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https://www.readbyqxmd.com/read/28231674/-a-preliminary-study-on-the-molecular-characteristics-of-d-cycloserine-resistance-of-mycobacterium-tuberculosis
#1
C Li, G L Li, Q Luo, S J Li, R B Wang, Y L Lou, J X Lyu, K L Wan
Objective: To investigate the relationship between D-cycloserine resistance and the gene mutations of alrA, ddlA and cycA of Mycobacterium (M.) tuberculosis, as well as the association between D-cycloserine resistance and spoligotyping genotyping. Methods: A total of 145 M. tuberculosis strains were selected from the strain bank. D-cycloserine resistant phenotypes of the strains were determined by the proportion method and the minimal inhibitory concentration was determined by resazurin microtiter assay. PCR amplification and DNA direct sequencing methods were used for the analysis of gene mutations...
February 10, 2017: Zhonghua Liu Xing Bing Xue za Zhi, Zhonghua Liuxingbingxue Zazhi
https://www.readbyqxmd.com/read/28230491/subcellular-localization-of-m-tuberculosis-in-vivo-and-effect-of-the-adaptive-immunity
#2
Maaike van Zon, Karin de Punder, Astrid van der Sar, Roland Brosch, Rogelio Hernandez Pando, Anita Grootemaat, Wikky Tigchelaar-Gutter, Nicole van der Wel
No abstract text is available yet for this article.
January 2017: Ultrastructural Pathology
https://www.readbyqxmd.com/read/28230095/genetic-diversity-transmission-dynamics-and-drug-resistance-of-mycobacterium-tuberculosis-in-angola
#3
João Perdigão, Sofia Clemente, Jorge Ramos, Pedro Masakidi, Diana Machado, Carla Silva, Isabel Couto, Miguel Viveiros, Nuno Taveira, Isabel Portugal
Tuberculosis (TB) poses a serious public health problem in Angola. No surveillance data on drug resistance is available and nothing is known regarding the genetic diversity and population structure of circulating Mycobacterium tuberculosis strains. Here, we have genotyped and evaluated drug susceptibility of 89 Mycobacterium tuberculosis clinical isolates from Luanda. Thirty-three different spoligotype profiles corresponding to 24 different Shared International Types (SIT) and 9 orphan profiles were detected...
February 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28229227/population-structure-and-infectious-disease-risk-in-southern-africa
#4
REVIEW
Caitlin Uren, Marlo Möller, Paul D van Helden, Brenna M Henn, Eileen G Hoal
The KhoeSan populations are the earliest known indigenous inhabitants of southern Africa. The relatively recent expansion of Bantu-speaking agropastoralists, as well as European colonial settlement along the south-west coast, dramatically changed patterns of genetic diversity in a region which had been largely isolated for thousands of years. Owing to this unique history, population structure in southern Africa reflects both the underlying KhoeSan genetic diversity as well as differential recent admixture. This population structure has a wide range of biomedical and sociocultural implications; such as changes in disease risk profiles...
February 22, 2017: Molecular Genetics and Genomics: MGG
https://www.readbyqxmd.com/read/28229100/diagnosis-of-tuberculosis-following-world-health-organization-recommended-criteria-in-severely-malnourished-children-presenting-with-pneumonia
#5
Mohammod Jobayer Chisti, Mohammed Abdus Salam, Abu S M S B Shahid, K M Shahunja, Sumon Kumar Das, Abu Syed Golam Faruque, Pradip Kumar Bardhan, Tahmeed Ahmed
Evidences on diagnosis of tuberculosis (TB) following the World Health Organization (WHO) criteria in children with severe acute malnutrition (SAM) are lacking. We sought to evaluate the WHO criteria for the diagnosis of TB in such children. In this prospective study, we enrolled SAM children aged <5 with radiological pneumonia. We collected induced sputum and gastric lavage for smear microscopy, mycobacterial culture, and Xpert MTB/RIF. Using the last 2 methods as the gold standard, we determined sensitivity, specificity, and positive and negative predictive values of WHO criteria (n = 388)...
2017: Global Pediatric Health
https://www.readbyqxmd.com/read/28225907/characterisation-of-iunh-gene-knockout-strain-from-mycobacterium-tuberculosis
#6
Anne Drumond Villela, Valnês da Silva Rodrigues, Antônio Frederico Michel Pinto, Priscila Lamb Wink, Zilpa Adriana Sánchez-Quitian, Guilherme Oliveira Petersen, Maria Martha Campos, Luiz Augusto Basso, Diógenes Santiago Santos
BACKGROUND: Tuberculosis (TB) is an infectious disease caused mainly by the bacillus Mycobacterium tuberculosis. The better understanding of important metabolic pathways from M. tuberculosis can contribute to the development of novel therapeutic and prophylactic strategies to combat TB. Nucleoside hydrolase (MtIAGU-NH), encoded by iunH gene (Rv3393), is an enzyme from purine salvage pathway in M. tuberculosis. MtIAGU-NH accepts inosine, adenosine, guanosine, and uridine as substrates, which may point to a pivotal metabolic role...
March 2017: Memórias do Instituto Oswaldo Cruz
https://www.readbyqxmd.com/read/28225901/tuberculosis-associated-factors-caused-by-mycobacterium-tuberculosis-of-the-rdrio-genotype
#7
Eloise Brasil Moraes, Letícia Slompo, Amanda Juliane Finardi, Heloisa Paro Pedro da Silveira, Luciana Ruiz, Harrison Magdinier Gomes, Virginia Bodelão Richini, Philip Suffys, Carlos Magno Castelo Branco Fortaleza, Ricardo Cavalcanti, Ida Maria Foschiani Dias Baptista
BACKGROUND: Tuberculosis (TB) continues to be a disease that affects many countries around the world, including Brazil. Recently, a subtype of Latin American-Mediterranean family strain was identified and characterised by RDRio. The strain has been associated with different characteristics of the disease. OBJECTIVES: In the present study we investigated the association of epidemiological, clinical, radiological and bacteriological variables with pulmonary tuberculosis caused by RDRioMycobacterium tuberculosis strain in large regions of São Paulo...
March 2017: Memórias do Instituto Oswaldo Cruz
https://www.readbyqxmd.com/read/28225895/tuberculosis-associated-factors-caused-by-mycobacterium-tuberculosis-of-the-rdrio-genotype
#8
Eloise Brasil Moraes, Letícia Slompo, Amanda Juliane Finardi, Heloisa Paro Pedro da Silveira, Luciana Ruiz, Harrison Magdinier Gomes, Virginia Bodelão Richini, Philip Suffys, Carlos Magno Castelo Branco Fortaleza, Ricardo Cavalcanti, Ida Maria Foschiani Dias Baptista
BACKGROUND: Tuberculosis (TB) continues to be a disease that affects many countries around the world, including Brazil. Recently, a subtype of Latin American-Mediterranean family strain was identified and characterised by RDRio. The strain has been associated with different characteristics of the disease. OBJECTIVES: In the present study we investigated the association of epidemiological, clinical, radiological and bacteriological variables with pulmonary tuberculosis caused by RDRioMycobacterium tuberculosis strain in large regions of São Paulo...
February 16, 2017: Memórias do Instituto Oswaldo Cruz
https://www.readbyqxmd.com/read/28225541/perceived-barriers-to-adherence-to-tuberculosis-infection-control-measures-among-health-care-workers-in-the-dominican-republic
#9
Helena J Chapman, Bienvenido A Veras-Estévez, Jamie L Pomeranz, Eddy N Pérez-Then, Belkys Marcelino, Michael Lauzardo
INTRODUCTION Health care workers have an increased risk of infection due to occupational Mycobacterium tuberculosis exposure, including multidrug-resistant strains. Health care workers' risk of developing tuberculosis is greater than that of the general population, whether in low-, intermediate- or high-incidence countries. Adherence to infection control measures (administrative controls, environmental controls, and personal respiratory protection) is essential to reduce risk of disease transmission between suspected tuberculosis patients and health care workers, but for different reasons, both objective and subjective, adherence is low...
January 2017: MEDICC Review
https://www.readbyqxmd.com/read/28225540/antituberculosis-drug-resistance-in-pulmonary-isolates-of-mycobacterium-tuberculosis-cuba-2012-2014
#10
Dihadenys Lemus, Miguel Echemendía, Raúl Díaz, María J Llanes, Lourdes Suárez, Antonio Marrero
INTRODUCTION Systematic surveillance of antituberculosis drug resistance allows identification of multidrug-resistant and extensively drug-resistant isolates of Mycobacterium tuberculosis. Surveillance studies of antituberculosis drug resistance systematically conducted in Cuba for over 15 years have revealed low circulation of multidrug-resistant tuberculosis, under 1% in new cases. OBJECTIVE Characterize antituberculosis drug resistance in isolates of M. tuberculosis recovered from patients with pulmonary tuberculosis in Cuba in 2012-2014...
January 2017: MEDICC Review
https://www.readbyqxmd.com/read/28225348/the-effects-of-smoking-on-treatment-outcome-in-patients-newly-diagnosed-with-pulmonary-tuberculosis
#11
M R Masjedi, M Hosseini, M Aryanpur, E Mortaz, P Tabarsi, H Soori, H Emami, G Heidari, M K Dizagie, M Baikpour
SETTING: Smoking is reported to be associated with tuberculosis (TB), but its effect on sputum smear conversion remains a matter for discussion. OBJECTIVE: To assess the effects of smoking and smoking cessation on treatment outcomes in patients newly diagnosed with TB in Iran. DESIGN: Newly diagnosed smear-positive TB patients were included in the study. All smokers participated in a smoking cessation programme. Sputum smear status was evaluated at the end of month 2, 5 and 6 of treatment, and smoking status was evaluated at the end of month 2...
March 1, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28225345/results-of-xpert-%C3%A2-mtb-rif-implementation-in-kyrgyzstan
#12
G Kurbaniyazova, M Joncevska, S Kalon, G Kalmambetova, T Mohr, A Toktogonova, K Takieva, K M Monirul Islam, F Luelmo
INTRODUCTION: In July 2012, the United States Agency for International Development (USAID) Quality Health Care Project introduced the Xpert® MTB/RIF assay at the facility level of the primary health care system in Kyrgyzstan. This study analysed the results of the implementation of Xpert. MATERIALS AND METHODS: Test results from 2734 patients from July 2012 to December 2014 were analysed. The sensitivity and specificity of Xpert in routine programme conditions were evaluated using culture and phenotypic drug susceptibility testing (DST) as gold standard...
March 1, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28225344/tuberculosis-among-the-homeless-should-we-change-the-strategy
#13
M Dias, R Gaio, P Sousa, M Abranches, M Gomes, O Oliveira, M Correia-Neves, E Ferreira, R Duarte
BACKGROUND: Tuberculosis (TB) is a major concern among high-risk populations such as the homeless. OBJECTIVES: To evaluate TB incidence and treatment outcomes among homeless patients in Portugal and to identify predictors of unsuccessful TB treatment outcomes among the homeless. DESIGN: This was a retrospective cohort study of all TB patients notified in Portugal from 2008 to 2014. Characteristics of homeless TB patients were assessed and predictors of unsuccessful TB treatment were determined using logistic regression...
March 1, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28225343/infection-control-and-tuberculosis-in-health-care-workers-an-assessment-of-28-hospitals-in-south-africa
#14
L M O'Hara, A Yassi, E A Bryce, A Janse van Rensburg, M C Engelbrecht, M Zungu, L E Nophale, J M FitzGerald
SETTING: Twenty-eight public hospitals in the Free State Province, South Africa. OBJECTIVE: To examine the association between tuberculosis (TB) infection control (IC) scores in Free State hospitals and the incidence of TB disease among health care workers (HCWs) in 2012. DESIGN: A cross-sectional survey and mixed-methods analysis of TB IC policies, practices and infrastructure using a comprehensive, 83-item IC audit and observation tool. RESULTS: As the total IC score increased, the probability of TB in an HCW at that hospital decreased...
March 1, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28225342/outcomes-from-the-first-multidrug-resistant-tuberculosis-programme-in-kenya
#15
H Huerga, M Bastard, M Kamene, S Wanjala, A Arnold, N Oucho, I Chikwanha, F Varaine
SETTING: In March 2006, the first multidrug-resistant tuberculosis (MDR-TB) treatment programme was implemented in Kenya. OBJECTIVE: To describe patients' treatment outcomes and adverse events. DESIGN: A retrospective case note review of patients started on MDR-TB treatment at two Médecins Sans Frontières-supported sites and the national referral hospital of Kenya was undertaken. Sites operated an ambulatory model of care. Patients were treated for a minimum of 24 months with at least 4-5 drugs for the intensive phase of treatment, including an injectable agent...
March 1, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28225341/patterns-of-drug-resistance-among-patients-with-tuberculous-pleural-effusion-in-greece
#16
V Anastasakos, V Skouras, C Moschos, S Tsikrika, S Karabela, I Marinou, E Vogiatzakis, K Konstantinou, A Papavasiliou, I Kalomenidis
SETTING: Data on the relationship between pleural tuberculosis (TB) and anti-tuberculosis drug resistance are scarce. OBJECTIVE: To determine the patterns of drug resistance among pleural Mycobacterium tuberculosis isolates in Greece and the incidence of tuberculous pleural effusion (TPE) among patients with multidrug-resistant (MDR) or extensively drug-resistant (XDR) pulmonary TB. DESIGN: Drug susceptibility testing (DST) results recorded in the database of the National Reference Centre for Tuberculosis in Athens, Greece, over a 9-year period (2003-2011) were reviewed...
March 1, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28225340/pattern-of-first-and-second-line-drug-resistance-among-pulmonary-tuberculosis-retreatment-cases-in-pakistan
#17
A Javaid, R Hasan, A Zafar, M A Chaudry, S Qayyum, E Qadeer, Z Shaheen, N Agha, N Rizvi, M Z Afridi, M K Chima, A R Khan, A Ghafoor, S Khan, S R Awan, S Akhtar, K Choudry, Z H Iqbal, M Ansarie, N Ahmad
BACKGROUND: Drug resistance in general, and multidrug-resistant tuberculosis (MDR-TB) in particular, threatens global tuberculosis (TB) control efforts. Population-based estimates of drug resistance are needed to develop strategies for controlling drug-resistant TB in Pakistan. OBJECTIVE: To obtain population-based data on Mycobacterium tuberculosis drug resistance in Pakistan. METHODS: To obtain drug resistance data, we conducted a population-based study of TB cases in all provinces of Pakistan...
March 1, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28225337/multiple-cytokines-for-the-detection-of-mycobacterium-tuberculosis-infection-in-children-with-tuberculosis
#18
N Nausch, C Lundtoft, G Schulz, H Henckel, E Mayatepek, B Fleischer, F M Marx, M Jacobsen
SETTING: Interferon-gamma (IFN-γ) release assays (IGRAs) play an important role in the diagnosis of Mycobacterium tuberculosis infection. However, in children with tuberculosis (TB), some studies have shown increased frequencies of false-negative or indeterminate IGRA results. OBJECTIVE: To analyse the spectrum of different cytokines to improve the diagnostic accuracy of IGRAs in latent tuberculous infection (LTBI) and active TB. DESIGN: We performed multiplex cytokine expression analysis of QuantiFERON® Gold In-Tube supernatants in children with active TB (n = 21) and disease-free contacts with (n = 15) and without LTBI (n = 12), to determine the sensitivity and specificity of the modified tests...
March 1, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28225335/integrating-tuberculosis-screening-in-kenyan-prevention-of-mother-to-child-transmission-programs
#19
L M Cranmer, A Langat, K Ronen, C J McGrath, S LaCourse, J Pintye, B Odeny, B Singa, A Katana, L Nganga, J Kinuthia, G John-Stewart
BACKGROUND: Tuberculosis (TB) screening in Prevention of Mother-To-Child Transmission (PMTCT) programs is important to improve TB detection, prevention and treatment. METHODS: As part of a national PMTCT program evaluation, mother-infant pairs attending 6-week and 9-month immunization visits were enrolled at 141 maternal and child health clinics throughout Kenya. Clinics were selected using population-proportion-to-size sampling with oversampling in a high human immunodeficiency virus (HIV) prevalence region...
March 1, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28223969/mycobacterium-tuberculosis-prolyl-oligopeptidase-induces-in-vitro-secretion-of-proinflammatory-cytokines-by-peritoneal-macrophages
#20
Brina Portugal, Flávia N Motta, Andre F Correa, Diego O Nolasco, Hugo de Almeida, Kelly G Magalhães, Ana L V Atta, Francisco D Vieira, Izabela M D Bastos, Jaime M Santana
Tuberculosis (TB) is a disease that leads to death over 1 million people per year worldwide and the biological mediators of this pathology are poorly established, preventing the implementation of effective therapies to improve outcomes in TB. Host-bacterium interaction is a key step to TB establishment and the proteases produced by these microorganisms seem to facilitate bacteria invasion, migration and host immune response evasion. We presented, for the first time, the identification, biochemical characterization, molecular dynamics (MDs) and immunomodulatory properties of a prolyl oligopeptidase (POP) from Mycobacterium tuberculosis (POPMt)...
2017: Frontiers in Microbiology
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