Read by QxMD icon Read

Non tuberculosis mycobacteria

Nomakorinte Gcebe, Victor P M G Rutten, Nicolaas Gey van Pittius, Brendon Naicker, Anita L Michel
Some species of non-tuberculous mycobacteria (NTM) have been reported to be opportunistic pathogens of animals and humans. Recently there has been an upsurge in the number of cases of NTM infections, such that some NTM species are now recognized as pathogens of humans and animals. From a veterinary point of view, the major significance of NTM is the cross-reactive immune response they elicit against Mycobacterium bovis antigens, leading to misdiagnosis of bovine tuberculosis. Four NTM isolates were detected from a bovine nasal swab, soil and water, during an NTM survey in South Africa...
March 15, 2018: International Journal of Systematic and Evolutionary Microbiology
Ye-Jin Lee, Sung Koo Han, Ju Hee Park, Jung Kyu Lee, Deog Keom Kim, Hee Soon Chung, Eun Young Heo
Background/Aims: Patients with diabetes mellitus (DM) and tuberculosis (TB) have increased morbidity and a high risk of treatment failure or recurrence. It is important to manage both diseases simultaneously. Among anti-diabetic drugs, metformin inhibits intracellular growth of mycobacteria. Therefore, we examined the effects of metformin on TB treatment, especially in patients with DM. Methods: This retrospective cohort study included patients with culture-positive pulmonary TB diagnosed between 2011 and 2012...
March 16, 2018: Korean Journal of Internal Medicine
Ibrahim Abubakar, Rishi K Gupta, Molebogeng X Rangaka, Marc Lipman
No abstract text is available yet for this article.
March 14, 2018: American Journal of Respiratory and Critical Care Medicine
Divya Arora, Yogesh Chawla, Basanti Malakar, Archana Singh, Vinay Kumar Nandicoori
The cell wall of Mycobacterium tuberculosis (Mtb) is a complex structure that protects the pathogen in hostile environments. Peptidoglycan (PG), which helps determine the morphology of the cell envelope, undergoes substantial remodeling under stress. This meshwork of linear chains of sugars, crosslinked through attached peptides, is generated through the sequential action of enzymes termed transglycosylases and transpeptidases. The Mtb genome encodes two classical transglycosylases and four transpeptidases, the functions of which are not fully elucidated...
March 12, 2018: Journal of Biological Chemistry
Violeta D Alvarez-Jiménez, Kahiry Leyva-Paredes, Mariano García-Martínez, Luis Vázquez-Flores, Víctor Gabriel García-Paredes, Marcia Campillo-Navarro, Israel Romo-Cruz, Víctor Hugo Rosales-García, Jessica Castañeda-Casimiro, Sirenia González-Pozos, José Manuel Hernández, Carlos Wong-Baeza, Blanca Estela García-Pérez, Vianney Ortiz-Navarrete, Sergio Estrada-Parra, Jeanet Serafín-López, Isabel Wong-Baeza, Rommel Chacón-Salinas, Iris Estrada-García
Tuberculosis is an infectious disease caused by Mycobacterium tuberculosis (Mtb). In the lungs, macrophages and neutrophils are the first immune cells that have contact with the infecting mycobacteria. Neutrophils are phagocytic cells that kill microorganisms through several mechanisms, which include the lytic enzymes and antimicrobial peptides that are found in their lysosomes, and the production of reactive oxygen species. Neutrophils also release extracellular vesicles (EVs) (100-1,000 nm in diameter) to the extracellular milieu; these EVs consist of a lipid bilayer surrounding a hydrophilic core and participate in intercellular communication...
2018: Frontiers in Immunology
Ignacio Duarte
In the 19th century it was widely believed that both tuberculosis and cervical lymph node swelling, known as scrophula, affected individuals predisposed to an inherited "diathetic constitution". In 1882 Robert Koch proved that human tuberculosis and scrophulous lesions were caused by the bacillus Mycobacterium tuberculosis. In the early twentieth century it was stated that Mycobacterium bovis, the bacillus of cattle tuberculosis, could also cause cervical lymphoadenitis in humans, especially in children, by the intake of milk from sick cows...
December 2017: Revista Chilena de Infectología: órgano Oficial de la Sociedad Chilena de Infectología
Rashmi Gupta, Carolina R Felix, Matthew P Akerman, Kate J Akerman, Cathryn A Slabber, Wenjie Wang, Jessie Adams, Lindsey N Shaw, Yuk-Ching Tse-Dinh, Orde Q Munro, Kyle H Rohde
Mycobacterium tuberculosis ( Mtb ) and the fast-growing Mycobacterium abscessus ( Mab ) are two important human pathogens causing persistent pulmonary infections that are difficult to cure and require long treatment times. The emergence of drug resistant Mtb strains and the high level of intrinsic resistance of Mab calls for novel drug scaffolds that effectively target both pathogens. In this study, we have evaluated the activity of bis(pyrrolide-imine) gold(III) macrocycles and chelates, originally designed as DNA intercalators capable of targeting human topoisomerase I and II, against Mab and Mtb...
February 26, 2018: Antimicrobial Agents and Chemotherapy
Frances M Entwistle, Peter J Coote
PURPOSE: To evaluate the suitability of Galleria mellonella larvae as an in vivo model and drug-screening tool for mycobacteria infections. METHODOLOGY: Larvae were infected using a range of inoculum sizes from a variety of rapid-growing mycobacteria, including strains of M. fortuitum, M. marinum and M. aurum. Larval survival, internal bacterial burden and the effects of amikacin, ciprofloxacin, ethambutol, isoniazid and rifampicin treatment on larval survival were measured over 144 h...
February 13, 2018: Journal of Medical Microbiology
Delia Goletti, Meng-Rui Lee, Jann-Yuan Wang, Nicholas Walter, Tom H M Ottenhoff
Tuberculosis (TB) remains a devastating disease, yet despite its enormous toll on global health, tools to control TB are insufficient and often outdated. TB Biomarkers (TB-BM) would constitute extremely useful tools to measure infection status and predict outcome of infection, vaccination or therapy. There are several types of TB-BM: Correlate of Infection; Correlate of TB Disease; Correlate of Increased Risk of Developing Active TB Disease; Correlate of the Curative Response to Therapy; and Correlate of Protection (CoP)...
February 18, 2018: Respirology: Official Journal of the Asian Pacific Society of Respirology
Ciara Ordoñez, Hannah P Savage, Musharaf Tarajia, René Rivera, Cheyenne Weeks-Galindo, Dilcia Sambrano, Lee Riley, Patricia L Fernandez, Nicole Baumgarth, Amador Goodridge
Tuberculosis is an infectious disease caused by Mycobacterium tuberculosis. The cellular immune response to Mycobacteria has been characterized extensively, but the antibody response remains underexplored. The present study aimed to examine whether host or bacterial phospholipids induce secretion of IgM, and specifically anti-phospholipid IgM, antibodies by B cells and to identify the responsible B cell subset. Here we show that peritoneal B cells responded to lipid antigens by secreting IgM antibodies. Specifically, stimulation with Mycobacterium tuberculosis H37Rv total lipids resulted in significant induction of total and anti-phosphatidylcholine IgM...
February 18, 2018: Immunology
Maroudam Veerasami, K Venkataraman, Chitra Karuppannan, Arun Attur Shanmugam, Mallepaddi Chand Prudhvi, Thomas Holder, Polavarapu Rathnagiri, K Arunmozhivarman, Gopal Dhinakar Raj, Martin Vordermeier, B Mohana Subramanian
Tuberculosis is a significant problem globally for domestic animals as well as captive and free ranging wild life. Rapid point of care (POC) serology kits are well suited for the diagnosis of TB in wild animals. However, wild animals are invariably exposed to environmental non-pathogenic mycobacterium species with the development of cross reacting antibodies. In the present study, POC TB diagnosis kit was developed using a combination of pathogenic Mycobacteria specific recombinant antigens and purified protein derivatives of pathogenic and non-pathogenic Mycobacteria...
March 2018: Indian Journal of Microbiology
R Hermes, J Saragusty, I Moser, S Holtze, J Nieter, K Sachse, T Voracek, A Bernhard, T Bouts, F Göritz, T B Hildebrandt
Tuberculosis (TB) has been known to affect elephants for thousands of years. It was put into spotlight when few circus elephants were diagnosed carrying Mycobacterium (M.) tuberculosis. Because of the zoonotic risk and high susceptibility to M. tuberculosis, periodic testing was enacted since, in captive breeding programmes. Presently, trunk wash is the recommended diagnostic procedure for TB. Trunk wash, however, puts the operator at risk, has low sensitivity, and is prone to contamination. Here, bronchoalveolar lavage is described for the first time for TB diagnosis in elephants...
February 5, 2018: Epidemiology and Infection
Y A M El-Wajeh, M G Watson, D Igoumenakis, P Stathopoulos
This retrospective study covered over two decades, during which an individual head and neck surgeon treated 24 patients with cervicofacial lymphadenitis that was related to both Mycobacterium tuberculosis complex (n=17, made up of M tuberculosis (n=16) and M bovis (n=1)), and non-tuberculous mycobacteria. The seven cases of non-tuberculous mycobacteria were caused by M avium complex (n=3), M malmoense (n=3), and M kansaii (n=1). By using a tailored management approach, at times selective combined surgical and antimycobacterial treatment, he achieved a success rate of 23/24 cases, with only one recurrence and no major complications...
January 27, 2018: British Journal of Oral & Maxillofacial Surgery
Tsi-Shu Huang, Chia-Chien Lee, Hui-Zin Tu, Susan Shin-Jung Lee
BACKGROUND: Rapid identification of mycobacteria is important for timely treatment and the implementation of public health measures. The MGIT system ensures rapid detection of mycobacteria, but identification is usually delayed by days to weeks due to further subculture on solid medium. Matrix-assisted laser desorption time-of-flight mass spectrometry (MALDI-TOF MS) was demonstrated to effectively identify mycobacteria isolates subcultured from solid or liquid media. Reports of identification directly from MGIT broths of both sterile and non-sterile clinical specimens, omitting the subculture step, were limited and not satisfactory before...
2018: PloS One
Benedetta Terziroli Beretta-Piccoli, Carlo Mainetti, Marie-Astrid Peeters, Emmanuel Laffitte
Cutaneous granulomatosis is a heterogeneous group of diseases, characterized by a skin inflammatory reaction triggered by a wide variety of stimuli, including infections, foreign bodies, malignancy, metabolites, and chemicals. From a pathogenic point of view, they are divided into non-infectious and infectious granulomas. Pathophysiological mechanisms are still poorly understood. Non-infectious granulomatous skin diseases include granuloma annulare, necrobiosis lipoidica, rheumatic nodules, foreign body granulomas, cutaneous sarcoidosis, and interstitial granulomatous dermatitis...
February 2018: Clinical Reviews in Allergy & Immunology
B Kone, Y S Sarro, M Maiga, M Sanogo, A M Somboro, B Diarra, A C G Togo, N Coulibaly, B P P Dembele, D Goita, B Baya, A Kone, S Diabaté, M A Polis, M Belson, S Dao, S Orsega, C J Achenbach, R L Murphy, S Diallo, S Siddiqui
The global spread of non-tuberculous mycobacteria (NTM) may be due to HIV/AIDS and other environmental factors. The symptoms of NTM and tuberculosis (TB) disease are indistinguishable, but their treatments are different. Lack of research on the epidemiology of NTM infections has led to underestimation of its prevalence within TB endemic countries. This study was designed to determine the prevalence and clinical characteristics of pulmonary NTM in Bamako. A cross-sectional study which include 439 suspected cases of pulmonary TB...
January 15, 2018: Epidemiology and Infection
Mikihito Saito, Hajime Kasai, Kengo Shimazu, Takashi Urushibara, Tomohiko Iida, Toshihide Shinozaki
Acupuncture needles can cause non-tuberculosis mycobacteria (NTM) infection on the skin, but there are no reports that acupuncture needles inserted into the lung have caused lung NTM infection. A 63-year-old woman, who underwent removal of a broken acupuncture needle inserted into the lung nine years ago, was admitted with nodules in the right lung. The shadow was positioned where the needle had existed. Partial lung resection of the right lower lobe was performed, and the resected area showed caseous necrosis histopathologically...
January 2018: Respirology Case Reports
Bodil Jönsson, Elisabet Lönnermark, Malin Ridell
TB can be detected with PCR - but only in smear-positive respiratory samples Unnecessary and inappropriate clinical requests represent a great waste of time and money and may also result in false diagnoses. PCR-techniques, such as Cobas TaqMan MTB, are used for rapid detection of tuberculosis (TB).  These assays are only validated for respiratory specimens, but they are commonly requested also for non-respiratory specimens.  These assays perform well in smear-positive respiratory samples, while the sensitivities are quite unsatisfactory for both respiratory and non-respiratory smear-negatives samples...
January 9, 2018: Läkartidningen
Ngula Monde, Musso Munyeme, Adrian Muwonge, John Bwalya Muma, Sydney Malama
BACKGROUND: The non-tuberculous mycobacteria include those mycobacterium species that are not members of the Mycobacterium tuberculosis complex, the causative agent of pulmonary tuberculosis and Mycobacterium leprae. In Zambia, Non-tuberculous Mycobacteria are gaining recognition as pathogens of public health significance. However, there is scanty information on the isolation and speciation of these organisms for better patient management, consequently reducing the burden of these infections...
January 8, 2018: BMC Infectious Diseases
Anupop Jitmuang, Varah Yuenyongviwat, Keerati Charoencholvanich, Methee Chayakulkeeree
BACKGROUND: Prosthetic joint infection (PJI) is a major complication of total hip and total knee arthroplasty (THA, TKA). Although mycobacteria are rarely the causative pathogens, it is important to recognize and treat them differently from non-mycobacterial infections. This study aimed to compare the clinical characteristics, associated factors and long-term outcomes of mycobacterial and non-mycobacterial PJI. METHODS: We conducted a retrospective case-control study of patients aged ≥18 years who were diagnosed with PJI of the hip or knee at Siriraj Hospital from January 2000 to December 2012...
December 28, 2017: BMC Infectious Diseases
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"