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Schistosomiasis control in Senegal:results from community data analysis for optimizing preventive chemotherapy intervention with praziquantel

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Infectious Diseases of Poverty 2023年第6期12卷 101-102页

作者： Boubacar Diop Khadime Sylla NDèye MBackéKane Oumou Kaltoum Boh babacar Guèye Mady Ba Idrissa Talla Malang Mané Rose Monteil Boniface Kinvi Honorat Gustave Marie Zoure Jorge Cano Ortega Pauline Mwinzi Moussa Sacko babacar faye Programme National de Lutte Contre les Bilharzioses et les Géo-Helminthiases Direction de la Lutte Contre la Maladie (DLM) Ministère de la Santé et de l’Action Sociale (MSAS) Dakar Senegal Department of Parasitology and Mycology Faculty of Medicine Pharmacy and Odontology Université Cheikh Anta Diop de Dakar (UCAD) Dakar Senegal WHO Country Office Dakar Senegal Département de Santé Publique Faculté des Sciences de la Santé Université Amadou Hampathé Ba Dakar Senegal FHI 360 Chargé des Enquêtes et Evaluation des Maladies et des Campagnes de DMM Dakar Senegal Expanded Special Project for Elimination of Neglected Tropical Diseases (ESPEN) WHO Africa Regional Office Brazzaville Congo Service de Parasitologie Institut National de Santé Publique (INSP) Bamako Mali

Background Over the past two decades,preventive chemotherapy(PC)with praziquantel(PZQ)is the major strategy for controlling schistosomiasis in *** objective of this analysis was to update the endemicity of schistosomiasis at community level for better targeting mass treatment with PZQ in *** Demographic and epidemiological data from 1610 community health areas were analyzed using the schistosomiasis community data analysis tool of Expanded Special Project for Elimination of Neglected Tropical Diseases which developed by World Health Organization/Africa Ofce(WHO/AFRO).The tool uses a WHO/AFRO decision tree for areas without epidemiological data to determine whether mass treatment should be continued at community *** analysis was *** Overall,the endemicity of 1610 community health areas were updated based on the data from the district endemicity(33.5%)and the form of Join request for selected PC medicine(40.5%).Up to 282(17.5%)and 398(24.7%)of community health areas were classifed as moderate and high endemicity.41.1%of communities were non *** endemicity was more important in Tambacounda,Saint Louis,Matam,Louga and Kedougou.A change in endemicity category was observed when data was disagregted from district level to community *** units classifed non endemic were more important at community level(n=666)compared to district level(n=324).Among 540 areas previously classifed high endemic at district level,392(72.6%)remained high prevalence category,while 92(17.0%)became moderate,43(8.0%)low and 13(2.4%)non-endemics at community *** of implementation units requiring PC was more important at district level(1286)compared to community level(944).Number of school aged children requiring treatment was also more important at district level compared to community *** The analysis to disaggregate data from district level to community level using the WHO/AFRO schistosomiasis sub-distric

关键词： Schistosomiasis Community data analysis Endemicity Praziquantel Senegal

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Comparison of Two Molecular Diagnostic Tests for COVID-19: Abbott RealTime SARS-CoV-2 and Allplex™2019-nCoV, in the Epidemic Context in Senegal

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American Journal of Molecular Biology 2023年第1期13卷 46-56页

作者： babacar faye Oulimata Gueye Doudou Georges Massar Niang babacar Mbengue Alioune Dièye Laboratory of Molecular Biology Military Hospital of Ouakam Dakar Senegal AIDS Program of the Senegalese Armed Forces Military Hospital of Ouakam Dakar Senegal Service of Molecular Biology Department of Pharmacy Faculty of Medicine Pharmacy and Odonto-Stomatology Cheikh Anta Diop University Dakar Senegal Service of Immunology Department of Pharmacy Faculty of Medicine Pharmacy and Odonto-Stomatology Cheikh Anta Diop University Dakar Senegal

Background: The persistence of the rapid spread of the COVID-19 pandemic is linked to the appearance of several variants of SARS-CoV2 with an impact on biological diagnosis, treatment and vaccination. The United States Food and Drug Administration (FDA) has granted several SARS-CoV-2 detection tests Emergency Use Authorization (EUA) for diagnosis and better epidemiological surveillance. Thus, multiple RT-PCR tests have been developed and brought to market in order to meet the urgent need for the diagnosis of COVID-19. However, comparative data between these tests in clinical laboratories are scarcely available to assess their performance. Objective: To compare two molecular methods for detecting SARS-CoV-2: the RT-PCR, Allplex™2019-nCoV tests on CFX96 Bio-Rad and the Abbott m2000sp/rt RealTime SARS-CoV-2. Materials and Methods: Nasopharyngeal and oropharyngeal swabs were taken from patients to diagnose SARS-CoV-2 infection. For each sample, we searched for the virus with two different RT-PCR tests: 1) first on Abbott m2000 SARS-CoV-2 targeting the N and RdRp genes, 2) then on Allplex™2019-nCoV Assay looking for the E, N and RdRp genes. Results: Percentages of the agreement were calculated. A total of 100 samples that tested negative and 90 positives on Abbott m2000 SARS-CoV-2 were retested on Allplex™2019-nCoV. Overall agreement was 74.74% on all samples. The specific agreement was 84% and 64.4% respectively for negative and positive samples with the RealTime SARS-CoV-2 test. A positive correlation (r2 = 0.63;p Conclusion: Our results showed good overall agreement between RT-PCR, Allplex™2019-nCoV and Abbott RealTime SARS-CoV-2 tests in the diagnosis of COVID-19. As the concordance is low for small viremias, the RT-PCR Allplex™2019-nCoV Assay would be better indicated during the acute and symptomatic phase of the disease.

关键词： SARS-CoV-2 COVID-19 Diagnostics RT-PCR Abbott RealTime Seegene-Allplex

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Modeling a Local Geoid: Application in Thies, Senegal

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International Journal of Geosciences 2024年第11期15卷 940-956页

作者： Mouhamadou Moustapha Mbacké Ndour Papa Matar Sylla babacar faye Moussa Mbacké Ndour UFR-SI University of Iba Der Thiam Thies Senegal Holding Gueye Dakar Senegal Simon & Christiansen Afrique (S.C.A) Dakar Senegal

Many applications in geodesy, hydrography and engineering require determining heights linked to the geoid. Direct leveling, which is the traditional method of obtaining these elevations, is slow, time consuming and expensive. The contribution of space techniques can make it possible to overcome these constraints provided that we have a precision geoid model compatible with that obtained by the GNSS method. There are today relatively precise regional geoid models, at least outside of mountain ranges, in all developed countries, which is not yet the case in developing countries like Senegal. An alternative is to use local models restricted to a small area. Thus, this study aims to produce a geoid model by combining multi-source data for the city of Thies intended mainly to support leveling operations by GNSS. To achieve this objective, direct precision leveling and GNSS leveling (static mode) were carried out covering the study area. The reference points used are, among others, those of the RRS04 (Reference Network of Senegal 2004) and the NGAO53 (General Leveling of West Africa 1953). Additionally, gravimetric measurements were conducted using the Sensor Play-Data Recorder application. The calculation of the model was carried out by the SRBF (Spherical Radial Basis Function) method using the PAGravf4.5 software. The SRBF method uses EGM08 to first calculate height and gravity anomalies. These are then compared with the raw data in order to determine the residuals which will allow the model to be refined. In order to validate our model, control points (GNSS/leveled) were chosen based on a homogeneous geographical distribution in the area in order to evaluate their altitude. An accuracy of less than 2 cm was obtained. Comparing our model with the existing local model GGSV12v1 shows that our model is more accurate.

关键词： Geoid Direct Leveling GNSS Gravity PAGravf4.5 SRBF Thies

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Molecular Genotyping of Human Papillomaviruses (HPV) in HIV+ and HIV−Women in Senegal

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American Journal of Molecular Biology 2022年第2期12卷 54-66页

作者： babacar faye Serigne A. A. M. Gueye Jean A. D. Tine Hameth Sarr Alioune Dièye Laboratory of Molecular Biology Military hospital of Ouakam (HMO) Dakar Senegal AIDS Program of the Senegalese Armed Forces Dakar Senegal Service of Immunology Department of Pharmacy Faculty of Medicine Pharmacy and Odonto-Stomatology of Cheikh Anta Diop University Dakar Senegal Public Health Unit Faculty of Medecine Pharmacy and Odonto-Stomatology of Cheikh Anta Diop University Dakar Senegal

Background: Different studies have demonstrated high prevalence of HPV infection and dysplastic lesions of the cervix in immunocompromised patient such as women living with HIV. Is this high prevalence due to a greater susceptibility to HPV infection, which is known to be frequent in its latent form in women? Objective: This study aims to identify HPV genotypes in HIV+ and HIV−women to understand HPV molecular epidemiology in Senegal. Material and Method: Endocervical samples from 331 HIV+ and HIV−women, sexually active, were collected. The molecular identification of the 28 genotypes studied (19 HPV-HR and 9 HPV-LR) was carried out after DNA extraction, by multiplex PCR with the Anyplex™II HPV28 detection kit from Seegene on CFX96™Bio-Rad machine. The comparisons were made by calculating the p-value and odds ratio with R Studio software (version 4.1.0). The results were considered significant if p Results: The general prevalence of HPV was significantly higher in HIV+ women with 78.95% vs 64.65% for HPV;72.18% vs 57.07% for HPV-HR;57.14% vs 34.34% for HPV-BR (p −women. Conclusion: Our results showed that the prevalence of HPV, HPV-HR and HPV-BR was significantly higher in HIV+ women. Non-vaccine genotypes were among the most found genotypes. Groups of HIV+ women aged between 35 and 50, married and using contraception were significantly more infected with HPV than the same groups of HIV-women.

关键词： HPV Prevalence Genotypes HIV PCR

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Molecular Genotyping of Human Papillomavirus (HPV) in Hypopharyngeal Cancer

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American Journal of Molecular Biology 2023年第4期13卷 227-240页

作者： babacar faye Soukeynatou Diabira Omar Bassoum Doudou G. M. Niang Malick Ndiaye Baye Karim Diallo Alioune Dièye Laboratory of Molecular Biology Military Hospital of Ouakam (HMO) Dakar Senegal AIDS Program of the Senegalese Armed Forces Military Hospital of Ouakam (HMO) Dakar Senegal Service of Molecular Biology Department of Pharmacy Faculty of Medicine Pharmacy and Odonto-Stomatology of the Cheikh Anta Diop University of Dakar Dakar Senegal Public Health Unit Faculty of Medecine Pharmacy and Odonto-Stomatology of Cheikh Anta Diop University of Dakar Dakar Senegal Service of Immunology Department of Pharmacy Faculty of Medicine Pharmacy and Odonto-Stomatology of the Cheikh Anta Diop University of Dakar Dakar Senegal Service of ORL Fann Hospital Dakar Senegal

Background: In recent years, head and neck cancers have become common worldwide, ranking sixth in incidence. In 2007, in France the incidence increased by 14,697 including 11,158 among men, which places them in fourth place. The same year, 32,268 patients were hospitalized for this pathology, but 95% are associated with alcohol and tobacco poisoning. Few data exist on these cancers in Africa and Senegal. In recent years, many studies have hypothesized that about 25% of head and neck cancers are associated with high-risk oncogenic human papillomaviruses (HPV) whose role in cervical cancer was already widely established. Objective: To know the prevalence and genotypes of HPV in head and neck cancers, particularly hypopharyngeal cancer. Material and method: This study was carried out on samples of biopsies of hypopharynx cancerous tissue (ulcerative-budding lesion) and healthy oropharyngeal tissue obtained from the ENT department of the Fann hospital, then sent to the Molecular Biology Unit of the Ouakam military hospital (HMO). The nucleic acids extraction was carried out using the standard method of the Zymo research kit “Quick-DNATM Miniprep Plus kit” https://***/. Molecular HPV detection and genotyping were performed by multiplex RT-PCR with the Seegene AnyplexTM II HPV28 kit Detection on a Biorad CFX96 automaton according to the manufacturer’s protocol for the simultaneous genotyping of 28 types of HPV including 19 at High Risk (HR) and 9 low risk (LR). Results: 156 patients were sampled, 61 Hypopharynx cancer biopsies and 95 healthy tissues. The median age of the general population was 36.5 years [12, 73];the median age of the population with hypopharyngeal cancer of 40 years. Of the general study population 24.36% (38/156) was infected with HPV. In populations with hypopharyngeal cancer, HPV prevalence was 19.67% (12/61), 17.84% (5/28) in men and 21.21% (7/33) in women. HPV6 was the most frequently encountered genotype in t

关键词： HPV Genotypes RT-PCR ENT Cancer Hypopharynx

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Assessment of HRP2-Based RDT in Diagnosing Malaria Cases

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Journal of Life Sciences 2012年第6期6卷 602-607页

作者： Yemou Dieng Doudou Sow Therese Dieng Abdourahmane Sow babacar faye Jean Louis Ndiaye Daouda Ndiaye Roger Cl6ment Tine Khadime Sylla Oumar faye Oumar Ndir Oumar Gaye Department of Parasitology-Mycology Dakar Universite Cheikh Anta Diop Dakar Fann 5005 Senegal Department of Parasitology-Mycology Dakar Centre HospitaIier Universitaire National de Farm Dakar 5035 Senegal

Background： HRP2-based Rapid Diagnostic Tests （RDTs） for malaria ensure a rational use of artemisinin-based combination therapy （ACT）. The HRP2 antigen can go through the cerebrospinal fluid （CSF）. Purpose： To assess the HRP2-based RDT in malaria and detect the HRP2 in CSF. Methods： From November 2006 to May 2007, all patients under 15 years showing clinical symptoms of malaria were included. RDT was performed on the CSF and peripheral blood. Results： Out of the 951 patients included, 131 （13.7%） were confirmed through RDT and 130 （13.6%） through thick blood smear. Sensitivity and specificity stood at 96.96% and 99.71% respectively, for uncomplicated cases and at 100% and 99.13% for severe cases. Tests to detect HRP2 in the CSF of 52 cases were negative. Conclusion： Tests to detect HRP2 in the CSF could make it possible to diagnose severe malaria cases when peripheral parasitemia would be below the detection threshold.

关键词： Malaria rapid diagnostic test paediatrics HRP2 antigen cerebrospinal fluid

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Profile of Plasma Galectin-3 Concentrations, Inflammatory Cytokines Levels and Lymphocytes Status in Breast Cancer under Chemotherapy

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Open Journal of Immunology 2022年第1期12卷 1-14页

作者： Doudou Georges Massar Niang Sidy Ka Jacobus Hendricks Doudou Diouf Folly Mawulolo Gaba Adame Diouf Maimouna Diop Moustapha Mbow babacar faye Rokhaya Ndiaye Diallo Maguette Deme Sylla Niang Ahmadou Deme babacar Mbengue Alioune Dieye Unit of Immunology FMPOS Cheikh Anta Diop University Dakar Senegal Unit of Immunology Aristide Le Dantec Hospital Dakar Senegal Joliot Curie Institute Aristide Le Dantec Hospital Dakar Senegal Department of Physiology University of Limpopo Limpopo South Africa Unit of Human Genetics FMPOS Cheikh Anta Diop University Dakar Senegal

We investigated relationship between galectin-3 (Gal-3) levels and T lymphocytes apoptosis and the activation rates in breast cancer during chemotherapy. We used plasma samples from 112 women classified into two groups: 70 women with breast cancer (BC) and submitted to neoadjuvant chemotherapy (3 cycles) and 42 healthy women used as controls. In the group of BC, blood samples were taken before each cycle of chemotherapy and Gal-3 levels was evaluated by ELISA sandwich. Flow cytometry was used to study T cells apoptosis and activation. Before treatment, median value of Gal-3 was 6.31 ng/ml (range 1.07 - 50.74) in BC and 0.84 ng/ml (range 0.00 - 4.82) in HC. Gal-3 levels were highest in plasmas from BC (p p p = 0.010). In addition, we found a dynamic relationship between gal-3 levels, tumor size and T lymphocytes apoptosis rates during treatment depending to the cure efficiency. We suggest gal-3 plasma concentrations could be used as predictive biomarker for chemotherapy efficiency in breast cancer patients.

关键词： Galectin-3 T Lymphocyte B Lymphocyte Breast Neoplasms

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Prevalence of Intestinal Parasitic Infection among Pre-School and School-Aged Children Attending to Fann University Hospital, Dakar: Results from Retrospective Analysis

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Advances in Infectious Diseases 2022年第4期12卷 847-860页

作者： Khadime Sylla Doudou Sow Souleye Lelo Cheikh B. Fall Isaac Akhenaton Manga Magatte Ndiaye babacar faye Thérèse Dieng Roger Clement Tine Département de Parasitologie-Mycologie Faculté de Médecine Pharmacie et Odontologie Université Cheikh Anta Diop Dakar Sénégal Laboratoire de Parasitologie-Mycologie Centre National Hospitalier Universitaire Fann Dakar Sénégal Service de Parasitologie-Mycologie UFR Sciences de la Santé Université Gaston Berger Saint-Louis Sénégal Laboratoire de Parasitologie-Mycologie Centre National Hospitalier d’enfant Albert Royer Dakar Sénégal

Background: Intestinal parasitic infections represent a major public health problem worldwide. Pre-school and school children have a high risk of infection. The study aimed to determine the epidemiological aspects of intestinal parasitic infections in preschool and school-aged children in Dakar, Senegal. Methods: A retrospective analysis of laboratory records from preschool and school-aged children referred to the Laboratory of Parasitology at the Fann University Hospital in Dakar, Senegal, was carried out. The analysis of the period from 2016 to 2020. Stool samples were examined for the presence of parasites using direct, formal-ether concentration method and the Modified Ziehl Neelsen staining technique. Descriptive and analytic analysis was performed with Stata MP 16.1 software. Results: The overall prevalence of intestinal parasitic infection was 26.8% (429/1603). Blastocystis sp. (34%), Entamaeba coli (28%), Giardia intestinalis (9.6%), Endolimax nana (4.9%) and Ascaris lumbricoides (3.5%) were the common parasites found. Out of the 429 children positive for intestinal parasites, protozoa parasites represent 93.9%. Single infection and mixed infection represent 83.7% and 16.3%. The most prevalent associations were E. coli + Blastocystis sp. (6.3%), E. coli + E. nana (3.3%), and G. intestinalis + Blastocystis sp. (1.9%). Children between the ages of 5 - 10 years and those over 10 years had the most parasitic infections with 28.1% [aOR = 1.91;95% CI (1.25 - 2.89)] and 27.4% [aOR = 11.92 (1.07 - 3.07)]. According to the year of sample collection, the prevalence was higher in 2017, 32.6% [aOR = 1.49 (1.11 - 2.01]. The prevalence of intestinal parasitic infection was not significantly related to gender (p = 0.87), season (p = 0.85) and symptomatology (p = 0.19). The main clinical symptoms were dysenteric syndrome, dyspeptic disorders, constipation and abdominal pain. Intestinal parasite carriage in patients with acute diarrhea was 20.4%. In HIV positive with chronic

关键词： Intestinal Parasites Children Epidemiology Senegal

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Relationship between Circulating Plasma Galectin-3 Levels and T-Cell Activation during Cervical Cancer Chemotherapy

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Open Journal of Immunology 2023年第1期13卷 14-31页

作者： Folly M. Gaba Maïmouna Diop Doudou G. M. Niang Sidy Ka Doudou Diouf Moussa Ndour Comlan J. G. Montcho Moustapha Mbow babacar faye Rokhaya N. Diallo Maguette S. Niang Ahmadou Dem babacar Mbengue Alioune Dieye Immunology Department Faculty of Medicine Pharmacy and Odontology University of Cheikh Anta Diop Dakar Senegal Immunology Laboratory Aristide Ledantec Hospital (HALD) Dakar Senegal Oncology Department Juliot Curie Institute Aristide Ledantec Hospital (HALD) Dakar Senegal Human Genetic Department Faculty of Medicine Pharmacy and Odontology University of Cheikh Anta Diop Dakar Senegal

Objective: Despite the existence of several therapeutic strategies, the management of cervical cancer remains challenging. Our region has very little data on the interaction between the immune system and the clinical response to chemotherapy. This work examines plasma levels of galectin-3 (Gal-3) and percentages of activated T cells in patients with cervical cancer treated with chemotherapy and investigates if there is a relationship between the rates of these two elements. Methods: We compared data from 37 patients with cervical cancer undergoing chemotherapy and 42 controls with normal cervical cytology. Plasma Gal-3 concentrations were assessed by ELISA and expression of activation markers by T cells (CD69 and HLA-DR) was assessed by flow cytometry at three different time points during chemotherapy. Results: Our results showed that patients had a significantly higher concentration of Gal-3 compared to controls (4.025 vs. 1.340, p 0.001), similarly, they had a significantly high percentage of activated lymphocytes (2.610 vs. 0.731;p 0.0001). According to the response to treatment, patients with no response to treatment had a lower concentration of circulating Gal-3 but had approximately the same percentage of activated CD4 and CD8 lymphocytes as patients with a partial or total response. In addition, we found a positive correlation between the Gal-3 level and CD4 T cells expressing the activation marker CD69 (p 0.05;rho = 0.44). Conclusion: In conclusion, our results show that there would be a relationship between circulating galectin-3 and the percentage of peripheral CD4+CD69+ cells in cervical cancer.

关键词： Uterine Cervical Neoplasm Chemotherapy Galectin 3 T-Lymphocytes Activation

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Impact of COVID-19 on Biological Diagnosis of Malaria: Case of the Thierno Mouhamadoul Mansour Barro Hospital in Mbour, Senegal

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Advances in Infectious Diseases 2023年第1期13卷 31-40页

作者： Isaac Akhénaton Manga Coura Seye Ameth Dramé Cheikh Binetou Fall Souleye Lélo Carole Pab Minlekib Marie Pierre Diouf Jean Louis Abdourahim Ndiaye Khadime Sylla babacar faye Service Parasitologie-Mycologie FMPO UCAD Dakar Senegal Ministry of Health and Social Action Dakar Senegal Hôpital Thierno Mouhamadoul Mansour Barro de Mbour Medical Region of Thiès Mbour Senegal Parasitology-Mycology Department UFR Santé Université Iba Der Thiam de Thiès Thiès Senegal

Background: In Africa, malaria-endemic regions have not been spared from COVID-19 outbreak which emerged in the first quarter of 2020. This pandemic has shown clinical and therapeutic similarities with malaria. This following study sought to determine the impact of COVID-19 on the malaria diagnosis. Method: A review of laboratory registers and an exploitation of the District Health Information Software 2 (DHIS2) to collect information on the diagnosis of malaria by microscopy and by rapid diagnostic test (RDT), but also that of COVID-19 was done from 2017 to 2021 at the Thierno Mouhamadoul Mansour Hospital in Mbour, Senegal. Results: In 2017, 199 Thick drops (TDs) and 1852 RDTs were performed for malaria diagnosis. In 2018, it was 2352 malaria tests with 2138 RDTs and 214 TDs, before reaching a peak of 3943 tests in 2019 including 3742 RDTs and 201 TDs. By 2020, 2263 tests were performed with 2097 malaria RDTs, 158 TDs and 8 COVID RDTs. The latter increased significantly in 2021, reaching 444 COVID RDTs, while TDs and malaria RDT kept decreasing to 147 and 1036 respectively. Positive TDs were higher in 2020 (11.4%) compared to 2017 (3.5%), 2018 (1.4%), 2019 (6.5%) and 2021 (6.8%). For malaria RDTs, a decrease in the number of positive tests was noted between 2017 (4.5%) and 2021 (1.3%). The COVID RDTs were all negative in 2020, 29.5% were positive and 4.1% were undetermined in 2021. Conclusion: COVID-19 has led to changes in efforts to diagnose malaria as well as an increase in malaria prevalence directed towards children under 5 years of age.

关键词： Impact COVID-19 Biological Diagnosis Malaria Senegal

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