keyword
MENU ▼
Read by QxMD icon Read
search

Non tuberculosis mycobacteria

keyword
https://www.readbyqxmd.com/read/28095429/high-rates-of-non-tuberculous-mycobacteria-isolation-in-mozambican-children-with-presumptive-tuberculosis
#1
Elisa López-Varela, Alberto L García-Basteiro, Orvalho J Augusto, Oscar Fraile, Helder Bulo, Tasmiya Ira, Kizito Gondo, Jakko van Ingen, Denise Naniche, Jahit Sacarlal, Pedro L Alonso
INTRODUCTION: Non-tuberculous mycobacteria (NTM) can cause disease which can be clinically and radiologically undistinguishable from tuberculosis (TB), posing a diagnostic and therapeutic challenge in high TB settings. We aim to describe the prevalence of NTM isolation and its clinical characteristics in children from rural Mozambique. METHODS: This study was part of a community TB incidence study in children <3 years of age. Gastric aspirate and induced sputum sampling were performed in all presumptive TB cases and processed for smear testing using fluorochrome staining and LED Microscopy, liquid and solid culture, and molecular identification by GenoType® Mycobacterium CM/AS assays...
2017: PloS One
https://www.readbyqxmd.com/read/28091937/ocular-mycobacteriosis-dual-infection-of-m-tuberculosis-complex-with-m-fortuitum-and-m-bovis
#2
Kusum Sharma, Natasha Gautam, Megha Sharma, Mohit Dogra, Priya Bajgai, Basavaraj Tigari, Aman Sharma, Vishali Gupta, Surya Prakash Sharma, Ramandeep Singh
BACKGROUND: We report unfavorable outcome in a patient with subretinal granuloma caused by dual infection of Mycobacterium tuberculosis complex with Mycobacterium fortuitum and Mycobacterium bovis in an immunosuppressed, non-HIV patient. We did a systematic review of literature on dual infection due to M. tuberculosis and M. fortuitum via MEDLINE and PUBMED and could not find any case reported of causing this kind of dual infection in the eye. RESULTS: A 38-year-old Indian male patient presented with decreased vision in the left eye for 3 months, diagnosed as tubercular choroidal granuloma with associated retinal angiomatosis proliferans (RAP) lesion...
December 2017: Journal of Ophthalmic Inflammation and Infection
https://www.readbyqxmd.com/read/28087944/laboratory-diagnosis-and-susceptibility-testing-for-mycobacterium-tuberculosis
#3
Gary W Procop
The laboratory, which utilizes some of the most sophisticated and rapidly changing technologies, plays a critical role in the diagnosis of tuberculosis. Some of these tools are being employed in resource-challenged countries for the rapid detection and characterization of Mycobacterium tuberculosis. Foremost, the laboratory defines appropriate specimen criteria for optimal test performance. The direct detection of mycobacteria in the clinical specimen, predominantly done by acid-fast staining, may eventually be replaced by rapid-cycle PCR...
December 2016: Microbiology Spectrum
https://www.readbyqxmd.com/read/28075556/biosynthesis-of-the-methylthioxylose-capping-motif-of-lipoarabinomannan-in-mycobacterium-tuberculosis
#4
Shiva Kumar Angala, Michael R McNeil, Libin Shi, Maju Joe, Ha Pham, Sophie Zuberogoitia, Jerome Nigou, Claudia M Boot, Todd L Lowary, Martine Gilleron, Mary Jackson
Lipoarabinomannan (LAM) is a lipoglycan found in abundant quantities in the cell envelope of all mycobacteria. The non-reducing arabinan termini of LAM display species-specific structural micro-heterogeneity that impacts the biological activity of the entire molecule. Mycobacterium tuberculosis, for instance, produces mannoside caps made of one to three α(1→2)-Manp-linked residues that may be further substituted with an α(1→4)-linked methylthio-D-xylose (MTX) residue. While the biological functions and catalytic steps leading to the formation of the mannoside caps of M...
January 11, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/28060290/visualization-of-the-charcoal-agar-resazurin-assay-for-semi-quantitative-medium-throughput-enumeration-of-mycobacteria
#5
Ben Gold, Julia Roberts, Yan Ling, Landys Lopez Quezada, Jou Glasheen, Elaine Ballinger, Selin Somersan-Karakaya, Thulasi Warrier, Carl Nathan
There is an urgent need to discover and progress anti-infectives that shorten the duration of tuberculosis (TB) treatment. Mycobacterium tuberculosis, the etiological agent of TB, is refractory to rapid and lasting chemotherapy due to the presence of bacilli exhibiting phenotypic drug resistance. The charcoal agar resazurin assay (CARA) was developed as a tool to characterize active molecules discovered by high-throughput screening campaigns against replicating and non-replicating M. tuberculosis. Inclusion of activated charcoal in bacteriologic agar medium helps mitigate the impact of compound carry-over, and eliminates the requirement to pre-dilute cells prior to spotting on CARA microplates...
December 14, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28043548/discordance-between-genexpert-assay-and-conventional-drug-susceptibility-testing-in-detecting-rifampicin-resistant-tuberculosis-a-perspective-of-the-line-probe-assay
#6
Ruqaya M Ali, Ahmed A Alsudani
BACKGROUND: Early detection for tuberculosis (TB) and rifampicin-resistant TB (RRTB) is crucial for proper control of this disease. WHO recommended the use of the GeneXpert assay at district level to cover these two public health demands? A study evaluated the diagnostic impact of the GeneXpert assay in detecting TB and RRTB. Odd results were observed in this study in the form of discordance between the GeneXpert assay and the conventional culture and drug-susceptibility testing (DST)...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28036246/down-regulation-of-pe11-a-cell-wall-associated-esterase-enhances-the-biofilm-growth-of-mycobacterium-tuberculosis-and-reduces-cell-wall-virulence-lipid-levels
#7
Shivangi Rastogi, Amit Kumar Singh, Garima Pant, Kalyan Mitra, Koneni V Sashidhara, Manju Y Krishnan
PE11 (Rv1169c or LipX) is a cell wall associated esterase/lipase of Mycobacterium tuberculosis(Mtb). Evidences suggest that PE11 is expressed by Mtb both in vitro and in vivo. Previous studies have shown that when expressed in the non-pathogenic surrogate M. smegmatis, PE11 leads to modification in cell wall lipid content and enhanced virulence. Since cell wall lipids often play different roles in pathogenic and non-pathogenic mycobacteria, we investigated the role of PE11 in its host, Mtb. Mtb with lowered expression of PE11 (PE11 knock-down) displayed significant changes in colony morphology and cell wall lipid profile, confirming the role of PE11 in cell wall architecture...
December 30, 2016: Microbiology
https://www.readbyqxmd.com/read/28031850/isolated-mycobacterium-kansasii-wound-infection-and-osteomyelitis-in-an-immunocompetent-patient
#8
Tarek Turk, Mohamed Faher Almahmoud, Khulood Raslan
Mycobacterium kansasii is a slow growing acid-fast non-tuberculosis mycobacterium. It most commonly causes pulmonary disease with tuberculosis-like manifestations. Mycobacterium kansasii-induced skin and soft tissue infections (SSTIs) are very uncommon, especially in the absence of obvious risk factors. In this report, we present a rare case of M. kansasii-associated SSTI complicated by tendonitis and osteomyelitis in an immunocompetent patient. This case highlights the importance of considering non-tuberculosis mycobacteria while investigating chronic, relapsing, non-healing SSTIs and osteomyelitis...
November 2016: Oxford Medical Case Reports
https://www.readbyqxmd.com/read/28028468/the-tuberculocidal-activity-of-polyaniline-and-functionalised-polyanilines
#9
Julia Robertson, James Dalton, Siouxsie Wiles, Marija Gizdavic-Nikolaidis, Simon Swift
Tuberculosis is considered a leading cause of death worldwide. More than 95% of cases and deaths occur in low- and middle-income countries. In resource-limited countries, hospitals often lack adequate facilities to manage and isolate patients with infectious tuberculosis (TB), relying instead on personal protective equipment, such as facemasks, to reduce nosocomial transmission of the disease. Facemasks impregnated with an antimicrobial agent may be a cost-effective way of adding an extra level of protection against the spread of TB by reducing the risk of disease transmission...
2016: PeerJ
https://www.readbyqxmd.com/read/27997817/on-the-reportability-of-nontuberculous-mycobacterial-disease-to-public-health-authorities
#10
Kevin L Winthrop, Emily Henkle, Aryn Walker, Maureen Cassidy, Katrina Hedberg, Sean Schafer
Nontuberculous mycobacteria (NTM) are environmental pathogens that are an increasingly common cause of pulmonary and extrapulmonary disease. Electronic laboratory-based reporting is a straightforward mechanism for identifying NTM infections, and for monitoring trends in disease. Oregon was the first state to make NTM reportable, although at this time the reporting requirement is limited to extrapulmonary infection. This has assisted authorities in detecting outbreaks and healthcare-related infections. Further consideration should be given to the reportability of pulmonary NTM disease...
December 20, 2016: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/27996281/il-12r%C3%AE-1-defect-presenting-with-massive-intraabdominal-lymphadenopathy-due-to-mycobacterium-intracellulare-a-case-report
#11
Eda Kepenekli Kadayifci, Ayşe Karaaslan, Serkan Atici, Gülşen Akkoç, Safa Bariş, Nurhayat Yakut, Sevliya Öcal Demir, Orhan Kaya KÖksalan, Ahmet Soysal, Caroline Deswarte, Jacinta Bustamante, Jean-Laurent Casanova, Mustafa Bakir
Infections due to non-tuberculous mycobacteria species are problematic for people who have immundeficiency. Mendelian Susceptibility to Mycobacterial Diseases (MSMD) defines a group of genetic defects affecting cellular interactions and IFN-γ pathway. Patients with MSMD may present with disseminated infection due to Bacillus Calmette-Guerin vaccine strain, Mycobacterium tuberculosis complex, environmental NTM or Salmonella species. Atypical mycobacterial infections and deficient granuloma/giant-cell formation are important clues for MSMD especially in patients with the history of parental consanguineous marriage...
December 12, 2016: Asian Pacific Journal of Allergy and Immunology
https://www.readbyqxmd.com/read/27934821/drug-susceptibility-of-rapid-and-slow-growing-non-tuberculous-mycobacteria-isolated-from-symptomatics-for-pulmonary-tuberculosis-central-india
#12
B Goswami, P Narang, P S Mishra, R Narang, U Narang, D K Mendiratta
BACKGROUND: Non-tuberculous mycobacteria (NTM) are emerging as important pathogens. Their treatment also differs from that of Mycobacterium tuberculosis. In India, any datum on them is scarce as species identification and drug susceptibility are not performed in most laboratories. Susceptibility also differs from one geographic area to another, and in our country, there are no data even to guide the clinicians to start treatment empirically. METHODOLOGY: The present study endeavours to generate drug susceptibility data on NTM isolated from sputum samples collected and stored from 6445 symptomatics for pulmonary tuberculosis during a prevalence survey and from specimens received from the hospital...
October 2016: Indian Journal of Medical Microbiology
https://www.readbyqxmd.com/read/27926825/mycobacterium-malmesburyense-sp-nov-a-novel-non-tuberculous-mycobacterium-species-revealed-by-multiple-gene-sequence-characterization
#13
Nomakorinte Gcebe, Victor Rutten, Nicolaas Gey van Pittius, Brendon Naicker, Anita Michel
Non-tuberculous mycobacteria (NTM) are ubiquitous in the environment and an increasing number of NTM species have been isolated and characterized from both humans and animals, highlighting the zoonotic potential of these bacteria. Host exposure to NTM may impact on cross-reactive immune responsiveness which may affect diagnosis of bovine tuberculosis and may also play a role in the variability of the efficacy of Mycobacterium bovis BCG vaccination against tuberculosis. In this study we characterized 10 NTM isolates originating from water, soil, nasal swabs of cattle and African buffalo as well as bovine tissue samples...
December 5, 2016: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/27914739/infection-by-mycobacterium-bovis-in-a-dog-from-brazil
#14
Vivianne Cambuí Figueiredo Rocha, Salomão Cambuí de Figueiredo, Cesar Alejandro Rodriguez Rosales, Camila Dias Porto, Julio Lopes Sequeira, José Soares Ferreira Neto, Antônio Carlos Paes, Vanessa Riesz Salgado
Tuberculosis (TB) is a chronic disease caused by bacteria belonging to the Mycobacterium tuberculosis complex (MtbC). This disease rarely affects dogs. Canine infections are usually caused by M. tuberculosis. Mycobacterium bovis infections are rare in dogs and associated with consumption of raw milk or contaminated products. Here, we report a Boxer dog who had a M. bovis infection and was admitted to a Brazilian veterinary hospital with a presumptive diagnosis of chronic ehrlichiosis. Despite receiving treatment for chronic ehrlichiosis, it progressed to death...
January 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/27909634/nontuberculous-mycobacteria-lymphadenitis-a-case-report
#15
Amanda M Krantz, Meera Varnam, Cristina Fernandez
Atypical mycobacteria, also known as nontuberculous mycobacteria (NTM) includes acid-fast bacteria other than Mycobacterium tuberculosis. NTM can be isolated from a variety of environmental sources including water, food products, domestic animals, and soil; human exposure is typically from soil to the oral cavity and respiratory tract. Diagnosis of NTM is suspected in children less than five years old with subacute, unilateral, non-tender cervicofacial lymphadenitis in combination with a history of water exposure, penetrating injection, as well as negative routine cultures or response to antistaphylococcal and antistreptococcal antibiotics...
October 25, 2016: Curēus
https://www.readbyqxmd.com/read/27876877/evaluation-of-the-efficacy-of-myco-f-lytic-system-mgit960-system-and-lowenstein-jensen-medium-for-recovery-of-mycobacterium-tuberculosis-from-sterile-body-fluids
#16
Guirong Wang, Xinting Yang, Junping Zhu, Weijie Dong, Mailing Huang, Guanglu Jiang, Liping Zhao, Sibing Qin, Xiaoyou Chen, Hairong Huang
The diagnosis of extrapulmonary tuberculosis (EPTB) is challenging due to non-specific symptoms, invasive approach for specimen collection and most importantly, the paucibacillary status. The objective of this assay was to evaluate the efficacy of Myco/F lytic system, BACTEC Mycobacteria Growth Indicator Tube (MGIT) 960 system and Lowenstein-Jensen (L-J) medium for recovery of bacilli from sterile body fluids. 214 specimens (114 pleural fluid and 100 pus) from clinically diagnosed EPTB patients were collected and subjected to Ziehl-Neelsen (ZN) smear microscopy, L-J culture, MGIT 960 culture and Myco/F lytic culture...
November 23, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27866220/molecular-basis-of-mycobacterial-survival-in-macrophages
#17
REVIEW
Jane Atesoh Awuh, Trude Helen Flo
Macrophages play an essential role in the immune system by ingesting and degrading invading pathogens, initiating an inflammatory response and instructing adaptive immune cells, and resolving inflammation to restore homeostasis. More interesting is the fact that some bacteria have evolved to use macrophages as a natural habitat and tools of spread in the host, e.g., Mycobacterium tuberculosis (Mtb) and some non-tuberculous mycobacteria (NTM). Mtb is considered one of humanity's most successful pathogens and is the causal agent of tuberculosis, while NTMs cause opportunistic infections all of which are of significant public health concern...
November 19, 2016: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/27831584/the-development-of-small-molecule-modulators-for-clpp-protease-activity
#18
REVIEW
Fei Ye, Jiahui Li, Cai-Guang Yang
The global spread of antibiotic resistance among important human pathogens emphasizes the need to find new antibacterial drugs with a novel mode of action. The ClpP protease has been shown to demonstrate its pivotal importance to both the survival and the virulence of pathogenic bacteria during host infection. Deregulating ClpP activity either through overactivation or inhibition could lead to antibacterial activity, declaiming the dual molecular mechanism for small-molecule modulation. Recently, natural products acyldepsipeptides (ADEPs) have been identified as a new class of antibiotics that activate ClpP to a dysfunctional state in the absence of cognate ATPases...
December 20, 2016: Molecular BioSystems
https://www.readbyqxmd.com/read/27828618/a-decade-trend-of-multidrug-resistant-tuberculosis-in-s%C3%A3-o-paulo-state-brazil
#19
Valdes Roberto Bollela, Fernanda Guioti Puga, Maria Janete Moya, Mauro Andrea, Maria de Lourdes Viude Oliveira
The aim of this retrospective study was to review all the notified cases of multidrug-resistant tuberculosis (MDR-TB) in São Paulo State (Brazil), as well as to describe and discuss the clinical, microbiological and radiologic aspects in a single reference center, within the same state, from 2000 to 2012. There were 1,097 notifications of MDR-TB in São Paulo State over this period, 70% affecting men aged on average 38 years (10-77). There was a significant fall in the MDR-TB mortality rate from 30% to 8% (2000-2003 versus 2009-2012)...
November 3, 2016: Revista do Instituto de Medicina Tropical de São Paulo
https://www.readbyqxmd.com/read/27826888/non-tuberculous-mycobacteria-classification-diagnostics-and-therapy
#20
I Porvaznik, I Solovič, J Mokrý
Non-tuberculous mycobacteria (NTM) are species other than those belonging to the Mycobacterium tuberculosis complex and do not cause leprosy. NTM are generally free-living organisms that are ubiquitous in the environment. There have been more than 140 NTM species identified to-date. They can cause a wide range of infections, with pulmonary infections being the most frequent (65-90 %). There is growing evidence that the incidence of NTM lung diseases and associated hospitalizations are on the rise, mainly in regions with a low prevalence of tuberculosis...
2017: Advances in Experimental Medicine and Biology
keyword
keyword
66911
1
2
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"