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https://www.readbyqxmd.com/read/29785129/performance-of-the-abbott-realtime-mtb-rif-inh-resistance-assay-when-used-to-test-mycobacterium-tuberculosis-specimens-from-bangladesh
#1
Joshua Kostera, Gregor Leckie, Klara Abravaya, Hong Wang
Introduction: The Abbott RealTime MTB RIF/INH Resistance Assay (RT MTB RIF/INH) is an assay for the detection of rifampicin (RIF)- and/or isoniazid (INH)-resistant Mycobacterium tuberculosis (MTB). The assay can be used to test sputum, bronchial alveolar lavage, and N-Acetyl-L-Cysteine (NALC)/NaOH pellets prepared from these samples. The assay can be used in direct testing mode, or in reflex mode following a MTB positive result produced by its companion assay, Abbott RT MTB. Methods: In this study, the direct testing mode was used to test paired sputum and NALC/NaOH pellets prepared from sputum collected from Bangladesh TB patients...
2018: Infection and Drug Resistance
https://www.readbyqxmd.com/read/29779779/evaluation-of-pyrosequencing-for-extensive-drug-resistance-defining-anti-tuberculosis-drugs-for-use-in-public-healthcare
#2
Remya Nambiar, Daksha Shah, Kanchan Ajbani, Mubin Kazi, Meeta Sadani, Anjali Shetty, Padmaja Keskar, Sanjeev Kamble, Alex van Belkum, Camilla Rodrigues
MGIT 960 drug susceptibility testing (DST) for Mycobacterium tuberculosis was compared for performance and speed with pyrosequencing (PSQ). Pulmonary samples (n = 100), from GeneXpert/MTB/Rifampicin-resistant patients receiving second-line treatment for 1-3 months, were subjected to DST and PSQ for seven drugs (isoniazid, rifampicin, kanamycin, amikacin, capreomycin, moxifloxacin, and ofloxacin). The mean time-to-result was 35 and two days for DST and PSQ, respectively. Average concordancy was 92.7%. Theoretically, PSQ showed substantial incremental value over the commercial Genotype MTBDRplus/sl...
May 2018: Tuberculosis
https://www.readbyqxmd.com/read/29779766/should-all-suspected-tuberculosis-cases-in-high-income-countries-be-tested-with-genexpert
#3
Venanzio Vella, Agnieszka Broda, Francis Drobniewski
In countries with a low incidence of multidrug-resistant tuberculosis (MDR-TB), universal testing with GeneXpert might not be always cost-effective. This study provides hospital managers in low MDR-TB incidence countries with criteria on when decentralised universal GeneXpert testing would make sense. The alternatives taken into consideration include: universal microbiological culture and drug susceptibility testing (DST) only (comparator); as above but with concurrent centralized GeneXpert in a referral laboratory vs a decentralized GeneXpert system in every hospital to test smear-positive cases only; as above but testing all samples with GeneXpert regardless of smear status...
May 2018: Tuberculosis
https://www.readbyqxmd.com/read/29758242/diagnostic-accuracy-of-nucleic-acid-amplification-based-assays-for-tuberculous-meningitis-a-meta-analysis
#4
Renu Gupta, Puneet Talwar, Pumanshi Talwar, Sarbjeet Khurana, Suman Kushwaha, Nupur Jalan, Rajeev Thakur
BACKGROUND: Numerous in-house and commercial nucleic acid amplification tests (NAAT) have been evaluated using variable reference standards for diagnosis of TBM but their diagnostic potential is still not very clear. METHODS: We conducted a meta-analysis to assess the diagnostic accuracy of different NAAT based assays for diagnosing TBM against 43 data sets of confirmed TBM (n=1066) and 61 data sets of suspected TBM (n=3721) as two reference standards. The summary estimate of the sensitivity and the specificity were obtained using the bivariate model...
May 11, 2018: Journal of Infection
https://www.readbyqxmd.com/read/29752010/comparison-of-genexpert-mtb-rif-assay-and-led-fm-microscopy-for-the-diagnosis-of-extra-pulmonary-tuberculosis-in-khyber-pakhtunkhwa-pakistan
#5
Anwar Sheed Khan, Sajid Ali, Muhammad Tahir Khan, Sajjad Ahmed, Yasir Khattak, Abduljabbar, Muhammad Irfan, Wasim Sajjad
GeneXpert is one of the recent technological instruments used to diagnose tuberculosis in a short span of time. In this study, the performance of GeneXpert MTB/RIF assay for the diagnosis of extrapulmonary tuberculosis (EPTB) was compared with light-emitting diode Fluorescent Microscopy (LED-FM) in Khyber Pakhtunkhwa, Pakistan. A total of 737 EPTB samples were collected from tuberculosis (TB) suspected patients. Out of these samples, male to female ratio was 53% (n=390) to 47% (n=347) respectively. The sensitivity and specificity was 73% and 100% for GeneXpert, while 40% and 100% for LED-FM microscopy...
April 27, 2018: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/29748180/molecular-test-for-chlamydia-and-gonorrhoea-used-at-point-of-care-in-remote-primary-healthcare-settings-a-diagnostic-test-evaluation
#6
Louise M Causer, Rebecca J Guy, Sepehr N Tabrizi, David M Whiley, David John Speers, James Ward, Annie Tangey, Steven G Badman, Belinda Hengel, Lisa Jane Natoli, David A Anderson, Handan Wand, David Wilson, David G Regan, Mark Shephard, Basil Donovan, Christopher K Fairley, John M Kaldor
OBJECTIVES: A new molecular test for Chlamydia trachomatis (CT) and Neisseria gonorrhoeae (NG) (GeneXpert CT/NG) has been demonstrated to be as accurate as conventional nucleic acid amplification tests (NAAT), but performance has not been evaluated in routine primary care, performed at the point of care by clinicians. We aimed to examine its diagnostic performance when used by clinicians in remote community health services in Australia with high prevalences of CT and NG infection. The trial was registered with the Australian and New Zealand Clinical Trials Registry (#12613000808741) METHODS: At 12 health services, training was provided to 99 clinicians in the use of the GeneXpert CT/NG assay who tested specimens from all patients undergoing STI screening...
May 10, 2018: Sexually Transmitted Infections
https://www.readbyqxmd.com/read/29742144/mpt64-antigen-detection-test-improves-routine-diagnosis-of-extrapulmonary-tuberculosis-in-a-low-resource-setting-a-study-from-the-tertiary-care-hospital-in-zanzibar
#7
Melissa Davidsen Jørstad, Msafiri Marijani, Anne Ma Dyrhol-Riise, Lisbet Sviland, Tehmina Mustafa
BACKGROUND: Extrapulmonary tuberculosis (EPTB) is a diagnostic challenge. An immunochemistry-based MPT64 antigen detection test (MPT64 test) has reported higher sensitivity in the diagnosis of EPTB compared with conventional methods. The objective of this study was to implement and evaluate the MPT64 test in routine diagnostics in a low-resource setting. METHODS: Patients with presumptive EPTB were prospectively enrolled at Mnazi Mmoja Hospital, Zanzibar, and followed to the end of treatment...
2018: PloS One
https://www.readbyqxmd.com/read/29739378/higher-serum-25-hydroxyvitamin-d-concentrations-are-associated-with-active-pulmonary-tuberculosis-in-hospitalised-hiv-infected-patients-in-a-low-income-tropical-setting-a-cross-sectional-study
#8
Cuthbert Musarurwa, Lynn Sodai Zijenah, Doreen Zvipo Mhandire, Tsitsi Bandason, Kudakwashe Mhandire, Maria Mary Chipiti, Marshall Wesley Munjoma, Witmore Bayayi Mujaji
BACKGROUND: The inherent risk of developing tuberculosis (TB) in HIV- infected individuals is further enhanced by hypovitaminosis D. Interventions that offset HIV-associated immune deterioration potentially arrest disease progression and incidence of opportunistic infections including TB. Despite conflicting reports on association between vitamin D deficiency (VDD) and risk of TB, vitamin D (VD) supplementation remains a promising intervention. METHODS: We conducted a comparative cross-sectional study on 145 HIV+ /pulmonary TB+ (PTB) and 139 HIV+ /PTB- hospitalised patients to investigate association of vitamin D status and risk of PTB...
May 8, 2018: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/29735834/utility-of-genexpert-in-the-diagnosis-reliance-on-urine-microscopy-and-clinical-characteristics-of-genitourinary-tuberculosis-at-a-tertiary-care-hospital
#9
Ajaz Nabi Koul, Basharat A Kassana, Aadil Rafeeq Rather
Background: One-third of the world's population is infected with tuberculosis (TB) with new infection occurring every second. In humans, TB is primarily caused by Mycobacterium tuberculosis(MTB). Genitourinary TB (GUTB) is still a major health problem in many developing countries including India and had been declared by the World Health Organisation as 'public health emergency' in 1993. Materials and Methods: This is a prospective study conducted at a tertiary care hospital involving 46 patients who presented with clinical feature suggestive of GUTB - urine specimens of these 46 patients were analysed for acid-fast bacilli (AFB), AFB culture, GeneXpert, and other relevant investigations were done to reach the diagnosis...
January 2018: Indian Journal of Medical Microbiology
https://www.readbyqxmd.com/read/29692304/diagnostic-and-treatment-monitoring-potential-of-a-stool-based-quantitative-polymerase-chain-reaction-assay-for-pulmonary-tuberculosis
#10
Andrew R DiNardo, Alexander W Kay, Gugu Maphalala, Nadine M Harris, Celia Fung, Godwin Mtetwa, Pilar Ustero, Sindisiwe Dlamini, Ngan Ha, Edward A Graviss, Rojelio Mejia, Anna M Mandalakas
A quantifiable, stool-based, Mycobacterium tuberculosis ( Mtb ) test has potential complementary value to respiratory specimens. Limit of detection (LOD) was determined by spiking control stool. Clinical test performance was evaluated in a cohort with pulmonary tuberculosis (TB) ( N = 166) and asymptomatic household TB child contacts ( N = 105). Stool-quantifiable polymerase chain reaction (qPCR) results were compared with sputum acid-fast bacilli (AFB) microscopy, GeneXpert MTB/RIF (Xpert MTB/RIF), and cultures...
April 23, 2018: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29691960/genexpert-mtb-rif-for-rapid-diagnosis-and-rifampin-resistance-detection-of-endobronchial-tuberculosis
#11
Qin Zhang, Qing Zhang, Bing-Qi Sun, Chang Liu, An-Na Su, Xiao-Han Wang, Na Liu, Juan Zhang, Jian Kang, Gang Hou
BACKGROUND AND OBJECTIVE: Delayed diagnosis and treatment of tuberculosis (TB) contribute to poor outcomes, especially for endobronchial TB (EBTB), which typically leads to tracheobronchial stenosis. Finding rapid and accurate diagnostic tools for EBTB is crucial. GeneXpert Mycobacterium tuberculosis (MTB)/rifampin (RIF) was recommended by the World Health Organization (WHO) as a standard molecular biological diagnostic technique for MTB. The aim of this study was to evaluate the efficacy of GeneXpert MTB/RIF for diagnosing EBTB and for evaluating RIF resistance...
April 24, 2018: Respirology: Official Journal of the Asian Pacific Society of Respirology
https://www.readbyqxmd.com/read/29686171/influence-of-diabetes-mellitus-on-the-development-of-multi-drug-resistant-tuberculosis-in-yogyakarta
#12
Antonia Morita Iswari Saktiawati, Yanri Wijayanti Subronto
BACKGROUND: the correlation between diabetes mellitus (DM) and Multi-Drug-Resistant Tuberculosis (MDR-TB) has never been studied among patients with tuberculosis (TB) in Indonesia, while DM has been identified to alter immune response and pharmacokinetics of TB medications that may lead to a failure of TB treatment and develop MDR-TB. Our study aimed to analyze the influence of diabetes mellitus on the development of MDR-TB. METHODS: a retrospective cohort study was carried out on 356 TB patients at the Provincial Lung Clinics and Sardjito Hospital, Yogyakarta, Indonesia between 2010 and 2014...
January 2018: Acta Medica Indonesiana
https://www.readbyqxmd.com/read/29642905/high-use-of-private-providers-for-first-healthcare-seeking-by-drug-resistant-tuberculosis-patients-a-cross-sectional-study-in-yangon-myanmar
#13
Sucitro Dwijayana Sidharta, Jason Dean-Chen Yin, Joanne Su-Yin Yoong, Mishal Sameer Khan
BACKGROUND: Drug resistance is a growing challenge to tuberculosis (TB) control worldwide, but particularly salient to countries such as Myanmar, where the health system is fragmented across the public and private sector. A recent systematic review has identified a critical lack of evidence for local policymaking, particularly in relation to drivers of drug-resistance that could be the target of preventative efforts. To address this gap from a health systems perspective, our study investigates the healthcare-seeking behavior and preferences of recently diagnosed patients with drug-resistant tuberculosis (DR-TB), focusing on the use of private versus public healthcare providers...
April 11, 2018: BMC Health Services Research
https://www.readbyqxmd.com/read/29624560/sexual-behaviors-of-hiv-infected-pregnant-women-and-factors-associated-with-sexual-transmitted-infection-in-south-africa
#14
Dvora Joseph Davey, Remco P H Peters, Noah Kojima, Maanda Mudau, Lindsey De Vos, Dawie Olivier, James A McIntyre, Jeffrey D Klausner, Andrew Medina-Marino
BACKGROUND: Sexual behaviors in HIV-infected pregnant women in South Africa are not well understood. METHODS: HIV-infected pregnant women were recruited into a prospective cohort at first antenatal care visit. Sociodemographic information and self-collected vulvovaginal swab samples were collected from participants. Vulvovaginal swab samples were tested for Chlamydia trachomatis (CT), Neisseria gonorrhoea (NG) and Trichomonas vaginalis (TV) using GeneXpert®. We investigated sexual behaviors, alcohol use and factors associated with condomless sex during pregnancy and prevalent sexually transmitted infection (STI) among our cohort...
April 5, 2018: Sexually Transmitted Diseases
https://www.readbyqxmd.com/read/29600215/tuberculous-tenosynovitis-of-the-wrist-and-the-hand-the-3-anatomo-clinical-forms-described-by-kanavel-about-4-cases
#15
Coulibaly Ndeye Fatou, B A Amadou, Gueye Alioune Badara, Dembele Badara, Daffe Mohamedi, Dieme Charles Bertini
Introduction: Tuberculous tenosynovitis localization is rare. This unusual presentation, often misunderstood, results in frequent misdiagnosis. We report 4 cases of patients which represent the 3 anatomo-clinical forms described by Kanavel. The knowledge of its different manifestations will make it possible to recognize and to suspect the tuberculous origin. Case Report: This was a retrospective study from January 2006 to May 2017 which involved all patients received and treated with tuberculous tenosynovitis...
November 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/29599184/rapid-diagnosis-of-pulmonary-tuberculosis-by-combined-molecular-and-immunological-methods
#16
Claudia Jafari, Ioana D Olaru, Franziska Daduna, Martin Ernst, Jan Heyckendorf, Christoph Lange, Barbara Kalsdorf
Diagnosing pulmonary tuberculosis (TB) may be delayed until culture results become available.We ascertained the accuracy of a stepwise diagnostic algorithm for the rapid diagnosis of pulmonary TB by GeneXpert from sputum and/or bronchoalveolar lavage (BAL) followed by a Mycobacterium tuberculosis- specific BAL ELISPOT assay in patients with a suspected diagnosis of pulmonary TB at a clinical referral centre in Germany.Among 166 patients with a presumptive diagnosis of pulmonary TB, 81 cases were confirmed by M...
May 2018: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/29596221/increasing-prevalence-of-pediatric-drug-resistant-tuberculosis-in-mumbai-india-and-its-outcome
#17
Miti A Shah, Ira Shah
SETTING: B.J.Wadia Hospital,Mumbai OBJECTIVE:: The prevalence and type of DR-TB was evaluated pre and post-2013 and outcome was studied. DESIGN: Descriptive retrospective study. Children were defined as having DR-TB on the basis of GeneXpert or LPA and/or drug susceptibility testing(DST) of MTB grown on culture or from contact's DST. RESULTS & CONCLUSION: The prevalence of DR-TB was 110 out of 1145 cases (9.6%) which showed an increase, compared to 5...
March 24, 2018: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/29559367/comparison-in-the-yield-of-tuberculosis-among-contacts-of-multidrug-resistant-and-drug-sensitive-tuberculosis-patients-in-ethiopia-using-genexpert-as-a-primary-diagnostic-test
#18
Nebiyu Hiruy, Muluken Melese, Dereje Habte, Degu Jerene, Zewdu Gashu, Genetu Alem, Ilili Jemal, Belay Tessema, Beza Belayneh, Pedro G Suarez
OBJECTIVES: This study compared the yield of TB among contacts of multidrug-resistant tuberculosis (MDR-TB) index cases with that of drug-sensitive TB (DS-TB) index cases in a program setting. METHODS: A comparative cross-sectional study was conducted among contacts of sputum-smear-positive new index DS-TB cases and MDR-TB index cases. After contacts were screened, we used GeneXpert for the diagnosis of TB. RESULTS: The study included 111 MDR-TB and 119 DS-TB index cases...
March 17, 2018: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/29541267/programmatic-impact-of-implementing-genexpert-mtb-rif-assay-for-the-detection-of-mycobacterium-tuberculosis-in-respiratory-specimens-from-pulmonary-tuberculosis-suspected-patients-in-resource-limited-laboratory-settings-of-eastern-nepal
#19
Prakash Shrestha, Hemanta Khanal, Prasanna Dahal, Pranita Dongol
Background: In Nepal, introduction of GeneXpert MTB/RIF assay (Xpert assay) as an initial confirmation test for tuberculosis (TB) has been considered to have impact as a significant decrease in number of clinically diagnosed pulmonary tuberculosis (PTB) cases than previous years. This study aims to find out the distribution profile of suspected tuberculosis cases according to patients age, gender, treatment history and HIV status as well as to evaluate the utility of the Xpert assay over conventional acid-fast bacilli (AFB) staining method for the proper diagnosis of M...
2018: Open Microbiology Journal
https://www.readbyqxmd.com/read/29537407/disseminated-tuberculosis-diagnostic-challenges-of-atrial-tuberculoma-masquerading-as-atrial-myxoma
#20
A Alaga, Y X Yew, M K Razul
A 47-year-old female, with multiple comorbidities, presented with a cough of two months, loss of weight and appetite. She was treated for pneumonia. A chest X-ray showed bilateral reticulonodular opacities. She was noted to have a vague central abdominal mass and a systolic murmur over the mitral region. Ultrasonography and computed tomography of the abdomen showed an omental mass and loculated ascites. Oesophagoduedenoscopy showed antral gastritis and during colonoscopy the surgical team was unable to advance the scope beyond 40 cm due to external compression...
December 2017: Journal of the Royal College of Physicians of Edinburgh
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