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Heart rate is an independent predictor of all-cause mortality in individuals with type 2 diabetes: The diabetes heart study

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World Journal of Diabetes 2018年第1期9卷 33-39页

作者： Sameer Prasada Cameron Oswalt Phyllis yeboah Georgia Saylor Donald Bowden joseph yeboah Department of Medical School (Medical students) Wake Forest University Department of Internal Medicine Wake Forest Baptist Health Department of Heart and Vascular Center of Excellence Wake Forest Baptist Health Department of Biochemistry Genomics and Personalized Medicine Research Wake Forest University

AIM To assess the association of resting heart rate with allcause and cardiovascular disease(CVD) mortality in the Diabetes Heart Study(DHS).METHODS Out of a total of 1443 participants recruited into the DHS, 1315 participants with type 2 diabetes who were free of atrial fibrillation and supraventricular tachycardia during the baseline exam were included in this analysis. Heart rate was collected from baseline resting electrocardiogram and mortality(all-cause and CVD) was obtained from state and national death registry. Kaplan-Meier(K-M) and Cox proportional hazard analyses were used to assess the *** The mean age, body mass index(BMI) and systolic blood pressure(SBP) of the cohort were 61.4 ± 9.2 years, 32.0 ± 6.6 kg/m2, and 139.4 ± 19.4 mmHg respectively. Fiftysix percent were females, 85% were whites, 15% were blacks, 18% were smokers. The mean ± SD heart rate was 69.8(11.9) beats per minute(bpm). After a median follow-up time of 8.5 years(maximum follow-up time is 14.0 years), 258 participants were deceased. In K-M analysis, participants with heart rate above the median had a significantly higher event rate compared with those below the median(log-rank P = 0.0223). A one standard deviation increase in heart rate was associated with allcause mortality in unadjusted(hazard ratio 1.16, 95%CI: 1.03-1.31) and adjusted(hazard ratio 1.20, 95%CI: 1.05-1.37) models. Similar results were obtained with CVD mortality as the outcome of *** Heart rate is an independent predictor of all-cause mortality in this population with type 2 diabetes. In this study, a 1-SD increase in heart rate was associated with a 20% increase in risk suggesting that additional prognostic information may be gleaned from this ubiquitously collected vital sign.

关键词： Diabetes mellitus Mortality Resting heart rate Prevention

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Basic Tenets of Classification Algorithms K-Nearest-Neighbor, Support Vector Machine, Random Forest and Neural Network: A Review

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Journal of Data Analysis and Information Processing 2020年第4期8卷 341-357页

作者： Ernest yeboah Boateng joseph Otoo Daniel A. Abaye Department of Basic Sciences School of Basic and Biomedical Sciences University of Health and Allied Sciences Ho Ghana Department of Statistics and Actuarial Science University of Ghana Accra Ghana

In this paper, sixty-eight research articles published between 2000 and 2017 as well as textbooks which employed four classification algorithms: K-Nearest-Neighbor (KNN), Support Vector Machines (SVM), Random Forest (RF) and Neural Network (NN) as the main statistical tools were reviewed. The aim was to examine and compare these nonparametric classification methods on the following attributes: robustness to training data, sensitivity to changes, data fitting, stability, ability to handle large data sizes, sensitivity to noise, time invested in parameter tuning, and accuracy. The performances, strengths and shortcomings of each of the algorithms were examined, and finally, a conclusion was arrived at on which one has higher performance. It was evident from the literature reviewed that RF is too sensitive to small changes in the training dataset and is occasionally unstable and tends to overfit in the model. KNN is easy to implement and understand but has a major drawback of becoming significantly slow as the size of the data in use grows, while the ideal value of K for the KNN classifier is difficult to set. SVM and RF are insensitive to noise or overtraining, which shows their ability in dealing with unbalanced data. Larger input datasets will lengthen classification times for NN and KNN more than for SVM and RF. Among these nonparametric classification methods, NN has the potential to become a more widely used classification algorithm, but because of their time-consuming parameter tuning procedure, high level of complexity in computational processing, the numerous types of NN architectures to choose from and the high number of algorithms used for training, most researchers recommend SVM and RF as easier and wieldy used methods which repeatedly achieve results with high accuracies and are often faster to implement.

关键词： Classification Algorithms Non-Parametric K-Nearest-Neighbor Neural Networks Random Forest Support Vector Machines

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Correlates of Hepatitis B Virus Infection among Antenatal Clinic Attendees of Volta Regional Hospital, Ho, Volta Region, Ghana

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Open Journal of Applied Sciences 2019年第7期9卷 573-586页

作者： joseph Otoo Paschal Kofi Dah Ernest yeboah Boateng Daniel A. Abaye Department of Statistics and Actuarial Science University of Ghana Accra Ghana Supercare Specialist Hospital Ho Ghana School of Basic and Biomedical Sciences University of Health and Allied Sciences Ho Ghana

Hepatitis B virus (HBV) infection remains a global health problem. With about 380 million chronic carriers of the HBV virus, there are over two million global deaths annually. Ghana is among the high endemic countries in Africa, with HBV prevalence ranging from 4.8% to 12.3% in the general population, 10.8% to 12.7% in blood donors and about 10.6% in antenatal clinic (ANC) attendees. The main objectives of this study were to test how socioeconomic factors, risky behaviors, knowledge and awareness of HBV infection correlate with actual HBV status among antenatal clinic attendees and to determine the predictors of HBV testing among ANC attendees. The study employed random sampling technique to sample 500 pregnant women, at mothers’ clinic of Volta Regional Hospital, Ho, Ghana. A structured questionnaire was used to collect information on socio-demographic characteristics, Hepatitis B status, possible risk factors, awareness and knowledge levels of HBV infection. Cross tabulation and the chi-square (χ2) statistic were used to determine statistical independence or association of study variables. Kruskal-Wallis test was applied to test for the differences in HBV knowledge scores across HBV status and levels of HBV awareness;and the binomial regression model was used to determine the predictors of HBV testing among ANC attendees. It is evident that age, religion, ethnicity, educational level, blood transfusion, number of blood transfusions, gravidity, parity, awareness of HBV and monthly income were associated with HBV status. Results of the Binomial Logistic Regression model indicate that Age (p = 0.03), Education level (p = 0.04), Religion (p = 0.04), Ethnicity (p = 0.00) and Blood transfusion (p = 0.04) were significant (p 0.05) predictors of HBV testing. Knowledge of HBV status enables patients to seek early treatment, facilitates referral for social support and counseling. We recommend that the Ministry of Health should carry effective education on HBV and its preven

关键词： Binomial Logistic Regression Hepatitis B Virus Infection Antenatal Clinic Attendees

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Agrochemicals and the Ghanaian Environment, a Review

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Journal of Environmental Protection 2011年第3期2卷 221-230页

作者： joseph R. Fianko Augustine Donkor Samuel T. Lowor Philip O. yeboah 不详

Agrochemicals are generally recognized as a significant factor in enhancing the ability to meet Ghana’s need for sufficient, safe and affordable food and fiber, however, increased usage have led to environmental deterioration. In Ghana agriculture and public health sectors remain the major contributors of pollutants into the environment. This is a systematic review of studies done in Ghana to give an integrated picture of agrochemicals especially pesticides exposure to humans, animals, plants, water, soil/sediment and atmosphere in Ghana. Although the widespread usage of agrochemicals in Ghana has contributed immensely to increased food supply and improvement in public health, it has caused tremendous harm to the environment. Water bodies, fish, vegetables, food, soil and sediment have been found to be pesticide contaminated. There is considerable evidence that farmers have overused agrochemicals especially pesticides. It is evident from biological monitoring studies that farmers are at higher risk for acute and chronic health effects associated with pesticides due to occupational exposure. Furthermore the intensive use of pesticides involves a special risk of for field workers, consumers and unacceptable residue levels in exportable products may serve as barrier to international trade. This review will set the future course of action of different studies on agrochemical usage and pesticide exposure in Ghana.

关键词： Ghana Agrochemicals Environment Pollution Exposure

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Physiological Resilience of Bambara Groundnut (Vigna subterranea L. Verdc) Genotypes to Intermittent Periods of Drought Stress at Different Growth Stages

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Agricultural Sciences 2023年第11期14卷 1573-1592页

作者： Kennedy Agyeman Felix Frimpong Patricia Amankwaa-yeboah Isaac Osei-Bonsu Stephen yeboah Agbesi Keteku Paul Marno Mavis Brempong Brempong Eric Owusu Danquah Asamoah Emmanuel Adjei Michael Odenkey Quaye joseph Nketiah Berchie CSIR-Crops Research Institute Fumesua-Kumasi Ghana Departnent of Agricultural Science Education University of Education Winneba Ghana

Different genotypes of Bambara groundnut (Vigna subterranea L. Verdc) grow well under conducive environmental conditions, provided that adequate soil moisture is available during vegetative and reproductive phases. However, drought stress is the major limiting factor to bambara production, which accounts for up to 40% of yield losses. This situation could worsen due to drastic and rapid changes in the global climate. Landraces grown by farmers are low-yielding. Understanding the physiological response of different genotypes to drought stress is key to achieving food security through crop improvement and diversification. This study focused on variations in the response of Bambara groundnut genotypes to intermittent drought stress during the crop’s critical growth (vegetative and reproductive) stages. The experiment was undertaken at CSIR-Crops Research Institute Screen-house. The treatments were used in a factorial experiment with three replications in a randomized complete block design. The Bambara genotypes showed considerable variability in tolerance to drought stress. Drought stress during vegetative and reproductive stages significantly reduced crop growth indices, the leaf relative water content, chlorophyll content and leaf area. Drought stress during vegetative and reproductive stages had a more severe impact on the seed yield of genotype Nav Red, reducing it by 69% and 13%, respectively. Farmers should pay more attention to adopting drought-tolerant and high-yielding varieties for improved Bambara groundnut productivity and livelihoods.

关键词： Drought Stress Bambara Groundnut Genotypes Seed Yield

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Genetic diversity of hepatitis viruses in West-African countries from 1996 to 2018

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World Journal of Hepatology 2018年第11期10卷 807-821页

作者： Maléki Assih Abdoul Karim Ouattara Birama Diarra Albert Theophane Yonli Tegwindé Rebeca Compaore Dorcas Obiri-yeboah Florencia Wendkuuni Djigma Simplice Karou Jacques Simpore Bioche-mistry-Microbiology CERBA/LABIOGENEOuagadougou 02006Burkina Faso Laboratoryof Molecular Biology and Molecular Genetics(LABIOGENE)UFR/SVT University Ouaga I Prof Joseph KI-ZERBOOuaga-dougou 00226Burkina Faso Department of Microbiology and Immunology School of Medical SciencesUniversity of Cape CoastCape Coast 00233Ghana Ecole Supérieure des Techniques Biologiques et Alimentaires(ESTBA-UL) Universite de LomeLome 00229Togo

The severity of hepatic pathology and the response to treatment depend on the hepatitis virus genotype in the infected host. The objective of this review was to determine the distribution of hepatitis virus genotypes in West African countries. A systematic review of the literature in PubMed, Google Scholar and Science Direct was performed to identify 52 relevant articles reporting hepatitis A, B, C, D, E and G viruses *** B virus(HBV) genotype E with a prevalence of 90.6%(95%CI: 0.891-0.920) found in this review, is characterized by low genetic diversity. Hepatitis C virus(HCV) genotypes 1 and 2 represented 96.4% of HCV infections in West African countries, while hepatitis delta virus, hepatitis A virus, hepatitis G virus genotypes 1 and HEV genotype 3 were reported in some studies in Ghana and Nigeria. HBV genotype E is characterized by high prevalence, low genetic diversity and wide geographical distribution. Further studies on the clinical implications of HBV genotype E and HCV genotypes 1 and 2 are needed for the development of an effective treatment against this viral hepatitis in West African countries. Surveillance of the distribution of different genotypes is also needed to reduce recombination rates and prevent the emergence of more virulent viral strains.

关键词： Hepatitis virus Mutations Genotypes Recombination West African Economic and Monetary Union

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Genetic diversity and occult hepatitis B infection in Africa: A comprehensive review

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World Journal of Hepatology 2024年第5期16卷 843-859页

作者： Michee M Bazie Mahamoudou Sanou Florencia Wendkuuni Djigma Tegwinde Rebeca Compaore Dorcas Obiri-yeboah Benoît Kabamba Bolni Marius Nagalo Jacques Simpore Rasmata Ouédraogo Department of Medicine Transmissible Diseases LaboratoryUniversitéJoseph KI-ZERBOOuagadougou 0000Burkina Faso Department of Biochemistry and Microbiology Molecular Biology and Genetics LaboratoryUniversity Joseph KI-ZERBOOuagadougou 0000Burkina Faso Infectious and parasitic disease Laboratory Health Sciences Research InstituteIRSS/CNRSTNational Center for Scientific and Technological ResearchOuagadougou 0000Burkina Faso Department of Microbiology and Immunology School of Medical SciencesUniversity of Cape CoastPMBCape Coast 0000Ghana Department of Clinical Biology Virology LaboratoryCliniques Universitaires Saint LucUniversitéCatholique de LouvainBruxelles 0000Belgium Division of Hematology and Oncology Mayo ClinicAZ 0000United States

BACKGROUND Occult hepatitis B infection(OBI)is a globally prevalent infection,with its frequency being influenced by the prevalence of hepatitis B virus(HBV)infection in a particular geographic region,including *** can be transmitted th-rough blood transfusions and organ transplants and has been linked to the development of hepatocellular carcinoma(HCC).The associated HBV genotype influences the *** To highlight the genetic diversity and prevalence of OBI in *** This systematic review followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines and involved a comprehensive search on PubMed,Google Scholar,Science Direct,and African Journals Online for published studies on the prevalence and genetic diversity of OBI in *** The synthesis included 83 articles,revealing that the prevalence of OBI varied between countries and population groups,with the highest prevalence being 90.9%in patients with hepatitis C virus infection and 38%in blood donors,indicating an increased risk of HBV transmission through blood *** of OBI reactivation have been reported following *** D is the predominant,followed by genotypes A and *** This review highlights the prevalence of OBI in Africa,which varies across countries and population *** study also demonstrates that genotype D is the most prevalent.

关键词： Occult hepatitis B infection Blood transfusion Genetic diversity

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Detection of aac(3)IIc, aac(6)Ib, armA Genes Coding for Escherichia coli Resistance to Aminoglycosides in Burkina Faso

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Advances in Infectious Diseases 2023年第4期13卷 574-585页

作者： Pamane Djagbare Christelle Nadembega Tani Sagna Abdoul Karim Ouattara Emmanuel Sampo Théodora Zohoncon Moussa Ouedraogo Marius Belemgnegre Dorcas Obiri-yeboah Jacques Simpore Laboratory of Molecular Biology and Genetics LaBioGene Joseph KI-ZERBO University Ouagadougou Burkina Faso Institute for Research in Health Sciences/National Center for Scientific and Technological Research IRSS-CNRST Ouagadougou Burkina Faso Biomedical Laboratory of the Schiphra Hospital Ouagadougou Burkina Faso Biomedical Laboratory of Saint Camille Hospital HOSCO Ouagadougou Burkina Faso School of Medical Sciences Department of Microbiology and Immunology University of Cape Coast University Post Office Cape Coast Ghana

Background and Prupose: Antibiotic resistance is a major global health concern. In addition to the existing data on the prevalence of bacterial resistance to antibiotics, there are patchy data on bacterial resistance to aminoglycosides in Burkina Faso. In this study, we determined the prevalence of aminoglycoside resistance genes in E. coli, including aac(3)-IIc, aac(6)-Ib and armA in Ouagadougou, and determined which antibiotics in this class are most affected by resistance. Material and Methods: This study was conducted on 216 E. coli strains collected from the biomedical analysis laboratories of Saint Camille and Schiphra hospitals. E. coli strains were isolated from pus and urine samples collected between September 2018 and January 2019. Antibiotic susceptibility testing was performed using aminoglycosides, β-lactams, fluoroquinolones, and sulfonamides. Aminoglycoside resistance genes were detected in strains with at least one aminoglycoside resistance gene using conventional/multiplex PCR. Results: Aminoglycoside resistance was observed in 46.8% (101/216) of strains. The resistance rates were respectively 45.37% for Tobramycin, 32.40% for Gentamicin, 14.81% for Kanamycin, 2.31% for Netilmicin, 1.84% for Neomycin, and 0.46% for Amikacin. PCR showed that 86 strains (85.15%) possessed the aac(3)-IIc gene, 71 strains or 70.30%) possessed the aac(6’)-Ib gene, and nine strains (8.91%) possessed the armA gene. Conclusion: Aminoglycoside resistance in pathogenic E. coli strains is mainly due to the presence of the aac(3’)-IIc and aac(6’)-Ib genes. The presence of armA was first reported in Burkina Faso. Netilmicin, Neomycin and Amikacin are good therapeutic options for treating urinary tract and pus-forming infections.

关键词： E. coli Aminoglycoside Resistance acc(3’)-IIc aac(6’)-Ib armA Burkina Faso

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Geographical Distribution of Arboviruses, Aedes aegypti and Aedes albopictus Vectors and Their Resistance to Insecticides in Africa: A Systematic Review

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Advances in Entomology 2024年第4期12卷 249-274页

作者： Shoukrat Ohuwa Toyin Bello Abdou Azaque Zoure Abdoul Karim Ouattara Dogfounianalo Somda Christelle Nadembega Dorcas Obiri-yeboah Moussa Namountougou Abdoulaye Diabate Jacques Simpore Biomolecular Research Center Pietro Annigoni (CERBA) Ouagadougou Burkina Faso African Center of Excellence in Biotechnological Innovations for the Elimination of Vector-Borne Diseases (CEA/ITECH-MTV) Nazi BONI University Bobo-Dioulasso Burkina Faso Health Science Research Institute (IRSS/CNRST) Ouagadougou Burkina Faso Molecular Biology and Molecular Genetics Laboratory (LABIOGENE) UFR/SVT Joseph KI-ZERBO University Ouagadougou Burkina Faso Manga University Centre Norbert Zongo University Koudougou Burkina Faso Department of Microbiology and Immunology School of Medical Sciences University of Cape Coast Cape Coast Ghana Health Science Research Institute (IRSS/CNRST) Centre Muraz Bobo-Dioulasso Burkina Faso

Background & Objectives: Epidemics of arboviruses such as Dengue, Chikungunya and Zika have been recorded in recent years indicating that Aedes aegypti and Aedes albopictus are both important and very active vectors in Africa. For vector control, insecticides are on the front line, unfortunately, reported resistance jeopardizes the effectiveness of this strategy. The objective of this review was to determine the geographical distribution and insecticide resistance mechanisms of Ae. aegypti and Ae. Albopictus in Africa. Methods: A systematic review of the literature in scientific databases (PubMed, Google Scholar, ScienceDirect, Hinari) allowed us to identify relevant articles on the geographical distribution of Aedes aegypti, Aedes albopictus and arboviral diseases. On the other hand, studies related to insecticides used in vector control against Aedes, associated resistances and their molecular and metabolic mechanisms. Results: A total of 94 studies met the inclusion criteria for this search. Aedes aegypti is reported in most of Africa, and Aedes albopictus in part. There is a re-emergence and outbreak of Arbovirus epidemics in West and Central Africa. The insecticides used were organochlorines, carbamates, organophosphates and pyrethroids. In Aedes, target site insensitivity and metabolic resistance would be the 2 main mechanisms of resistance to these insecticides. Interpretation & Conclusion: Resistance has been recorded in all four major classes of insecticides recommended by WHO for vector control and eradication. New vector control methods such as the use of plant extracts with larvicidal and adulticidal activities, advanced modern biotechnology techniques, and nanobiotechnology need to be developed.

关键词： Aedes Arbovirus Insecticide Resistance Molecular and Metabolic Mechanisms Africa

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Gene therapy for Parkinson’s Disease and Ethical Challenges: A Systematic Review

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Advances in Parkinson's Disease 2023年第2期12卷 9-28页

作者： Théodora M. Zohoncon joseph Sawadogo Abdou Azaque Zoure Abdoul Karim Ouattara Marie N. L. Ouedraogo Luc Zongo Paul Ouedraogo Florencia W. Djigma Christelle W. M. Nadembèga Raphael Kabore Djénéba Ouermi Dorcas Obiri-yeboah Jacques Simpore Pietro Annigoni Biomolecular Research Centre (CERBA) Ouagadougou Burkina Faso Faculty of Medicine University Saint Thomas d’Aquin (USTA) Ouagadougou Burkina Faso Saint Camille Hospital Ouagadougou (HOSCO) Ouagadougou Burkina Faso Molecular Biology and Genetics Laboratory (LABIOGENE) Joseph KI-ZERBO University Ouagadougou Burkina Faso National Center for Scientific and Technological Research (CNRST/IRSS) Ouagadougou Burkina Faso Norbert Zongo University/Manga University Centre Koudougou Burkina Faso Department of Microbiology and Immunology School of Medical Sciences University of Cape Coast Cape Coast Ghana

Background: Parkinson’s disease (PD) is a complex, multifactorial neurodegenerative disorder with a pathophysiology deriving from the synergy of abnormal aggregation of neuroinflammation, synuclein and dysfunction of lysosomes, mitochondria and synaptic transport difficulties influenced by genetic and idiopathic factors. Worldwide, PD has a prevalence of 2-3% in people over the age of 65. To date, there is no certified, effective treatment for PD. Aim: The aims of this research were: (i) to present, on the basis of recent advances in molecular genetics and epigenetics, the genomic aspects and challenges of gene therapy trials for PD;(ii) to outline the ethical principles applicable to therapeutic trials for PD. Method: A systematic literature review was carried out to identify relevant articles reporting on genomic aspects and gene therapy in PD from 2001 to October 2023. The search was conducted in French and/or English in three databases: PubMed, Google Scholar and Science Direct. PRISMA guidelines were used in this systematic review. Results: A total of thirty-three publications were selected. An inductive thematic analysis revealed that numerous genetic mutations (SNCA, Parkin, PINK1, DJ-1, LRRK2, ATP13A2, VPS35, Parkin/PRKN, PINK1, DJ1/PARK7) and epigenetic events such as the action of certain miRNAs (miR-7, miR-153, miR-133b, miR-124, miR-137) are responsible for the onset of PD, and that genetic therapy for this pathology raises ethical questions that need to be elucidated in the light of the bioethical principles of autonomy, beneficence, non-maleficence and justice. Conclusion: There is no zero risk in biotechnology. Then, it will be necessary to assess all the potential risks of Parkinson disease’s gene therapy to make the right decision. It is therefore essential to pursue research and, with the guidance of ethics, to advance treatment options and meet the challenges of brain manipulation and its impact on human identity. The golden rule of medicine remai

关键词： Neurodegenerative Diseases Parkinson Disease Molecular Mechanism Gene Therapy Gene Therapy Ethics

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