Development of a polystyrene latex-based reagent for rheumatoid factor detection

2016 ◽  
Vol 36 (3) ◽  
pp. 239-243
Author(s):  
Grisel Marrero ◽  
Lilian P. Delgado ◽  
Humberto Caroll ◽  
Neise Ortiz ◽  
Alexis Musacchio ◽  
...  
Keyword(s):  
Rheumatoid Factor ◽  
Low Income ◽  
Low Cost ◽  
Total Surface Area ◽  
Polystyrene Latex ◽  
World Health ◽  
Human Sera ◽  
Reference Preparation ◽  
Health Organization ◽  
Blood Fraction

Abstract A rapid, specific and sensible polystyrene latex-based reagent has been developed to detect rheumatoid factor (RF) in human sera. Detection of RF is one of the criteria for rheumatoid arthritis (RA) diagnosis. RF includes immunoglobulins IgG, IgM or IgA targeting human-IgG Fc region, found in sera of 70–90% of patients with RA. Spherical, clean polystyrene particles of 480±80 nm with a Z-potential of -28 mV were synthesized. Purified gamma-globulin human blood fraction, used as IgG source, was adsorbed on particles in glycine-buffered saline with a fivefold excess of the immunoglobulins needed to saturate the calculated total surface area of the particles. The reagent was calibrated against the World Health Organization international serum reference preparation and tested with commercial positive and negative RF controls. Reactivity of the developed diagnostic reagent with human sera, either positive or negative for RF, was evaluated. The sera were tested both intact and following complement inactivation. When complement-inactivated sera were used, our reagent showed 100% coincidence of results with a commercial diagnostic kit of specificity of 80% and sensibility of 93%. The in-house reagent developed in the present work is easy to prepare and at relatively low cost, making it ideal for RF detection in low-income settings.

scholarly journals Adaptation and validation for Colombia of the WHO safe childbirth checklist

2018 ◽  
Vol 49 (3) ◽  
pp. 201-212
Author(s):  
Ana Carolina Amaya Arias ◽  
Óscar Zuluaga ◽  
Douglas Idárraga ◽  
Javier Hernando Eslava Schmalbach
Keyword(s):  
Low Income ◽  
Health Workers ◽  
Low Cost ◽  
Neonatal Morbidity ◽  
Neonatal Care ◽  
World Health ◽  
Low Income Countries ◽  
Safe Childbirth Checklist ◽  
Health Organization ◽  
Safe Childbirth

Introduction: Most maternal deaths that occur in developing countries are considered unfair and can be avoided. In 2008, The World Health Organization (WHO) proposed a checklist for childbirth care, in order to assess whether a simple, low-cost intervention had an impact on maternal and neonatal mortality in low-income countries. Objective: To translate, adapt and validate the content of the WHO Safe Childbirth Checklist (SCC) for its use in Colombia Methods: The checklist was translated and adapted to the Colombian context. It was subsequently validated by a panel of experts composed of 17 health workers with experience in maternal and neonatal care and safety. Reliability among judges was estimated (Rwg) and items were modified or added to each section of the list according to the results. Results: Modifications were made to 28 items, while 19 new items were added, and none was removed. The most important modifications were made to the management guidelines included in each item, and the items added refer to risks inherent to our environment. Conclusion: The Colombian version of the SCC will be a useful tool to improve maternal and neonatal care and thereby contribute to reducing maternal and neonatal morbidity and mortality in our country.

Development of improved low-cost ceramic water filters for viral removal in the Haitian context

2014 ◽  
Vol 5 (1) ◽  
pp. 28-38 ◽  
Author(s):  
L. Guerrero-Latorre ◽  
M. Rusiñol ◽  
A. Hundesa ◽  
M. Garcia-Valles ◽  
S. Martinez ◽  
...  
Keyword(s):  
Low Income ◽  
Low Cost ◽  
World Health ◽  
Low Income Countries ◽  
Virus Removal ◽  
Ceramic Water Filters ◽  
Removal Efficiencies ◽  
Reductive Atmosphere ◽  
Health Organization ◽  
Water Filters

Household-based water treatment (HWT) is increasingly being promoted to improve water quality and, therefore, health status in low-income countries. Ceramic water filters (CWFs) are used in many regions as sustainable HWT and have been proven to meet World Health Organization (WHO) microbiological performance targets for bacterial removal (2–4 log); however, the described viral removal efficiencies are insufficient to significantly reduce the associated risk of viral infection. With the objective of improving the viral removal efficiencies of ceramic water filters, new prototypes with different oxide compositions and firing atmospheres have been developed and evaluated. For removal efficiencies human adenoviruses, MS2 bacteriophage and Escherichia coli were quantified in all prototypes. A new model of CWF that was fired in a reductive atmosphere presented virus and bacteria removal efficiencies greater than 3.0 log and 2.5 log, respectively, which would fulfill the viral targets that are recommended by the WHO. Ceramic characterization of the selected filters, which were fired in a reductive atmosphere, showed that a larger specific surface area than those of control filters and higher fraction of a positive Z-potential fraction are the most likely explanations for this increase in virus removal.

scholarly journals Vitamin C and COVID-19: should clinical trials be prioritised for low income settings and vitamin C-deficient populations?

2021 ◽  
Vol 23 (1) ◽  
pp. 119-120
Author(s):  
Anitra C Carr ◽  
◽  
Sam Rowe ◽  
◽  
Keyword(s):  
Vitamin C ◽  
Low Income ◽  
Low Cost ◽  
World Health ◽  
Biological Plausibility ◽  
Resource Limited Settings ◽  
Resource Limited ◽  
The World ◽  
Adjunctive Intervention ◽  
Health Organization

TO THE EDITOR: Managing coronavirus disease 2019 (COVID-19) in resource-limited settings requires a number of considerations, including reducing or preventing requirements for respiratory support.1 Vitamin C is a low cost, readily available therapy that the World Health Organization has highlighted for further research as an adjunctive intervention with biological plausibility for improving the clinical outcome of patients with COVID-19

scholarly journals IoT and Deep Learning Based Approach for Rapid Screening and Face Mask Detection for Infection Spread Control of COVID-19

2021 ◽  
Vol 11 (8) ◽  
pp. 3495
Author(s):  
Shabir Hussain ◽  
Yang Yu ◽  
Muhammad Ayoub ◽  
Akmal Khan ◽  
Rukhshanda Rehman ◽  
...  
Keyword(s):  
Deep Learning ◽  
Low Cost ◽  
Face Mask ◽  
World Health ◽  
Rapid Screening ◽  
Screening System ◽  
Source Of Infection ◽  
The Face ◽  
Health Organization ◽  
Vaccine Distribution

The spread of COVID-19 has been taken on pandemic magnitudes and has already spread over 200 countries in a few months. In this time of emergency of COVID-19, especially when there is still a need to follow the precautions and developed vaccines are not available to all the developing countries in the first phase of vaccine distribution, the virus is spreading rapidly through direct and indirect contacts. The World Health Organization (WHO) provides the standard recommendations on preventing the spread of COVID-19 and the importance of face masks for protection from the virus. The excessive use of manual disinfection systems has also become a source of infection. That is why this research aims to design and develop a low-cost, rapid, scalable, and effective virus spread control and screening system to minimize the chances and risk of spread of COVID-19. We proposed an IoT-based Smart Screening and Disinfection Walkthrough Gate (SSDWG) for all public places entrance. The SSDWG is designed to do rapid screening, including temperature measuring using a contact-free sensor and storing the record of the suspected individual for further control and monitoring. Our proposed IoT-based screening system also implemented real-time deep learning models for face mask detection and classification. This module classified individuals who wear the face mask properly, improperly, and without a face mask using VGG-16, MobileNetV2, Inception v3, ResNet-50, and CNN using a transfer learning approach. We achieved the highest accuracy of 99.81% while using VGG-16 and the second highest accuracy of 99.6% using MobileNetV2 in the mask detection and classification module. We also implemented classification to classify the types of face masks worn by the individuals, either N-95 or surgical masks. We also compared the results of our proposed system with state-of-the-art methods, and we highly suggested that our system could be used to prevent the spread of local transmission and reduce the chances of human carriers of COVID-19.

scholarly journals Design and Development of an Instrument on Knowledge of Food Safety, Practices, and Risk Perception Addressed to Children and Adolescents from Low-Income Families

2021 ◽  
Vol 13 (4) ◽  
pp. 2324
Author(s):  
Sueny Andrade Batista ◽  
Elke Stedefeldt ◽  
Eduardo Yoshio Nakano ◽  
Mariana de Oliveira Cortes ◽  
Raquel Braz Assunção Botelho ◽  
...  
Keyword(s):  
Food Safety ◽  
Risk Perception ◽  
Low Income ◽  
Raw Materials ◽  
World Health ◽  
Low Income Students ◽  
Level Of Knowledge ◽  
Low Income Families ◽  
Health Organization ◽  
Rules Set

In the fight against foodborne diseases, expanding access to information for different groups is needed. In this aspect, it is crucial to evaluate the target audience’s particularities. This study constructed and validated an instrument containing three questionnaires to identify the level of knowledge, practices, and risk perception of food safety by low-income students between 11 and 14 years old. The following steps were used: systematic search of the databases; conducting and analyzing focus groups; questionnaires development; and questionnaires analysis. After two judges’ rounds, the final version was reached with 11 knowledge items, 11 practice items, and five risk perception items. The content validation index values were higher than 0.80. The adopted methodology considered the students’ understanding and perceptions, as well the appropriate language to be used. Besides, it allowed the development of questionnaires that directly and straightforwardly covers the rules set by the World Health Organization for foodborne disease control called Five Keys to Safer Food (keep clean; separate raw and cooked; cook thoroughly; keep food at safe temperatures; and use safe water and raw materials). Its use can result in a diagnosis for elaborating educational proposals and other actions against foodborne illness in the most vulnerable population.

scholarly journals Training physicians in India to interpret pediatric chest radiographs according to World Health Organization research methodology

2021 ◽  
Author(s):  
Eric D. McCollum ◽  
Melissa M. Higdon ◽  
Nicholas S. S. Fancourt ◽  
Jack Sternal ◽  
William Checkley ◽  
...  
Keyword(s):  
World Health Organization ◽  
Primary Endpoint ◽  
Low Income ◽  
Chest Radiography ◽  
Epidemiological Studies ◽  
Chest Radiographs ◽  
World Health ◽  
Average Score ◽  
Pediatric Chest ◽  
Health Organization

Abstract Background Chest radiography is the standard for diagnosing pediatric lower respiratory infections in low-income and middle-income countries. A method for interpreting pediatric chest radiographs for research endpoints was recently updated by the World Health Organization (WHO) Chest Radiography in Epidemiological Studies project. Research in India required training local physicians to interpret chest radiographs following the WHO method. Objective To describe the methodology for training Indian physicians and evaluate the training’s effectiveness. Materials and methods Twenty-nine physicians (15 radiologists and 14 pediatricians) from India were trained by two WHO Chest Radiography in Epidemiological Studies members over 3 days in May 2019. Training materials were adapted from WHO Chest Radiography in Epidemiological Studies resources. Participants followed WHO methodology to interpret 60 unique chest radiographs before and after the training. Participants needed to correctly classify ≥80% of radiographs for primary endpoint pneumonia on the post-training test to be certified to interpret research images. We analyzed participant performance on both examinations. Results Twenty-six of 29 participants (89.7%) completed both examinations. The average score increased by 9.6% (95% confidence interval [CI] 5.0–14.1%) between examinations (P<0.001). Participants correctly classifying ≥80% of images for primary endpoint pneumonia increased from 69.2% (18/26) on the pretraining to 92.3% (24/26) on the post-training examination (P=0.003). The mean scores of radiologists and pediatricians on the post-training examination were not statistically different (P=0.43). Conclusion Our results demonstrate this training approach using revised WHO definitions and tools was successful, and that non-radiologists can learn to apply these methods as effectively as radiologists. Such capacity strengthening is important for enabling research to support national policy decision-making in these settings. We recommend future research incorporating WHO chest radiograph methodology to consider modelling trainings after this approach.

scholarly journals Examination of WHO/INRUD Core Drug Use Indicators at Public Primary Healthcare Centers in Kisii County, Kenya

2020 ◽  
Author(s):  
Faith A. Okalebo ◽  
Eric M. Guantai ◽  
Aggrey O. Nyabuti
Keyword(s):  
Drug Use ◽  
Low Income ◽  
Primary Healthcare ◽  
Essential Medicines ◽  
World Health ◽  
Low Income Countries ◽  
Rational Use ◽  
Health Organization ◽  
Consultation Time ◽  
Primary Healthcare Centers

ABSTRACTBackgroundIrrational drug use is a global problem. However, the extent of the problem is higher in low-income countries. This study set out to assess and characterize drug use at the public primary healthcare centers (PPHCCs) in a rural county in Kenya, using the World Health Organization/ International Network for the Rational Use of Drugs (WHO/INRUD) core drug use indicators methodology.MethodsTen PPHCCs were randomly selected. From each PPHCC, ninety prescriptions from October to December 2018 were sampled and data extracted. Three-hundred (30 per PPHCC) patients and ten (1 per PPHCC) dispensers were also observed and interviewed. The WHO/INRUD core drug use indicators were used to assess the patterns of drug use.ResultsThe average number of drugs per prescription was 2.9 (SD 0.5) (recommended: 1.6– 1.8), percentage of drugs prescribed by generic names was 27.7% (recommended: 100%); the percentage of prescriptions with an antibiotic was 84.8% (recommended: 20.0–26.8%), and with an injection prescribed was 24.9% (recommended: 13.4–24.1%). The percentage of prescribed drugs from the Kenya Essential Medicines List was 96.7% (recommended: 100%). The average consultation time was 4.1 min (SD 1.7) (recommended: ≥10 min), the average dispensing time was 131.5 sec (SD 41.5) (recommended: ≥90 sec), the percentage of drugs actually dispensed was 76.3% (recommended: 100%), the percentage of drugs adequately labeled was 22.6% (recommended: 100%) and percentage of patients with correct knowledge of dispensed drugs was 54.7% (recommended: 100%). Only 20% of the PPHCCs had a copy of KEML available, and 80% of the selected essential drugs assessed were available.ConclusionThe survey shows irrational drug use practices, particularly polypharmacy, non-generic prescribing, overuse of antibiotics, short consultation time and inadequacy of drug labeling. Effective programs and activities promoting the rational use of drugs are the key interventions suggested at all the health facilities.

scholarly journals Attitude and Behaviour For Preventing COVID-19 Disease Infections in Mali: An Analysis Based On COVID-19 Panel Phone Survey

2021 ◽  
Author(s):  
Wilfried GUETS ◽  
Deepak Kumar Behera
Keyword(s):  
World Bank ◽  
Low Income ◽  
World Health ◽  
Multivariate Logistic Regression Model ◽  
The World Bank ◽  
Poor Households ◽  
Phone Survey ◽  
The World ◽  
Health Organization ◽  
National Statistical Office

Abstract Background COVID-19 outbreak has been declared as an emerging and conflict situation by the World Health Organization (WHO) due to the multiple nature of infection through international spread that poses a serious threat to populations’ health and socio-economic conditions household in general. Objective This study aims to analyse the behaviour adopted by households’ heads for preventing COVID-19 infection in Mali. Methods We collected data from the COVID-19 Panel Households survey collected in Mali by the National Statistical Office, Institut National de la Statistique (INSTAT), in collaboration with the World Bank in October 2020. We used a multivariate logistic regression model. Results A total of 1,514 households heads were included. The age between 20 and 90 years old. The poor households represented 27%. Being a household with a low-income reduced the probability of using masks (p < 0.1). Being poor increased the probability to agree with vaccination (p < 0.01). The health services utilisation increased the probability of wear masks (p < 0.01), getting tested (p < 0.01), and agree with the vaccine (p < 0.01). People with a high occupation volume were more likely to wear protective masks (p < 0.1). Conclusion Behaviour and attitude prevention varied according to households characteristics. Local government and policymakers should continue to provide more economic, medical and social assistance to protect the population, which would reduce the spread of the disease, particularly to households living in vulnerable regions of the country most affected by conflict and food insecurity.

INTERNATIONAL DEVELOPMENT ISSUES

PEDIATRICS ◽  
1982 ◽  
Vol 70 (3) ◽  
pp. 395-395
Author(s):  
Keyword(s):  
International Development ◽  
Low Income ◽  
Development Aid ◽  
Military Expenditure ◽  
World Health ◽  
Low Income Countries ◽  
River Blindness ◽  
Eradication Programme ◽  
Set Up ◽  
Health Organization

The annual military bill is now approaching 450 billion US dollars, while official development aid accounts for less than 5 per cent of this figure. Four examples: 1. The military expenditure of only half a day would suffice to finance the whole malaria eradication programme of the World Health Organization, and less would be needed to conquer river-blindness, which is still the scourge of millions. 2. A modern tank costs about one million dollars; that amount could improve storage facilities for 100,000 tons of rice and thus save 4000 tons or more annually; one person can live on just over a pound of rice a day. The same sum of money could provide 1000 classrooms for 30,000 children. 3. For the price of one jet fighter (20 million dollars) one could set up about 40,000 village pharmacies. 4. One-half of one per cent of one year's world military expenditure would pay for all the farm equipment needed to increase food production and approach self-sufficiency in food-deficit low-income countries by 1990.

International Collaborative Study for the Calibration of a Proposed Reference Preparation for Thromboplastin, Human Recombinant, Plain

1998 ◽  
Vol 79 (02) ◽  
pp. 439-443 ◽  
Author(s):  
Veena Chantarangkul ◽  
Barbara Negri ◽  
Marigrazia Clerici ◽  
Pier Mannuccio Mannucci ◽  
Armando Tripodi
Keyword(s):  
Collaborative Study ◽  
Mean Value ◽  
World Health ◽  
Practical Reasons ◽  
Calibration Model ◽  
Average Value ◽  
Reference Preparation ◽  
International Collaborative ◽  
Health Organization ◽  
International Collaborative Study

SummaryStocks of the International Reference Preparation (IRP) for thromboplastin, human, plain, coded BCT/253 and held by the World Health Organization (WHO) are nearly exhausted and must be replaced. For practical reasons the choice of the replacement candidate was restricted to two available human recombinant preparations which were coded as X/95 and Y/95 and calibrated in an international collaborative study involving 19 laboratories from Europe, Australia, Canada and Argentina. To minimize the differences between routes of calibration, the two candidates were calibrated against the existing WHO-IRP from human, rabbit and bovine origin and the final ISI was the resultant average value. On the basis of predefined criteria (i.e., within- and between-laboratory precision of the calibration and the conformity to the calibration model), X/95 was the preferred candidate. The assigned ISI (SE of the mean) value is 0.940 (0.0060) and the interlaboratory coefficient of variation 4.7%.

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