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https://www.readbyqxmd.com/read/28106529/a-joint-cross-border-investigation-of-a-cluster-of-multidrug-resistant-tuberculosis-in-austria-romania-and-germany-in-2014-using-classic-genotyping-and-whole-genome-sequencing-methods-lessons-learnt
#1
Lena Fiebig, Thomas A Kohl, Odette Popovici, Margarita Mühlenfeld, Alexander Indra, Daniela Homorodean, Domnica Chiotan, Elvira Richter, Sabine Rüsch-Gerdes, Beatrix Schmidgruber, Patrick Beckert, Barbara Hauer, Stefan Niemann, Franz Allerberger, Walter Haas
Molecular surveillance of multidrug-resistant tuberculosis (MDR-TB) using 24-loci MIRU-VNTR in the European Union suggests the occurrence of international transmission. In early 2014, Austria detected a molecular MDR-TB cluster of five isolates. Links to Romania and Germany prompted the three countries to investigate possible cross-border MDR-TB transmission jointly. We searched genotyping databases, genotyped additional isolates from Romania, used whole genome sequencing (WGS) to infer putative transmission links, and investigated pairwise epidemiological links and patient mobility...
January 12, 2017: Euro Surveillance: Bulletin Européen sur les Maladies Transmissibles, European Communicable Disease Bulletin
https://www.readbyqxmd.com/read/28100068/prevalence-patterns-and-correlates-of-hiv-disclosure-among-tb-hiv-patients-initiating-antiretroviral-therapy-in-lesotho
#2
Eleanor Hayes-Larson, Yael Hirsch-Moverman, Suzue Saito, Koen Frederix, Blanche Pitt, Bridget Llang Maama, Andrea A Howard
Disclosure of HIV-positive status has important implications for patient outcomes and preventing HIV transmission, but has been understudied in TB-HIV patients. We assessed disclosure patterns and correlates of non-disclosure among adult TB-HIV patients initiating ART enrolled in the START Study, a mixed-methods cluster-randomized trial conducted in Lesotho, which evaluated a combination intervention package (CIP) versus standard of care. Interviewer-administered questionnaire data were analyzed to describe patterns of disclosure...
January 18, 2017: AIDS Care
https://www.readbyqxmd.com/read/28096657/vitamin-d-deficiency-and-the-risk-of-tuberculosis-a-meta-analysis
#3
Shao-Jun Huang, Xian-Hua Wang, Zhi-Dong Liu, Wen-Li Cao, Yi Han, Ai-Guo Ma, Shao-Fa Xu
BACKGROUND AND AIM: To conduct meta-analyses of all published studies on various aspects of association between vitamin D and tuberculosis (TB). METHODS: PubMed and Web of Knowledge were searched for all properly controlled studies on vitamin D and TB. Pooled odds ratio, mean difference or standardized mean difference, and its corresponding 95% confidence interval were calculated with the Cochrane Review Manager 5.3. RESULTS: A significantly lower vitamin D level was found in TB patients vs controls; vitamin D deficiency (VDD) was associated with an increased risk of TB, although such an association was lacking in the African population and in the human immunodeficiency virus-infected African population...
2017: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/28092681/genomic-analysis-of-globally-diverse-mycobacterium-tuberculosis-strains-provides-insights-into-the-emergence-and-spread-of-multidrug-resistance
#4
Abigail L Manson, Keira A Cohen, Thomas Abeel, Christopher A Desjardins, Derek T Armstrong, Clifton E Barry, Jeannette Brand, Sinéad B Chapman, Sang-Nae Cho, Andrei Gabrielian, James Gomez, Andreea M Jodals, Moses Joloba, Pontus Jureen, Jong Seok Lee, Lesibana Malinga, Mamoudou Maiga, Dale Nordenberg, Ecaterina Noroc, Elena Romancenco, Alex Salazar, Willy Ssengooba, A A Velayati, Kathryn Winglee, Aksana Zalutskaya, Laura E Via, Gail H Cassell, Susan E Dorman, Jerrold Ellner, Parissa Farnia, James E Galagan, Alex Rosenthal, Valeriu Crudu, Daniela Homorodean, Po-Ren Hsueh, Sujatha Narayanan, Alexander S Pym, Alena Skrahina, Soumya Swaminathan, Martie Van der Walt, David Alland, William R Bishai, Ted Cohen, Sven Hoffner, Bruce W Birren, Ashlee M Earl
Multidrug-resistant tuberculosis (MDR-TB), caused by drug-resistant strains of Mycobacterium tuberculosis, is an increasingly serious problem worldwide. Here we examined a data set of whole-genome sequences from 5,310 M. tuberculosis isolates from five continents. Despite the great diversity of these isolates with respect to geographical point of isolation, genetic background and drug resistance, the patterns for the emergence of drug resistance were conserved globally. We have identified harbinger mutations that often precede multidrug resistance...
January 16, 2017: Nature Genetics
https://www.readbyqxmd.com/read/28087948/regulation-of-immunity-to-tuberculosis
#5
Susanna Brighenti, Diane J Ordway
Immunity against Mycobacterium tuberculosis requires a balance between adaptive immune responses to constrain bacterial replication and the prevention of potentially damaging immune activation. Regulatory T (Treg) cells express the transcription factor Foxp3+ and constitute an essential counterbalance of inflammatory Th1 responses and are required to maintain immune homeostasis. The first reports describing the presence of Foxp3-expressing CD4+ Treg cells in tuberculosis (TB) emerged in 2006. Different Treg cell subsets, most likely specialized for different tissues and microenvironments, have been shown to expand in both human TB and animal models of TB...
December 2016: Microbiology Spectrum
https://www.readbyqxmd.com/read/28087928/factors-associated-with-non-completion-of-follow-up-33-month-latent-tuberculous-infection-treatment-trial
#6
R N Moro, T R Sterling, J Saukkonen, A Vernon, C R Horsburgh, R E Chaisson, C D Hamilton, M E Villarino, S Goldberg
<h2>SETTING:</h2><p>A post-hoc exploratory analysis of a randomized, open-label clinical trial thatenrolled 8053 participants from the United States, Canada, Brazil, and Spain.</p><h2>OBJECTIVE:</h2><p>To assess factors associated with non-completion of study follow-up (NCF) in a 33-month latent tuberculous infection treatment trial, PREVENT TB.</p><h2>DESIGN:</h2><p>Participants were randomized to receive 3 months of weekly directly observed therapy vs...
January 13, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28087924/clinical-testing-of-tuberculosis-vaccine-candidates
#7
Mark Hatherill, Dereck Tait, Helen McShane
It is almost 100 years since the development of bacille Calmette-Guérin (BCG), the only licensed vaccine against tuberculosis (TB). While BCG does confer consistent protection against disseminated disease, there is an urgent need for a more effective vaccine against pulmonary disease. There are several indications for such an improved vaccine, including prevention of infection, prevention of disease, and a therapeutic vaccine to prevent recurrent disease. The two main approaches to TB vaccine development are developing an improved whole mycobacterial priming agent to replace BCG and/or developing a subunit booster vaccine to be administered after a BCG or BCG replacement priming vaccination...
October 2016: Microbiology Spectrum
https://www.readbyqxmd.com/read/28086955/evaluation-of-the-xpert%C3%A2-mtb-rif-assay-and-microscopy-for-the-diagnosis-of-mycobacterium-tuberculosis-in-namibia
#8
Rooyen T Mavenyengwa, Emma Shaduka, Innocent Maposa
BACKGROUND: Tuberculosis (TB) kills approximately two million people and infects around nine million worldwide annually. Its proper management, especially in resource-limited settings, has been hindered by the lack of rapid and easy-to-use diagnostic tests. Sputum smear microscopy remains the cheapest, readily available diagnostic method but it only identifies less than half of the patients with a HIV/TB co-infection because the bacilli would have disseminated from the lungs to other areas of the body...
January 11, 2017: Infectious Diseases of Poverty
https://www.readbyqxmd.com/read/28069654/reduced-chance-of-hearing-loss-associated-with-therapeutic-drug-monitoring-of-aminoglycosides-in-the-treatment-of-multidrug-resistant-tuberculosis
#9
R van Altena, J A Dijkstra, M E van der Meer, J F Borjas Howard, J G W Kosterink, D van Soolingen, T S van der Werf, J W C Alffenaar
Hearing loss and nephrotoxicity are associated with prolonged treatment duration and higher dosage of amikacin and kanamycin. In our Tuberculosis Center, we have employed therapeutic drug monitoring (TDM) targeting pre-set pharmacokinetic/pharmacodynamic (PK/PD) surrogate endpoints in an attempt to maintain efficacy while preventing (oto-)toxicity. To evaluate this strategy, we retrospectively evaluated medical charts of TB patients treated with amikacin or kanamycin in the period 2000 - 2012.Patients with culture-confirmed multi- or extensively drug resistant tuberculosis (MDR/XDR-TB) receiving amikacin or kanamycin as part of their TB treatment for at least 3 days were eligible for inclusion in this retrospective study...
January 9, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28052948/tb-or-not-to-be-kikuchi-fujimoto-disease-a-rare-but-important-differential-for-tb
#10
C McKenna, T Whitfield, N Patel, A Bonington
A 29-year-old British Pakistani woman presented with a 2-month history of drenching fevers, night sweats, lethargy and tender cervical and axillary lymphadenopathy. Initial investigations, bloods and imaging were unremarkable. Fever persisted during her admission, and treatment for tuberculosis (TB) lymphadenitis was started postbiopsy until histology confirmed a diagnosis of Kikuchi-Fujimoto's disease (KFD). KFD has a non-specific presentation of fever, night sweats and lymphadenopathy and commonly raises a clinical suspicion of a number of other serious conditions such as TB, lymphoma, HIV, systemic lupus erythematous, toxoplasmosis and infectious mononucleosis...
January 4, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28051229/contribution-of-fixed-dose-combinations-in-the-treatment-of-tuberculosis
#11
Sonia Toujani, Boutheina Ben Safta, Nozha Ben Salah, Meriem Mjid, Yacine Ouahchi, Béchir Louzir, Jalloul Daghfous, Jouda Cherif, Nadia Mehiri, Majed Beji
Background - The introduction of fixed-dose combinations (FDCs) of TB treatment in Tunisia is recent (July 2009). WHO and the National Tuberculosis Programme recommend the use of fixed-dose combination (FDC) tablets for the treatment of tuberculosis (TB). The effectiveness of ADF has been demonstrated, however the risk of relapse and tolerance were controversial. Objective - Through a retrospective study, we evaluate, the contribution of FDCs compared with dissociated treatment (TD) (efficacy, tolerance and the occurrence of relapses)...
July 2016: La Tunisie Médicale
https://www.readbyqxmd.com/read/28049455/effectiveness-of-isoniazid-preventative-therapy-in-reducing-incidence-of-active-tuberculosis-among-people-living-with-hiv-aids-in-public-health-facilities-of-addis-ababa-ethiopia-a-historical-cohort-study
#12
Mahlet Semu, Teferi Gedif Fenta, Girmay Medhin, Dawit Assefa
BACKGROUND: Human Immunodeficiency Virus (HIV) pandemic has exacerbated tuberculosis disease especially in Sub-Saharan African countries. The World Health Organization (WHO) and Joint United Nations Program on HIV/AIDS (UNAIDS) have recommended Isoniazid Preventive Therapy (IPT) for HIV infected patients to reduce the burden of tuberculosis (TB). Ethiopia has been implementing IPT since 2007. However, effectiveness of IPT in averting occurrence of active tuberculosis among HIV infected patients has not been assessed...
January 3, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28043633/development-of-escherichia-coli-and-mycobacterium-smegmatis-recombinants-expressing-major-mycobacterium-tuberculosis-specific-antigenic-proteins
#13
Hanady A Amoudy, Hussain A Safar, Abu S Mustafa
OBJECTIVE/BACKGROUND: Mycobacterium tuberculosis is an obligate pathogenic bacterial species in the family Mycobacteriaceae and the causative agent of most tuberculosis (TB) cases. Until today, the only approved TB vaccine is Bacille Calmette Guerin (BCG), which has been used since 1921. While BCG provides fairly effective protection for infants and young children, its efficacy in adults is variable around the world. This could be due to several parameters including strains of the vaccine and exposure of individuals to different environmental bacterial infections...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28043616/whole-genome-sequencing-as-the-ultimate-tool-to-diagnose-tuberculosis
#14
Dick van Soolingen, Rana Jajou, Arnout Mulder, Han de Neeling
In the past two decades, DNA techniques have been increasingly used in the laboratory diagnosis of tuberculosis (TB). The (sub) species of the Mycobacterium tuberculosis complex are usually identified using reverse line blot techniques. The resistance is predicted by the detection of mutations in genes associated with resistance. Nevertheless, all cases are still subjected to cumbersome phenotypic resistance testing. The production of a strain-characteristic DNA fingerprint, to investigate the epidemiology of TB, is done by the 24-locus variable number tandem repeat (VNTR) typing...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28043609/personalized-information-system-for-the-control-of-tuberculosis-in-resource-limited-settings-a-simplistic-proposal-approach
#15
Benjamin D Thumamo Pokam, Prisca W Guemdjom
Passive case finding remains the mainstay of tuberculosis (TB) control in several resource-limited countries. Although TB prevalence and mortality rates have declined in recent years, an estimated 3 million cases a year still go undetected and/or unreported, and delays in the diagnosis and treatment of TB continue to be widespread. It has been shown that identifying and treating individuals with latent TB infection (LTBI) prevents progression to active TB disease and is one of the key components of TB control strategies...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28043608/new-options-in-tuberculosis-care-visions-for-the-future-are-crucial-for-controlling-the-disease
#16
Malin Ridell
The current strategies for controlling tuberculosis (TB) are not sufficient. Improved prophylactic and diagnostic tools are imperative, being crucial for decreasing TB incidence and mortality and for preventing outbreaks. Furthermore, new and better drugs are badly needed, particularly considering the increase in cases with multidrug-resistant strains. The current TB vaccine-the Bacillus Calmette-Guérin vaccine-has a preventive impact on disseminated TB in children, but little effect on the most common form of TB, that is, lung TB in adults and young adults...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28043603/individualized-treatment-of-multidrug-resistant-tuberculosis-using-therapeutic-drug-monitoring
#17
Mathieu S Bolhuis, Onno W Akkerman, Marieke G G Sturkenboom, Wiel C M de Lange, Tjip S van der Werf, Jan-Willem C Alffenaar
OBJECTIVE/BACKGROUND: Globally, approximately 50% of patients with multidrug-resistant tuberculosis (MDR-TB) experience treatment failure. MDR-TB treatment is hindered by adverse events, toxicity of the second-line anti-TB drugs, logistics and costs, especially in low-income countries, and problems with medication adherence. Pharmacokinetic variability is also attributed as one of the reasons contributing to treatment failure. In our reference Tuberculosis Center Beatrixoord (University Medical Center Groningen, Groningen, The Netherlands), we strive to individualize treatment of all MDR-TB patients based on drug-susceptibility testing using minimal inhibitory concentrations and pharmacokinetic parameters...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28043595/reaching-consensus-on-drug-resistance-conferring-mutations
#18
Daniela M Cirillo, Paolo Miotto, Elisa Tagliani
OBJECTIVE/BACKGROUND: Molecular-based, rapid drug-susceptibility tests are needed to guide the appropriate use of new drugs and new therapeutic regimens at the programmatic level, and to prevent a further increase in the incidence of drug-resistant tuberculosis (TB). Experts have recognized the need for a global, curated, and standardized analysis and data-sharing platform that provides a one-stop data source for clinically relevant genotypic and phenotypic information on Mycobacterium tuberculosis...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28043594/incidence-of-tuberculosis-among-children-living-in-contact-with-smear-positive-tuberculosis-advantages-and-limits-of-the-quantiferon-tb-gold-in-tube-test
#19
Djohar Hannoun, Fadila Boulahbal
OBJECTIVE/BACKGROUND: Children living in contact with smear-positive pulmonary tuberculosis (TB) patients are highly exposed to TB infection. Our objective was to estimate the incidence of TB in children living in contact with a Smear Positive (M+) pulmonary tuberculosis (PTM+) index case during 2years following exposure. METHODS: This was a descriptive, cohort, prospective, multicenter study of children aged from 6months to 15years in contact with a PTM+ case. The recruitment of children has been based on the diagnosed PTM+ index case and taken in charge by the Services of Control of Tuberculosis and Respiratory Diseases located in Algiers during 2014...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28043540/nationwide-hiv-mdr-tb-survey-in-japan-and-collaborative-study-in-the-philippines
#20
Toshio Hattori, Nobuyuki Kobayashi, Hideaki Nagai, Haorile Chagan-Yasutan, Elizabeth Telan, Marietta B Solante
BACKGROUND: Although the prevalence of pulmonary tuberculosis (TB) and HIV infection in Japan is low, careful monitoring of these two diseases is necessary. We conducted a nationwide survey on multidrug resistant (MDR)-TB (2011-2013) and HIV-TB (2007-2014) to understand the mode of prevention and the effect of therapy. A study on MDR-TB and HIV in San Lazaro Hospital (SLH) in the Philippines was also conducted. These studies introduced an international collaborative study against the global epidemics of HIV-TB/MDR-TB...
December 2016: International Journal of Mycobacteriology
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