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Low resource diagnostics

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https://www.readbyqxmd.com/read/28334270/development-of-diagnostic-insecticide-concentrations-and-assessment-of-insecticide-susceptibility-in-german-cockroach-dictyoptera-blattellidae-field-strains-collected-from-public-housing
#1
Mahsa Fardisi, Ameya D Gondhalekar, Michael E Scharf
Insecticide resistance in German cockroaches (Blattella germanica (L.)) has been a barrier to effective control since its first documentation in the 1950s. A necessary first step toward managing resistance is to understand insecticide susceptibility profiles in field-collected strains so that active ingredients (AIs) with lowest resistance levels can be identified. As a first step in this study, diagnostic concentrations (DCs) were determined for 14 insecticide AIs based on lethal concentrations that killed 99% or 90% of the individuals from a susceptible lab strain (JWax-S)...
March 20, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28330453/a-systematic-review-of-primary-care-models-for-non-communicable-disease-interventions-in-sub-saharan-africa
#2
Jennifer Kane, Megan Landes, Christopher Carroll, Amy Nolen, Sumeet Sodhi
BACKGROUND: Chronic diseases, primarily cardiovascular disease, respiratory disease, diabetes and cancer, are the leading cause of death and disability worldwide. In sub-Saharan Africa (SSA), where communicable disease prevalence still outweighs that of non-communicable disease (NCDs), rates of NCDs are rapidly rising and evidence for primary healthcare approaches for these emerging NCDs is needed. METHODS: A systematic review and evidence synthesis of primary care approaches for chronic disease in SSA...
March 23, 2017: BMC Family Practice
https://www.readbyqxmd.com/read/28323868/-waiting-for-daas-a-retrospective-chart-review-of-patients-with-untreated-hepatitis-c-in-rwanda
#3
Neil Gupta, Jules Kabahizi, Constance Mukabatsinda, Timothy David Walker, Emmanuel Musabeyezu, Athanase Kiromera, Jennifer Ilo Van Nuil, Kevin Steiner, Joia Mukherjee, Sabin Nsanzimana, Aimable Mbituyumuremyi
BACKGROUND: Access to treatment for hepatitis C virus (HCV) in sub-Saharan Africa is extremely limited. With the advent of direct acting antivirals (DAAs), highly effective and easy-to-deliver oral regimens are now available on the global market. This study was conducted to understand the background and characteristics of a national cohort of patients with HCV infection enrolled in care and awaiting therapy with DAAs. METHODS AND FINDINGS: We conducted a retrospective chart review of all adult patients with confirmed HCV infection who were currently enrolled in care and treatment at the four existing hepatitis referral centers in Rwanda...
2017: PloS One
https://www.readbyqxmd.com/read/28319242/quality-of-cancer-surveillance-clinical-practice-guidelines-specificity-and-consistency-of-recommendations
#4
Ryan P Merkow, Deborah Korenstein, Rubaya Yeahia, Peter B Bach, Shrujal S Baxi
Importance: Primary care clinicians, who are increasingly responsible for caring for the growing population of cancer survivors, may be unfamiliar with appropriate cancer surveillance strategies. Clinical practice guidelines can inform cancer follow-up care and surveillance testing. Vague recommendations and inconsistencies among guidelines can lead to overuse and underuse of health care resources and have a negative impact on cost and quality of survivorship care. Objective: To examine the specificity and consistency of recommendations for surveillance after active treatment across cancer guidelines...
March 20, 2017: JAMA Internal Medicine
https://www.readbyqxmd.com/read/28306597/diagnosis-of-viral-hepatitis
#5
Philippa J Easterbrook, Teri Roberts, Anita Sands, Rosanna Peeling
PURPOSE OF REVIEW: Chronic hepatitis B virus (HBV) and hepatitis C virus (HCV) infections and HIV-HBV and HCV coinfection are major causes of chronic liver disease worldwide. Testing and diagnosis is the gateway for access to both treatment and prevention services, but there remains a large burden of undiagnosed infection globally. We review the global epidemiology, key challenges in the current hepatitis testing response, new tools to support the hepatitis global response (2016-2020 Global Hepatitis Health Sector strategy, and 2017 WHO guidelines on hepatitis testing and their key recommendations) and future directions and innovations in hepatitis diagnostics...
March 16, 2017: Current Opinion in HIV and AIDS
https://www.readbyqxmd.com/read/28297296/development-of-a-universal-medical-x-ray-imaging-phantom-prototype
#6
Annemari Groenewald, Willem A Groenewald
Diagnostic X-ray imaging depends on the maintenance of image quality that allows for proper diagnosis of medical conditions. Maintenance of image quality requires quality assurance programs on the various X-ray modalities, which consist of projection radiography (including mobile X-ray units), fluoroscopy, mammography, and computed tomography (CT) scanning. Currently a variety of modality-specific phantoms are used to perform quality assurance (QA) tests. These phantoms are not only expensive, but suitably trained personnel are needed to successfully use them and interpret the results...
November 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28296882/detection-and-characterization-of-brucella-spp-in-bovine-milk-in-small-scale-urban-and-peri-urban-farming-in-tajikistan
#7
Elisabeth Lindahl-Rajala, Tove Hoffman, David Fretin, Jacques Godfroid, Nosirjon Sattorov, Sofia Boqvist, Åke Lundkvist, Ulf Magnusson
Brucellosis is one of the most common zoonoses globally, and Central Asia remains a Brucella hotspot. The World Health Organization classifies brucellosis as a neglected zoonotic disease that is rarely in the spotlight for research and mainly affects poor, marginalized people. Urban and peri-urban farming is a common practice in many low-income countries, and it increases the incomes of families that are often restrained by limited economic resources. However, there is a concern that the growing number of people and livestock living close together in these areas will increase the transmission of zoonotic pathogens such as Brucella...
March 15, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28281262/streak-imaging-flow-cytometer-for-rare-cell-analysis
#8
Joshua Balsam, Hugh Alan Bruck, Miguel Ossandon, Ben Prickril, Avraham Rasooly
There is a need for simple and affordable techniques for cytology for clinical applications, especially for point-of-care (POC) medical diagnostics in resource-poor settings. However, this often requires adapting expensive and complex laboratory-based techniques that often require significant power and are too massive to transport easily. One such technique is flow cytometry, which has great potential for modification due to the simplicity of the principle of optical tracking of cells. However, it is limited in that regard due to the flow focusing technique used to isolate cells for optical detection...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28281261/smartphone-enabled-detection-strategies-for-portable-pcr-based-diagnostics
#9
Aashish Priye, Victor M Ugaz
Incredible progress continues to be made toward development of low-cost nucleic acid-based diagnostic solutions suitable for deployment in resource-limited settings. Detection components play a vitally important role in these systems, but have proven challenging to adapt for operation in a portable format. Here we describe efforts aimed at leveraging the capabilities of consumer-class smartphones as a convenient platform to enable detection of nucleic acid products associated with DNA amplification via the polymerase chain reaction (PCR)...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28279508/tuberculosis-elimination-and-the-challenge-of-latent-tuberculosis
#10
Alberto Matteelli, Giorgia Sulis, Susanna Capone, Lia D'Ambrosio, Giovanni Battista Migliori, Haileyesus Getahun
Latent tuberculosis infection (LTBI) affects one third to one fourth of the human population and is the reservoir for a significant proportion of emerging active tuberculosis (TB) cases, especially in low incidence countries. The World Health Organization launched in 2015 the END-TB strategy that aims at TB elimination and promotes, for the first time ever, the management of LTBI. The preventive package, basically consisting of testing and treatment for LTBI in groups at high risk of reactivation, is a mainstay of the first pillar of the strategy, alongside prompt diagnosis and early treatment of both drug-susceptible and drug-resistant TB disease...
March 6, 2017: La Presse Médicale
https://www.readbyqxmd.com/read/28277337/biomarkers-of-environmental-enteric-dysfunction-among-children-in-rural-bangladesh
#11
Rebecca K Campbell, Kerry Schulze, Saijuddin Shaikh, Sucheta Mehra, Hasmot Ali, Lee Wu, Rubhana Raqib, Sarah Baker, Alain Labrique, Keith P West, Parul Christian
OBJECTIVES: Environmental enteric dysfunction (EED) may inhibit growth and development in low- and middle-income countries, but available assessment methodologies limit its study. In rural Bangladesh, we measured EED using the widely-used lactulose mannitol ratio (L:M) test and a panel of intestinal and systemic health biomarkers to evaluate convergence among biomarkers and describe risk factors for EED. METHODS: In 539 18-month-old children finishing participation in a randomized food supplementation trial, serum, stool and urine collected after lactulose and mannitol dosing were analyzed for biomarkers of intestinal absorption, inflammation, permeability and repair, and systemic inflammation...
March 8, 2017: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/28275072/strategies-for-optimizing-the-diagnostic-predictive-value-of-clostridium-difficile-molecular-diagnostics
#12
Larry K Kociolek
Because nucleic acid amplification tests (NAATs) do not distinguish Clostridium difficile infection (CDI) and asymptomatic C. difficile carriage, the diagnostic predictive value of NAATs is limited when used in patients with low probability of CDI. In this issue of the Journal of Clinical Microbiology, Truong et al. report significant reductions in hospital-onset CDI and oral vancomycin utilization at their institution following implementation of a novel intervention that leveraged their clinical bioinformatics resources to prevent C...
March 8, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28270202/rheumatology-in-africa-challenges-and-opportunities
#13
EDITORIAL
Girish M Mody
Africa faces many health challenges despite sustained growth and development over the past decade. Contributory factors are the lack of financial resources, an inadequate health professional workforce, a high burden of communicable diseases, and an increasing burden of non-communicable diseases. Rheumatology services are limited or non-existent in many parts of sub-Saharan Africa. Over the past decade, partnerships with international academic institutions have resulted in some progress in the training of rheumatologists and health professionals and development of rheumatology services in countries such as Kenya, Nigeria, and Zambia...
March 7, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/28268332/towards-an-unsupervised-device-for-the-diagnosis-of-childhood-pneumonia-in-low-resource-settings-automatic-segmentation-of-respiratory-sounds
#14
J Sola, F Braun, E Muntane, C Verjus, M Bertschi, F Hugon, S Manzano, M Benissa, A Gervaix
Pneumonia remains the worldwide leading cause of children mortality under the age of five, with every year 1.4 million deaths. Unfortunately, in low resource settings, very limited diagnostic support aids are provided to point-of-care practitioners. Current UNICEF/WHO case management algorithm relies on the use of a chronometer to manually count breath rates on pediatric patients: there is thus a major need for more sophisticated tools to diagnose pneumonia that increase sensitivity and specificity of breath-rate-based algorithms...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28267274/utility-of-touch-imprint-cytology-in-the-preoperative-diagnosis-of-malignancy-in-low-resource-setting
#15
Amit Kumar Adhya, Ranjan Mohanty
BACKGROUND: Touch imprint cytology (TIC) is a very rapid, cheap, and easy method used for the rapid evaluation of intraoperative specimens and post mortem cases. This study aims to evaluate its utility in preoperative diagnosis of cancer. METHODS: A total of 476 cases of suspected malignancy of different sites and different histological subtypes were studied. TIC was obtained in all the biopsies and the cytological findings were correlated with the corresponding biopsy diagnosis to evaluate the diagnostic accuracy...
March 7, 2017: Diagnostic Cytopathology
https://www.readbyqxmd.com/read/28264670/examining-the-quality-of-childhood-tuberculosis-diagnosis-in-cambodia-a-cross-sectional-study
#16
Julia B Frieze, Rajendra-Prasad Yadav, Khann Sokhan, Song Ngak, Team Bak Khim
BACKGROUND: Cambodia is one of the 22 countries with the highest TB burden. While childhood TB is estimated to make up 10-20% of total TB cases in high-burden settings, this proportion ranges from 1.3 to 39.4% throughout Cambodia's provinces, suggesting potential under- and over-diagnosis of childhood TB, subnationally. The proportion of case notifications classified as extrapulmonary TB out of total TB case notifications in children is 87%, greatly exceeding the expected global range of 20-30%...
March 6, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28258591/point-of-care-ultrasound-use-accuracy-and-impact-on-clinical-decision-making-in-rwanda-hospitals
#17
Patricia C Henwood, David C Mackenzie, Andrew S Liteplo, Joshua S Rempell, Alice F Murray, Megan M Leo, Damas Dukundane, Anthony J Dean, Stephen Rulisa, Vicki E Noble
OBJECTIVES: Few studies of point-of-care ultrasound training and use in low resource settings have reported the impact of examinations on clinical management or the longer-term quality of trainee-performed studies. We characterized the long-term effect of a point-of-care ultrasound program on clinical decision making, and evaluated the quality of clinician-performed ultrasound studies. METHODS: We conducted point-of-care ultrasound training for physicians from Rwandan hospitals...
March 4, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28255915/microbiologic-methods-in-the-diagnostics-of-upper-respiratory-tract-pathogens
#18
J Kompanikova, A Zumdick, M Neuschlova, V Sadlonova, E Novakova
Upper respiratory tract infection (URI) is a nonspecific term used to describe acute infections involving the nose, paranasal sinuses, pharynx, and larynx above the vocal cords. The aim of this study was to provide a summary of the most common pathogens of URI and to compare advantages and disadvantages of traditional and new rapid microbiological tests used to identify them. Blood samples were simultaneously examined by the enzyme-linked immunosorbent assay (ELISA) and by the FilmArray Respiratory Panel for eight different pathogens in a total of 15 tests performed in nasopharyngeal swabs...
March 3, 2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28254087/automatic-diagnosis-of-strabismus-in-digital-videos-through-cover-test
#19
Thales Levi Azevedo Valente, João Dallyson Sousa de Almeida, Aristófanes Corrêa Silva, Jorge Antonio Meireles Teixeira, Marcelo Gattass
BACKGROUND AND OBJECTIVE: Medical image processing can contribute to the detection and diagnosis of human body anomalies, and it represents an important tool to assist in minimizing the degree of uncertainty of any diagnosis, while providing specialists with an additional source of diagnostic information. Strabismus is an anomaly that affects approximately 4% of the population. Strabismus modifies vision such that the eyes do not properly align, influencing binocular vision and depth perception...
March 2017: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/28249580/assessment-of-the-utility-of-a-symptom-based-algorithm-for-identifying-febrile-patients-for-malaria-diagnostic-testing-in-senegal
#20
Julie Thwing, Fatou Ba, Alou Diaby, Younouss Diedhiou, Assane Sylla, Guelaye Sall, Mame Birame Diouf, Alioune Badara Gueye, Seynabou Gaye, Medoune Ndiop, Moustapha Cisse, Daouda Ndiaye, Mady Ba
BACKGROUND: Malaria rapid diagnostic tests (RDTs) enable point-of-care testing to be nearly as sensitive and specific as reference microscopy. The Senegal National Malaria Control Programme introduced RDTs in 2007, along with a case management algorithm for uncomplicated febrile illness, in which the first step stipulates that if a febrile patient of any age has symptoms indicative of febrile illness other than malaria (e.g., cough or rash), they would not be tested for malaria, but treated for the apparent illness and receive an RDT for malaria only if they returned in 48 h without improvement...
March 1, 2017: Malaria Journal
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