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https://www.readbyqxmd.com/read/28633701/management-of-child-mdr-tb-contacts-across-countries-in-the-who-european-region-a-survey-of-current-practice
#1
A Turkova, M Tebruegge, F Brinkmann, M Tsolia, F Mouchet, B Kampmann, J A Seddon
The World Health Organization European Region has one of the highest rates of multidrug-resistant tuberculosis (MDR-TB) in the world, resulting in many vulnerable children being exposed each year. Evidence for preventive therapy following MDR-TB exposure is limited and current guidance is conflicting. An internet-based survey was performed to determine clinical practice in this region. Seventy-two clinicians from 25 countries participated. Practices related to screening and decision-making were highly variable...
July 1, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28633700/trends-in-drug-resistant-tuberculosis-after-the-implementation-of-the-dots-strategy-in-shenzhen-china-2000-2013
#2
L Zhu, Y-Z Yang, H-Y Guan, S-M Cheng, Y-Y Jin, W-G Tan, Q-F Wu, X-L Liu, M-G Zhao, Z-H Lu, Z-W Jia
SETTING: The DOTS strategy has been regarded as the most cost-effective way to stop the spread of tuberculosis (TB) since its launch by the World Health Organization. OBJECTIVE: To estimate the effects of DOTS by tracking long-term trends in multidrug-resistant TB (MDR-TB). DESIGN: A retrospective cohort study was conducted from 2000 to 2013 to analyse trends in resistance to anti-tuberculosis drugs and the effect of DOTS-based treatment in Shenzhen, China, using the χ2 test...
July 1, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28633699/migration-histories-of-multidrug-resistant-tuberculosis-patients-from-the-thailand-myanmar-border-2012-2014
#3
S S Thi, D M Parker, L L Swe, S Pukrittayakamee, C L Ling, K Amornpaisarnloet, M Vincenti-Delmas, F H Nosten
SETTING: Multidrug-resistant tuberculosis (MDR-TB) is a growing public health threat in South-East Asia. TB is typically a disease of poverty and can be spread by infectious humans who migrate from one region to another. DESIGN: We interviewed 20 MDR-TB patients on the Thailand-Myanmar border with regard to their migration histories. Migration origins and destinations were mapped. RESULTS: All but one participant had a history of migration, and maps of migration ranges revealed wide geographic dispersal...
July 1, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28633501/epidemiology-of-pediatric-multidrug-resistant-tuberculosis-in-the-united-states-1993-2014
#4
Sarah E Smith, Robert Pratt, Lisa Trieu, Pennan M Barry, Dzung T Thai, Shama Desai Ahuja, Sarita Shah
Background: Multidrug-resistant tuberculosis (MDR TB) is an important global public health threat, but accurate estimates of MDR TB burden among children are lacking. Methods: We analyzed demographic, clinical and laboratory data for newly-diagnosed pediatric (<15 years) TB cases reported to the US National TB Surveillance System (NTSS) during 1993-2014. MDR TB was defined as culture-confirmed TB disease with resistance to at least isoniazid and rifampicin. To ascertain potential under-estimation of pediatric MDR TB, we surveyed high burden states for clinically-diagnosed cases treated for MDR TB...
June 19, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28631643/multidrug-resistant-tuberculosis-detection-and-characterization-of-mutations-in-mycobacterium-tuberculosis-by-genotype-mtbdrplus
#5
Rajneesh Tripathi, Shampa Anupurba
Detection of drug resistance in Mycobacterium tuberculosis by conventional phenotypic drug susceptibility testing methods requires several weeks. Therefore, molecular diagnostic tests for rapid detection of multidrug resistance tuberculosis (MDR-TB) are urgently needed. Early diagnosis helps in initiating optimal treatment which would not only enable cure of an individual patient but also will curb the transmission of drug resistance in the community. Line probe assay (LPA) has shown great promises in the diagnosis of MDR-TB...
April 2017: Indian Journal of Pathology & Microbiology
https://www.readbyqxmd.com/read/28630193/pyrazinamide-susceptibility-and-pnca-mutation-profile-of-mycobacterium-tuberculosis-among-multi-drug-resistant-tuberculosis-patients-in-bangladesh
#6
Arfatur Rahman, Sara Sabrina Ferdous, Shahriar Ahmed, S M Mazidur Rahman, Mohammad Khaja Mafij Uddin, Suporn Pholwat, Jean Gratz, Eric Houpt, Sayera Banu
Pyrazinamide (PZA) is a front line anti-tuberculosis (anti-TB) drug used in both first and second line treatment regimen. However, due to complex laboratory requirements, the PZA susceptibility test is rarely performed leading to the scarcity of data. Bangladesh is both a high TB and multi-drug resistant (MDR-TB) burden country but to our knowledge the published data on PZA susceptibility is limited, especially among MDR-TB patients. We aimed to analyze the PZA susceptibility pattern of Mycobacterium tuberculosis (MTB) isolates from MDR-TB patients and to correlate pncA mutation with PZA resistance in Bangladesh...
June 19, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28628669/the-global-fund-in-china-multidrug-resistant-tuberculosis-nationwide-programmatic-scale-up-and-challenges-to-transition-to-full-country-ownership
#7
Lixia Wang, Renzhong Li, Caihong Xu, Hui Zhang, Yunzhou Ruan, Mingting Chen, Dongmei Wang, Emilio Dirlikov, Xin Du, Jin Zhao, Yanlin Zhao, ShengFen Wang, Yuhong Liu, Liang Li, Dennis Falzon, Yanni Sun, Yu Wang, Bernhard Schwartländer, Fabio Scano
China has the world's second largest burden of multidrug-resistant tuberculosis (MDR-TB; resistance to at least isoniazid and rifampicin), with an estimated 57,000 cases (range, 48,000-67,000) among notified pulmonary TB patients in 2015. During October 1, 2006-June 30, 2014, China expanded MDR-TB care through a partnership with the Global Fund to Fight AIDS, Tuberculosis, and Malaria (Global Fund). We analyzed data on site expansion, patient enrolment, treatment outcomes, cost per patient, and overall programme expenditure...
2017: PloS One
https://www.readbyqxmd.com/read/28627432/high-diversity-of-multidrug-resistant-mycobacterium-tuberculosis-central-asian-strain-isolates-in-nepal
#8
Yogendra Shah, Bhagwan Maharjan, Jeewan Thapa, Ajay Poudel, Hassan Mahmoud Diab, Basu Dev Pandey, Eddie Solo, Norikazu Isoda, Yasuhiko Suzuki, Chie Nakajima
OBJECTIVES: Tuberculosis caused by Mycobacterium tuberculosis (MTB) poses a major public health problem in Nepal. Although it has been reported as one of the dominant genotypes of MTB in Nepal, little information on the Central Asian Strain (CAS) family is available, especially isolates related to multidrug resistance (MDR) cases. Here, we aimed to elucidate the genetic and epidemiological characteristics of MDR CAS isolates in Nepal. METHODS: A total of 145 MDR CAS isolates collected in Nepal from 2008 to 2013 were characterized by spoligotyping, mycobacterial interspersed repetitive unit-variable number tandem repeat (MIRU-VNTR) analysis and drug resistance-associating gene sequencing...
June 13, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/28625141/bedaquiline-a-new-hope-for-shorter-and-better-anti-tuberculosis-regimens
#9
Niccolò Riccardi, Filippo Del Puente, Federica Magnè, Lucia Taramasso, Antonio Di Biagio
In 2014, an estimated 1.8 million people died from Mycobacterium tuberculosis (MTB); moreover, 680,000 people developed multidrug-resistant TB (MDR-TB). Currently available anti-MDR and XDR regimens are long-lasting and expensive, need high adherence and are undermined by a high frequency of adverse drug events, thus leading to a low success rate; moreover, in the last 50 years only two new molecules, bedaquiline (BDQ) and delamanid, have been approved and released for treatment of MDR-TB. BDQ is a diarylquinoline anti-mycobacterial drug, active regardless the state of MTB; in fact, its efficacy is conserved against replicating and non-replicating bacilli, despite extracellular or intracellular location...
June 19, 2017: Recent Patents on Anti-infective Drug Discovery
https://www.readbyqxmd.com/read/28623123/screening-mutations-in-drug-resistant-mycobacterium-tuberculosis-strains-in-yunnan-china
#10
Daoqun Li, Yuzhu Song, Cheng-Lin Zhang, Xiaofei Li, Xueshan Xia, A-Mei Zhang
Drug-resistant tuberculosis (DR-TB), especially multidrug-resistant tuberculosis (MDR-TB), is a serious medical and societal problem in China. The purpose of this study was to evaluate the mutation characteristics of drug-resistant Mycobacterium tuberculosis (M. tuberculosis) isolates in Yunnan, China. Drug susceptibility testing (DST) was performed in 523 clinical M. tuberculosis isolates. Six drug resistance genes (katG, inhA, rpoB, rpsL, embB, and pncA) were selected to screen for mutations. In total, 54 clinical M...
June 13, 2017: Journal of Infection and Public Health
https://www.readbyqxmd.com/read/28620844/comparison-of-the-characteristics-of-mycobacterium-tuberculosis-isolates-from-sputum-and-lung-lesions-in-chronic-tuberculosis-patients
#11
M-S Hong, Y Kim, E-J Cho, J-S Lee, H-K Kwak, J-H Kim, C-T Kim, J-S Cho, S-K Park, D Jeon, Y-I Choi, H Lee, S-Y Eum
Mycobacterium tuberculosis (Mtb) in sputum originates from lung cavities in tuberculosis (TB) patients. But drug susceptibility testing (DST) of sputum Mtb can not be conducted the same as in the lung because mutagenesis of bacilli may be happening in the lung during treatment and result in the possibility of the presence of heterogeneous drug-resistant subpopulations in the different lung lesions. This could be one of the reasons for low cure rates for multi-drug resistant (MDR)-TB. We studied the resected lungs of nine surgery patients with chronic TB...
June 15, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28611374/efficacy-and-safety-of-mycobacterium-indicus-pranii-as-an-adjunct-therapy-in-category-ii-pulmonary-tuberculosis-in-a-randomized-trial
#12
Surendra K Sharma, Kiran Katoch, Rohit Sarin, Raman Balambal, Nirmal Kumar Jain, Naresh Patel, Kolluri J R Murthy, Neeta Singla, P K Saha, Ashwani Khanna, Urvashi Singh, Sanjiv Kumar, A Sengupta, J N Banavaliker, D S Chauhan, Shailendra Sachan, Mohammad Wasim, Sanjay Tripathi, Nilesh Dutt, Nitin Jain, Nalin Joshi, Sita Ram Raju Penmesta, Sumanlatha Gaddam, Sanjay Gupta, Bakulesh Khamar, Bindu Dey, Dipendra K Mitra, Sunil K Arora, Sangeeta Bhaskar, Rajni Rani
Prolonged treatment of tuberculosis (TB) often leads to poor compliance, default and relapse, converting primary TB patients into category II TB (Cat IITB) cases, many of whom may convert to multi-drug resistant TB (MDR-TB). We have evaluated the immunotherapeutic potential of Mycobacterium indicus pranii (MIP) as an adjunct to Anti-Tubercular Treatment (ATT) in Cat II pulmonary TB (PTB) patients in a prospective, randomized, double blind, placebo controlled, multicentric clinical trial. 890 sputum smear positive Cat II PTB patients were randomized to receive either six intra-dermal injections (2 + 4) of heat-killed MIP at a dose of 5 × 10(8) bacilli or placebo once in 2 weeks for 2 months...
June 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28610793/a-novel-automatic-molecular-test-for-detection-of-multidrug-resistance-tuberculosis-in-sputum-specimen-a-case-control-study
#13
Qiang Li, Xi C Ou, Yu Pang, Hui Xia, Hai R Huang, Bing Zhao, Sheng F Wang, Yan L Zhao
MiniLab tuberculosis (ML TB) assay is a new automatic diagnostic tool for diagnosis of multidrug resistance tuberculosis (MDR-TB). This study was conducted with aims to know the performance of this assay. Sputum sample from 224 TB suspects was collected from tuberculosis suspects seeking medical care at Beijing Chest hospital. The sputum samples were directly used for smear and ML TB test. The left sputum sample was used to conduct Xpert MTB/RIF, Bactec MGIT culture and drug susceptibility test (DST). All discrepancies between the results from DST, molecular and phenotypic methods were confirmed by DNA Sequencing...
July 2017: Tuberculosis
https://www.readbyqxmd.com/read/28610789/comparative-study-of-genotypes-of-mycobacterium-tuberculosis-from-a-northern-indian-setting-with-strains-reported-from-other-parts-of-india-and-neighboring-countries
#14
Pragya Sharma, Kiran Katoch, Shilpi Chandra, Devendra Singh Chauhan, Vishnu Dutt Sharma, David Couvin, Nalin Rastogi, Vishwa Mohan Katoch
This study was carried out to characterize Mycobacterium tuberculosis population in Ghatampur, Kanpur, North India, by spoligotyping and Mycobacterial Interspersed Repetitive Units-Variable Number of Tandem Repeats (MIRU-VNTRs) typing. A total of 335 isolates were genotyped by spoligotyping and Central Asian (CAS) sub-lineage was the most prevalent, comprising 59.1% of all isolates. Other lineages were: East-African Indian (EAI) (19.10%), T (5.07%), Beijing (3.28%), Manu (2.98%), X (2.68%), S (0.89%), H3 (0...
July 2017: Tuberculosis
https://www.readbyqxmd.com/read/28610784/molecular-investigation-of-active-binding-site-of-isoniazid-inh-and-insight-into-resistance-mechanism-of-s315t-mtkatg-in-mycobacterium-tuberculosis
#15
Gaurava Srivastava, Shubhandra Tripathi, Akhil Kumar, Ashok Sharma
Multi drug resistant tuberculosis is a major threat for mankind. Resistance against Isoniazid (INH), targeting MtKatG protein, is one of the most commonly occurring resistances in MDR TB strains. S315T-MtKatG mutation is widely reported for INH resistance. Despite having knowledge about the mechanism of INH, exact binding site of INH to MtKatG is still uncertain and proposed to have three presumable binding sites (site-1, site-2, and site-3). In the current study docking, molecular dynamics simulation, binding free energy estimation, principal component analysis and free energy landscape analysis were performed to get molecular level details of INH binding site on MtKatG, and to probe the effect of S315T mutation on INH binding...
July 2017: Tuberculosis
https://www.readbyqxmd.com/read/28607022/pharmacokinetics-of-pyrazinamide-optimising-dosing-regimens-for-drug-sensitive-and-resistant-tuberculosis
#16
Maxwell T Chirehwa, Helen McIlleron, Roxana Rustomjee, Thuli Mthiyane, Philip Onyebujoh, Peter Smith, Paolo Denti
Pyrazinamide is used in the treatment of tuberculosis(TB) because its sterilising effect against tubercle bacilli allows treatment shortening. It is part of standard treatment for drug-susceptible and drug-resistant TB, and it is being considered as a companion drug in novel regimens. The aim of this analysis was to characterize factors contributing to the variability in exposure and to evaluate drug exposures using alternative doses, thus providing evidence to support revised dosing recommendations for drug-susceptible and multi-drug resistant tuberculosis(MDR-TB)...
June 12, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28606115/peripheral-neuropathy-in-a-diabetic-child-treated-with-linezolid-for-multidrug-resistant-tuberculosis-a-case-report-and-review-of-the-literature
#17
Aravind Swaminathan, Philipp du Cros, James A Seddon, Shamsiya Mirgayosieva, Rajabov Asladdin, Zulfiya Dusmatova
BACKGROUND: Extensively drug-resistant (XDR) tuberculosis (TB) and multidrug resistant (MDR)-TB with additional resistance to injectable agents or fluoroquinolones are challenging to treat due to lack of available, effective drugs. Linezolid is one of the few drugs that has shown promise in treating these conditions. Long-term linezolid use is associated with toxicities such as peripheral and optic neuropathies. Diabetes mellitus (DM), especially when uncontrolled, can also result in peripheral neuropathy...
June 12, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28601653/evaluation-of-the-bactec-mgit-960-system-and-the-resazurin-microtiter-assay-for-susceptibility-testing-of-mycobacterium-tuberculosis-to-second-line-drugs
#18
Juliana Failde Gallo, Juliana Maira Watanabe Pinhata, Claudia Patara Saraceni, Rosangela Siqueira de Oliveira
Drug resistance in tuberculosis is a major threat to public health and control of the disease worldwide. Given the need of a rapid and accurate detection of Mycobacterium tuberculosis resistance to second-line drugs, this study evaluated the performance of the BACTEC MGIT 960 for second-line, drug susceptibility testing in comparison with the resazurin microtiter assay (REMA), in order to implement the automated methodology in the diagnostic routine of a reference laboratory. Drug susceptibility testing (DST) for second-line drugs of 151 MDR M...
June 7, 2017: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/28598559/new-structural-classes-of-antituberculosis-agents
#19
REVIEW
Vajinder Kumar, Sanjay Patel, Rahul Jain
Tuberculosis (TB), one of the deadliest diseases is shattering the health and socioeconomic status of the society. The emergence of multidrug resistant (MDR) and extremely drug resistant (XDR) strains has provided unprecedented lethal character to TB. The development of MDR and XDR strains of TB results in more deaths, longer duration of therapy, and appearance of the disease in the immunocompromised patients. Because of the development of rapid resistance by Mycobacterium tuberculosis, researchers are confronted with serious challenges in combating TB...
June 9, 2017: Medicinal Research Reviews
https://www.readbyqxmd.com/read/28598311/in-vitro-activity-of-sitafloxacin-against-mycobacterium-tuberculosis-with-gyra-b-mutations-isolated-in-japan
#20
Lina Yi, Akio Aono, Kinuyo Chikamatsu, Yuriko Igarashi, Hiroyuki Yamada, Akiko Takaki, Satoshi Mitarai
PURPOSE: Sitafloxacin (SFX) is a new fluoroquinolone (FQ) that has shown a strong bactericidal effect against Mycobacterium tuberculosis (Mtb) in vitro. However, data on SFX efficacy against Mtb with gyrA/B mutations and its epidemiological cut-off (ECOFF) value remain limited. Therefore, we evaluated and compared the in vitro activity of SFX against gyrA/B-mutant Mtb to that of moxifloxacin (MFX), levofloxacin (LFX) and ciprofloxacin (CFX), and determined the ECOFF for SFX. METHODOLOGY: A total of 109 clinical Mtb isolates, including 73 multidrug-resistant (MDR) isolates, were subjected to minimum inhibitory concentration (MIC) analysis in oleic-albumin-dextrose-catalase (OADC)-supplemented Middlebrook 7H9 medium...
June 9, 2017: Journal of Medical Microbiology
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