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Ndiaye O, Woolston K, Gaye A, Loucoubar C, Cocozza M, Fall C, Dia F, Adams ER, Samb M, Camara D, Sadio BD, Diagne CT, Weidmann M, Faye O, Fitchett JRA, Sall AA, Diagne CT. Laboratory Evaluation and Field Testing of Dengue NS1 and IgM/IgG Rapid Diagnostic Tests in an Epidemic Context in Senegal. Viruses 2023; 15:v15040904. [PMID: 37112887 PMCID: PMC10143717 DOI: 10.3390/v15040904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 03/28/2023] [Accepted: 03/28/2023] [Indexed: 04/05/2023] Open
Abstract
In Senegal, the burden of dengue is increasing and expanding. As case management and traditional diagnostic techniques can be difficult to implement, rapid diagnostic tests (RDTs) deployed at point of care are ideal for investigating active outbreaks. The aim of this study was to evaluate the diagnostic performance of the Dengue NS1 and Dengue IgM/IgG RDTs on the serum/plasma samples in a laboratory setting and in the field. During laboratory evaluation, performance of the NS1 RDT was assessed using NS1 ELISA as the gold standard. Sensitivity and specificity were 88% [75–95%] and 100% [97–100%], respectively. Performance of the IgM/IG RDT was assessed using the IgM Antibody Capture (MAC) ELISA, indirect IgG, and PRNT as gold standards. The IgM and IgG test lines respectively displayed sensitivities of 94% [83–99%] and 70% [59–79%] and specificities of 91% [84–95%] and 91% [79–98%]. In the field, the Dengue NS1 RDT sensitivity and specificity was 82% [60–95%] and 75% [53–90%], respectively. The IgM and IgG test lines displayed sensitivities of 86% [42–100%] and 78% [64–88%], specificities of 85% [76–92%] and 55% [36–73%], respectively. These results demonstrate that RDTs are ideal for use in a context of high prevalence or outbreak setting and can be implemented in the absence of a confirmatory test for acute and convalescent patients.
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Affiliation(s)
- Oumar Ndiaye
- Diatropix Unit, Institut Pasteur de Dakar, Dakar BP 220, Senegal
- Virology Department, Institut Pasteur de Dakar, Dakar BP 220, Senegal
| | - Kevin Woolston
- Global Access Diagnostics, Bedford Technology Park, Bedford MK44 2YA, Bedfordshire, UK
| | - Aboubacry Gaye
- Epidemiology Clinical Research and Data Science Department, Institut Pasteur de Dakar, Dakar BP 220, Senegal
| | - Cheikh Loucoubar
- Epidemiology Clinical Research and Data Science Department, Institut Pasteur de Dakar, Dakar BP 220, Senegal
| | - Michael Cocozza
- Global Access Diagnostics, Bedford Technology Park, Bedford MK44 2YA, Bedfordshire, UK
| | - Cheikh Fall
- Microbiology Department, Institut Pasteur de Dakar, Dakar BP 220, Senegal
| | - Fatou Dia
- Diatropix Unit, Institut Pasteur de Dakar, Dakar BP 220, Senegal
- Virology Department, Institut Pasteur de Dakar, Dakar BP 220, Senegal
| | - Emily R. Adams
- Global Access Diagnostics, Bedford Technology Park, Bedford MK44 2YA, Bedfordshire, UK
| | - Marième Samb
- Diatropix Unit, Institut Pasteur de Dakar, Dakar BP 220, Senegal
| | - Diogop Camara
- Virology Department, Institut Pasteur de Dakar, Dakar BP 220, Senegal
| | | | - Cheikh T. Diagne
- Mivegec Infectious Diseases and Vector: Ecology, Genetics, Evolution and Control, Université Montpellier, IRD, CNRS, 34394 Montpellier, France
| | - Manfred Weidmann
- Institute of Microbiology and Virology, Medical School Brandenburg Theodor Fontane, D-01968 Senftenberg, Germany
| | - Oumar Faye
- Virology Department, Institut Pasteur de Dakar, Dakar BP 220, Senegal
| | | | - Amadou Alpha Sall
- Virology Department, Institut Pasteur de Dakar, Dakar BP 220, Senegal
| | - Cheikh Tidiane Diagne
- Diatropix Unit, Institut Pasteur de Dakar, Dakar BP 220, Senegal
- Virology Department, Institut Pasteur de Dakar, Dakar BP 220, Senegal
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Taguchi YH. Principal Components Analysis Based Unsupervised Feature Extraction Applied to Gene Expression Analysis of Blood from Dengue Haemorrhagic Fever Patients. Sci Rep 2017; 7:44016. [PMID: 28276456 PMCID: PMC5343617 DOI: 10.1038/srep44016] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Accepted: 02/02/2017] [Indexed: 12/12/2022] Open
Abstract
Dengue haemorrhagic fever (DHF) sometimes occurs after recovery from the disease caused by Dengue virus (DENV), and is often fatal. However, the mechanism of DHF has not been determined, possibly because no suitable methodologies are available to analyse this disease. Therefore, more innovative methods are required to analyse the gene expression profiles of DENV-infected patients. Principal components analysis (PCA)-based unsupervised feature extraction (FE) was applied to the gene expression profiles of DENV-infected patients, and an integrated analysis of two independent data sets identified 46 genes as critical for DHF progression. PCA using only these 46 genes rendered the two data sets highly consistent. The application of PCA to the 46 genes of an independent third data set successfully predicted the progression of DHF. A fourth in vitro data set confirmed the identification of the 46 genes. These 46 genes included interferon- and heme-biosynthesis-related genes. The former are enriched in binding sites for STAT1, STAT2, and IRF1, which are associated with DHF-promoting antibody-dependent enhancement, whereas the latter are considered to be related to the dysfunction of spliceosomes, which may mediate haemorrhage. These results are outcomes that other type of bioinformatic analysis could hardly achieve.
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Affiliation(s)
- Y-H Taguchi
- Department of Physics, Chuo University, Tokyo, 112-8551, Japan
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Benamar T, Tajounte L, Alla A, Khebba F, Ahmed H, Mulders MN, Filali-Maltouf A, El Aouad R. Real-Time PCR for Measles Virus Detection on Clinical Specimens with Negative IgM Result in Morocco. PLoS One 2016; 11:e0147154. [PMID: 26812434 PMCID: PMC4727926 DOI: 10.1371/journal.pone.0147154] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2015] [Accepted: 12/28/2015] [Indexed: 01/03/2023] Open
Abstract
Since the confirmation of measles cases represents an important indicator regarding the performance of the measles-elimination program, the aim of this study was to evaluate the effectiveness of the routine procedures followed in Morocco for the laboratory confirmation of measles cases. Suspected cases reported between January 2010 and December 2012 were assessed for the timeliness of the sample collection, occurrence of measles clinical symptoms, and the results of the laboratory diagnoses. For 88% of the 2,708 suspected cases, a clinical specimen was collected within 7d of rash onset, of which 50% were IgM-positive and 2.6% were equivocal. The measles symptoms were reported in 91.4% of the cases; the occurrence of symptoms showed a positive association with the serological results (odds ratio [OR] = 2.9883, 95% confidence interval [CI] 2.2238-4.0157). Of the negative samples, 52% (n = 116) tested positive by real-time polymerase chain reaction (PCR). These results are in favor of using molecular detection to complement serological diagnosis in the context of measles surveillance approach in Morocco. In addition, the introduction of additional laboratory methods for differential diagnosis is required for the final classification of suspected cases with maculopapular rash and fever in the context of the measles elimination program.
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Affiliation(s)
- Touria Benamar
- National Institute of Hygiene, Ministry of Health, Rabat, Morocco
| | - Latifa Tajounte
- National Institute of Hygiene, Ministry of Health, Rabat, Morocco
| | - Amal Alla
- Epidemiology Department, Ministry of Health, Rabat, Morocco
| | - Fatima Khebba
- National Institute of Hygiene, Ministry of Health, Rabat, Morocco
| | - Hinda Ahmed
- Department of Communicable Disease Prevention & Control, WHO/EMRO, Cairo, Egypt
| | - Mick N. Mulders
- Expanded Programme on Immunization, World Health Organization, Geneva, Switzerland
| | - Abdelkarim Filali-Maltouf
- Microbiology and Molecular Biology Laboratory, Faculty of Sciences, University Mohammed V, Rabat, Morocco
| | - Rajae El Aouad
- School of Medicine and Pharmacy, University Mohamed V Souissi, Rabat, Morocco
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Kim Lien PT, Duoc VT, Gavotte L, Cornillot E, Nga PT, Briant L, Frutos R, Duong TN. Role of Aedes aegypti and Aedes albopictus during the 2011 dengue fever epidemics in Hanoi, Vietnam. ASIAN PAC J TROP MED 2015; 8:543-8. [PMID: 26276285 DOI: 10.1016/j.apjtm.2015.06.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Revised: 05/20/2015] [Accepted: 06/15/2015] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE To record the human cases of dengue fever (DF) and investigate the Aedes mosquito species circulating during the Hanoi 2011 DF epidemics. METHODS 24 different outbreak points were recorded in 8 districts between August and December 2011. RESULTS 140 patients were hospitalized following dengue diagnostic with a predominance of males (59.3%) and the 15-34 age class. Only DENV-1 (11.27%) and DENV-2 (88.73%) serotypes were detected in human samples. Mosquito sampling performed in and around patients households revealed the predominance of Aedes aegypti (A. aegypti) (95.15%) versus Aedes albopictus (4.85%). CONCLUSIONS There is a positive correlation between the population density of A. aegypti and the number of human cases and duration of outbreaks. This was not observed for Aedes albopictus. Three pools of A. aegypti were positive with dengue virus, two with DENV-1 and one with DENV-2.
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Affiliation(s)
- Pham Thi Kim Lien
- National Institute of Hygiene and Epidemiology, 1 Yersin Street, 10000 Hanoi, Viet Nam; CPBS, UMR 5236, CNRS-UM1-UM2, 1919, route de Mende 34293 Montpellier Cedex 5, France
| | - Vu Trong Duoc
- National Institute of Hygiene and Epidemiology, 1 Yersin Street, 10000 Hanoi, Viet Nam
| | - Laurent Gavotte
- ISEM, UMR 5554, CNRS-UM2-IRD, Université Montpellier 2 CC065, Place E. Bataillon, 34095 Montpellier Cedex 5, France
| | - Emmanuel Cornillot
- CPBS, UMR 5236, CNRS-UM1-UM2, 1919, route de Mende 34293 Montpellier Cedex 5, France
| | - Phan Thi Nga
- National Institute of Hygiene and Epidemiology, 1 Yersin Street, 10000 Hanoi, Viet Nam
| | - Laurence Briant
- CPBS, UMR 5236, CNRS-UM1-UM2, 1919, route de Mende 34293 Montpellier Cedex 5, France
| | - Roger Frutos
- CPBS, UMR 5236, CNRS-UM1-UM2, 1919, route de Mende 34293 Montpellier Cedex 5, France; Intertryp, UMR 17, Cirad-IRD, Campus International de Baillarguet, 34398 Montpellier Cedex 5, France.
| | - Tran Nhu Duong
- National Institute of Hygiene and Epidemiology, 1 Yersin Street, 10000 Hanoi, Viet Nam
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Kantele A, Mattila L, Ott K, Davidkin I, Siikamäki H. Fever with rash in patients returning from popular tourist resort Phuket, Thailand: dengue--or measles? J Travel Med 2012; 19:317-9. [PMID: 22943274 DOI: 10.1111/j.1708-8305.2012.00639.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2012] [Revised: 06/12/2012] [Accepted: 06/19/2012] [Indexed: 11/29/2022]
Abstract
We report three recent cases of measles in travelers to a popular vacation resort, Phuket, Thailand, two initially diagnosed clinically as dengue, one as drug reaction. In countries with no indigenous measles, clinicians may no longer recognize the disease. When left misdiagnosed, the patients continue to be potential transmitters.
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Affiliation(s)
- Anu Kantele
- Department of Medicine, Division of Infectious Diseases, Helsinki University Central Hospital, Helsinki, Finland.
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