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Atimbire SA, Appati JK, Owusu E. Empirical exploration of whale optimisation algorithm for heart disease prediction. Sci Rep 2024; 14:4530. [PMID: 38402276 PMCID: PMC10894250 DOI: 10.1038/s41598-024-54990-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 02/19/2024] [Indexed: 02/26/2024] Open
Abstract
Heart Diseases have the highest mortality worldwide, necessitating precise predictive models for early risk assessment. Much existing research has focused on improving model accuracy with single datasets, often neglecting the need for comprehensive evaluation metrics and utilization of different datasets in the same domain (heart disease). This research introduces a heart disease risk prediction approach by harnessing the whale optimization algorithm (WOA) for feature selection and implementing a comprehensive evaluation framework. The study leverages five distinct datasets, including the combined dataset comprising the Cleveland, Long Beach VA, Switzerland, and Hungarian heart disease datasets. The others are the Z-AlizadehSani, Framingham, South African, and Cleveland heart datasets. The WOA-guided feature selection identifies optimal features, subsequently integrated into ten classification models. Comprehensive model evaluation reveals significant improvements across critical performance metrics, including accuracy, precision, recall, F1 score, and the area under the receiver operating characteristic curve. These enhancements consistently outperform state-of-the-art methods using the same dataset, validating the effectiveness of our methodology. The comprehensive evaluation framework provides a robust assessment of the model's adaptability, underscoring the WOA's effectiveness in identifying optimal features in multiple datasets in the same domain.
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Affiliation(s)
| | | | - Ebenezer Owusu
- Department of Computer Science, University of Ghana, Accra, Ghana
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Kwaku Akowuah P, Junior Obinwanne C, Owusu E, Kyeremeh S, Bonsu K, Karikari LAA, Akyaa Akomeah F, Kyei Nkansah E, Kobia-Acquah E. Platelet-rich plasma for treating dry eye disease - A systematic review and meta-analysis. Cont Lens Anterior Eye 2024; 47:102091. [PMID: 37951738 DOI: 10.1016/j.clae.2023.102091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Revised: 10/20/2023] [Accepted: 11/04/2023] [Indexed: 11/14/2023]
Abstract
PURPOSE Dry eye disease has public health and economic significance. Platelet-rich plasma is rich in anti-inflammatory agents and growth factors, both beneficial for ocular surface repair. This study aimed to conduct a systematic review and meta-analysis to summarize the benefits of platelet-rich plasma for treating dry eye disease and its adverse effects. METHODS Prospective comparative studies using platelet-rich plasma as monotherapy for dry eye disease were included for efficacy assessment. Before-after studies were included for adverse events assessment. Data sources included PubMed, Google Scholar, Web of Science, and Scopus. A systematic review and meta-analysis protocol was pre-registered on PROSPERO (CRD42022347982). PRISMA guidelines were followed. The National Health Institute (NIH) quality assessment tool for before-after studies, the Cochrane risk of bias tool (RoB2), and the methodological index for non-randomized studies were used to assess the risk of bias. Heterogeneity was assessed using the I2 statistic. RESULTS 19 studies (10 comparative and 9 before-after) were included in the systematic review and meta-analysis. The occurrence rate of adverse effects was 2.6 % (95 % CI: 0.5 - 4.7). The pooled standardized mean difference (SMD) for dry eye symptoms was 0.81 (95 % CI: 0.25 - 1.37; I2 = 82 %; p < 0.00001; Z = 2.84, p = 0.004); tear quality was 0.44 (95 % CI: 0.06 - 0.81; I2 = 67 %; p = 0.003; Z = 2.26, p = 0.02); tear quantity was 0.45 (95 % CI: 0.03 - 0.88; I2 = 74 %; p = 0.0003; Z = 2.10, p = 0.04); and corneal staining 0.72 (95 % CI: 0.14 - 1.30; I2 = 85 %; p < 0.00001; Z = 2.43, p = 0.02). CONCLUSION The current study shows that platelet-rich plasma is efficacious in managing dry eye disease, significantly reducing dry eye signs and symptoms. Such significant improvements could translate to improved quality of life.
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Affiliation(s)
| | | | - Ebenezer Owusu
- College of Optometry, University of Houston, Houston, TX, USA.
| | - Sylvester Kyeremeh
- Department of Optometry and Visual Science, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Kwaku Bonsu
- College of Optometry, University of Houston, Houston, TX, USA.
| | | | - Felicia Akyaa Akomeah
- Department of Optometry and Visual Science, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Ernest Kyei Nkansah
- Centre for Eye Research Ireland, Environmental Sustainability and Health Institute, Technological University Dublin, Dublin, Ireland
| | - Emmanuel Kobia-Acquah
- Department of Optometry and Visual Science, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana; Centre for Eye Research Ireland, Environmental Sustainability and Health Institute, Technological University Dublin, Dublin, Ireland.
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Owusu E, Blankson ER, Awunyo RG, Adams Y, Oduro V, Kpakpo BS, Gbogbo F. Trace metal load of two urban wetlands with varied catchment activities in Ghana. Environ Monit Assess 2023; 195:1140. [PMID: 37665409 DOI: 10.1007/s10661-023-11684-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Accepted: 08/07/2023] [Indexed: 09/05/2023]
Abstract
This study compared Lead (Pb), Chromium (Cr), Copper (Cu), Zinc (Zn), Mercury (Hg), Arsenic (As) and Cadmium (Cd) concentrations in sediment, water, and biota at Vaughan Dam which receives limited sewage effluent discharge from residential areas, and Korle Lagoon which receives industrial effluents, electronic waste, garages-spill oil and a host of others in addition to residential sewage effluent discharge. Samples were analyzed with Atomic Absorption Spectrometer. The results showed that concentrations of trace metals were generally higher in the sediment, water, and plants from the Korle Lagoon but only Cu in the sediment of Korle Lagoon showed a significantly high concentration. The similarities in the rank orders of the metal concentrations together with the dominance of Zn and Pb in most compartments of the wetlands indicated major differences did not exist in the contaminant input to the two wetlands except electronic waste recycling and disposal that resulted in significantly high copper concentrations in the sediment of Korle Lagoon. No evidence of biomagnification was determined along the food chains of the Vaughan Dam and the Korle Lagoon for all the metals studied.The Tilapia zilli from Vaughan Dam, the only biota that is regularly consumed from the wetlands, had Cr, Cu, Pb, Cd, Hg, and As concentrations above FAO/WHO permissible limits and therefore pose a health risk to consumers.
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Affiliation(s)
- Ebenezer Owusu
- Department of Plant and Environmental Biology, University of Ghana, P.O. Box LG 55. Legon, Accra, Ghana
| | - Emmanuel Robert Blankson
- Department of Animal Biology and Conservation Science, University of Ghana, P.O. Box LG 67. Legon, Accra, Ghana
| | - Regina Gyesiwaah Awunyo
- Department of Animal Biology and Conservation Science, University of Ghana, P.O. Box LG 67. Legon, Accra, Ghana
| | - Yassin Adams
- Department of Animal Biology and Conservation Science, University of Ghana, P.O. Box LG 67. Legon, Accra, Ghana
| | - Vera Oduro
- Department of Animal Biology and Conservation Science, University of Ghana, P.O. Box LG 67. Legon, Accra, Ghana
| | - Brown Shadrack Kpakpo
- Department of Animal Biology and Conservation Science, University of Ghana, P.O. Box LG 67. Legon, Accra, Ghana
| | - Francis Gbogbo
- Department of Animal Biology and Conservation Science, University of Ghana, P.O. Box LG 67. Legon, Accra, Ghana.
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Owusu E, Quainoo R, Mensah S, Appati JK. A Deep Learning Approach for Loan Default Prediction Using Imbalanced Dataset. International Journal of Intelligent Information Technologies 2023. [DOI: 10.4018/ijiit.318672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Abstract
Lending institutions face key challenges in making accurate predictions of loan defaults. Large sums of money given as loans are defaulted and this causes a substantial loss in business. This study addresses loan default in online peer-to-peer lending activities. Data for the study was obtained from the online lending club on the Kaggle platform. The loan status was chosen as the dependent variable and was classified discretely into “default” and “fully paid” loans. The dataset is preprocessed to eliminate all irrelevant instances. Due to the imbalanced nature of the dataset, the adaptive synthetic (ADASYN) oversampling algorithm is used to balance the data by oversampling the minority class with synthetic data instances. Deep neural network (DNN) is used for prediction. A prediction accuracy of 94.1% is realized and this emerged as the highest score from several trials with variations in batch sizes and epochs. The result of the study clearly shows that the proposed procedure is very promising.
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Akowuah PK, Owusu E, Senanu EN, Adjei-Anang J. Association between Dyslipidemia and Meibomian Gland Dysfunction: A Systematic Review and Meta-Analysis. Optom Vis Sci 2023; 100:211-217. [PMID: 36722777 DOI: 10.1097/opx.0000000000001994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
PURPOSE This study aimed to use meta-analysis to estimate the association between dyslipidemia and meibomian gland dysfunction. METHODS The following databases were searched: PubMed, Google Scholar, and Scopus. Case-control and cohort studies assessing the association between dyslipidemia and meibomian gland dysfunction were included. The association was assessed using odds ratios. Heterogeneity between studies was assessed with the χ2 statistic and degree of inconsistency. The quality of studies was assessed using the Newcastle-Ottawa Scale. The systematic review was registered on PROSPERO (ID: CRD42022347982). RESULTS The systematic review included three case-control and two cohort studies. The odds of hypercholesterolemia and hypertriglyceridemia in meibomian gland dysfunction were 5.45 (95% confidence interval [CI], 1.65 to 17.95) and 3.28 (95% CI, 1.25 to 8.62), respectively. The odds of elevated serum low-density lipoprotein and reduced high-density lipoprotein in meibomian gland dysfunction were 2.72 (95% CI, 1.24 to 5.98) and 1.15 (95% CI, 0.74 to 1.79), respectively. The current study's limitation is that the effects of sex, age, and meibomian gland dysfunction severity on the association between dyslipidemia and meibomian gland dysfunction were not assessed. CONCLUSIONS The current study suggests a significant association between dyslipidemia and meibomian gland dysfunction. This finding suggests that meibomian gland dysfunction diagnosis may call for dyslipidemia screening.
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Affiliation(s)
| | - Ebenezer Owusu
- College of Optometry, University of Houston, Houston, Texas
| | | | - Joseph Adjei-Anang
- Department of Optometry and Visual Science, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
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Baidoo CYM, Yaokumah W, Owusu E. Estimating Overhead Performance of Supervised Machine Learning Algorithms for Intrusion Detection. International Journal of Information Technologies and Systems Approach 2023. [DOI: 10.4018/ijitsa.316889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Estimating the energy and memory consumption of machine learning(ML) models for intrusion detection ensures efficient allocation of system resources. This study investigates the impact of supervised ML algorithms on the energy and memory consumption of intrusion detection systems. Experiments are conducted with seven ML algorithms and a proposed ensemble model, utilizing two intrusion detection datasets. Pearson correlation coefficient(PCC) and Spearman correlation coefficient are employed for the selection of optimum features. Regarding energy consumption, the findings reveal that the PCC with the UNSW-NB15 dataset uses the least amount of DRAM and CPU power. For ML methods, SVM utilizes the highest energy for both feature selection methods and datasets. Concerning memory consumption, the results show that decision tree uses the most current memory with PCC on the UNSW-NB15. The proposed ensemble model demonstrates the highest performance. These findings offer practical guidelines to ML experts when choosing the optimum model with the most efficient utilization of energy and memory.
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Akrong GB, Shao Y, Owusu E. Evaluation of the quality constructs of a tax management system based on DeLone and McLean IS success model. Africa Journal of Management 2022. [DOI: 10.1080/23322373.2022.2155116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Godwin Banafo Akrong
- School of Management and Economics (UESTC), University of Electronic Science and Technology, Chengdu, People’s Republic of China
| | - Yunfei Shao
- School of Management and Economics (UESTC), University of Electronic Science and Technology, Chengdu, People’s Republic of China
| | - Ebenezer Owusu
- Department of Computer Science, University of Ghana, Accra, Ghana
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Akowuah PK, Adade S, Nartey A, Owusu E, Donkor R, Ankamah-Lomotey S, Frimpong AA, Adjei-Anang J, Kobia-Acquah E. Strabismus and amblyopia in Africa - a systematic review and meta-analysis. Strabismus 2022; 31:31-44. [PMID: 36576233 DOI: 10.1080/09273972.2022.2157023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The objective of this review was to estimate the prevalence of strabismus and amblyopia in Africa. A systematic online literature search was conducted for articles on strabismus and amblyopia in Africa. Meta-analysis was performed, using the Freeman-Tukey double arcsine transformation, to estimate the prevalence of strabismus and amblyopia in Africa. Subgroup analyses were conducted according to age, gender, study year, and type of amblyopia. Meta-regression was used to evaluate the influence of predetermined factors on the prevalence of amblyopia. 8 (1 population-based & 7 school-based) and 21 (3 population-based & 18 school-based) studies on strabismus and amblyopia with sample sizes of 22,355 and 46,841, respectively, were included in the review. Overall prevalence of strabismus in Africa was estimated to be 0.8% (95% CI: 0.4% - 1.4%); exotropia was 0.2% (95% CI: 0.1% - 0.5%) and esotropia was 0.5% (95% CI: 0.1% - 1.2%). Overall prevalence of amblyopia was estimated to be 0.6% (95% CI: 0.3% - 0.9%); refractive and strabismic amblyopia were 1.1% (95% CI: 0.2% - 2.5%) and 0.4% (95% CI: 0.2% - 0.6%), respectively. Prevalence estimate of amblyopia in males was 1.8% (95% CI: 0.7% - 3.3%) and in females was 1.3% (95% CI: 0.4% - 2.6%). There was a significant association between the prevalence of amblyopia and the type of amblyopia (p = .007) and the study year (p = .006). Although there appears to be a relatively low prevalence of strabismus and amblyopia in Africa, there is a dearth of well-designed population-based studies on strabismus and amblyopia in Africa, resulting in the lack of epidemiological information on strabismus and amblyopia within the general African population. Information about the prevalence of strabismus and amblyopia across Africa can inform policy making and design and implementation of public health intervention program.
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Affiliation(s)
- Prince Kwaku Akowuah
- College of Optometry, University of Houston, Houston, TX, USA.,Department of Optometry and Visual Science, Kwame Nkrumah University of Science and Technology
| | - Samuel Adade
- College of Optometry, University of Houston, Houston, TX, USA
| | - Andrews Nartey
- College of Optometry, University of Houston, Houston, TX, USA
| | - Ebenezer Owusu
- College of Optometry, University of Houston, Houston, TX, USA
| | - Richard Donkor
- School of Optometry and Vision Science, University of Waterloo, Waterloo, ON, Canada
| | - Stephen Ankamah-Lomotey
- Department of Optometry and Visual Science, Kwame Nkrumah University of Science and Technology
| | - Asafo Agyei Frimpong
- Department of Optometry and Visual Science, Kwame Nkrumah University of Science and Technology
| | - Joseph Adjei-Anang
- Department of Optometry and Visual Science, Kwame Nkrumah University of Science and Technology
| | - Emmanuel Kobia-Acquah
- Department of Optometry and Visual Science, Kwame Nkrumah University of Science and Technology.,Centre for Eye Research Ireland, School of Physics, Clinical and Optometric Sciences, College of Sciences and Health, Technological University Dublin
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Appati JK, Owusu E, Agbo Tettey Soli M, Adu-Manu KS. A novel convolutional Atangana-Baleanu fractional derivative mask for medical image edge analysis. J EXP THEOR ARTIF IN 2022. [DOI: 10.1080/0952813x.2022.2108147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
Affiliation(s)
- Justice Kwame Appati
- School of Physical and Mathematical Sciences, Department of Computer Science, University of Ghana Accra Ghana
| | - Ebenezer Owusu
- School of Physical and Mathematical Sciences, Department of Computer Science, University of Ghana Accra Ghana
| | - Michael Agbo Tettey Soli
- School of Physical and Mathematical Sciences, Department of Computer Science, University of Ghana Accra Ghana
| | - Kofi Sarpong Adu-Manu
- School of Physical and Mathematical Sciences, Department of Computer Science, University of Ghana Accra Ghana
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Akrong GB, Shao Y, Owusu E. Evaluation of organizational climate factors on tax administration enterprise resource planning (ERP) system. Heliyon 2022; 8:e09642. [PMID: 35706946 PMCID: PMC9189892 DOI: 10.1016/j.heliyon.2022.e09642] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 09/10/2021] [Accepted: 05/29/2022] [Indexed: 11/25/2022] Open
Abstract
Tax collection is an essential activity to boost the economy of all countries. Larger businesses and governments are increasingly relying on Enterprise Resource Planning (ERP) systems, which are designed to enhance the collection of revenues among other things. However, the implementation of an ERP system often affects the organizational climate by changing the manner businesses are conducted from the past both internally and externally. These changes have the tendency to impact the actions of workers throughout the transition process. Nevertheless, organization climate which is an essential variable to measure the success of ERPs is mostly underutilized. Thus in this study, we proposed an information system (IS) success model that integrates organizational climate variables namely, role clarity, teamwork and support, and, training and learning into the DeLone and McLean model to evaluate the success of a tax ERP system. The proposed model was based on a quantitative and a mixed-method case study (MM-CS). Data was gathered from a top company with many branches in Ghana through interviews, observation, focus groups, and questionnaires. Partial least squares structural equation modeling was used to examine the 555 data collected from the questionnaire. The result of the study shows that the organizational climate variables (training & learning, teamwork & support, and role clarity) were statistically significant in determining the success of a tax ERP system. Training & learning and teamwork & support also had a positive impact on service quality, user satisfaction, and individual impact.
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Affiliation(s)
- Godwin Banafo Akrong
- School of Management and Economics, University of Electronic Science and Technology of China, Chengdu, 611731, China.,Center of West African Studies, University of Electronic Science and Technology of China, Chengdu, 611731, China
| | - Yunfei Shao
- School of Management and Economics, University of Electronic Science and Technology of China, Chengdu, 611731, China.,Center of West African Studies, University of Electronic Science and Technology of China, Chengdu, 611731, China
| | - Ebenezer Owusu
- Department of Computer Science, University of Ghana, Ghana
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Owusu E, Appati JK, Okae P. Robust facial expression recognition system in higher poses. Vis Comput Ind Biomed Art 2022; 5:14. [PMID: 35575952 PMCID: PMC9110625 DOI: 10.1186/s42492-022-00109-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Accepted: 04/19/2022] [Indexed: 11/25/2022] Open
Abstract
Facial expression recognition (FER) has numerous applications in computer security, neuroscience, psychology, and engineering. Owing to its non-intrusiveness, it is considered a useful technology for combating crime. However, FER is plagued with several challenges, the most serious of which is its poor prediction accuracy in severe head poses. The aim of this study, therefore, is to improve the recognition accuracy in severe head poses by proposing a robust 3D head-tracking algorithm based on an ellipsoidal model, advanced ensemble of AdaBoost, and saturated vector machine (SVM). The FER features are tracked from one frame to the next using the ellipsoidal tracking model, and the visible expressive facial key points are extracted using Gabor filters. The ensemble algorithm (Ada-AdaSVM) is then used for feature selection and classification. The proposed technique is evaluated using the Bosphorus, BU-3DFE, MMI, CK + , and BP4D-Spontaneous facial expression databases. The overall performance is outstanding.
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Affiliation(s)
- Ebenezer Owusu
- Department of Computer Science, University of Ghana, P. O. Box LG 163, Accra, Ghana
| | - Justice Kwame Appati
- Department of Computer Science, University of Ghana, P. O. Box LG 163, Accra, Ghana.
| | - Percy Okae
- Department of Computer Engineering, University of Ghana, P. O. Box LG 77, Accra, Ghana
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Appati JK, Yaokumah W, Owusu E, Ammah PNT. Primary Mobile Image Analysis of Human Intestinal Worm Detection. International Journal of System Dynamics Applications 2022. [DOI: 10.4018/ijsda.302631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
One among a lot of public health concerns in rural and tropical areas is the human intestinal parasite. Traditionally, diagnosis of these parasites is by visual analysis of stool specimens, which is usually tedious and time-consuming. In this study, the authors combine techniques in the Laplacian pyramid, Gabor filter, and wavelet to build a feature vector for the discrimination of intestinal worm in a low-resolution image captured with mobile devices. The dimension of the feature vector is reduced using principal component analysis, and the resultant vector is considered as input to the SVM classifier. The proposed framework was applied to the Makerere intestinal dataset. At its preliminary stage, the results demonstrate satisfactory classification with an accuracy rate of 65.22% with possible extension in future work.
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Akrong GB, Shao Y, Owusu E. Overcoming the Challenges of Enterprise Resource Planning (ERP). International Journal of Enterprise Information Systems 2022. [DOI: 10.4018/ijeis.306242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The study presents the results of a comprehensive review conducted between 2005-2020 to identify Enterprise Resource Planning (ERP) challenges, discover the divisions in which these challenges can be clustered, and provide general strategies to resolve these challenges. The study also found 25 categories that can be classified into ERP challenges. 65 ERP challenges were identified based on the reviewed literature, of which 18 were not provided with adequate solutions as to how to resolve them, and the related solutions as mentioned in the reviewed literature are presented in-depth. The result will help both academics and practitioners involved with how to resolve ERP system challenges.
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Affiliation(s)
| | - Yunfei Shao
- University of Electronic Science and Technology of China, China
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Akrong GB, Shao Y, Owusu E. Assessing the Impact of System Quality, Information Quality, and Service Quality on Enterprise Resource Planning (ERP) Systems. International Journal of Enterprise Information Systems 2021. [DOI: 10.4018/ijeis.2021100104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Globally, governments are taking steps to help them increase their income generation margin by implementing tax administrative ERP systems. However, the impacts on the internal system users of these ERP system quality features have not drawn the attention needed. This study, therefore, examines the relationship between the information systems' (IS) quality and individual impact using the theoretical foundation of the DeLone and McLean IS success model and, secondly, addresses the interrelationships between the quality constructs of information systems (IS). The authors also used the structural equation modeling technique of partial least squares to evaluate and analyze the data. The results show that system quality, the information quality, and the service quality characteristics of the tax administrative ERP system have a strong positive impact on the success of the IS at the individual level. There is also a positive relationship between the information systems' (IS) quality construction. The results provide additional empirical observations and consequences for management.
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Affiliation(s)
| | - Yunfei Shao
- University of Electronic Science and Technology of China, China
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Akowuah PK, Kobia-Acquah E, Donkor R, Arthur C, Senanu EN, Dadzie EE, Frimpong AA, Otabil FA, Mbilia H, Owusu E, Adjei-Anang J. PREVALENCE OF MEIBOMIAN GLAND DYSFUNCTION IN AFRICA: A SYSTEMATIC REVIEW AND META-ANALYSIS OF OBSERVATIONAL STUDIES. Ophthalmic Epidemiol 2021; 29:374-383. [PMID: 34338611 DOI: 10.1080/09286586.2021.1958351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
PURPOSE To review and summarize information on meibomian gland dysfunction (MGD) epidemiology in Africa. METHODS A systematic search of online databases was conducted for literature/studies on MGD in Africa. Meta-analysis was conducted to estimate the prevalence of MGD in Africa. Meta-regression was used to explore sources of heterogeneity. RESULTS Twelve studies conducted in five countries were included in the review. All studies were hospital-based studies. Nine studies were included in the meta-analysis; the total sample size was 4963 and participants' age range was 17-96 years. The overall prevalence estimate of MGD in Africa was 45.9% (95% CI: 27.6-64.1%). Prevalence of MGD among males and females were each pooled from three studies and in urban and rural setting from 6 and 3 studies, respectively. Prevalence of MGD among males and females were 56.0% (95% CI: 22.4-89.5%) and 58.9% (95% CI: 28.5-89.4%) respectively; in urban and rural settings were 42.8% (95% CI: 21.1-64.5%) and 65.7% (95% CI: 25.7-95.7%), respectively. There was no association of MGD with sex (p = .872) and with study setting (p = .231). CONCLUSION There is a paucity of evidence on MGD prevalence in Africa, emphasizing the need for epidemiological studies to enhance our understanding of region-specific differences in MGD in Africa. The pooled estimate from hospital-based studies, however, suggests a substantial MGD burden in Africa. Epidemiological studies are needed to assess if this translates to a high disease burden within the general African population.
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Affiliation(s)
- Prince Kwaku Akowuah
- Department of Optometry, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana.,College of Optometry and Visual Science, University of Houston, Houston, Texas, USA
| | - Emmanuel Kobia-Acquah
- Department of Optometry, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana.,Centre for Eye Research Ireland, School of Physics, Clinical and Optometric Sciences, College of Sciences and Health, Technological University Dublin, Dublin, Ireland
| | - Richard Donkor
- School of Optometry and Vision Science, University of Waterloo, Waterloo, Canada
| | - Christabel Arthur
- Department of Optometry, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Esther Nutifafa Senanu
- Department of Optometry, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana.,School of Optometry, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Emmanuela Esi Dadzie
- Department of Optometry, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Asafo Agyei Frimpong
- Department of Optometry, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Fredrick Annan Otabil
- Department of Optometry, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Henry Mbilia
- Eye Department, CCBRT Disability Hospital, Dar Es Salaam, Tanzania
| | - Ebenezer Owusu
- Department of Optometry, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Joseph Adjei-Anang
- Department of Optometry, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
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Appati JK, Denwar IW, Owusu E, Soli MAT. Construction of an Ensemble Scheme for Stock Price Prediction Using Deep Learning Techniques. International Journal of Intelligent Information Technologies 2021. [DOI: 10.4018/ijiit.2021040104] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
This study proposes a deep learning approach for stock price prediction by bridging the long short-term memory with gated recurrent unit. In its evaluation, the mean absolute error and mean square error were used. The model proposed is an extension of the study of Hossain et al. established in 2018 with an MSE of 0.00098 as its lowest error. The current proposed model is a mix of the bidirectional LSTM and bidirectional GRU resulting in 0.00000008 MSE as the lowest error recorded. The LSTM model recorded 0.00000025 MSE, the GRU model recorded 0.00000077 MSE, and the LSTM + GRU model recorded 0.00000023 MSE. Other combinations of the existing models such as the bi-directional LSTM model recorded 0.00000019 MSE, bi-directional GRU recorded 0.00000011 MSE, bidirectional LSTM + GRU recorded 0.00000027 MSE, LSTM and bi-directional GRU recorded 0.00000020 MSE.
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Kobia-Acquah E, Ankamah-Lomotey S, Owusu E, Forfoe S, Bannor J, Koomson JA, Opoku M, Dzikpo DM, Mensah DNO, Amonoo JN, Akowuah PK. Prevalence and associated risk factors of symptomatic dry eye in Ghana: A cross-sectional population-based study. Cont Lens Anterior Eye 2021; 44:101404. [DOI: 10.1016/j.clae.2020.12.067] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2020] [Revised: 12/29/2020] [Accepted: 12/30/2020] [Indexed: 11/30/2022]
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Amoah RE, Kalakandan S, Wireko‐Manu FD, Oduro I, Saalia FK, Owusu E. The effect of vinegar and drying (Solar and Open Sun) on the microbiological quality of ginger ( ZINGIBER OFFICINALE ROSCOE) rhizomes. Food Sci Nutr 2020; 8:6112-6119. [PMID: 33282262 PMCID: PMC7684629 DOI: 10.1002/fsn3.1902] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 09/01/2020] [Accepted: 09/04/2020] [Indexed: 12/17/2022] Open
Abstract
This study evaluated the influence of 10% vinegar and solar drying using two solar dryers and open-sun drying on the microbiological quality of ginger (Zingiber officinale Roscoe) rhizome. The rhizomes were analyzed for bacterial, mold, and Salmonella populations in the raw state, which were water-washed and soaked in 10% vinegar, and in dried form. The fungal population was isolated and identified. Fresh and dried ginger rhizome contained both bacterial and fungal population in the range of 3.0 x 102 ± 1.14 x 102 to 2,180 x 109 ± 70.7 x 109 CFU/g. The stainless steel solar dryer had fewer fungal loads among the drying methods. Aspergillus and Penicillium species of mycotoxin-producing potential were identified. The 10% vinegar as pretreatment showed no significant difference (p ≤ .05) in the bacterial population reduction but in the fungal population reduction. Growth of fungi in fresh and dried ginger extracts was lower compared with growth in Potato Dextrose Broth.
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Affiliation(s)
| | - Sureshkumar Kalakandan
- Department of Food BiotechnologyIndian Institute of Food processing Technology (IIFPT)ThanjavurTamil NaduIndia
| | - Faustina D. Wireko‐Manu
- Department of Food science and TechnologyKwame Nkrumah University of Science and TechnologyKumasiGhana
| | - Ibok Oduro
- Department of Food science and TechnologyKwame Nkrumah University of Science and TechnologyKumasiGhana
| | | | - Ebenezer Owusu
- Department of Plant and Environmental BiologyUniversity of GhanaLegonGhana
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Kobia-Acquah E, Owusu E, Akuffo KO, Koomson NY, Pascal TM. Career aspirations and factors influencing career choices of optometry students in Ghana. PLoS One 2020; 15:e0233862. [PMID: 32470090 PMCID: PMC7259716 DOI: 10.1371/journal.pone.0233862] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Accepted: 05/13/2020] [Indexed: 11/19/2022] Open
Abstract
Optometry students in clinical years are usually faced with the challenges of making a career choice in or outside optometry. This cross sectional study was conducted to investigate the career aspirations of optometry students in Ghana. All students in their fourth to sixth year who consented to participate in the study responded to a questionnaire which explored: demographic characteristics, career aspirations, and factors influencing their choices. Descriptive statistics was used to present data as frequencies, proportions and percentages. Chi-square test and logistic regression analysis were used to evaluate relationships between variables. Two hundred and nine students from the two optometry training institutions in Ghana; Kwame Nkrumah University of Science and Technology (49.8%) and University of Cape Coast (51.2%) responded to the questionnaire. The mean (SD) age of students was 23.6 (1.9) years (males = 65.6%). On seeking admission into the university, optometry (65.6%) and human biology/medicine (28.2%) were the leading first choice programmes among participants. Participants largely aspire to be in clinical practice (64.6%) or Academia/Research (28.2%). The major factors which influenced career choices were interest in career field (64.1%) and potential good income (38.3%). Females were twice more likely to practice optometry and pursue an interest in paediatric optometry than males. Institution of study (p = .028) and information on career opportunities (p = .018) were significant predictors of students' decision to pursue a career in academia/research. Optometry students in Ghana largely aspire to be in clinical practice, a finding which is useful for optometry training institutions and relevant stakeholders in developing the optometry programme and projecting its future in Ghana.
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Affiliation(s)
- Emmanuel Kobia-Acquah
- Department of Optometry and Visual Science, Kwame Nkrumah University of Science and Technology, Private Mail Bag, University Post Office, Kumasi, Ghana
- * E-mail: ,
| | - Ebenezer Owusu
- Department of Optometry and Visual Science, Kwame Nkrumah University of Science and Technology, Private Mail Bag, University Post Office, Kumasi, Ghana
| | - Kwadwo Owusu Akuffo
- Department of Optometry and Visual Science, Kwame Nkrumah University of Science and Technology, Private Mail Bag, University Post Office, Kumasi, Ghana
| | - Nana Yaa Koomson
- Department of Optometry and Visual Science, Kwame Nkrumah University of Science and Technology, Private Mail Bag, University Post Office, Kumasi, Ghana
| | - Tchiakpe Michel Pascal
- Department of Optometry and Visual Science, Kwame Nkrumah University of Science and Technology, Private Mail Bag, University Post Office, Kumasi, Ghana
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Bediako-Bowan A, Owusu E, Debrah S, Kjerulf A, Newman MJ, Kurtzhals JAL, Mølbak K. Surveillance of surgical site infection in a teaching hospital in Ghana: a prospective cohort study. J Hosp Infect 2020; 104:321-327. [PMID: 31931045 DOI: 10.1016/j.jhin.2020.01.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Accepted: 01/01/2020] [Indexed: 11/30/2022]
Abstract
BACKGROUND Surveillance systems for surgical site infections (SSIs), as a measure of patient safety, help health institutions devise strategies to reduce or prevent them. No surveillance systems exist to monitor SSIs in Ghana. AIM To establish a system for monitoring trends and detecting outbreaks in order to create awareness of and control SSIs. METHODS An active 30-day surveillance was undertaken at the general surgical unit of the Korle Bu Teaching Hospital, from July 1st, 2017 to December 31st, 2018 to identify SSI. It involved a daily inpatient surveillance of patients who had had a surgical procedure, followed by post-discharge surveillance by means of a healthcare personnel-based survey and a patient-based telephone survey. We supplied quarterly feedback of results to surgeons. FINDINGS Among the 3267 patients included, 331 were identified with an SSI, a 10% incidence risk. Patients who acquired an SSI experienced increased morbidity including nine extra days in hospital and an adjusted relative mortality risk of 2.3 (95% confidence interval: 1.3 - 4.1; P=0.006) compared to patients without SSI. Forty-nine per cent (161/331) of SSIs were diagnosed post discharge using the healthcare personnel-based survey. The patient-based telephone survey contributed 12 additional cases. SSI incidence risk decreased from 12.8% to 7.5% during the study period. CONCLUSION Post-discharge surveillance is feasible using existing healthcare personnel, and the results highlight the high risk and burden of SSIs in Ghana. A surveillance system with feedback for monitoring SSIs may contribute to reducing SSIs; however, firm conclusions regarding the impact need longer observation time.
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Affiliation(s)
- A Bediako-Bowan
- Department of Surgery, School of Medicine and Dentistry, University of Ghana, Accra, Ghana; Department of Surgery, Korle Bu Teaching Hospital, Accra, Ghana; Department of Veterinary and Animal Science, University of Copenhagen, Copenhagen, Denmark; Division of Infectious Disease Preparedness, Statens Serum Institut, Copenhagen, Denmark.
| | - E Owusu
- Department of Medical Laboratory Sciences, School of Biomedical and Allied Health Science, University of Ghana, Accra, Ghana
| | - S Debrah
- Department of Surgery, University of Cape Coast, Cape Coast, Ghana
| | - A Kjerulf
- National Centre for Infection Control, Department of Infectious Disease Epidemiology and Prevention, Division of Infectious Disease Preparedness, Statens Serum Institut, Copenhagen, Denmark
| | - M J Newman
- Department of Medical Microbiology, University of Ghana Medical School, University of Ghana, Accra, Ghana
| | - J A L Kurtzhals
- Centre for Medical Parasitology at Department of Immunology and Microbiology, University of Copenhagen, Copenhagen, Denmark; Department of Clinical Microbiology, Copenhagen University Hospital (Righospitalet), Copenhagen, Denmark
| | - K Mølbak
- Department of Veterinary and Animal Science, University of Copenhagen, Copenhagen, Denmark; Division of Infectious Disease Preparedness, Statens Serum Institut, Copenhagen, Denmark
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Ossei PPS, Niako N, Ayibor WG, Asante E, Safo KF, Mensah AS, Owusu E, Appiah KL. Review of gunshot fatalities in the Northern part of Ghana; a 6 year forensic autopsy based study. J Forensic Leg Med 2019; 69:101889. [PMID: 32056806 DOI: 10.1016/j.jflm.2019.101889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Revised: 11/15/2019] [Accepted: 12/13/2019] [Indexed: 11/25/2022]
Abstract
Studies on firearm fatalities in some parts of Ghana have been reported. However, the incidence and pattern of firearm fatalities in the Northern sector of Ghana have fled the spotlight. This study aimed at reporting the incidence and pattern of gunshot fatalities autopsied within 2008 and 2013 year. There were 82(91.1%) male and 8(8.9%) female victims of gunshot deaths during the study period with an average of 15 cases annually. Where 60(66.7%) of the victims aged within 21-40; years resembling the pattern observed in several parts of the world. A significant number 28(31.1%) of the victims died of multiple shots or dispersed pellets affecting several parts of the body, followed by a single shot to the chest 18(20.0%), abdomen 17(18.9%), head 14(15.6%). Collectively, entry sites like the neck and upper limb among others accounted for 13(14.4%). Robbery accounted for 44(48.9%) followed by homicides 14(15.6%) cases. Recovered pellets, nature and legal status of firearm involved were also examined, and like in several developing countries, country-made guns played a substantial role in the firearm fatalities with calls to strengthen laws governing gun acquisition and use in the country.
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Affiliation(s)
- P P S Ossei
- Department of Pathology, KSMD, Kwame Nkrumah University of Science and Technology, Kumasi and Komfo Anokye Teaching Hospital, Ghana.
| | - N Niako
- Department of Pathology, KSMD, Kwame Nkrumah University of Science and Technology, Kumasi and Komfo Anokye Teaching Hospital, Ghana
| | - W G Ayibor
- Department of Molecular Medicine, KSMD, Kwame Nkrumah University of Science and Technology, Ghana
| | - E Asante
- Department of Pathology, KSMD, Kwame Nkrumah University of Science and Technology, Kumasi and Komfo Anokye Teaching Hospital, Ghana
| | - K F Safo
- Department of Pathology, KSMD, Kwame Nkrumah University of Science and Technology, Kumasi and Komfo Anokye Teaching Hospital, Ghana
| | - A S Mensah
- Department of Pathology, KSMD, Kwame Nkrumah University of Science and Technology, Kumasi and Komfo Anokye Teaching Hospital, Ghana
| | - E Owusu
- Department of Pathology, KSMD, Kwame Nkrumah University of Science and Technology, Kumasi and Komfo Anokye Teaching Hospital, Ghana
| | - K L Appiah
- Department of Pathology, KSMD, Kwame Nkrumah University of Science and Technology, Kumasi and Komfo Anokye Teaching Hospital, Ghana
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Tackie Ammah PN, Owusu E. Robust medical image compression based on wavelet transform and vector quantization. Informatics in Medicine Unlocked 2019. [DOI: 10.1016/j.imu.2019.100183] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Addo P, Owusu E, Adu-Addai B, Quartey M, Abbas M, Dodoo A, Ofori-Adjei D. Findings from a buruli ulcer mouse model study. Ghana Med J 2005; 39:86-93. [PMID: 17299550 PMCID: PMC1790819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/14/2023] Open
Abstract
SUMMARY INTRODUCTION Buruli ulcer disease is endemic in many developing countries in Africa. It is caused by Mycobacterium ulcerans, a toxin-producing bacterium with predilection for the skin and its deeper tissues. The exact mode of transmission is unclear and the pathogenesis is also not well understood, necessitating further elucidation through animal studies. OBJECTIVE The study assessed the infectivity of a Ghanaian Mycobacterium ulcerans isolate and the dose-response pattern in BALB/c mice. METHOD Ten standardized bacterial suspensions of different concentrations were prepared from the M. ulcerans isolate and inoculated into the foot-pads of the mice. Thereafter they were observed for clinical signs of Buruli ulcer, upon which they were serially euthanised and evaluated for pathological and microbiological changes. RESULTS Irrespective of the inoculum dose, all the experimentally infected mice developed similar clinical lesions, from erythema to foot ulceration (3.1 to 6.7 weeks after inoculation). However, the higher the inoculum dose the earlier the onset of the lesions. After the development of foot ulceration, mice that had received between 1 to 4 doses developed gangrene (5.7 to 7.2 weeks after inoculation) and died within a week, while those that had received 5 to 10 doses lost their limbs spontaneously (5.6 to 6.1 weeks after inoculation), followed by sudden clinical recovery. Eight weeks after the spontaneous amputation the amputees relapsed with concomitant metastasis, anasarca and death. Acid-fast bacilli (AFBs) were detected in inoculated and non-inoculated limbs, tails, visceral organs, faecal pellets and caecal contents of the mice. The AFBs detected in the caecal samples were innumerable and unusually long. Though AFBs were consistently detected in lymph nodes they were never detected in blood samples. CONCLUSION The findings suggest that the progression and final outcome of an M. ulcerans infection maybe dose related. The unequivocal absence of AFBs in the blood, but their consistent presence in lymph nodes located in the lower limbs right up to the neck, suggests that the microbes are disseminated through the lymphatic system rather than through the blood.
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Affiliation(s)
- P Addo
- Noguchi Memorial Institute for Medical Research, College of Health Sciences, University of Ghana, P. O. Box LG 581, Legon
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