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https://www.readbyqxmd.com/read/29757583/what-immunological-defects-predispose-to-non-tuberculosis-mycobacterial-infections
#1
Esmaeil Mortaz, Milad Moloudizargari, Mohammad Varahram, Mehrnaz Movassaghi, Johan Garssen, Mehdi Kazempour Dizagie, Mehdi Mirsaeidi, Ian M Adcock
Nontuberculous mycobacteria (NTM) are categorized as one of the large and diverse groups of environmental organisms which are abundant in water and soil.  NTM cause a variety of diseases in humans that mainly affect the lung. A predisposition to pulmonary NTM is evident in patients with parenchymal structural diseases including bronchiectasis, emphysema, tuberculosis (TB), cystic fibrosis (CF), rheumatologic lung diseases and other chronic diseases with pulmonary manifestations. Lung infections are not the only consequences of being infected by NTM as they can also infect skin and soft tissue and may also cause lymphadenitis (predominantly in young children) and disseminated disease in human immunodeficiency virus (HIV)-infected patients or those with severely compromised immune system...
April 2018: Iranian Journal of Allergy, Asthma, and Immunology
https://www.readbyqxmd.com/read/29757395/genotyping-and-whole-genome-sequencing-to-identify-tuberculosis-transmission-to-pediatric-patients-in-british-columbia-canada-2005-2014
#2
Jennifer L Guthrie, Andy Delli Pizzi, David Roth, Clare Kong, Danielle Jorgensen, Mabel Rodrigues, Patrick Tang, Victoria J Cook, James Johnston, Jennifer L Gardy
Background: Tuberculosis (TB) in children is often an indicator of recent transmission. Genotyping and whole genome sequencing (WGS) can enhance pediatric TB investigations by confirming or refuting transmission events. Methods: Mycobacterium tuberculosis isolates from all pediatric patients <18 years with culture-confirmed TB in British Columbia (BC) from 2005-2014 (n=49) were genotyped by MIRU-VNTR and compared to adult isolates. Genotypically clustered cases underwent WGS...
May 11, 2018: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29752313/schistosomiasis-induces-persistent-dna-methylation-and-tuberculosis-specific-immune-changes
#3
Andrew R DiNardo, Tomoki Nishiguchi, Emily M Mace, Kimal Rajapakshe, Godwin Mtetwa, Alexander Kay, Gugu Maphalala, W Evan Secor, Rojelio Mejia, Jordan S Orange, Cristian Coarfa, Kapil N Bhalla, Edward A Graviss, Anna M Mandalakas, George Makedonas
Epigenetic mechanisms, such as DNA methylation, determine immune cell phenotype. To understand the epigenetic alterations induced by helminth coinfections, we evaluated the longitudinal effect of ascariasis and schistosomiasis infection on CD4+ T cell DNA methylation and the downstream tuberculosis (TB)-specific and bacillus Calmette-Guérin-induced immune phenotype. All experiments were performed on human primary immune cells from a longitudinal cohort of recently TB-exposed children. Compared with age-matched uninfected controls, children with active Schistosoma haematobium and Ascaris lumbricoides infection had 751 differentially DNA-methylated genes, with 72% hypermethylated...
May 11, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29751121/evaluation-of-dried-blood-spot-sampling-for-pharmacokinetic-research-and-therapeutic-drug-monitoring-of-anti-tuberculosis-drugs-in-children
#4
Lisa C Martial, Jordy Kerkhoff, Nilza Martinez, Mabel Rodríguez, Rosarito Coronel, Gladys Molinas, Myriam Roman, Roscio Gomez, Sarita Aguirre, Erwin Jongedijk, Justine Huisman, Daan J Touw, Domingo Pérez, Gilberto Chaparro, Felipe Gonzalez, Rob E Aarnoutse, Jan-Willem Alffenaar, Cecile Magis-Escurra
BACKGROUND: Dried blood spot sampling (DBS) for pharmacokinetic (PK) studies and Therapeutic Drug Monitoring has unique advantages over venous sampling. We aimed to evaluate a DBS method for first-line anti-TB drugs in children, implemented DBS to assess PK parameters. METHODS: Paraguayan children were treated according to the revised paediatric WHO dosing scheme. A PK curve was performed both with DBS and conventional venous sampling for rifampicin, pyrazinamide and ethambutol...
May 8, 2018: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/29750764/linezolid-containing-treatment-regimens-for-tuberculosis-in-children
#5
Luis M Prieto, Begoña Santiago, Teresa Del Rosal, Begoña Carazo, Ana B Jiménez, Beatriz Pérez-Gorricho, Felipe Rubio, Alfredo Tagarro, Daniel Blázquez, David Moreno-Pérez, María J Mellado, Fernando Baquero-Artigao
BACKGROUND: In recent years there is an increasing interest in the use of linezolid for the treatment of tuberculosis (TB). METHODS: Patients under 18 years of age who received linezolid within the Spanish Pediatric TB Network (pTBred) from 2001 to 2016 were retrospectively included. Treatment characteristics, adverse events (AEs) and outcomes were analyzed. RESULTS: Fifteen children were included (53% male) with a median age of 3.6 years (IQR: 1...
May 10, 2018: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/29750144/towards-the-elimination-of-paediatric-tuberculosis-in-high-income-immigrant-receiving-countries-a-25-year-conventional-and-molecular-epidemiological-case-study
#6
Vivek Dhawan, Jennifer Bown, Angela Lau, Deanne Langlois-Klassen, Dennis Kunimoto, Ravi Bhargava, Linda Chui, Simon M Collin, Richard Long
The epidemiology of tuberculosis (TB) in high-income countries is increasingly dictated by immigration. The influence of this trend on paediatric TB and TB elimination are not well defined. We undertook a 25-year conventional and molecular epidemiologic study of paediatric TB in Alberta, one of four major immigrant-receiving provinces in Canada. All isolates of Mycobacterium tuberculosis were DNA fingerprinted using standard methodology. Between 1990 and 2014, 176 children aged 0-14 years were diagnosed with TB...
April 2018: ERJ Open Research
https://www.readbyqxmd.com/read/29743059/enhanced-surveillance-for-tuberculosis-among-foreign-born-persons-finland-2014-2016
#7
Pirre E Räisänen, Hanna Soini, Pirjo Turtiainen, Tuula Vasankari, Petri Ruutu, J Pekka Nuorti, Outi Lyytikäinen
BACKGROUND: Tuberculosis (TB) in foreign-born residents is increasing in many European countries including Finland. We conducted enhanced TB surveillance to collect supplementary information on TB cases among recent immigrants and their children to provide data for revising TB control policies in Finland to take into account the decrease in native cases and increase in foreign-born cases. METHODS: TB cases were identified from the National Infectious Diseases Register...
May 9, 2018: BMC Public Health
https://www.readbyqxmd.com/read/29742144/mpt64-antigen-detection-test-improves-routine-diagnosis-of-extrapulmonary-tuberculosis-in-a-low-resource-setting-a-study-from-the-tertiary-care-hospital-in-zanzibar
#8
Melissa Davidsen Jørstad, Msafiri Marijani, Anne Ma Dyrhol-Riise, Lisbet Sviland, Tehmina Mustafa
BACKGROUND: Extrapulmonary tuberculosis (EPTB) is a diagnostic challenge. An immunochemistry-based MPT64 antigen detection test (MPT64 test) has reported higher sensitivity in the diagnosis of EPTB compared with conventional methods. The objective of this study was to implement and evaluate the MPT64 test in routine diagnostics in a low-resource setting. METHODS: Patients with presumptive EPTB were prospectively enrolled at Mnazi Mmoja Hospital, Zanzibar, and followed to the end of treatment...
2018: PloS One
https://www.readbyqxmd.com/read/29742052/clinical-and-drug-resistance-characteristics-of-new-pediatric-tuberculosis-cases-in-northern-china
#9
Ting Wang, Fang Dong, Qin-Jing Li, Qing-Qin Yin, Wen-Qi Song, Igor Mokrousov, Wei-Wei Jiao, A-Dong Shen
AIM: The aim of this study was to evaluate the clinical features and characteristics of drug resistance in newly diagnosed pediatric tuberculosis (TB) patients in northern China. METHODS: Mycobacterium tuberculosis isolates were collected from September 2010 to October 2016 at the Beijing Children's Hospital. Patients were divided into two groups (resistant to at least one drug and pan-susceptible) according to drug susceptibility testing (DST) results. RESULTS: A total of 132 new cases, mainly from northern China (87...
May 9, 2018: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29740714/xpert-mtb-rif-diagnosis-of-childhood-tuberculosis-from-sputum-and-stool-samples-in-a-high-tb-hiv-prevalent-setting
#10
Patrick Orikiriza, Margaret Nansumba, Dan Nyehangane, Mathieu Bastard, Ivan Taremwa Mugisha, Denis Nansera, Juliet Mwanga-Amumpaire, Yap Boum, Elias Kumbakumba, Maryline Bonnet
The Xpert MTB/RIF assay is a major advance for diagnosis of tuberculosis (TB) in high-burden countries but is limited in children by their difficulty to produce sputum. We investigated TB in sputum and stool from children with the aim of improving paediatric TB diagnosis. A prospective cohort of children with presumptive TB, provided two sputum or induced sputum at enrolment in a regional referral hospital in Uganda. Stool was collected from those started on TB treatment. All specimen were tested for Xpert MTB/RIF, mycobacteria growth indicator tube (MGIT), Lowenstein Jensen cultures and microscopy (except stool)...
May 8, 2018: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/29731933/latent-tuberculosis-infection-diagnosis-and-treatment
#11
Biljana Ilievska-Poposka, Marija Metodieva, Maja Zakoska, Cveta Vragoterova, Dejan Trajkov
INTRODUCTION: Latent tuberculosis infection (LTBI) is defined as a state of persistent immune response to stimulation by Mycobacterium tuberculosis antigens without evidence of clinically manifested active tuberculosis (TB). Diagnosis and treatment for LTBI are important for TB, especially in high-risk populations. Tuberculin skin test (TST) and interferon-gamma release assays (IGRAs) are used to diagnose LTBI. AIM: The study aims to present the first results with IGRA test compared with TST in the screening of LTBI and the treatment results in the cases with LTBI in Macedonia...
April 15, 2018: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/29731926/practical-approach-to-lung-health-experience-from-the-republic-of-macedonia
#12
Biljana Ilievska-Poposka, Maja Zakoska, Stefan Talevski
BACKGROUND: Among the adults and children aged 5 yrs who attend PHC settings, 20-30% seeks to care for respiratory symptoms. Over 80-90% of the respiratory patients suffer from acute respiratory infections (ARI), followed by chronic obstructive pulmonary diseases (COPD), asthma, and less frequently with pneumonia and tuberculosis (TB). To improve the quality of care in patients who seek assistance for respiratory symptoms in PHC settings and the efficiency of respiratory service delivery within healthcare systems, WHO has designated several initiatives among which one is PAL (Practical Approach to Lung Health)...
April 15, 2018: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/29728429/interferon-%C3%AE-release-assay-performance-for-tuberculosis-in-childhood
#13
Alexander W Kay, Shamim M Islam, Kristen Wendorf, Janice Westenhouse, Pennan M Barry
BACKGROUND: Interferon-γ release assays (IGRAs) are important adjunctive tests for diagnosing tuberculosis (TB) disease in children. METHODS: We analyzed California TB registry data for patients ≤18 years with laboratory-confirmed TB disease during 2010-2015 to identify case characteristics associated with test selection and performance and measure IGRA sensitivity. RESULTS: In total, 778 cases of TB were reported; 360 were laboratory confirmed...
May 4, 2018: Pediatrics
https://www.readbyqxmd.com/read/29726023/the-determination-of-capreomycin-in-human-plasma-by-lc-ms-ms-using-ion-pairing-chromatography-and-solid-phase-extraction
#14
Blessings Thuboy, Tracy Kellermann, Sandra Castel, Jennifer Norman, Anton Joubert, Anthony J Garcia-Prats, Anneke C Hesseling, Lubbe Wiesner
A bioanalytical method was developed and validated for the quantification of Capreomycin (Cm) analogues, Cm IA and Cm IB, in human plasma. This implemented ion-pairing solid phase extraction (IP-SPE), followed by ion-pairing high performance liquid chromatography (IP-HPLC), with tandem mass spectrometry detection. Chromatographic separation was achieved using a Discovery C18, 5μm, 4.6 mm x 50 mm analytical column. An isocratic mobile phase consisting of water and acetonitrile with 0.1% formic acid and 4 mM Heptafluorobutyric acid (80,20; v/v), was used at a flow-rate of 500 μl per minute...
May 3, 2018: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/29720067/national-tuberculosis-advisory-committee-guideline-management-of-tuberculosis-risk-in-healthcare-workers-in-australia
#15
Justin Waring, Justin Waring
Tuberculosis (TB) is uncommon in Australia and not commonly managed by most healthcare workers (HCWs). However, even in a low incidence setting, occasional exposure of HCWs is inevitable and transmission of TB to HCWs leading to disease does occur. In addition, HCWs may have been recruited to Australia from countries with high TB incidence. These HCWs are more likely to be infected with TB before arrival and subsequently develop active disease while working in health settings in Australia. In 2001, there were 20 TB notifications in HCWs in Australia, of which 10 were born overseas, whereas in 2013, 70 of 77 notified cases (91%) were people born overseas...
September 1, 2017: Communicable Diseases Intelligence Quarterly Report
https://www.readbyqxmd.com/read/29689464/children-s-residential-exposure-to-organophosphate-ester-flame-retardants-and-plasticizers-investigating-exposure-pathways-in-the-tesie-study
#16
Allison L Phillips, Stephanie C Hammel, Kate Hoffman, Amelia M Lorenzo, Albert Chen, Thomas F Webster, Heather M Stapleton
BACKGROUND: Following the phase-out of polybrominated diphenyl ethers (PBDEs), organophosphate esters (OPEs) have been increasingly used in consumer products and building materials for their flame retardant and plasticizing properties. As a result, human exposure to these chemicals is widespread as evidenced by common detection of their metabolites in urine. However, little is known about the major exposure pathways, or factors that influence children's exposure to OPEs. Furthermore, little data is available on exposure to the novel aryl OPEs...
April 20, 2018: Environment International
https://www.readbyqxmd.com/read/29688486/congenital-multidrug-resistant-tuberculosis-in-a-neonate-a-case-report
#17
Tenzin Lhadon, Sophie Jullien
Multidrug-resistant tuberculosis (MDR-TB) is a well-identified raising public health concern worldwide. However, the data available on MDR-TB in children and particularly in the neonate age group are limited. Congenital tuberculosis (TB) is rare, and its diagnosis is challenging because of non-specific manifestations. The choice of anti-tubercular drugs is difficult because of the lack of international consensus as a consequence of the scarcity of evidence-based data on this age group. We hereby present a case from Bhutan of a 23-day-old male neonate with congenital MDR-TB...
April 20, 2018: Journal of Tropical Pediatrics
https://www.readbyqxmd.com/read/29686992/the-history-of-in-vivo-tuberculin-testing-in-bovines-tuberculosis-a-one-health-issue
#18
REVIEW
Margaret Good, Douwe Bakker, Anthony Duignan, Daniel M Collins
Tuberculosis (TB) is more than 3 million years old thriving in multiple species. Ancestral Mycobacterium tuberculosis gave rise to multiple strains including Mycobacterium bovis now distributed worldwide with zoonotic transmission happening in both directions between animals and humans. M. bovis in milk caused problems with a significant number of deaths in children under 5 years of age due largely to extrapulmonary TB. This risk was effectively mitigated with widespread milk pasteurization during the twentieth century, and fewer young children were lost to TB...
2018: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/29673395/shorter-treatment-for-minimal-tuberculosis-tb-in-children-shine-a-study-protocol-for-a-randomised-controlled-trial
#19
Chishala Chabala, Anna Turkova, Margaret J Thomason, Eric Wobudeya, Syed Hissar, Vidya Mave, Marieke van der Zalm, Megan Palmer, Monica Kapasa, Perumal K Bhavani, Sarath Balaji, Priyanka A Raichur, Anne-Marie Demers, Graeme Hoddinott, Ellen Owen-Powell, Aarti Kinikar, Philippa Musoke, Veronica Mulenga, Rob Aarnoutse, Helen McIlleron, Anneke Hesseling, Angela M Crook, Mark Cotton, Diana M Gibb
BACKGROUND: Tuberculosis (TB) in children is frequently paucibacillary and non-severe forms of pulmonary TB are common. Evidence for tuberculosis treatment in children is largely extrapolated from adult studies. Trials in adults with smear-negative tuberculosis suggest that treatment can be effectively shortened from 6 to 4 months. New paediatric, fixed-dose combination anti-tuberculosis treatments have recently been introduced in many countries, making the implementation of World Health Organisation (WHO)-revised dosing recommendations feasible...
April 19, 2018: Trials
https://www.readbyqxmd.com/read/29665952/community-engagement-for-paediatric-mdr-tb-clinical-trials-principles-to-support-ethical-trial-implementation
#20
G Hoddinott, S Staples, R Brown, M Simwinga, C Mubekapi-Musadaidzwa, A C Hesseling, G Hendricks, P De Koker, L McKenna
The paediatric tuberculosis (TB) prevention and treatment landscape is moving into a new and exciting era, with knowledge from clinical trials offering real benefit to children. Community engagement is key to optimising the success of these trials. However, the clinical profile, epidemiology and social perceptions for paediatric multidrug-resistant TB (MDR-TB) complicate the operationalisation of this community engagement. We reflect on a diversity of recent experiences attempting to implement this type of research and the community engagement around it...
May 1, 2018: International Journal of Tuberculosis and Lung Disease
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