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Performance of clinical signs and symptoms,rapid and reference laboratory diagnostic tests for diagnosis of human African trypanosomiasis by passive screening in Guinea:a prospective diagnostic accuracy study

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Infectious Diseases of Poverty 2023年第2期12卷 117-118页

作者： Oumou Camara Mamadou Camara Laura Cristina Falzon Hamidou Ilboudo Jacques Kaboré charlie franck alfred compaoré Eric Maurice Fèvre Philippe Büscher Bruno Bucheton Veerle Lejon Programme National de Lutte contre la Trypanosomiase Humaine Africaine Conakry Guinea International Livestock Research Institute Nairobi Kenya Institute of Infection Veterinary and Ecological Sciences University of Liverpool Liverpool UK Clinical Research Unit of Nanoro Institute for Health Science Research (IRSS) Ouagadougou Burkina Faso Vector-Borne Diseases and Biodiversity Unit International Research and Development Center on Livestock in Sub-Humid Areas (CIRDES) Bobo-Dioulasso Burkina Faso Unit of Research and Training in Life and Earth Sciences University of Nazi Boni Bobo-Dioulasso Burkina Faso Department of Biomedical Sciences Institute of Tropical Medicine Antwerp Belgium UMR Intertryp IRD-CIRAD French National Research Institute for Sustainable Development (IRD) University of Montpellier Montpellier France

Background Passive diagnosis of human African trypanosomiasis(HAT)at the health facility level is a major component of HAT control in *** examined which clinical signs and symptoms are associated with HAT,and assessed the performance of selected clinical presentations,of rapid diagnostic tests(RDT),and of reference laboratory tests on dried blood spots(DBS)for diagnosing HAT in *** The study took place in 14 health facilities in Guinea,where 2345 clinical suspects were tested with RDTs(HAT Sero-K-Set,rHAT Sero-Strip,and SD Bioline HAT).Seropositives underwent parasitological examination(reference test)to confirm HAT and their DBS were tested in indirect enzyme-linked immunoassay(ELISA)/Trypanosoma brucei gambiense,trypanolysis,Loopamp Trypanosoma brucei Detection kit(LAMP)and m18S quantitative PCR(qPCR).Multivariable regression analysis assessed association of clinical presentation with ***,specificity,positive and negative predictive values of key clinical presentations,of the RDTs and of the DBS tests for HAT diagnosis were *** The HAT prevalence,as confirmed parasitologically,was 2.0%(48/2345,95%CI:1.5–2.7%).Odds ratios(OR)for HAT were increased for participants with swollen lymph nodes(OR=96.7,95%CI:20.7–452.0),important weight loss(OR=20.4,95%CI:7.05–58.9),severe itching(OR=45.9,95%CI:7.3–288.7)or motor disorders(OR=4.5,95%CI:0.89–22.5).Presence of at least one of these clinical presentations was 75.6%(95%CI:73.8–77.4%)specific and 97.9%(95%CI:88.9–99.9%)sensitive for *** Sero-K-Set,rHAT Sero-Strip,and SD Bioline HAT were respectively 97.5%(95%CI:96.8–98.1%),99.4%(95%CI:99.0–99.7%)and 97.9%(95%CI:97.2–98.4%)specific,and 100%(95%CI:92.5–100.0%),59.6%(95%CI:44.3–73.3%)and 93.8%(95%CI:82.8–98.7%)sensitive for *** RDT’s positive and negative predictive values ranged from 45.2–66.7%and 99.2–100%*** DBS tests had specificities≥92.9%.While LAMP and m18S qPCR sensitivities were below 50%,trypanolysis and E

关键词： Human African trypanosomiasis Trypanosoma brucei gambiense Diagnosis Clinical Rapid diagnostic test Sensitivity Specificity Dried blood spot Trypanolysis

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