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Agbanyo A, Agbavor B, Gyabaah S, Oppong MN, Dornu O, Antwi PB, Loglo AD, Abass KM, Amofa G, Kotey NK, Quao B, Frimpong M, Asiedu K, Amoako YA, Phillips RO. Implementation of an integrated control programme for neglected tropical diseases of the skin in Ghana: The essential role of the laboratory. J Clin Tuberc Other Mycobact Dis 2024; 35:100442. [PMID: 38680788 PMCID: PMC11046218 DOI: 10.1016/j.jctube.2024.100442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2024] Open
Abstract
Introduction In this study, we report on findings from approaches used, the outcomes and the lessons learnt from the laboratory support provided for integrated control of skin NTDs including Buruli ulcer (BU), and yaws in seven selected districts in Ghana. Methods Actions implemented from July 2018 to October 2022 included; training district-level health workers on specimen collection, storage, and transport to laboratories, integrated case searches, continual monitoring and supervision for trained health workers, laboratory confirmation of BU and yaws samples and providing results of the analysed samples to guide decision making. Descriptive analysis of data was performed. Results A total of 18,683 (including suspected BU 976; suspected yaws 10,995) individuals were screened for BU and yaws. Of 976 suspected BU cases, 16.8% [median (IQR) age 24 (12.0-37.8) years] were confirmed positive by IS2404 PCR; BU mostly presented as ulcers (78.7%); category I (37.2%) and category II (36%). 480 individuals (4.4%) had DPP positive yaws. Multiplex PCR analysis of 75 selected DPP positive cases identified; 7 DPP positive yaws cases as Treponema pallidum, 28 as Haemophilus ducreyi and 7 as Treponema pallidum/Haemophilus ducreyi coinfection. Laboratory results were sent to the districts within a median (IQR) of 5 (3 - 9) days. Conclusion The implementation of integrated diagnostic confirmation for skin NTDs is feasible with provision of timely results within a week. Multiplex diagnostic tools differentiated Treponema pallidum and Haemophilus ducreyi. There is a need to sustain active case search activities, enhance health worker training, and improve laboratory confirmation of cases as part of the overall strategy for the integrated control of skin neglected tropical diseases.
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Affiliation(s)
- Abigail Agbanyo
- Kumasi Centre for Collaborative Research into Tropical Medicine, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Bernadette Agbavor
- Kumasi Centre for Collaborative Research into Tropical Medicine, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Solomon Gyabaah
- Kumasi Centre for Collaborative Research into Tropical Medicine, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Michael Ntiamoah Oppong
- Kumasi Centre for Collaborative Research into Tropical Medicine, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Olivia Dornu
- Kumasi Centre for Collaborative Research into Tropical Medicine, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Philemon Boasiako Antwi
- Kumasi Centre for Collaborative Research into Tropical Medicine, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Aloysius Dzigbordi Loglo
- Kumasi Centre for Collaborative Research into Tropical Medicine, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | | | | | | | | | - Michael Frimpong
- Kumasi Centre for Collaborative Research into Tropical Medicine, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
- School of Medicine and Dentistry, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Kingsley Asiedu
- Department for Control of Neglected Tropical Diseases, World Health Organisation, Geneva, Switzerland
| | - Yaw Ampem Amoako
- Kumasi Centre for Collaborative Research into Tropical Medicine, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
- School of Medicine and Dentistry, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Richard Odame Phillips
- Kumasi Centre for Collaborative Research into Tropical Medicine, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
- School of Medicine and Dentistry, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
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Hongdan G, Yao D, Qiang C, Meng H, Xiaorong L, Zhihao X, Dongli M. A multiplex recombinase polymerase amplification assay combined with CRISPR/Cas12a for the detection of respiratory syncytial virus and respiratory adenovirus. J Int Med Res 2024; 52:3000605231223083. [PMID: 38230675 PMCID: PMC10798089 DOI: 10.1177/03000605231223083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Accepted: 12/11/2023] [Indexed: 01/18/2024] Open
Abstract
OBJECTIVE Respiratory syncytial virus (RSV) and respiratory adenovirus (ADV) are two common pathogens that cause acute respiratory tract infections in children. We aimed to develop a rapid method for detecting both pathogens simultaneously. METHODS The recombinase polymerase isothermal amplification (RPA) method was combined with the CRISPR/Cas detection system. The assay's specificity and sensitivity were explored by designing RPA primers and CRISPR RNAs (crRNAs) through multi-sequence comparisons, optimizing the reaction conditions, and using a fluorescent reading device. The consistency of the test results of 160 clinical pharyngeal swab samples was studied using quantitative polymerase chain reaction (qPCR) results as a comparative control. RESULTS RSV and ADV could be detected at levels as low as 104 copies/mL and 103 copies/mL, respectively, within 50 minutes with no cross-reactivity with other similar pathogens. For the clinical samples, compared with the qPCR method, the sensitivities for RSV and ADV were 98.1% and 91.4%, respectively, and the detection specificities were both 100%. The Kappa values were greater than 0.95, suggesting a high degree of consistency. CONCLUSION This method for detecting RSV and ADV is rapid, sensitive, and specific. It can accurately detect mixed infections in a timely manner, making it suitable for use in areas with scarce healthcare resources.
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Affiliation(s)
- Gao Hongdan
- School of Laboratory Medicine, Bengbu Medical College, Bengbu, Anhui, China
- Institute of Pediatrics, Shenzhen Children’s Hospital, Shenzhen, Guangdong, China
| | - Du Yao
- School of Laboratory Medicine, Bengbu Medical College, Bengbu, Anhui, China
- Institute of Pediatrics, Shenzhen Children’s Hospital, Shenzhen, Guangdong, China
| | - Chai Qiang
- Shenzhen Sea Microbiology Technology Co., Ltd., Shenzhen, Guangdong, China
| | - Huang Meng
- Shenzhen Sea Microbiology Technology Co., Ltd., Shenzhen, Guangdong, China
| | - Liu Xiaorong
- Institute of Pediatrics, Shenzhen Children’s Hospital, Shenzhen, Guangdong, China
| | - Xing Zhihao
- Institute of Pediatrics, Shenzhen Children’s Hospital, Shenzhen, Guangdong, China
| | - Ma Dongli
- School of Laboratory Medicine, Bengbu Medical College, Bengbu, Anhui, China
- Institute of Pediatrics, Shenzhen Children’s Hospital, Shenzhen, Guangdong, China
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Yalley AK, Ahiatrogah S, Kafintu-Kwashie AA, Amegatcher G, Prah D, Botwe AK, Adusei-Poku MA, Obodai E, Nii-Trebi NI. A Systematic Review on Suitability of Molecular Techniques for Diagnosis and Research into Infectious Diseases of Concern in Resource-Limited Settings. Curr Issues Mol Biol 2022; 44:4367-4385. [PMID: 36286015 PMCID: PMC9601131 DOI: 10.3390/cimb44100300] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 09/15/2022] [Accepted: 09/16/2022] [Indexed: 11/16/2022] Open
Abstract
Infectious diseases significantly impact the health status of developing countries. Historically, infectious diseases of the tropics especially have received insufficient attention in worldwide public health initiatives, resulting in poor preventive and treatment options. Many molecular tests for human infections have been established since the 1980s, when polymerase chain reaction (PCR) testing was introduced. In spite of the substantial innovative advancements in PCR technology, which currently has found wide application in most viral pathogens of global concern, the development and application of molecular diagnostics, particularly in resource-limited settings, poses potential constraints. This review accessed data from sources including PubMed, Google Scholar, the Web of Knowledge, as well as reports from the World Health Organization’s Annual Meeting on infectious diseases and examined these for current molecular approaches used to identify, monitor, or investigate some neglected tropical infectious diseases. This review noted some growth efforts in the development of molecular techniques for diagnosis of pathogens that appear to be common in resource limited settings and identified gaps in the availability and applicability of most of these molecular diagnostics, which need to be addressed if the One Health goal is to be achieved.
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Affiliation(s)
- Akua K. Yalley
- Department of Medical Laboratory Sciences, School of Biomedical and Allied Health Sciences, University of Ghana, Accra P.O. Box KB 143, Ghana
| | - Selasie Ahiatrogah
- Department of Obstetrics and Gynaecology, College of Medicine, Pan African University of Life and Earth Sciences Institute, University of Ibadan, Ibadan P.O. Box 22133, Nigeria
| | - Anna A. Kafintu-Kwashie
- Department of Medical Microbiology, University of Ghana Medical School, Accra GA-221-1570, Ghana
| | - Gloria Amegatcher
- Department of Medical Laboratory Sciences, School of Biomedical and Allied Health Sciences, University of Ghana, Accra P.O. Box KB 143, Ghana
| | - Diana Prah
- West African Centre for Cell Biology of Infectious Pathogens, University of Ghana, Accra P.O. Box LG 54, Ghana
| | - Akua K. Botwe
- Molecular Biology Unit, Kintampo Health Research Centre, Ghana Health Service, Kintampo P.O. Box 200, Ghana
| | - Mildred A. Adusei-Poku
- Department of Medical Microbiology, University of Ghana Medical School, Accra GA-221-1570, Ghana
| | - Evangeline Obodai
- Department of Virology, Noguchi Memorial Institute for Medical Research, University of Ghana, Accra P.O. Box LG 581, Ghana
| | - Nicholas I. Nii-Trebi
- Department of Medical Laboratory Sciences, School of Biomedical and Allied Health Sciences, University of Ghana, Accra P.O. Box KB 143, Ghana
- Correspondence: ; Tel.: +233-54-827-6424
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Handley BL, González-Beiras C, Tchatchouang S, Basing LA, Hugues KA, Bakheit M, Becherer L, Ries C, Njih Tabah E, Crucitti T, Borst N, Lüert S, Frischmann S, Haerpfer T, Landmann E, Amanor I, Sylla A, Kouamé-Sina MS, Ndzomo-Ngono JP, Tano A, Arhinful D, Awondo P, Ngazoa Kakou S, Eyangoh S, Addo KK, Harding-Esch EM, Knauf S, Mitjà O, Marks M. LAMP4yaws: Treponema pallidum, Haemophilus ducreyi loop mediated isothermal amplification - protocol for a cross-sectional, observational, diagnostic accuracy study. BMJ Open 2022; 12:e058605. [PMID: 35351731 PMCID: PMC8966536 DOI: 10.1136/bmjopen-2021-058605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
INTRODUCTION Yaws, caused by the bacterium Treponema pallidum subsp. pertenue, is a neglected tropical disease targeted for eradication by 2030. Improved diagnostics will be essential to meet this goal. Diagnosis of yaws has relied heavily on clinical and serological tools. However, the presence of coendemic cutaneous skin ulcer diseases, such as lesions caused by Haemophilus ducreyi (HD), means these techniques do not provide a reliable diagnosis. Thus, new diagnostic tools are needed. Molecular tools such as PCR are ideal, but often expensive as they require trained technicians and laboratory facilities, which are often not available to national yaws programmes. METHODS AND ANALYSIS The LAMP4yaws project is a cross-sectional, observational, diagnostic accuracy study of a combined Treponema pallidum (TP) and HD loop mediated isothermal amplification (TPHD-LAMP) test performed under real world conditions in three endemic countries in West Africa. Individuals with serologically confirmed yaws will be recruited in Cameroon, Côte d'Ivoire and Ghana. Each participant will provide paired swabs, one of which will be sent to the respective national reference laboratory for yaws quantitative PCR and the other will be tested for both TP and HD using the TPHD-LAMP test at local district laboratories. Sensitivity and specificity of the TPHD-LAMP test will be calculated against the reference standard qPCR. We will also assess the acceptability, feasibility and cost-effectiveness of the test. We anticipate that results from this study will support the adoption of the TPHD-LAMP test for use in global yaws eradication efforts. ETHICS AND DISSEMINATION We have received ethical approval from all relevant institutional and national ethical committees. All participants, or their parents or guardians, must provide written informed consent prior to study enrolment. Study results will be published in an open access journal and disseminated with partners and the World Health Organization. TRIAL REGISTRATION NUMBER NCT04753788.
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Affiliation(s)
- Becca Louise Handley
- Clinical Research Department, London School of Hygiene and Tropical Medicine Faculty of Infectious and Tropical Diseases, London, UK
| | - Camila González-Beiras
- Department of Infectious Diseases, Hospital Universitari Germans Trias i Pujol, Badalona, Spain
| | | | - Laud Antony Basing
- University of Ghana Noguchi Memorial Institute for Medical Research, Accra, Greater Accra, Ghana
| | - Kouadio Aboh Hugues
- National Program of African Trypanosomiasis Elimination, Abidjan, Côte d'Ivoire
- Institut Pasteur de Cote d'Ivoire, Abidjan, Lagunes, Côte d'Ivoire
| | | | - Lisa Becherer
- IMTEK - Department of Microsystems Engineering, University of Freiburg, Freiburg im Breisgau, Germany
| | - Christina Ries
- Institute of International Animal Health/One Health, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Greifswald - Insel Riems, Germany
| | - Earnest Njih Tabah
- National Buruli Ulcer, Leprosy, Yaws and Leishmaniasis Control Program, Ministry of Public Health, Yaounde, Centre Region, Cameroon
- Public Health & Epidemiology, University of Dschang, Yaounde, West Region, Cameroon
| | - Tania Crucitti
- Experimental Bacteriology Unit, Institut Pasteur de Madagascar, Antananarivo, Madagascar
| | - Nadine Borst
- IMTEK - Department of Microsystems Engineering, University of Freiburg, Freiburg im Breisgau, Germany
| | - Simone Lüert
- Institute of International Animal Health/One Health, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Greifswald - Insel Riems, Germany
| | | | - Tamara Haerpfer
- IMTEK - Department of Microsystems Engineering, University of Freiburg, Freiburg im Breisgau, Germany
| | | | - Ivy Amanor
- University of Ghana Noguchi Memorial Institute for Medical Research, Accra, Greater Accra, Ghana
| | - Aboubacar Sylla
- Institut Pasteur de Cote d'Ivoire, Abidjan, Lagunes, Côte d'Ivoire
| | | | | | - Adingra Tano
- Institut Pasteur de Cote d'Ivoire, Abidjan, Lagunes, Côte d'Ivoire
| | - Daniel Arhinful
- University of Ghana Noguchi Memorial Institute for Medical Research, Accra, Greater Accra, Ghana
| | | | | | | | - Kennedy Kwasi Addo
- Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Ghana
| | - Emma Michele Harding-Esch
- Clinical Research Department, London School of Hygiene and Tropical Medicine Faculty of Infectious and Tropical Diseases, London, UK
| | - Sascha Knauf
- Institute of International Animal Health/One Health, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Greifswald - Insel Riems, Germany
| | - Oriol Mitjà
- Department of Infectious Diseases, Hospital Universitari Germans Trias i Pujol, Badalona, Spain
| | - Michael Marks
- Clinical Research Department, London School of Hygiene and Tropical Medicine Faculty of Infectious and Tropical Diseases, London, UK
- Hospital for Tropical Diseases, London, UK
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