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https://www.readbyqxmd.com/read/28429162/involvement-of-methylated-hbha-expressed-from-mycobacterium-smegmatis-in-an-ifn-%C3%AE-release-assay-to-aid-discrimination-between-latent-infection-and-active-tuberculosis-in-bcg-vaccinated-populations
#1
H-L Wen, C-L Li, G Li, Y-H Lu, H-C Li, T Li, H-M Zhao, K Wu, D B Lowrie, J-X Lv, S-H Lu, X-Y Fan
IFN-γ release assays (IGRAs) based on region of difference 1 (RD1) antigens have improved diagnosis of Mycobacterium tuberculosis (M. tb) infection. However, IGRAs with these antigens cannot discriminate between active tuberculosis (ATB) and latent tuberculosis infection (LTBI). M. tb heparin-binding-hemagglutinin (HBHA) induces relatively high IFN-γ responses in LTBI individuals and low responses in ATB patients, but purification of the native methylated HBHA from cultures of M. tb for immunological tests is complex and time-consuming...
April 20, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28428773/mutation-at-g103-of-mtbftsz-altered-their-sensitivity-to-coumarins
#2
Duggirala Sridevi, Karpagam U Sudhakar, Ragamanvitha Ananthathatmula, Rakesh P Nankar, Mukesh Doble
Coumarins are natural polyphenol lactones comprising of fused rings of benzene and α-pyrone. The current study demonstrates the inhibitory effect of coumarins with various substitutions on Mycobacterium smegmatis mc(2) 155. We also demonstrate the effect of pomegranate (Punica granatum) extract containing ellagic acid, on M. smegmatis as well as their affect on MtbFtsZ (FtsZ from Mycobacterium tuberculosis). The ellagic acid extracts from pomegranate peels inhibit mycobacteria with a MIC of 25 μM and 0.3 to 3...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28424682/interactions-between-type-1-interferons-and-the-th17-response-in-tuberculosis-lessons-learned-from-autoimmune-diseases
#3
REVIEW
Bas C Mourik, Erik Lubberts, Jurriaan E M de Steenwinkel, Tom H M Ottenhoff, Pieter J M Leenen
The classical paradigm of tuberculosis (TB) immunity, with a central protective role for Th1 responses and IFN-γ-stimulated cellular responses, has been challenged by unsatisfactory results of vaccine strategies aimed at enhancing Th1 immunity. Moreover, preclinical TB models have shown that increasing IFN-γ responses in the lungs is more damaging to the host than to the pathogen. Type 1 interferon signaling and altered Th17 responses have also been associated with active TB, but their functional roles in TB pathogenesis remain to be established...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28419146/household-crowding-as-a-potential-mediator-of-socioeconomic-determinants-of-tuberculosis-incidence-in-brazil
#4
Daniele Maria Pelissari, Fredi Alexander Diaz-Quijano
Although many studies have identified social conditions associated with tuberculosis, contextual and individual factors have rarely been analysed simultaneously. Consequently, we aimed to identify contextual and individual factors associated with tuberculosis incidence in general population in Brazil in 2010. We also assessed whether household crowding mediates the association between socioeconomic determinants and tuberculosis incidence. Individual data of tuberculosis cases were obtained from 5,565 municipalities in Brazil in 2010 (last year of national census), and merged with contextual variables...
2017: PloS One
https://www.readbyqxmd.com/read/28407810/does-task-shifting-yield-cost-savings-and-improve-efficiency-for-health-systems-a-systematic-review-of-evidence-from-low-income-and-middle-income-countries
#5
Gabriel Seidman, Rifat Atun
BACKGROUND: Task shifting has become an increasingly popular way to increase access to health services, especially in low-resource settings. Research has demonstrated that task shifting, including the use of community health workers (CHWs) to deliver care, can improve population health. This systematic review investigates whether task shifting in low-income and middle-income countries (LMICs) results in efficiency improvements by achieving cost savings. METHODS: Using the PRISMA guidelines for systematic reviews, we searched PubMed, Embase, CINAHL, and the Health Economic Evaluation Database on March 22, 2016...
April 13, 2017: Human Resources for Health
https://www.readbyqxmd.com/read/28405623/bcg-vaccination-induces-hiv-target-cell-activation-in-hiv-exposed-infants-in-a-randomized-trial
#6
Melanie A Gasper, Anneke C Hesseling, Isaac Mohar, Landon Myer, Tali Azenkot, Jo-Ann S Passmore, Willem Hanekom, Mark F Cotton, I Nicholas Crispe, Donald L Sodora, Heather B Jaspan
BACKGROUND. Bacillus Calmette-Guérin (BCG) vaccine is administered at birth to protect infants against tuberculosis throughout Africa, where most perinatal HIV-1 transmission occurs. We examined whether BCG vaccination alters the levels of activated HIV target T cells in HIV-exposed South African infants. METHODS. HIV-exposed infants were randomized to receive routine (at birth) or delayed (at 8 weeks) BCG vaccination. Activated and CCR5-expressing peripheral blood CD4(+) T cell, monocyte, and NK cell frequencies were evaluated by flow cytometry and immune gene expression via PCR using Biomark (Fluidigm)...
April 6, 2017: JCI Insight
https://www.readbyqxmd.com/read/28392698/assessment-of-isoniazid-preventive-therapy-in-the-reduction-of-tuberculosis-among-art-patients-in-arba-minch-hospital-ethiopia
#7
Ashenafi Abossie, Tsegaye Yohanes
BACKGROUND: Tuberculosis (TB) is the most frequent life-threatening opportunistic disease among people living with HIV and remains a leading cause of mortality, even among persons receiving antiretroviral therapy (ART). Isoniazid preventive therapy (IPT) and cotrimoxazole prophylaxis have been recommended for the benefit of HIV/AIDS-infected individuals to prevent opportunistic infections. The aim of this study was to assess IPT prophylaxis in the reduction of TB among ART patients. METHODS: The study was a hospital-based retrospective study...
2017: Therapeutics and Clinical Risk Management
https://www.readbyqxmd.com/read/28383411/patient-characteristics-and-perceived-health-status-of-individuals-with-hiv-and-tuberculosis-coinfection-in-guangxi-china
#8
Yujia Zhu, Jizhou Wu, Xue Feng, Huanhuan Chen, Huaxiang Lu, Li Chen, Liuhong Luo, Chao Rui
To explore demographics, clinical and medication profiles, patients' social support, and perceived health status in HIV/TB coinfected patients in Guangxi, China.We performed a cross-sectional study in the HIV clinic of the Guigang City People's Hospital (N = 150). Health professionals conducted face-to-face interviews and collected data from patients' electronic medical records regarding patients' demographic, clinical, and medication information, as well as their social support and perceived health status...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28380207/tuberculosis-control-program-in-the-municipal-context-performance-evaluation
#9
Tiemi Arakawa, Gabriela Tavares Magnabosco, Rubia Laine de Paula Andrade, Maria Eugenia Firmino Brunello, Aline Aparecida Monroe, Antonio Ruffino-Netto, Lucia Marina Scatena, Tereza Cristina Scatena Villa
OBJECTIVE: The objective of this study is to evaluate the performance of the Tuberculosis Control Program in municipalities of the State of São Paulo. METHODS: This is a program evaluation research, with ecological design, which uses three non-hierarchical groups of the municipalities of the State of São Paulo according to their performance in relation to operational indicators. We have selected 195 municipalities with at least five new cases of tuberculosis notified in the Notification System of the State of São Paulo and with 20,000 inhabitants or more in 2010...
March 30, 2017: Revista de Saúde Pública
https://www.readbyqxmd.com/read/28376709/using-structural-knowledge-in-the-protein-data-bank-to-inform-the-search-for-potential-host-microbe-protein-interactions-in-sequence-space-application-to-mycobacterium-tuberculosis
#10
Gaurang Mahajan, Shekhar C Mande
BACKGROUND: A comprehensive map of the human-M. tuberculosis (MTB) protein interactome would help fill the gaps in our understanding of the disease, and computational prediction can aid and complement experimental studies towards this end. Several sequence-based in silico approaches tap the existing data on experimentally validated protein-protein interactions (PPIs); these PPIs serve as templates from which novel interactions between pathogen and host are inferred. Such comparative approaches typically make use of local sequence alignment, which, in the absence of structural details about the interfaces mediating the template interactions, could lead to incorrect inferences, particularly when multi-domain proteins are involved...
April 4, 2017: BMC Bioinformatics
https://www.readbyqxmd.com/read/28367933/how-did-japanese-rural-dwellers-become-rapidly-healthier-in-the-two-decades-following-world-war-ii-examining-the-diverse-policy-interventions-that-improved-the-population-s-health
#11
Motoyuki Yuasa
Objective During the two decades following Japan's World War II surrender in 1945, tremendous improvement in the population's health was observed, particularly in infant mortality and life expectancy. How did Japanese rural dwellers achieve such remarkable health improvement during this relatively short time span while its economy remained heavily damaged following the war? While the efforts from government-driven public health strategies and programs are well known, relatively little is known about the contributions of policies in non-health sectors...
2017: [Nihon Kōshū Eisei Zasshi] Japanese Journal of Public Health
https://www.readbyqxmd.com/read/28367350/immune-reconstitution-inflammatory-syndrome-occurring-in-a-kidney-transplant-patient-with-extrapulmonary-tuberculosis
#12
Jose Iglesias, Kandria Jumil Ledesma, Paul J Couto, Jessie Liu
Tuberculosis (TB) occurring in solid organ transplantation (SOT) is associated with significant morbidity and mortality usually due to delays in diagnosis, drug toxicity encountered with antimycobacterial therapy, and drug-drug interactions. TB in SOT patients may mimic other infectious and noninfectious posttransplant complications such as posttransplant lymphoproliferative disorder (PTLD) and systemic cytomegalovirus infection. Immune reconstitution inflammatory syndrome (IRIS) is a host response resulting in paradoxical worsening of an infectious disease which occurs after the employment of effective therapy and reversal of an immunosuppressed state...
2017: Case Reports in Transplantation
https://www.readbyqxmd.com/read/28364561/comprehensiveness-of-hiv-care-provided-at-global-hiv-treatment-sites-in-the-iedea-consortium-2009-and-2014
#13
Cristin Q Fritz, Meridith Blevins, Mary Lou Lindegren, Kara Wools-Kaloutsian, Beverly S Musick, Morna Cornell, Kelly Goodwin, Dianne Addison, Jean Claude Dusingize, Eugène Messou, Armel Poda, Stephany N Duda, Catherine C McGowan, Matthew G Law, Richard D Moore, Aimee Freeman, Denis Nash, C William Wester
INTRODUCTION: An important determinant of the effectiveness of HIV treatment programs is the capacity of sites to implement recommended services and identify systematic changes needed to ensure that invested resources translate into improved patient outcomes. We conducted a survey in 2014 of HIV care and treatment sites in the seven regions of the International epidemiologic Database to Evaluate AIDS (IeDEA) Consortium to evaluate facility characteristics, HIV prevention, care and treatment services provided, laboratory capacity, and trends in the comprehensiveness of care compared to data obtained in the 2009 baseline survey...
January 6, 2017: Journal of the International AIDS Society
https://www.readbyqxmd.com/read/28358846/risk-factors-associated-with-tuberculosis-tb-among-people-living-with-hiv-aids-a-pair-matched-case-control-study-in-guangxi-china
#14
Zhezhe Cui, Mei Lin, Shaofa Nie, Rushu Lan
BACKGROUND: As one of the poorest provinces in China, Guangxi has a high HIV and TB prevalence, with the annual number of TB/HIV cases reported by health department among the highest in the country. However, studies on the burden of TB-HIV co-infection and risk factors for active TB among HIV-infected persons in Guangxi have rarely been reported. OBJECTIVE: To investigate the risk factors for active TB among people living with HIV/AIDS in Guangxi Zhuang autonomous region, China...
2017: PloS One
https://www.readbyqxmd.com/read/28355052/design-synthesis-and-experimental-validation-of-peptide-ligands-targeting-mycobacterium-tuberculosis-%C3%AF-factors
#15
Sneha Vishwanath, Sunaina Banerjee, Anil Kumar Jamithireddy, Narayanaswamy Srinivasan, Balasubramanian Gopal, Jayanta Chatterjee
Transcription in prokaryotes is a multi-step process and is primarily regulated at the initiation stage. Sigma factors are involved in promoter recognition and thus govern prokaryotic gene expression. Mycobacterium tuberculosis sigma factors have been previously suggested as important drug targets through large-scale genome analyses. Here we demonstrate the feasibility of specific targeting of Mtb sigma factors using designed peptides. A peptide library was generated using 3-D structural features corresponding to the interface regions of sigma factors and the RNAP...
March 29, 2017: Biochemistry
https://www.readbyqxmd.com/read/28346784/structure-determination-of-mycobacterium-tuberculosis-serine-protease-hip1-rv2224c
#16
Jacqueline Lara Naffin-Olivos, Andrew Daab, Andre White, Nathan Eric Goldfarb, Amy C Milne, Dali Liu, Jacqueline Baikovitz, Ben M Dunn, Jyothi Rengarajan, Gregory A Petsko, Dagmar Ringe
The Mycobacterium tuberculosis (Mtb) serine protease Hip1 (Hydrolase important for pathogenesis; Rv2224c) promotes tuberculosis (TB) pathogenesis by impairing host immune responses through proteolysis of a protein substrate, Mtb GroEL2. The cell surface localization of Hip1 and its immunomodulatory functions make Hip1 a good drug target for new adjunctive immune therapies for TB. Here we report the crystal structure of Hip1 to a resolution of 2.6 Å and the kinetic studies of the enzyme against model substrates and the protein GroEL2...
March 27, 2017: Biochemistry
https://www.readbyqxmd.com/read/28340619/operational-and-implementation-research-within-global-fund-to-fight-aids-tuberculosis-and-malaria-grants-a-situation-analysis-in-six-countries
#17
Sabine Kiefer, Astrid M Knoblauch, Peter Steinmann, Tanja Barth-Jaeggi, Mahnaz Vahedi, Dermot Maher, Jürg Utzinger, Kaspar Wyss
BACKGROUND: Operational/implementation research (OR/IR) is a key activity to improve disease control programme performance. We assessed the extent to which malaria and tuberculosis (TB) grants from the Global Fund to Fight AIDS, Tuberculosis and Malaria ("Global Fund") include support for OR/IR, and discuss the implications of the current Global Fund operating mechanisms for OR/IR support. METHODS: The situation analysis focussed on malaria and TB, while HIV was excluded...
March 24, 2017: Globalization and Health
https://www.readbyqxmd.com/read/28334030/measuring-mortality-due-to-hiv-associated-tuberculosis-among-adults-in-south-africa-comparing-verbal-autopsy-minimally-invasive-autopsy-and-research-data
#18
Aaron S Karat, Mpho Tlali, Katherine L Fielding, Salome Charalambous, Violet N Chihota, Gavin J Churchyard, Yasmeen Hanifa, Suzanne Johnson, Kerrigan McCarthy, Neil A Martinson, Tanvier Omar, Kathleen Kahn, Daniel Chandramohan, Alison D Grant
BACKGROUND: The World Health Organization (WHO) aims to reduce tuberculosis (TB) deaths by 95% by 2035; tracking progress requires accurate measurement of TB mortality. International Classification of Diseases (ICD) codes do not differentiate between HIV-associated TB and HIV more generally. Verbal autopsy (VA) is used to estimate cause of death (CoD) patterns but has mostly been validated against a suboptimal gold standard for HIV and TB. This study, conducted among HIV-positive adults, aimed to estimate the accuracy of VA in ascertaining TB and HIV CoD when compared to a reference standard derived from a variety of clinical sources including, in some, minimally-invasive autopsy (MIA)...
2017: PloS One
https://www.readbyqxmd.com/read/28331263/clinical-profile-of-surgical-diseases-with-emergence-of-new-problems-in-hiv-individuals
#19
Tejaswini Vallabha, Mandar Dhamangaonkar, Vikram Sindgikar, Ravindra Nidoni, Harshavardhan Biradar, Aniketan Kv, Ramakant Baloorkar
North Karnataka is one of the regions with the high prevalence of HIV+ individuals. Bijapur is a district in North Karnataka with high prevalence as per fact sheets of NACO of March 2012. Better awareness, access to health care, and antiretroviral therapy have improved survival and increase in number of people living with HIV/AIDS (PLHA). Improved survival has increased their attendance to hospitals with variety of surgical problems, some known and some less known. The percentage of HIV+ individuals was 1.64 % among all admissions...
February 2017: Indian Journal of Surgery
https://www.readbyqxmd.com/read/28329668/stevens-johnson-syndrome-and-toxic-epidermal-necrolysis-in-us-adults
#20
Derek Y Hsu
Stevens-Johnson syndrome (SJS) and toxic epidermal necrolysis (TEN) are life-threatening disorders. The incidences, mortality and cost of SJS and TEN in US adults are not well-characterized. We analyzed data from the 2009-2012 Nationwide Inpatient Sample, containing a representative 20% sample of all hospitalizations in the US. SJS, SJS/TEN and TEN were identified by a validated algorithm using ICD-9- CM codes. The mean incidences of SJS, SJS/TEN and TEN were 9.3, 1.6, and 1.9 per million people per year, respectively...
September 15, 2016: Dermatology Online Journal
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