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https://www.readbyqxmd.com/read/28086877/treating-the-invisible-gaps-and-opportunities-for-enhanced-tb-control-along-the-thailand-myanmar-border
#1
Naomi Tschirhart, Sein Sein Thi, Lei Lei Swe, Francois Nosten, Angel M Foster
BACKGROUND: In Thailand's northwestern Tak province, contextual conditions along the border with Myanmar pose difficulties for TB control among migrant populations. Incomplete surveillance data, migrant patient mobility, and loss to follow-up make it difficult to estimate the TB burden and implement effective TB control measures. This multi-methods study examined tuberculosis, tuberculosis and human immunodeficiency virus co-infection, and multidrug-resistant tuberculosis treatment accessibility for migrants and refugees in Tak province, health system response, and public health surveillance...
January 13, 2017: BMC Health Services Research
https://www.readbyqxmd.com/read/28076388/risk-factors-for-multi-drug-resistant-pathogens-and-failure-of-empiric-first-line-therapy-in-acute-cholangitis
#2
Philipp A Reuken, Dorian Torres, Michael Baier, Bettina Löffler, Christoph Lübbert, Norman Lippmann, Andreas Stallmach, Tony Bruns
BACKGROUND: Acute cholangitis (AC) requires the immediate initiation of antibiotic therapy in addition to treatment for biliary obstruction. Against a background of an increasing prevalence of multi-drug resistant (MDR) bacteria, the risk factors for the failure of empiric therapy must be defined. METHODS: Using a pathogen-based approach, 1764 isolates from positive bile duct cultures were retrospectively analyzed to characterize the respective pathogen spectra in two German tertiary centers...
2017: PloS One
https://www.readbyqxmd.com/read/28073967/dna-replication-proteins-as-potential-targets-for-antimicrobials-in-drug-resistant-bacterial-pathogens
#3
REVIEW
Erika van Eijk, Bert Wittekoek, Ed J Kuijper, Wiep Klaas Smits
With the impending crisis of antimicrobial resistance, there is an urgent need to develop novel antimicrobials to combat difficult infections and MDR pathogenic microorganisms. DNA replication is essential for cell viability and is therefore an attractive target for antimicrobials. Although several antimicrobials targeting DNA replication proteins have been developed to date, gyrase/topoisomerase inhibitors are the only class widely used in the clinic. Given the numerous essential proteins in the bacterial replisome that may serve as a potential target for inhibitors and the relative paucity of suitable compounds, it is evident that antimicrobials targeting the replisome are underdeveloped so far...
January 10, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28070309/bacterial-etiology-of-bloodstream-infections-and-antimicrobial-resistance-in-dhaka-bangladesh-2005-2014
#4
Dilruba Ahmed, Md Ausrafuggaman Nahid, Abdullah Bashar Sami, Farhana Halim, Nasrin Akter, Tuhin Sadique, Md Sohel Rana, Md Shahriar Bin Elahi, Md Mahbubur Rahman
BACKGROUND: Bloodstream infections due to bacterial pathogens are a major cause of morbidity and mortality in Bangladesh and other developing countries. In these countries, most patients are treated empirically based on their clinical symptoms. Therefore, up to date etiological data for major pathogens causing bloodstream infections may play a positive role in better healthcare management. The aim of this study was to identify the bacterial pathogens causing major bloodstream infections in Dhaka, Bangladesh and determine their antibiotic susceptibility pattern...
2017: Antimicrobial Resistance and Infection Control
https://www.readbyqxmd.com/read/28069652/antimicrobial-susceptibility-of-pseudomonas-aeruginosa-results-from-four-years-2012-2015-of-the-international-network-for-optimal-resistance-monitoring-inform-program-in-the-united-states
#5
Helio S Sader, Michael D Huband, Mariana Castanheira, Robert K Flamm
Pseudomonas aeruginosa represents a major cause of health-care associated infections, and inappropriate initial antimicrobial therapy is associated with increased morbidity and mortality. The International Network for Optimal Resistance Monitoring (INFORM) program monitors the in vitro activity of ceftazidime-avibactam and many comparators agents. We evaluated the antimicrobial susceptibility of 7,452 P. aeruginosa isolates collected from 79 USA medical centers in 2012-2015. The isolates were collected and tested consecutively for susceptibility by broth microdilution method...
January 9, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28068907/hospitalized-care-for-mdr-tb-in-port-harcourt-nigeria-a-qualitative-study
#6
Kingsley Lezor Bieh, Ralf Weigel, Helen Smith
BACKGROUND: In Nigeria multidrug-resistant tuberculosis (MDR-TB) is prevalent in 2.9% of new TB cases and 14% of retreatment cases, and the country is one of 27 with high disease burden globally. Patients are admitted and confined to one of ten MDR-TB treatment facilities throughout the initial 8 months of treatment. The perspectives of MDR-TB patients shared on social media and in academic research and those of providers are limited to experiences of home-based care. In this study we explored the views of hospitalised MDR-TB patients and providers in one treatment facility in Nigeria, and describe how their experiences are linked to accessibility of care and support services, in line with international goals...
January 10, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28067286/a-novel-chimeric-lysin-with-robust-antibacterial-activity-against-planktonic-and-biofilm-methicillin-resistant-staphylococcus-aureus
#7
Hang Yang, Huaidong Zhang, Jing Wang, Junping Yu, Hongping Wei
Methicillin-resistant Staphylococcus aureus (MRSA) is one of the most threatening pathogens due to its multi-drug resistance (MDR) and strong biofilm-forming capacity. Here, we described the screening of a novel chimeolysin (ClyF) that was active against planktonic and biofilm MRSA. Biochemical tests showed that ClyF was active against all S. aureus clinical isolates tested under planktonic and biofilm conditions. Structure analysis revealed that ClyF has an enhanced thermostability and pH tolerance than its parental lysin Pc by forming a hydrophobic cleft in the catalytic domain and an Ig-like structure in the cell-wall binding domain...
January 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28062557/fosfomycin-mechanism-and-resistance
#8
Lynn L Silver
Fosfomycin, a natural product antibiotic, has been in use for >20 years in Spain, Germany, France, Japan, Brazil, and South Africa for urinary tract infections (UTIs) and other indications and was registered in the United States for the oral treatment of uncomplicated UTIs because of Enterococcus faecalis and Escherichia coli in 1996. It has a broad spectrum, is bactericidal, has very low toxicity, and acts as a time-dependent inhibitor of the MurA enzyme, which catalyzes the first committed step of peptidoglycan synthesis...
January 6, 2017: Cold Spring Harbor Perspectives in Medicine
https://www.readbyqxmd.com/read/28062386/rna-expression-analysis-of-efflux-pump-genes-in-clinical-isolates-of-multidrug-resistant-and-extensively-drug-resistant-mycobacterium-tuberculosis-in-south-korea
#9
Tae Sang Oh, Young Jin Kim, Hee Yoon Kang, Chang-Ki Kim, Sun Young Cho, Hee Joo Lee
Tuberculosis (TB), caused by infection with Mycobacterium tuberculosis, is an important communicable disease. Various mechanisms of resistance to antituberculosis drugs have been reported; these are principally mutations in target genes. However, not all M. tuberculosis resistance can be explained by mutations in such genes. Other resistance mechanisms associated with drug transport, such as efflux pumps, have also been reported. In this study, we investigated the expression levels of three putative efflux pumps and mutations in target genes associated with injectable agents and fluoroquinolones with clinical MDR and XDR-TB isolates...
January 3, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28061948/levels-of-microrna-mir-16-and-mir-155-are-altered-in-serum-of-patients-with-tuberculosis-and-associate-with-responses-to-therapy
#10
Vishal Wagh, Anant Urhekar, Deepak Modi
Identification of blood biomarkers that can be useful for predicting Mycobacterium tuberculosis (M.TB) infection, effect of therapy and Multi Drug Resistant (MDR) TB infected individuals is clinically useful for combating tuberculosis epidemic. In this study, we have evaluated the levels of selected miRNAs in serum of TB and MDR TB patients. In addition, we have studied their levels in serum of patients post-therapy. The levels of 4-miRNAs (miR-16, miR-29a, miR-125b and miR-155) were measured in 30 newly diagnosed TB patients, 19 Multi Drug Resistant (MDR) TB patients, 10 patients who completed TB therapy and were TB negative...
January 2017: Tuberculosis
https://www.readbyqxmd.com/read/28061888/antibacterial-activities-of-the-methanol-extract-fractions-and-compounds-from-elaeophorbia-drupifera-thonn-stapf-euphorbiaceae
#11
Igor K Voukeng, Blaise K Nganou, Louis P Sandjo, Ilhami Celik, Veronique P Beng, Pierre Tane, Victor Kuete
BACKGROUND: Elaeophorbia drupifera (Thonn.) Stapf. (Euphorbiaceae) is used in Cameroonian folk medicine to treat several ailments including bacterial-related diseases such as skin infections. In this study, the methanol extract from the leaves (EDL), fractions (EDLa-d), sub-fractions EDLc1-7 and EDLc31-35 as well as isolated compounds were tested for their antimicrobial activities against a panel of Gram-negative and Gram-positive bacteria including multidrug resistant (MDR) phenotypes...
January 7, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28061832/high-rates-of-multidrug-resistant-and-rifampicin-resistant-tuberculosis-among-re-treatment-cases-where-do-they-come-from
#12
Romain Ragonnet, James M Trauer, Justin T Denholm, Ben J Marais, Emma S McBryde
BACKGROUND: Globally 3.9% of new and 21% of re-treatment tuberculosis (TB) cases are multidrug-resistant or rifampicin-resistant (MDR/RR), which is often interpreted as evidence that drug resistance results mainly from poor treatment adherence. This study aims to assess the respective contributions of the different causal pathways leading to MDR/RR-TB at re-treatment. METHODS: We use a simple mathematical model to simulate progression between the different stages of disease and treatment for patients diagnosed with TB...
January 6, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28057421/preparation-and-biological-evaluation-of-ethionamide-mesoporous-silicon-nanoparticles-against-mycobacterium-tuberculosis
#13
Nuno Vale, Alexandra Correia, Sara Silva, Patrícia Figueiredo, Ermei Mäkilä, Jarno Salonen, Jouni Hirvonen, Jorge Pedrosa, Hélder A Santos, Alexandra Fraga
Ethionamide (ETH) is an important second-line antituberculosis drug used for the treatment of patients infected with multidrug-resistant Mycobacterium tuberculosis. Recently, we reported that the loading of ETH into thermally carbonized-porous silicon (TCPSi) nanoparticles enhanced the solubility and permeability of ETH at different pH-values and also increased its metabolization process. Based on these results, we synthesized carboxylic acid functionalized thermally hydrocarbonized porous silicon nanoparticles (UnTHCPSi NPs) conjugated with ETH and its antimicrobial effect was evaluated against Mycobacterium tuberculosis strain H37Rv...
December 26, 2016: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28057041/rifampicin-resistance-pattern-of-mycobacterium-tuberculosis-and-associated-factors-among-presumptive-tuberculosis-patients-referred-to-debre-markos-referral-hospital-ethiopia-a-cross-sectional-study
#14
Wondemagegn Mulu, Bayeh Abera, Mulat Yimer, Tadesse Hailu, Haimanot Ayele, Dereje Abate
BACKGROUND: Prevailing data on rifampicin-resistant M. tuberculosis is essential for early management of MDR-TB. Therefore, this study was conducted to determine the prevalence of rifampicin-resistant Mycobacterium tuberculosis and associated factors among presumptive TB cases in Debre Markos Referral Hospital, Ethiopia. METHODS: A cross-sectional study was conducted from September 2014 to March 2015. Detection of M. tuberculosis and resistance to rifampicin was performed using Gene Xpert MTB/RIF assay...
January 3, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28056828/pneumococcal-carriage-and-antibiotic-susceptibility-patterns-from-two-cross-sectional-colonization-surveys-among-children-aged-5-years-prior-to-the-introduction-of-10-valent-pneumococcal-conjugate-vaccine-kenya-2009-2010
#15
Miwako Kobayashi, Laura M Conklin, Godfrey Bigogo, Geofrey Jagero, Lee Hampton, Katherine E Fleming-Dutra, Muthoni Junghae, Maria da Gloria Carvalho, Fabiana Pimenta, Bernard Beall, Thomas Taylor, Kayla F Laserson, John Vulule, Chris Van Beneden, Lindsay Kim, Daniel R Feikin, Cynthia G Whitney, Robert F Breiman
BACKGROUND: Pneumococci are spread by persons with nasopharyngeal colonization, a necessary precursor to invasive disease. Pneumococcal conjugate vaccines can prevent colonization with vaccine serotype strains. In 2011, Kenya became one of the first African countries to introduce the 10-valent pneumococcal conjugate vaccine (PCV10) into its national immunization program. Serial cross-sectional colonization surveys were conducted to assess baseline pneumococcal colonization, antibiotic resistance patterns, and factors associated with resistance...
January 5, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28056222/in-vitro-activity-of-antimicrobial-agents-against-multidrug-and-extensively-drug-resistant-acinetobacter-baumannii
#16
Francielli Mahnic Vasconcellos, Monique Ribeiro Tiba Casas, Lais Calissi Brisolla Tavares, Doroti Oliveira Garcia, Carlos Henrique Camargo
Multidrug- (MDR) and extensively drug-resistant (XDR) Acinetobacter baumannii (Ab) difficult the treatment of severe infections. We evaluated the in vitro activity of antimicrobial agents against 71 carbapenem-resistant clonal diverse clinical Ab strains recovered from Brazilian hospitals. Minocycline and polypeptides presented activity against >98% of the isolates, indicating their potential against MDR or XDR carbapenem-resistant Acinetobacter baumannii from main clones circulating in Brazil.
January 5, 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28043788/comparison-of-bacteriological-conversion-and-treatment-outcomes-among-mdr-tb-patients-with-and-without-diabetes-in-mexico-preliminary-data
#17
M Muñoz-Torrico, J Caminero Luna, G B Migliori, L D'Ambrosio, J L Carrillo-Alduenda, H Villareal-Velarde, A Torres-Cruz, H Flores-Ergara, D Martínez-Mendoza, C García-Sancho, R Centis, M Á Salazar-Lezama, R Pérez-Padilla
: Diabetes mellitus (DM) is a well-known risk factor for tuberculosis (TB). However, it is not known to what extent DM affects the outcome in patients with multidrug-resistant (MDR-TB) and extensively drug-resistant TB (XDR-TB) treated with second-line anti-TB drugs. The objective of this study was to compare the microbiological evolution (sputum smear and culture conversion) and final outcomes of MDR/XDR-TB patients with and without DM, managed at the national TB reference centre in Mexico City...
December 30, 2016: Revista Portuguesa de Pneumologia
https://www.readbyqxmd.com/read/28043617/bedaquiline-in-the-multidrug-resistant-tuberculosis-treatment-belarus-experience
#18
Alena Skrahina, Hennadz Hurevich, Dennis Falzon, Liudmila Zhilevich, Valiantsin Rusovich, Masoud Dara, Svetlana Setkina
BACKGROUND/OBJECTIVE: Outcomes of treatment for multidrug-resistant tuberculosis (MDR-TB) remain poor worldwide. Among patients with MDR-TB in Belarus who started treatment in 2012, only 54% completed it successfully, with treatment failure reported in 22% of the patients; additionally, 11% died and 13% were lost to follow-up or remained unevaluated. In Belarus, to improve outcomes, bedaquiline was introduced in MDR-TB treatment in June 2015. The national TB program developed measures to monitor safety and effectiveness of bedaquiline-containing regimens in line with the World Health Organization recommendations...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28043614/multidrug-resistant-tuberculosis-the-problem-and-some-priorities-in-controlling-it
#19
Sven Hoffner
Multidrug-resistant tuberculosis (MDR-TB), and even more severe forms of drug resistance, cause significant problems and costs for national TB control programs and constitutes an increasing public health concern globally. In parts of the former Soviet Union, the prevalence of MDR-TB is as high as 50% and one third of all newly detected TB patients are infected with MDR strains. Such strains transmit and certain MDR-TB clones constitute an important part of the problem, especially in high MDR-TB burden areas...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28043580/application-of-highly-portable-minion-nanopore-sequencing-technology-for-the-monitoring-of-nosocomial-tuberculosis-infection
#20
Matthew Bates, Pascal Polepole, Nathan Kapata, Matt Loose, Justin O'Grady
Referral hospitals in sub-Saharan Africa concentrate large numbers of tuberculosis (TB) and multidrug-resistant TB (MDR-TB) patients, failed by community TB services. We have previously shown, from enhanced screening and through autopsy studies, a significant burden of missed TB infections at the University Teaching Hospital, Lusaka, Zambia, with many patients dying or being discharged without treatment. With minimal TB isolation facilities and minimal political will to invest in broader screening and isolation, the risk of nosocomial transmission is likely to be extremely high...
December 2016: International Journal of Mycobacteriology
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