed infections with the pathogenic M. tuberculosis, the less pathogenic M. avium, M. kansasii and M. chelonae and the occasionally pathogenic M. gordonae and M...
December 2017: Tuberculosis
https://www.readbyqxmd.com/read/29042494/insights-from-the-genome-sequence-of-mycobacterium-lepraemurium-massive-gene-decay-and-reductive-evolution
#20
Andrej Benjak, Tanvi P Honap, Charlotte Avanzi, Enrique Becerril-Villanueva, Iris Estrada-García, Oscar Rojas-Espinosa, Anne C Stone, Stewart T Cole
Mycobacterium lepraemurium is the causative agent of murine leprosy, a chronic, granulomatous disease similar to human leprosy. Due to the similar clinical manifestations of human and murine leprosy and the difficulty of growing both bacilli axenically, Mycobacterium leprae and M. lepraemurium were once thought to be closely related, although it was later suggested that M. lepraemurium might be related to Mycobacterium avium In this study, the complete genome of M. lepraemurium was sequenced using a combination of PacBio and Illumina sequencing...
October 17, 2017: MBio
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