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Nyathi S, Rezende IM, Walter KS, Thongsripong P, Mutuku F, Ndenga B, Mbakaya JO, Aswani P, Musunzaji PS, Chebii PK, Maina PW, Mutuku PS, Ng'ang'a CM, Malumbo SL, Jembe Z, Vu DM, Mordecai EA, Bennett S, Andrews JR, LaBeaud AD. Molecular epidemiology and evolutionary characteristics of dengue virus 2 in East Africa. Nat Commun 2024; 15:7832. [PMID: 39244569 PMCID: PMC11380673 DOI: 10.1038/s41467-024-51018-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Accepted: 07/25/2024] [Indexed: 09/09/2024] Open
Abstract
Despite the increasing burden of dengue, the regional emergence of the virus in Kenya has not been examined. This study investigates the genetic structure and regional spread of dengue virus-2 in Kenya. Viral RNA from acutely ill patients in Kenya was enriched and sequenced. Six new dengue-2 genomes were combined with 349 publicly available genomes and phylogenies used to infer gene flow between Kenya and other countries. Analyses indicate two dengue-2 Cosmopolitan genotype lineages circulating in Kenya, linked to recent outbreaks in coastal Kenya and Burkina Faso. Lineages circulating in Western, Southern, and Eastern Africa exhibiting similar evolutionary features are also reported. Phylogeography suggests importation of dengue-2 into Kenya from East and Southeast Asia and bidirectional geneflow. Additional lineages circulating in Africa are also imported from East and Southeast Asia. These findings underscore how intermittent importations from East and Southeast Asia drive dengue-2 circulation in Kenya and Africa more broadly.
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Affiliation(s)
- Sindiso Nyathi
- Department of Epidemiology and Population Health, Stanford University School of Medicine, Stanford, CA, 94305, USA.
| | - Izabela M Rezende
- Division of Infectious Diseases and Geographic Medicine, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Katharine S Walter
- Division of Epidemiology, Department of Internal Medicine, University of Utah School of Medicine, University of Utah, Salt Lake City, UT, 84132, USA
| | - Panpim Thongsripong
- Florida Medical Entomology Laboratory, University of Florida, Vero Beach, FL, 32962, USA
| | - Francis Mutuku
- Department of Environment and Health Sciences, Technical University of Mombasa, Mombasa, Kenya
| | - Bryson Ndenga
- Centre for Global Health Research, Kenya Medical Research Institute, Kisumu, Kenya
| | - Joel O Mbakaya
- Centre for Global Health Research, Kenya Medical Research Institute, Kisumu, Kenya
| | - Peter Aswani
- Centre for Global Health Research, Kenya Medical Research Institute, Kisumu, Kenya
| | | | - Philip K Chebii
- Vector-borne Disease Unit, Msambweni Hospital, Msambweni, Kenya
| | | | - Paul S Mutuku
- Vector-borne Disease Unit, Msambweni Hospital, Msambweni, Kenya
| | | | - Said L Malumbo
- Vector-borne Disease Unit, Msambweni Hospital, Msambweni, Kenya
| | | | - David M Vu
- Department of Pediatrics, Division of Infectious Diseases, Stanford University School of Medicine, Stanford University, Stanford, CA, 94305, USA
| | - Erin A Mordecai
- Department of Biology, Stanford University, Stanford, CA, 94305, USA
| | - Shannon Bennett
- Department of Microbiology, California Academy of Sciences, 55 Music Concourse Drive, San Francisco, CA, 94118, USA
| | - Jason R Andrews
- Division of Infectious Diseases and Geographic Medicine, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - A Desiree LaBeaud
- Department of Pediatrics, Division of Infectious Diseases, Stanford University School of Medicine, Stanford University, Stanford, CA, 94305, USA
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Brass DP, Cobbold CA, Purse BV, Ewing DA, Callaghan A, White SM. Role of vector phenotypic plasticity in disease transmission as illustrated by the spread of dengue virus by Aedes albopictus. Nat Commun 2024; 15:7823. [PMID: 39242617 PMCID: PMC11379831 DOI: 10.1038/s41467-024-52144-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Accepted: 08/21/2024] [Indexed: 09/09/2024] Open
Abstract
The incidence of vector-borne disease is on the rise globally, with burdens increasing in endemic countries and outbreaks occurring in new locations. Effective mitigation and intervention strategies require models that accurately predict both spatial and temporal changes in disease dynamics, but this remains challenging due to the complex and interactive relationships between environmental variation and the vector traits that govern the transmission of vector-borne diseases. Predictions of disease risk in the literature typically assume that vector traits vary instantaneously and independently of population density, and therefore do not capture the delayed response of these same traits to past biotic and abiotic environments. We argue here that to produce accurate predictions of disease risk it is necessary to account for environmentally driven and delayed instances of phenotypic plasticity. To show this, we develop a stage and phenotypically structured model for the invasive mosquito vector, Aedes albopictus, and dengue, the second most prevalent human vector-borne disease worldwide. We find that environmental variation drives a dynamic phenotypic structure in the mosquito population, which accurately predicts global patterns of mosquito trait-abundance dynamics. In turn, this interacts with disease transmission to capture historic dengue outbreaks. By comparing the model to a suite of simpler models, we reveal that it is the delayed phenotypic structure that is critical for accurate prediction. Consequently, the incorporation of vector trait relationships into transmission models is critical to improvement of early warning systems that inform mitigation and control strategies.
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Affiliation(s)
- Dominic P Brass
- UK Centre for Ecology & Hydrology, Benson Lane, Wallingford, Oxfordshire, UK.
- Ecology and Evolutionary Biology, School of Biological Sciences, University of Reading, Reading, UK.
| | - Christina A Cobbold
- School of Mathematics and Statistics, College of Science and Engineering, University of Glasgow, Glasgow, UK
| | - Bethan V Purse
- UK Centre for Ecology & Hydrology, Benson Lane, Wallingford, Oxfordshire, UK
| | - David A Ewing
- Biomathematics and Statistics Scotland, Edinburgh, UK
| | - Amanda Callaghan
- Ecology and Evolutionary Biology, School of Biological Sciences, University of Reading, Reading, UK
| | - Steven M White
- UK Centre for Ecology & Hydrology, Benson Lane, Wallingford, Oxfordshire, UK
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Gallian P, Dupont I, Lacoste M, Brisbarre N, Isnard C, Delouane I, Richard P, Morel P, Laperche S, de Lamballerie X. Evaluation of assays for nucleic acid testing for the prevention of chikungunya and dengue virus transmission by blood transfusion. Transfusion 2024; 64:1503-1508. [PMID: 38877832 DOI: 10.1111/trf.17921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Revised: 05/30/2024] [Accepted: 05/30/2024] [Indexed: 06/16/2024]
Abstract
BACKGROUND The large dengue (DENV) and chikungunya (CHIKV) outbreaks observed during the last decade across the world, as well as local transmissions in non-endemic areas are a growing concern for blood safety. The aim of this study was to evaluate and compare the sensitivity of nucleic acid tests (NAT) detecting DENV and CHIKV RNA. MATERIALS AND METHODS Using DENV 1 to 4 International Standards, the limits of detection (LODs) calculated by probit analysis of two NAT assays; the cobas CHIKV/DENV assay (Roche Diagnostics) and the Procleix Dengue Virus Assay (Grifols) were compared. In addition, CHIKV-RNA LOD of the cobas CHIKV/DENV assay was evaluated. RESULTS For dengue, the 95% LOD of the cobas assay ranged between 4.10 [CI95%: 2.70-8.19] IU/mL (DENV-2) and 7.07 [CI95%: 4.34-14.89] IU/mL (DENV-4), and between 2.19 [CI95%: 1.53-3.83] IU/mL (DENV-3) and 5.84 [CI95%: 3.84-10.77] IU/mL (DENV-1) for Procleix assay. The Procleix assay had a significant lower LOD for DENV-3 (2.19 vs. 5.89 IU/mL) when compared to the cobas assay (p = 0.005). The 95% LOD for CHIKV-RNA detection of the cobas assay was 4.76 [CI95%: 3.08-8.94] IU/mL. DISCUSSION The two NAT assays developed for blood donor screening evaluated in this study demonstrated high and similar analytical performance. Subject to an appropriate risk-benefit assessment, they can be used to support blood safety during outbreaks in endemic areas or in non-endemic areas as an alternative to deferring blood donors during local transmission likely to affect the blood supply. The development of multiplex assays is expected to optimize laboratory organization.
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Affiliation(s)
- Pierre Gallian
- Etablissement Français du Sang, La Plaine Saint Denis, France
- Unité des Virus Emergents (UVE: Aix-Marseille Univ-IRD 190-Inserm 1207), Marseille, France
| | | | | | - Nadège Brisbarre
- Unité des Virus Emergents (UVE: Aix-Marseille Univ-IRD 190-Inserm 1207), Marseille, France
- Etablissement Français du Sang Provence Alpes Côte d'Azur et Corse, Marseille, France
| | - Christine Isnard
- Unité des Virus Emergents (UVE: Aix-Marseille Univ-IRD 190-Inserm 1207), Marseille, France
- Etablissement Français du Sang Provence Alpes Côte d'Azur et Corse, Marseille, France
| | - Idriss Delouane
- Établissement français du sang, La Réunion-Océan Indien. St-Denis, Réunion, France
| | - Pascale Richard
- Etablissement Français du Sang, La Plaine Saint Denis, France
| | - Pascal Morel
- Etablissement Français du Sang, La Plaine Saint Denis, France
| | - Syria Laperche
- Etablissement Français du Sang, La Plaine Saint Denis, France
| | - Xavier de Lamballerie
- Unité des Virus Emergents (UVE: Aix-Marseille Univ-IRD 190-Inserm 1207), Marseille, France
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Douchet L, Menkes C, Herbreteau V, Larrieu J, Bador M, Goarant C, Mangeas M. Climate-driven models of leptospirosis dynamics in tropical islands from three oceanic basins. PLoS Negl Trop Dis 2024; 18:e0011717. [PMID: 38662800 DOI: 10.1371/journal.pntd.0011717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 05/07/2024] [Accepted: 04/05/2024] [Indexed: 05/08/2024] Open
Abstract
BACKGROUND Leptospirosis is a neglected zoonosis which remains poorly known despite its epidemic potential, especially in tropical islands where outdoor lifestyle, vulnerability to invasive reservoir species and hot and rainy climate constitute higher risks for infections. Burden remains poorly documented while outbreaks can easily overflow health systems of these isolated and poorly populated areas. Identification of generic patterns driving leptospirosis dynamics across tropical islands would help understand its epidemiology for better preparedness of communities. In this study, we aim to model leptospirosis seasonality and outbreaks in tropical islands based on precipitation and temperature indicators. METHODOLOGY/PRINCIPAL FINDINGS We adjusted machine learning models on leptospirosis surveillance data from seven tropical islands (Guadeloupe, Reunion Island, Fiji, Futuna, New Caledonia, and Tahiti) to investigate 1) the effect of climate on the disease's seasonal dynamic, i.e., the centered seasonal profile and 2) inter-annual anomalies, i.e., the incidence deviations from the seasonal profile. The model was then used to estimate seasonal dynamics of leptospirosis in Vanuatu and Puerto Rico where disease incidence data were not available. A robust model, validated across different islands with leave-island-out cross-validation and based on current and 2-month lagged precipitation and current and 1-month lagged temperature, can be constructed to estimate the seasonal dynamic of leptospirosis. In opposition, climate determinants and their importance in estimating inter-annual anomalies highly differed across islands. CONCLUSIONS/SIGNIFICANCE Climate appears as a strong determinant of leptospirosis seasonality in tropical islands regardless of the diversity of the considered environments and the different lifestyles across the islands. However, predictive and expandable abilities from climate indicators weaken when estimating inter-annual outbreaks and emphasize the importance of these local characteristics in the occurrence of outbreaks.
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Affiliation(s)
- Léa Douchet
- ENTROPIE, IRD, Univ Reunion, CNRS, IFREMER, Univ Nouvelle Calédonie, Nouméa, New Caledonia
- ESPACE-DEV, IRD, Univ Montpellier, Univ. Antilles, Univ Guyane, Univ Réunion, Phnom Penh, Cambodia
| | - Christophe Menkes
- ENTROPIE, IRD, Univ Reunion, CNRS, IFREMER, Univ Nouvelle Calédonie, Nouméa, New Caledonia
| | - Vincent Herbreteau
- ESPACE-DEV, IRD, Univ Montpellier, Univ. Antilles, Univ Guyane, Univ Réunion, Phnom Penh, Cambodia
- Institut Pasteur du Cambodge, Epidemiology and Public Health Unit, Phnom Penh, Cambodia
| | - Joséphine Larrieu
- ENTROPIE, IRD, Univ Reunion, CNRS, IFREMER, Univ Nouvelle Calédonie, Nouméa, New Caledonia
| | - Margot Bador
- CECI Université de Toulouse, CERFACS/CNRS, Toulouse, France
| | - Cyrille Goarant
- Institut Pasteur in New Caledonia, Leptospirosis Research and Expertise Unit, Nouméa, New Caledonia
- Public Health Division, The Pacific Community, Nouméa, New Caledonia
| | - Morgan Mangeas
- ENTROPIE, IRD, Univ Reunion, CNRS, IFREMER, Univ Nouvelle Calédonie, Nouméa, New Caledonia
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Diarra YM, Maillard O, Vague A, Guihard B, Gérardin P, Bertolotti A. Diagnostic performance of the WHO definition of probable dengue within the first 5 days of symptoms on Reunion Island. PLoS One 2024; 19:e0295260. [PMID: 38358967 PMCID: PMC10868786 DOI: 10.1371/journal.pone.0295260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Accepted: 11/16/2023] [Indexed: 02/17/2024] Open
Abstract
The relevance of the World Health Organization (WHO) criteria for defining probable dengue had not yet been evaluated in the context of dengue endemicity on Reunion Island. The objective of this retrospective diagnostic study was to evaluate the diagnostic performance of the 2009 WHO definition of probable dengue and to propose an improvement thereof. From the medical database, we retrieved the data of subjects admitted to the emergency department of the University Hospital of Reunion Island in 2019 with suspected dengue fever (DF) within a maximum of 5 days post symptom onset, and whose diagnosis was confirmed by a Reverse Transcriptase Polymerase Chain Reaction (RT-PCR). The intrinsic characteristics of probable dengue definitions were reported in terms of sensitivity, specificity, positive and negative likelihood ratios (LR+ and LR-), using RT-PCR as the gold standard. Of the 1,181 subjects who exhibited a positive RT-PCR, 652 (55%) were classified as probable dengue. The WHO definition of probable dengue yielded a sensitivity of 64% (95%CI 60-67%), a specificity of 57% (95%CI 52-61%), a LR+ of 1.49 (95%CI 1.33-1.67), and a LR- of 0.63 (95%CI 0.56-0.72). The sensitivity and LR- for diagnosing and ruling out probable dengue could be improved by the addition of lymphopenia on admission (74% [95%CI: 71-78%] and 0.54 [95%CI: 0.46-0.63] respectively), at the cost of slight reductions of specificity and LR+ (48% [95%CI: 44-53%] and 1.42 [95%CI: 1.29-1.57], respectively). In the absence of, or when rapid diagnostic testing is unreliable, the use of the improved 2009 WHO definition of probable dengue could facilitate the identification of subjects who require further RT-PCR testing, which should encourage the development of patient management, while also optimizing the count and quarantine of cases, and guiding disease control.
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Affiliation(s)
- Yves Marie Diarra
- UMR Processus Infectieux en Milieux Insulaire Tropical (CNRS 9192, INSERM U1187, IRD 249, Université de La Réunion), Sainte Clotilde, La Réunion, France
- INSERM, CIC 1410, Centre Hospitalier Universitaire Réunion, Saint-Pierre, La Réunion, France
| | - Olivier Maillard
- INSERM, CIC 1410, Centre Hospitalier Universitaire Réunion, Saint-Pierre, La Réunion, France
| | - Adrien Vague
- Service d’Accueil des Urgences, Centre Hospitalier Universitaire Réunion, Saint-Pierre, La Réunion, France
| | - Bertrand Guihard
- Service d’Aide Médicale Urgente, Centre Hospitalier Universitaire Réunion, Saint-Denis, France
| | - Patrick Gérardin
- INSERM, CIC 1410, Centre Hospitalier Universitaire Réunion, Saint-Pierre, La Réunion, France
| | - Antoine Bertolotti
- INSERM, CIC 1410, Centre Hospitalier Universitaire Réunion, Saint-Pierre, La Réunion, France
- Service des Maladies Infectieuses - Dermatologie, Centre Hospitalier Universitaire Réunion, Saint Pierre, La Réunion, France
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Mbu-Nyamsi D, Vincent M, Perez-Fontana M, Best AL, Mesnard C, Villeroy F, Foucher A, Raffray L, Terrier CSP, Bertolotti A. Ophthalmic complications during the dengue epidemic in Reunion Island in 2020: a case series and review of the literature. BMC Infect Dis 2023; 23:506. [PMID: 37528344 PMCID: PMC10394947 DOI: 10.1186/s12879-023-08432-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Accepted: 06/28/2023] [Indexed: 08/03/2023] Open
Abstract
INTRODUCTION Dengue is an arboviral disease transmitted by the dengue virus, whose vectors are Aedes aegypti and Aedes albopictus. The acute phase with its cohort of well-known symptoms is usually spontaneously favorable. Since 2020 in Reunion Island, a new symptom has appeared: the ocular damage of dengue fever, which has already been described in South Asia and South-East Asia. We therefore decided to describe the clinical, biological, ophthalmological, therapeutic, and outcomes of patients with ocular manifestations during dengue fever in Reunion Island in 2020. PATIENTS AND METHODS This was a retrospective observational study. Patients were included from January 2020 to August 2020 and then reassessed by teleconsultation 1 year later. The patients were identified from the French public health surveillance network by all ophthalmologists on the island. Medical data were collected directly from medical records. RESULTS Twenty-eight patients were included. The mean age was 41.9 years. Ocular involvement occurred approximately 9.2 days after the onset of dengue symptoms. The main symptoms were scotoma (71.4%) and sudden decrease of visual acuity (39.2%). Eighteen patients (64.2%) had macular involvement. Fourteen patients were treated with oral or intravenous corticosteroids. Twenty-two (78.5%) patients were evaluated by telephone one year later. Scotoma and decreased visual acuity persisted in 15 patients. Thirteen patients (59%) were bothered by night driving, 32% of patients had reading difficulties and 27% of patients became sensitive to prolonged exposure to screens. CONCLUSION Ocular complications of dengue require early and collegial management to limit the risk of long-term sequelae. Further studies on the characteristics and complications of dengue fever are needed to better understand this disease.
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Affiliation(s)
- Digé Mbu-Nyamsi
- Département de maladies infectieuses-médecine interne-dermatologie, CHU de La Réunion, Saint Pierre, La Réunion, France
| | - Muriel Vincent
- Santé Publique France, Océan Indien, Saint Denis, La Réunion, France
| | | | - Anne-Laurence Best
- Département d'ophtalmologie, CHU de La Réunion, Saint Pierre, La Réunion, France
| | - Charles Mesnard
- Département d'ophtalmologie, CHOR, Saint Paul, La Réunion, France
| | - Fréderic Villeroy
- Département d'ophtalmologie, CHU de La Réunion, Saint Denis, La Réunion, France
| | - Aurélie Foucher
- Département de maladies infectieuses-médecine interne-dermatologie, CHU de La Réunion, Saint Pierre, La Réunion, France
| | - Loic Raffray
- Département de médecine interne, CHU de La Réunion, Saint Denis, La Réunion, France
- Unité Mixte de Recherche Processus Infectieux en Milieu Insulaire Tropical (PIMIT), Université de La Réunion, INSERM UMR 1187, CNRS 9192, IRD 249, Plateforme CYROI, Sainte Clotilde, La Réunion, France
| | - Cécile Saint-Pastou Terrier
- Département de maladies infectieuses-médecine interne-dermatologie, CHU de La Réunion, Saint Pierre, La Réunion, France
| | - Antoine Bertolotti
- Département de maladies infectieuses-médecine interne-dermatologie, CHU de La Réunion, Saint Pierre, La Réunion, France.
- CHU de La Réunion, CIC-INSERM1410, Saint Pierre, La Réunion, France.
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Vincent M, Paty MC, Gerardin P, Balleydier E, Etienne A, Daoudi J, Thouillot F, Jaffar-Bandjee MC, Menudier L. From dengue outbreaks to endemicity: Reunion Island, France, 2018 to 2021. Euro Surveill 2023; 28:2200769. [PMID: 37470738 PMCID: PMC10360367 DOI: 10.2807/1560-7917.es.2023.28.29.2200769] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Accepted: 03/07/2023] [Indexed: 07/21/2023] Open
Abstract
BackgroundAfter 40 years of limited viral circulation, Reunion Island has since 2018 experienced recurrent dengue outbreaks of increasing intensity and severity.AimWe aimed to report on the epidemiology and characteristics of dengue in Reunion Island between 2018 and 2021.MethodsBetween 2018 and August 2021, we systematically collected data on dengue cases via an automated transmission system between the health authorities and the medical laboratories. We set up additional surveillance systems for dengue-related activity in primary care, in emergency departments and in inpatient departments.ResultsUntil 2020, despite numerous cases, outbreaks had a limited public health impact because of few severe cases, low lethality and no heavy burden for the health care system. In 2021, however, the number of severe cases increased (from 0.4% of all cases in 2018 to 0.8% in 2021), as did the number of paediatric cases (from 8% in 2018 to 15% in 2021) and atypical clinical forms of dengue (108 cases of post-dengue maculopathy). Of note, haemorrhagic forms were rare and multi-organ failure was the most frequent severity throughout the study period. In parallel, the dominant serotype switched from DENV2 to DENV1 in 2020 and DENV1 became the only serotype detected in 2021.ConclusionThese findings indicate that dengue is becoming endemic in Reunion Island. Since comorbidities associated with severity of dengue are common in the population, health authorities should carefully consider the impact of dengue when addressing public health policies.
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Affiliation(s)
| | | | | | | | | | - Jamel Daoudi
- Santé Publique France, Saint Denis, Réunion, France
| | - Fabian Thouillot
- Service de Lutte Anti-Vectorielle, ARS Réunion, Saint Denis, Réunion, France
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Lamy K, Tran A, Portafaix T, Leroux MD, Baldet T. Impact of regional climate change on the mosquito vector Aedes albopictus in a tropical island environment: La Réunion. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 875:162484. [PMID: 36889019 DOI: 10.1016/j.scitotenv.2023.162484] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 02/22/2023] [Accepted: 02/22/2023] [Indexed: 06/18/2023]
Abstract
The recent expansion of Aedes albopictus across continents in both tropical and temperate regions and the exponential growth of dengue cases over the past 50 years represent a significant risk to human health. Although climate change is not the only factor responsible for the increase and spread of dengue cases worldwide, it might increase the risk of disease transmission at global and regional scale. Here we show that regional and local variations in climate can induce differential impacts on the abundance of Ae. albopictus. We use the instructive example of Réunion Island with its varied climatic and environmental conditions and benefiting from the availability of meteorological, climatic, entomological and epidemiological data. Temperature and precipitation data based on regional climate model simulations (3 km × 3 km) are used as inputs to a mosquito population model for three different climate emission scenarios. Our objective is to study the impact of climate change on the life cycle dynamics of Ae. albopictus in the 2070-2100 time horizon. Our results show the joint influence of temperature and precipitation on Ae. albopictus abundance as a function of elevation and geographical subregion. At low-elevations areas, decreasing precipitation is expected to have a negative impact on environmental carrying capacity and, consequently, on Ae. albopictus abundance. At mid- and high-elevations, decreasing precipitation is expected to be counterbalanced by a significant warming, leading to faster development rates at all life stages, and consequently increasing the abundance of this important dengue vector in 2070-2100.
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Affiliation(s)
- K Lamy
- LACy, Laboratoire de l'Atmosphère et des Cyclones (UMR 8105 CNRS, Université de La Réunion, Météo-France), Saint-Denis de La Réunion, France.
| | - A Tran
- CIRAD, UMR TETIS, Sainte-Clotilde, La Réunion, France
| | - T Portafaix
- LACy, Laboratoire de l'Atmosphère et des Cyclones (UMR 8105 CNRS, Université de La Réunion, Météo-France), Saint-Denis de La Réunion, France
| | - M D Leroux
- Météo-France, Direction Interrégionale pour l'Océan Indien, Saint-Denis de La Réunion, France
| | - T Baldet
- ASTRE, Univ. Montpellier, Cirad, INRA, Sainte-Clotilde, La Réunion, France
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Besnard O, Maillard O, Franco JM, Lebreton N, Reix G, Legrand F, Bertolotti A, Leruste S. Hydration and clinical warning signs of Dengue fever in primary care: an observational prospective study. Infect Dis Now 2023; 53:104708. [PMID: 37054972 DOI: 10.1016/j.idnow.2023.104708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 03/16/2023] [Accepted: 04/01/2023] [Indexed: 04/15/2023]
Abstract
OBJECTIVES Dengue fever is an arbovirosis expanding worldwide, for which hydration has been reported to reduce the risk of hospitalization. Our objective was to estimate the volume of hydration in Reunionese patients with dengue. METHODS A prospective observational study included patients presenting with a 'dengue-like' syndrome in ambulatory care. General practitioners recruited patients during consultation, and beverage consumption over the previous 24 hours was reported at two different times. Warning signs were defined according to the 2009 WHO guidelines. RESULTS GPs included 174 patients from April to July 2019. Average oral hydration volume was 1863 mL and 1944 mL, at the 1st and 2nd medical consultations, respectively. Water was the most wide consumed liquid. Drinking at least 5 glasses of liquid was significantly associated with fewer clinical warning signs at the 1st medical consultation (p = 0.044). CONCLUSIONS Sufficient hydration volume could prevent dengue warning signs. Further studies with standardized measurement of hydration would be needed.
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Affiliation(s)
- O Besnard
- Université de La Réunion - UFR Santé - Département universitaire de médecine générale, Site de l'IES, CHU de La Réunion, Saint-Pierre, France
| | - O Maillard
- INSERM, CIC1410, CHU de La Réunion, Saint-Pierre, Frances.
| | - J-M Franco
- Université de La Réunion - UFR Santé - Département universitaire de médecine générale, Site de l'IES, CHU de La Réunion, Saint-Pierre, France; INSERM, CIC1410, CHU de La Réunion, Saint-Pierre, Frances
| | - N Lebreton
- Université de La Réunion - UFR Santé - Département universitaire de médecine générale, Site de l'IES, CHU de La Réunion, Saint-Pierre, France
| | - G Reix
- Université de La Réunion - UFR Santé - Département universitaire de médecine générale, Site de l'IES, CHU de La Réunion, Saint-Pierre, France
| | - F Legrand
- Université de La Réunion - UFR Santé - Département universitaire de médecine générale, Site de l'IES, CHU de La Réunion, Saint-Pierre, France; Institut de Recherche pour le Développement - Ceped - UMR 196, Université de Paris, 45, rue des Saint-Pères, 75006 Paris, France
| | - A Bertolotti
- INSERM, CIC1410, CHU de La Réunion, Saint-Pierre, Frances; CHU de La Réunion, Service de maladies infectieuses-médecine interne-dermatologie, Saint Pierre, France
| | - S Leruste
- Université de La Réunion - UFR Santé - Département universitaire de médecine générale, Site de l'IES, CHU de La Réunion, Saint-Pierre, France; INSERM, CIC1410, CHU de La Réunion, Saint-Pierre, Frances
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10
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Maillard O, Belot J, Adenis T, Rollot O, Adenis A, Guihard B, Gérardin P, Bertolotti A. Early diagnosis of dengue: Diagnostic utility of the SD BIOLINE Dengue Duo rapid test in Reunion Island. PLoS Negl Trop Dis 2023; 17:e0011253. [PMID: 36996260 PMCID: PMC10089357 DOI: 10.1371/journal.pntd.0011253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 04/11/2023] [Accepted: 03/20/2023] [Indexed: 04/01/2023] Open
Abstract
BACKGROUND In Reunion Island, dengue outbreaks have been occurring since 2018. The healthcare facilities are facing the problem of managing a massive influx of patients and a growing care burden. The aim of this study was to evaluate the performance of the SD Bioline Dengue Duo rapid diagnostic test in adults consulting at an emergency department during the 2019 epidemic. METHODOLOGY/PRINCIPAL FINDINGS This retrospective study of diagnostic accuracy included patients over 18 years old, suspected of dengue, who were admitted to emergency units of the University Hospital of Reunion between the 1st of January and 30th of June, 2019, and were tested for dengue fever with the SD Bioline Dengue Duo rapid diagnostic test and reverse transcriptase polymerase chain reaction. Over the study period, 2099 patients were screened retrospectively. Of them, 671 patients matched the inclusion criteria. The overall rapid diagnostic test performance was 42% for sensitivity and 15% for specificity. The non-structural 1 antigen component had a good specificity of 82% but a low sensitivity of 12%. The immunoglobulin M component had a sensitivity of 28% and a specificity of 33%. Sensitivities were slightly improved beyond the 5th day of illness compared to the early stage for all components, but only the non-structural 1 antigen component had a better specificity of 91%. Furthermore, predictive values were low and post-test probabilities never improved pre-test probabilities in our setting. CONCLUSIONS/SIGNIFICANCE These results suggest that the SD Bioline Dengue Duo RDT did not achieve sufficient performance levels to rule in, or discard, an early point of care dengue diagnosis in the emergency department during the 2019 epidemic in Reunion.
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Affiliation(s)
- Olivier Maillard
- Department of Public Health and Research, CHU Réunion, Saint-Pierre, Reunion, France
- Clinical Investigation Center, INSERM CIC1410, CHU Réunion, Saint Pierre, Reunion, France
| | - Jeanne Belot
- Department of Emergency Medicine, CHU Réunion, Saint-Pierre, Reunion, France
| | - Thibault Adenis
- Department of Emergency Medicine, CHU Réunion, Saint-Pierre, Reunion, France
| | - Olivier Rollot
- Department of Public Health and Research, CHU Réunion, Saint-Pierre, Reunion, France
- Clinical Investigation Center, INSERM CIC1410, CHU Réunion, Saint Pierre, Reunion, France
| | - Antoine Adenis
- Department of Public Health and Research, CH Andrée Rosemon, Cayenne, French Guiana, France
- Clinical Investigation Center, INSERM CIC1424, CH Andrée Rosemon, Cayenne, French Guiana, France
| | - Bertrand Guihard
- Department of Emergency Medicine, CHU Réunion, Saint Denis, Reunion, France
| | - Patrick Gérardin
- Department of Public Health and Research, CHU Réunion, Saint-Pierre, Reunion, France
- Clinical Investigation Center, INSERM CIC1410, CHU Réunion, Saint Pierre, Reunion, France
| | - Antoine Bertolotti
- Clinical Investigation Center, INSERM CIC1410, CHU Réunion, Saint Pierre, Reunion, France
- Department of Infectious Diseases and Dermatology, CHU Réunion, Saint-Pierre, Reunion, France
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11
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Maillard O, Hirschinger D, Bénéteau S, Koumar Y, Vague A, Girerd R, DiAscia L, Jabot J, Cousty J, Randrianjohany A, Bertolotti A, Raffray L. C-reactive protein: An easy marker for early differentiation between leptospirosis and dengue fever in endemic area. PLoS One 2023; 18:e0285900. [PMID: 37195992 DOI: 10.1371/journal.pone.0285900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Accepted: 05/04/2023] [Indexed: 05/19/2023] Open
Abstract
In tropical regions, leptospirosis and dengue fever (DF) are infectious diseases of epidemiological importance and have overlapping symptomatic features. The objective of this study was to identify the factors associated to diagnosing leptospirosis that differentiate it to DF at the initial hospital evaluation. A multicenter retrospective study was conducted comparing confirmed leptospirosis to DF cases. Clinical/laboratory findings were compiled at hospital admission on Reunion Island between 2018 and 2019. Multivariable logistic regression was used to identify the predictors of leptospirosis. In total, 98 leptospirosis and 673 DF patients were included with a mean age of 47.8 (±17.1) and 48.9 (±23.3) years, respectively. In the multivariate analyses, the main parameters associated with leptospirosis were: i) increased neutrophil counts, ii) C-reactive protein values, iii) the absence of prolonged partial thromboplastin time, and iv) a decrease of platelets. The most discriminating parameter was C-reactive protein (CRP). With a threshold of 50mg/L, CRP taken alone had a sensitivity of 94% and a specificity of 93.5%. The positive and negative likelihood ratios were 14.5 and 0.06, respectively. In the setting of an early presumptive diagnosis, we found that an increased CRP value (>50 mg/L) could help diagnose leptospirosis and aid the decision process for hospital surveillance and/or a potential antibiotic treatment regimen.
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Affiliation(s)
- Olivier Maillard
- Department of Public Health and Research, CHU Réunion, Saint-Pierre, Reunion, France
- Clinical Investigation Center, INSERM CIC 1410, CHU Réunion, Saint-Pierre, Reunion, France
| | - David Hirschinger
- Department of Emergency Medicine, CHU Réunion, Saint-Denis, Reunion, France
| | - Samuel Bénéteau
- Department of Public Health and Research, CHU Réunion, Saint-Pierre, Reunion, France
| | - Yatrika Koumar
- Department of Infectious Diseases, CHU Réunion, Saint-Pierre, Reunion, France
| | - Adrien Vague
- Department of Emergency Medicine, CHU Réunion, Saint-Pierre, Reunion, France
| | - Rémi Girerd
- Department of Emergency Medicine, CHU Réunion, Saint-Pierre, Reunion, France
| | - Laura DiAscia
- Department of Emergency Medicine, CHU Réunion, Saint-Denis, Reunion, France
| | - Julien Jabot
- Intensive Care Unit, CHU Réunion, Saint-Denis, Reunion, France
| | - Julien Cousty
- Intensive Care Unit, CHU Réunion, Saint-Pierre, Reunion, France
| | - Andry Randrianjohany
- Department of Internal Medicine, Groupe Hospitalier Est Réunion, Saint-Benoit, Reunion, France
| | - Antoine Bertolotti
- Clinical Investigation Center, INSERM CIC 1410, CHU Réunion, Saint-Pierre, Reunion, France
- Department of Infectious Diseases, CHU Réunion, Saint-Pierre, Reunion, France
| | - Loïc Raffray
- Department of Internal Medicine, CHU Réunion, Saint-Denis, Reunion, France
- UMR Processus Infectieux en Milieu Insulaire Tropical (PIMIT), CNRS 9192, INSERM U1187, IRD 249, Université de La Réunion, Sainte-Clotilde, Reunion, France
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12
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Brouazin R, Claudel I, Lancelot R, Dupuy G, Gouagna LC, Dupraz M, Baldet T, Bouyer J. Optimization of oviposition trap settings to monitor populations of Aedes mosquitoes, vectors of arboviruses in La Reunion. Sci Rep 2022; 12:18450. [PMID: 36323764 PMCID: PMC9630495 DOI: 10.1038/s41598-022-23137-5] [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] [Subscribe] [Scholar Register] [Received: 08/20/2022] [Accepted: 10/25/2022] [Indexed: 11/05/2022] Open
Abstract
Several dengue epidemics recently occurred in La Reunion, an island harboring two dengue viruses (DVs) vectors: Aedes albopictus, and Ae. aegypti, the former being the main local DV vector. Aedes aegypti shows a peculiar ecology, compared to other tropical populations of the same species. This study aimed to provide researchers and public-health users with locally validated oviposition traps (ovitraps) to monitor Aedes populations. A field experiment was performed in Saint-Joseph to assess the effect of different settings on the detection probability and apparent density of Aedes mosquitoes. Black plastic ovitraps were identified as the best choice. Vacoa trees (Pandanus utilis) were the only observed breeding sites for Ae. aegypti, shared with Ae. albopictus. They were the experimental units in a Latin square design with three factors: trap position in the trees (ground vs canopy), oviposition surface in the trap (blotting paper vs. vacoa leaf), and addition of organic matter to the trap water. The latter factor was found unimportant. On the ground, Ae. aegypti eggs were only found with vacoa leaves as the oviposition surface. Their detection and apparent density increased when ovitraps were located in the tree canopy. The main factor for Ae. albopictus was the oviposition surface, with a preference for blotting paper. In all trap settings, their detection was close to 100%. Larval survival was lower for a high egg density, combined with blotting paper as the oviposition surface. When monitoring mixed Aedes populations in La Reunion, we recommend using black plastic ovitraps, placed at 1.50-to-2.00-m high in vacoa trees, with vacoa leaves as the oviposition surface.
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Affiliation(s)
- Ronan Brouazin
- UMR Mivegec (Maladies Infectieuses et Vecteurs: Écologie, Génétique, Évolution et Contrôle), IRD-CNRS-Univ. Montpellier, 97410, Saint-Pierre, La Réunion, France
| | - Iris Claudel
- UMR Mivegec (Maladies Infectieuses et Vecteurs: Écologie, Génétique, Évolution et Contrôle), IRD-CNRS-Univ. Montpellier, 97410, Saint-Pierre, La Réunion, France
| | - Renaud Lancelot
- UMR Astre (Animals, Health, Territories, Risks, Ecosystems), Cirad, Inrae, Univ. Montpellier, 34398, Montpellier, France
- Cirad, UMR Astre, 97491, Sainte Clotilde, La Réunion, France
| | - Guillaume Dupuy
- ARS Réunion, Service de Lutte Anti-Vectorielle, Saint-Denis, La Réunion, France
| | | | - Marlène Dupraz
- UMR Astre (Animals, Health, Territories, Risks, Ecosystems), Cirad, Inrae, Univ. Montpellier, 34398, Montpellier, France
- Cirad, UMR Astre, 97491, Sainte Clotilde, La Réunion, France
| | - Thierry Baldet
- UMR Astre (Animals, Health, Territories, Risks, Ecosystems), Cirad, Inrae, Univ. Montpellier, 34398, Montpellier, France
- Cirad, UMR Astre, 97491, Sainte Clotilde, La Réunion, France
| | - Jérémy Bouyer
- UMR Astre (Animals, Health, Territories, Risks, Ecosystems), Cirad, Inrae, Univ. Montpellier, 34398, Montpellier, France.
- Insect Pest Control Laboratory, Joint FAO/IAEA Programme of Nuclear Techniques in Food and Agriculture, IAEA Vienna, Wagramer Strasse 5, 1400, Vienna, Austria.
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13
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Buezo Montero S, Gabrieli P, Poinsignon A, Zamble BZH, Lombardo F, Remoue F, Arcà B. Human IgG responses to the Aedes albopictus 34k2 salivary protein: analyses in Réunion Island and Bolivia confirm its suitability as marker of host exposure to the tiger mosquito. Parasit Vectors 2022; 15:260. [PMID: 35858924 PMCID: PMC9301888 DOI: 10.1186/s13071-022-05383-8] [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] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Accepted: 07/06/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The rapid worldwide spreading of Aedes aegypti and Aedes albopictus is expanding the risk of arboviral diseases transmission, pointing out the urgent need to improve monitoring and control of mosquito vector populations. Assessment of human-vector contact, currently estimated by classical entomological methods, is crucial to guide planning and implementation of control measures and evaluate transmission risk. Antibody responses to mosquito genus-specific salivary proteins are emerging as a convenient complementary tool for assessing host exposure to vectors. We previously showed that IgG responses to the Ae. albopictus 34k2 salivary protein (al34k2) allow detection of seasonal and geographic variation of human exposure to the tiger mosquito in two temperate areas of Northeast Italy. The main aim of this study was to confirm and extend these promising findings to tropical areas with ongoing arboviral transmission. METHODS IgG responses to al34k2 and to the Ae. aegypti orthologous protein ae34k2 were measured by ELISA in cohorts of subjects only exposed to Ae. albopictus (Réunion Island), only exposed to Ae. aegypti (Bolivia) or unexposed to both these vectors (North of France). RESULTS AND CONCLUSION Anti-al34k2 IgG levels were significantly higher in sera of individuals from Réunion Island than in unexposed controls, indicating that al34k2 may be a convenient and reliable proxy for whole saliva or salivary gland extracts as an indicator of human exposure to Ae. albopictus. Bolivian subjects, exposed to bites of Ae. aegypti, carried in their sera IgG recognizing the Ae. albopictus al34k2 protein, suggesting that this salivary antigen can also detect, even though with low sensitivity, human exposure to Ae. aegypti. On the contrary, due to the high background observed in unexposed controls, the recombinant ae34k2 appeared not suitable for the evaluation of human exposure to Aedes mosquitoes. Overall, this study confirmed the suitability of anti-al34k2 IgG responses as a specific biomarker of human exposure to Ae. albopictus and, to a certain extent, to Ae. aegypti. Immunoassays based on al34k2 are expected to be especially effective in areas where Ae. albopictus is the main arboviral vector but may also be useful in areas where Ae. albopictus and Ae. aegypti coexist.
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Affiliation(s)
- Sara Buezo Montero
- Department of Public Health and Infectious Diseases, Division of Parasitology, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
- Present Address: Institute of Tropical Medicine, University of Tübingen, Wilhelmstrasse 27, 72074 Tübingen, Germany
| | - Paolo Gabrieli
- Department of Biosciences, University of Milan, Via Celoria 26, 20133 Milan, Italy
| | - Anne Poinsignon
- MIVEGEC, University of Montpellier, IRD, CNRS, 34000 Montpellier, France
| | | | - Fabrizio Lombardo
- Department of Public Health and Infectious Diseases, Division of Parasitology, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Franck Remoue
- MIVEGEC, University of Montpellier, IRD, CNRS, 34000 Montpellier, France
| | - Bruno Arcà
- Department of Public Health and Infectious Diseases, Division of Parasitology, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
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Gossner CM, Fournet N, Frank C, Fernández-Martínez B, Del Manso M, Gomes Dias J, de Valk H. Dengue virus infections among European travellers, 2015 to 2019. EURO SURVEILLANCE : BULLETIN EUROPEEN SUR LES MALADIES TRANSMISSIBLES = EUROPEAN COMMUNICABLE DISEASE BULLETIN 2022; 27. [PMID: 35027102 PMCID: PMC8759115 DOI: 10.2807/1560-7917.es.2022.27.2.2001937] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Background Dengue is a disease with major impacts on public health in tropical and subtropical countries. In Europe, in the past decade, few autochthonous outbreaks were described. Aim We aimed to identify factors associated with frequency of dengue virus infection among European travellers and at assessing how surveillance data could support preparedness against autochthonous outbreaks within Europe. Methods We performed a descriptive analysis of travel-related dengue cases reported by European countries from 2015 through 2019. Using flight passenger data, we calculated travellers’ infection rates (TIR). We investigated the following associations: (i) between TIR and incidence rate in selected countries of infection and (ii) between number of travel-related cases and occurrence of autochthonous outbreaks within Europe. Results There were 11,478 travel-related dengue cases and the TIR was 2.8 cases per 100,000 travellers. Most cases were infected in Asia (71%), predominantly in south-eastern Asia. The TIR was highest among travellers returning from Asia (6.1/100,000). There was an association between the incidence rate in the country of infection and the TIR but no association between the number of travel-related cases and occurrence of autochthonous outbreaks in Europe. Conclusions The likelihood of infection in travellers is a function of the ongoing epidemiological situation in the country of exposure. The number of travel-related cases alone is not sufficient to estimate the likelihood of autochthonous outbreaks where vectors are present in Europe. Additional contributing factors such as adequate vectorial capacity and suitable environmental conditions are required.
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Affiliation(s)
- Céline M Gossner
- European Centre for Disease Prevention and Control, Solna, Sweden
| | | | - Christina Frank
- Department for Infectious Disease Epidemiology, Robert Koch-Institut, Berlin, Germany
| | - Beatriz Fernández-Martínez
- Centro Nacional de Epidemiología & Spanish Consortium for Research in Epidemiology and Public Health, Instituto de Salud Carlos III, Madrid, Spain
| | | | - Joana Gomes Dias
- European Centre for Disease Prevention and Control, Solna, Sweden
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15
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Gérardin P, Maillard O, Bruneau L, Accot F, Legrand F, Poubeau P, Manaquin R, Andry F, Bertolotti A, Levin C. Differentiating COVID-19 and dengue from other febrile illnesses in co-epidemics: Development and internal validation of COVIDENGUE scores. Travel Med Infect Dis 2021; 45:102232. [PMID: 34896649 PMCID: PMC8656151 DOI: 10.1016/j.tmaid.2021.102232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 12/03/2021] [Accepted: 12/05/2021] [Indexed: 11/30/2022]
Abstract
OBJECTIVES The purpose of this cohort study was to develop two scores able to differentiate coronavirus 2019 (COVID-19) from dengue and other febrile illnesses (OFIs). METHODS All subjects suspected of COVID-19 who attended the SARS-CoV-2 testing center of Saint-Pierre hospital, Reunion, between March 23 and May 10, 2020, were assessed for identifying predictors of both infectious diseases from a multinomial logistic regression model. Two scores were developed after weighting the odd ratios then validated by bootstrapping. RESULTS Over 49 days, 80 COVID-19, 60 non-severe dengue and 872 OFIs were diagnosed. The translation of the best fit model yielded two scores composed of 11 criteria: contact with a COVID-19 positive case (+3 points for COVID-19; 0 point for dengue), return from travel abroad within 15 days (+3/-1), previous individual episode of dengue (+1/+3), active smoking (-3/0), body ache (0/+5), cough (0/-2), upper respiratory tract infection symptoms (-1/-1), anosmia (+7/-1), headache (0/+5), retro-orbital pain (-1/+5), and delayed presentation (>3 days) to hospital (+1/0). The area under the receiver operating characteristic curve was 0.79 (95%CI 0.76-0.82) for COVID-19 score and 0.88 (95%CI 0.85-0.90) for dengue score. Calibration was satisfactory for COVID-19 score and excellent for dengue score. For predicting COVID-19, sensitivity was 97% at the 0-point cut-off and specificity 99% at the 10-point cut-off. For predicting dengue, sensitivity was 97% at the 3-point cut-off and specificity 98% at the 11-point cut-off. CONCLUSIONS COVIDENGUE scores proved discriminant to differentiate COVID-19 and dengue from OFIs in the context of SARS-CoV-2 testing center during a co-epidemic.
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Affiliation(s)
- Patrick Gérardin
- Centre for Clinical Investigation - Clinical Epidemiology (CIC 1410), Institut National de la Santé et de la Recherche Médicale (INSERM), Centre Hospitalier Universitaire de La Réunion, Saint Pierre, Reunion.
| | - Olivier Maillard
- Centre for Clinical Investigation - Clinical Epidemiology (CIC 1410), Institut National de la Santé et de la Recherche Médicale (INSERM), Centre Hospitalier Universitaire de La Réunion, Saint Pierre, Reunion
| | - Léa Bruneau
- Department of Public Health and Research Support, Centre Hospitalier Universitaire de La Réunion, Saint Denis, Reunion
| | - Frédéric Accot
- COVID-19 Testing Centre, Centre Hospitalier Universitaire de La Réunion, Saint Pierre, Reunion
| | - Florian Legrand
- COVID-19 Testing Centre, Centre Hospitalier Universitaire de La Réunion, Saint Pierre, Reunion; City to Hospital Outpatient Clinic for the Care of COVID-19, Centre Hospitalier Universitaire de La Réunion, Saint Pierre, Reunion
| | - Patrice Poubeau
- COVID-19 Testing Centre, Centre Hospitalier Universitaire de La Réunion, Saint Pierre, Reunion; Department of Infectious Diseases and Tropical Medicine, Centre Hospitalier Universitaire de La Réunion, Saint Pierre, Reunion; City to Hospital Outpatient Clinic for the Care of COVID-19, Centre Hospitalier Universitaire de La Réunion, Saint Pierre, Reunion
| | - Rodolphe Manaquin
- COVID-19 Testing Centre, Centre Hospitalier Universitaire de La Réunion, Saint Pierre, Reunion; Department of Infectious Diseases and Tropical Medicine, Centre Hospitalier Universitaire de La Réunion, Saint Pierre, Reunion; City to Hospital Outpatient Clinic for the Care of COVID-19, Centre Hospitalier Universitaire de La Réunion, Saint Pierre, Reunion
| | - Fanny Andry
- COVID-19 Testing Centre, Centre Hospitalier Universitaire de La Réunion, Saint Pierre, Reunion; Department of Infectious Diseases and Tropical Medicine, Centre Hospitalier Universitaire de La Réunion, Saint Pierre, Reunion; City to Hospital Outpatient Clinic for the Care of COVID-19, Centre Hospitalier Universitaire de La Réunion, Saint Pierre, Reunion
| | - Antoine Bertolotti
- Centre for Clinical Investigation - Clinical Epidemiology (CIC 1410), Institut National de la Santé et de la Recherche Médicale (INSERM), Centre Hospitalier Universitaire de La Réunion, Saint Pierre, Reunion; COVID-19 Testing Centre, Centre Hospitalier Universitaire de La Réunion, Saint Pierre, Reunion; Department of Infectious Diseases and Tropical Medicine, Centre Hospitalier Universitaire de La Réunion, Saint Pierre, Reunion
| | - Cécile Levin
- COVID-19 Testing Centre, Centre Hospitalier Universitaire de La Réunion, Saint Pierre, Reunion; Department of Infectious Diseases and Tropical Medicine, Centre Hospitalier Universitaire de La Réunion, Saint Pierre, Reunion; City to Hospital Outpatient Clinic for the Care of COVID-19, Centre Hospitalier Universitaire de La Réunion, Saint Pierre, Reunion
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16
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Modelling arthropod active dispersal using Partial differential equations: the case of the mosquito Aedes albopictus. Ecol Modell 2021. [DOI: 10.1016/j.ecolmodel.2021.109658] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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17
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Cantillo JF, Puerta L. Mosquitoes: Important Sources of Allergens in the Tropics. FRONTIERS IN ALLERGY 2021; 2:690406. [PMID: 35387048 PMCID: PMC8974784 DOI: 10.3389/falgy.2021.690406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Accepted: 06/03/2021] [Indexed: 11/13/2022] Open
Abstract
There are more than 3,000 mosquito species. Aedes aegypti, Ae. communis, and C. quinquefasciatus are, among others, three of the most important mosquito allergen sources in the tropics, western, and industrialized countries. Several individuals are sensitized to mosquito allergens, but the epidemiological data indicates that the frequency of sensitization markedly differs depending on the geographical region. Additionally, the geographical localization of mosquito species has been affected by global warming and some mosquito species have invaded areas where they were not previously found, at the same time as other species have been displaced. This phenomenon has repercussions in the pathogenesis and the accuracy of the diagnosis of mosquito allergy. Allergic individuals are sensitized to mosquito allergens from two origins: saliva and body allergens. Exposure to saliva allergens occurs during mosquito bite and induces cutaneous allergic reactions. Experimental and clinical data suggest that body allergens mediate different manifestations of allergic reactions such as asthma and rhinitis. The most studied mosquito species is Ae. aegypti, from which four and five allergens of the saliva and body, respectively, have been reported. Many characterized allergens are homologs to arthropod-derived allergens, which cause strong cross-reactivity at the humoral and cellular level. The generalized use of whole body Ae. communis or C. quinquefasciatus extracts complicates the diagnosis of mosquito allergy because they have low concentration of saliva allergens and may result in poor diagnosis of the affected population when other species are the primary sensitizer. This review article discusses the current knowledge about mosquito allergy, allergens, cross-reactivity, and proposals of component resolved approaches based on mixtures of purified recombinant allergens to replace saliva-based or whole-body extracts, in order to perform an accurate diagnosis of allergy induced by mosquito allergen exposure.
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Affiliation(s)
- Jose Fernando Cantillo
- Institute for Immunological Research, University of Cartagena, Cartagena, Colombia
- Inmunotek, S.L., Madrid, Spain
| | - Leonardo Puerta
- Institute for Immunological Research, University of Cartagena, Cartagena, Colombia
- *Correspondence: Leonardo Puerta
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18
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Lefeuvre C, Apaire-Marchais V. Dengue, chikungunya et Zika, des arboviroses émergentes en France métropolitaine. ACTUALITES PHARMACEUTIQUES 2021. [DOI: 10.1016/j.actpha.2021.06.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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19
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Lecadieu A, Teysseyre L, Larsen K, Vidal C, Caron M, Traversier N, Aujoulat T, Allyn J, Allou N. Case Report: Transmission of Dengue Virus from a Deceased Donor to a Kidney Transplant Recipient Previously Infected by Dengue Virus. Am J Trop Med Hyg 2021; 104:2199-2201. [PMID: 33939641 DOI: 10.4269/ajtmh.21-0137] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 03/05/2021] [Indexed: 12/21/2022] Open
Abstract
Since 2018, a dengue epidemic has been ongoing in the French overseas department of Reunion Island, in the Indian Ocean, with more than 25,000 serologically confirmed cases. Currently, three dengue serotypes have been identified in Réunion Island (DENV-1, DENV-2, and DENV-3) progressing in the form of epidemic outbreaks. This arbovirus is mainly transmitted by mosquitoes of the genus Aedes and may be responsible for serious clinical forms. To date, very few cases of kidney transplant-related dengue virus infection have been described. Here we report the first case of severe dengue virus infection related to kidney transplantation from a patient previously infected with dengue. Testing for dengue fever with PCR search in donor's urine may help complete the pretransplant assessment in areas where this disease occurs.
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Affiliation(s)
- Arnaud Lecadieu
- 1Centre Hospitalier Universitaire Félix Guyon, réanimation Polyvalente, Allée des Topazes, 97400, Saint Denis, France
| | - Laura Teysseyre
- 1Centre Hospitalier Universitaire Félix Guyon, réanimation Polyvalente, Allée des Topazes, 97400, Saint Denis, France
| | - Kevin Larsen
- 1Centre Hospitalier Universitaire Félix Guyon, réanimation Polyvalente, Allée des Topazes, 97400, Saint Denis, France
| | - Charles Vidal
- 1Centre Hospitalier Universitaire Félix Guyon, réanimation Polyvalente, Allée des Topazes, 97400, Saint Denis, France
| | - Margot Caron
- 1Centre Hospitalier Universitaire Félix Guyon, réanimation Polyvalente, Allée des Topazes, 97400, Saint Denis, France
| | - Nicolas Traversier
- 2Centre Hospitalier Universitaire Félix Guyon, Service de Microbiologie, Allée des Topazes, 97400, Saint Denis, France
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- 3Centre Hospitalier Universitaire Félix Guyon, Service de Néphrologie, Allée des Topazes, 97400, Saint Denis, France
| | - Thomas Aujoulat
- 4Centre Hospitalier Universitaire Félix Guyon, Service de Réanimation de chirurgie cardio-thoracique, Allée des Topazes, 97400, Saint Denis, France
| | - Jérôme Allyn
- 1Centre Hospitalier Universitaire Félix Guyon, réanimation Polyvalente, Allée des Topazes, 97400, Saint Denis, France
| | - Nicolas Allou
- 1Centre Hospitalier Universitaire Félix Guyon, réanimation Polyvalente, Allée des Topazes, 97400, Saint Denis, France
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20
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Joubert A, Andry F, Bertolotti A, Accot F, Koumar Y, Legrand F, Poubeau P, Manaquin R, Gérardin P, Levin C. Distinguishing non severe cases of dengue from COVID-19 in the context of co-epidemics: A cohort study in a SARS-CoV-2 testing center on Reunion island. PLoS Negl Trop Dis 2021; 15:e0008879. [PMID: 33901185 PMCID: PMC8102001 DOI: 10.1371/journal.pntd.0008879] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 05/06/2021] [Accepted: 03/15/2021] [Indexed: 12/21/2022] Open
Abstract
Background As coronavirus 2019 (COVID-19) is spreading globally, several countries are handling dengue epidemics. As both infections are deemed to share similarities at presentation, it would be useful to distinguish COVID-19 from dengue in the context of co-epidemics. Hence, we performed a retrospective cohort study to identify predictors of both infections. Methodology/Principal findings All the subjects suspected of COVID-19 between March 23 and May 10, 2020, were screened for COVID-19 within the testing center of the University hospital of Saint-Pierre, Reunion island. The screening consisted in a questionnaire surveyed in face-to-face, a nasopharyngeal swab specimen for the Severe Acute Respiratory Syndrome Coronavirus-2 (SARS-CoV-2) reverse transcription polymerase chain-reaction and a rapid diagnostic orientation test for dengue. Factors independently associated with COVID-19 or with dengue were sought using multinomial logistic regression models, taking other febrile illnesses (OFIs) as controls. Adjusted Odds ratios (OR) and 95% Confidence Intervals (95%CI) were assessed. Over a two-month study period, we diagnosed 80 COVID-19, 61 non-severe dengue and 872 OFIs cases eligible to multivariate analysis. Among these, we identified delayed presentation (>3 days) since symptom onset (Odds ratio 1.91, 95% confidence interval 1.07–3.39), contact with a COVID-19 positive case (OR 3.81, 95%CI 2.21–6.55) and anosmia (OR 7.80, 95%CI 4.20–14.49) as independent predictors of COVID-19, body ache (OR 6.17, 95%CI 2.69–14.14), headache (OR 5.03, 95%CI 1.88–13.44) and retro-orbital pain (OR 5.55, 95%CI 2.51–12.28) as independent predictors of dengue, while smoking was less likely observed with COVID-19 (OR 0.27, 95%CI 0.09–0.79) and upper respiratory tract infection symptoms were associated with OFIs. Conclusions/Significance Although prone to potential biases, these data suggest that non-severe dengue may be more symptomatic than COVID-19 in a co-epidemic setting with higher dengue attack rates. At clinical presentation, nine basic clinical and epidemiological indicators may help to distinguish COVID-19 or dengue from each other and other febrile illnesses. As coronavirus 2019 (COVID-19) is spreading globally, several countries are facing dengue epidemics with the fear the two plagues might overburden their healthcare systems. On Reunion island, southwestern Indian ocean: dengue virus is circulating since 2004 under an endemo-epidemic pattern with yearly outbreaks peaking between March and May since 2015, whereas Severe Acute Respiratory Syndrome Coronavirus-2 (SARS-CoV-2), the pathogen responsible of COVID-19, emerged in March 2020, imported from the Bahamas. COVID-19 and dengue are deemed two clinically similar entities, especially within the first two days from symptom onset. In this context, we conducted a cohort study between March 23 and May 10, 2020, within a SARS-CoV-2 testing center, aimed at identifying the factors discriminating both infections. Surprisingly, we found that non-severe dengue was more symptomatic than mild to moderate COVID-19. Indeed, we found body ache, headache and retro-orbital pain to be indicative of dengue, whereas contact with a COVID-19 positive case, anosmia, delayed presentation (>3 days post symptom onset) and absence of active smoking were indicative of COVID-19. These findings highlight the need for accurate diagnostic tools and not to jeopardize dengue control in areas wherever COVID-19 dengue co-epidemics have the potential to wrought havoc to the healthcare system.
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Affiliation(s)
- Antoine Joubert
- COVID-19 testing center, Centre Hospitalier Universitaire de la Réunion, Saint Pierre, Reunion, France
| | - Fanny Andry
- COVID-19 testing center, Centre Hospitalier Universitaire de la Réunion, Saint Pierre, Reunion, France
- Department of Infectious Diseases and Tropical Medicine, Centre Hospitalier Universitaire de la Réunion, Saint Pierre, Reunion, France
- City to Hospital Outpatient Clinic for the care of COVID-19, Centre Hospitalier Universitaire de la Réunion, Saint Pierre, Reunion, France
| | - Antoine Bertolotti
- COVID-19 testing center, Centre Hospitalier Universitaire de la Réunion, Saint Pierre, Reunion, France
- Department of Infectious Diseases and Tropical Medicine, Centre Hospitalier Universitaire de la Réunion, Saint Pierre, Reunion, France
- Center for Clinical Investigation–Clinical Epidemiology (CIC 1410), Institut National de la Santé et de la Recherche Médicale (INSERM), Centre Hospitalier Universitaire de la Réunion, Saint Pierre, Reunion, France
| | - Frédéric Accot
- COVID-19 testing center, Centre Hospitalier Universitaire de la Réunion, Saint Pierre, Reunion, France
| | - Yatrika Koumar
- COVID-19 testing center, Centre Hospitalier Universitaire de la Réunion, Saint Pierre, Reunion, France
- Department of Infectious Diseases and Tropical Medicine, Centre Hospitalier Universitaire de la Réunion, Saint Pierre, Reunion, France
- City to Hospital Outpatient Clinic for the care of COVID-19, Centre Hospitalier Universitaire de la Réunion, Saint Pierre, Reunion, France
| | - Florian Legrand
- COVID-19 testing center, Centre Hospitalier Universitaire de la Réunion, Saint Pierre, Reunion, France
- City to Hospital Outpatient Clinic for the care of COVID-19, Centre Hospitalier Universitaire de la Réunion, Saint Pierre, Reunion, France
| | - Patrice Poubeau
- COVID-19 testing center, Centre Hospitalier Universitaire de la Réunion, Saint Pierre, Reunion, France
- Department of Infectious Diseases and Tropical Medicine, Centre Hospitalier Universitaire de la Réunion, Saint Pierre, Reunion, France
- City to Hospital Outpatient Clinic for the care of COVID-19, Centre Hospitalier Universitaire de la Réunion, Saint Pierre, Reunion, France
| | - Rodolphe Manaquin
- COVID-19 testing center, Centre Hospitalier Universitaire de la Réunion, Saint Pierre, Reunion, France
- Department of Infectious Diseases and Tropical Medicine, Centre Hospitalier Universitaire de la Réunion, Saint Pierre, Reunion, France
- City to Hospital Outpatient Clinic for the care of COVID-19, Centre Hospitalier Universitaire de la Réunion, Saint Pierre, Reunion, France
| | - Patrick Gérardin
- Center for Clinical Investigation–Clinical Epidemiology (CIC 1410), Institut National de la Santé et de la Recherche Médicale (INSERM), Centre Hospitalier Universitaire de la Réunion, Saint Pierre, Reunion, France
- * E-mail: (PG); (CL)
| | - Cécile Levin
- COVID-19 testing center, Centre Hospitalier Universitaire de la Réunion, Saint Pierre, Reunion, France
- Department of Infectious Diseases and Tropical Medicine, Centre Hospitalier Universitaire de la Réunion, Saint Pierre, Reunion, France
- City to Hospital Outpatient Clinic for the care of COVID-19, Centre Hospitalier Universitaire de la Réunion, Saint Pierre, Reunion, France
- * E-mail: (PG); (CL)
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21
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Douchet L, Haramboure M, Baldet T, L'Ambert G, Damiens D, Gouagna LC, Bouyer J, Labbé P, Tran A. Comparing sterile male releases and other methods for integrated control of the tiger mosquito in temperate and tropical climates. Sci Rep 2021; 11:7354. [PMID: 33795801 PMCID: PMC8016901 DOI: 10.1038/s41598-021-86798-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Accepted: 03/19/2021] [Indexed: 11/09/2022] Open
Abstract
The expansion of mosquito species worldwide is creating a powerful network for the spread of arboviruses. In addition to the destruction of breeding sites (prevention) and mass trapping, methods based on the sterile insect technique (SIT), the autodissemination of pyriproxyfen (ADT), and a fusion of elements from both of these known as boosted SIT (BSIT), are being developed to meet the urgent need for effective vector control. However, the comparative potential of these methods has yet to be explored in different environments. This is needed to propose and integrate informed guidelines into sustainable mosquito management plans. We extended a weather-dependent model of Aedes albopictus population dynamics to assess the effectiveness of these different vector control methods, alone or in combination, in a tropical (Reunion island, southwest Indian Ocean) and a temperate (Montpellier area, southern France) climate. Our results confirm the potential efficiency of SIT in temperate climates when performed early in the year (mid-March for northern hemisphere). In such a climate, the timing of the vector control action was the key factor in its success. In tropical climates, the potential of the combination of methods becomes more relevant. BSIT and the combination of ADT with SIT were twice as effective compared to the use of SIT alone.
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Affiliation(s)
- Léa Douchet
- CIRAD, UMR ASTRE, 97491, Sainte-Clotilde, Reunion, France
- ASTRE, CIRAD, INRAE, Univ Montpellier, Montpellier, France
| | - Marion Haramboure
- CIRAD, UMR ASTRE, 97491, Sainte-Clotilde, Reunion, France.
- ASTRE, CIRAD, INRAE, Univ Montpellier, Montpellier, France.
- ISEM, CNRS, IRD, EPHE, Université de Montpellier, Montpellier, France.
- TETIS, AgroParisTech, CIRAD, CNRS, INRAE, Univ Montpellier, Montpellier, France.
| | - Thierry Baldet
- CIRAD, UMR ASTRE, 97491, Sainte-Clotilde, Reunion, France
- ASTRE, CIRAD, INRAE, Univ Montpellier, Montpellier, France
| | - Gregory L'Ambert
- Department of Research and Development, EID Méditerranée, Montpellier, France
| | - David Damiens
- IRD, CNRS-UM-IRD, UMR MIVEGEC, Montpellier, Reunion, France
- IRD/GIP CYROI, Sainte-Clotilde, Reunion, France
| | - Louis Clément Gouagna
- IRD, CNRS-UM-IRD, UMR MIVEGEC, Montpellier, Reunion, France
- IRD/GIP CYROI, Sainte-Clotilde, Reunion, France
| | - Jeremy Bouyer
- ASTRE, CIRAD, INRAE, Univ Montpellier, Montpellier, France
- CIRAD, UMR ASTRE, 34398, Montpellier, France
- Insect Pest Control Laboratory, Joint FAO/IAEA Programme of Nuclear Techniques in Food and Agriculture, 1400, Vienna, Austria
- CIRAD, UMR ASTRE, 97410, Saint-Pierre, Reunion, France
| | - Pierrick Labbé
- ISEM, CNRS, IRD, EPHE, Université de Montpellier, Montpellier, France
| | - Annelise Tran
- CIRAD, UMR ASTRE, 97491, Sainte-Clotilde, Reunion, France
- ASTRE, CIRAD, INRAE, Univ Montpellier, Montpellier, France
- TETIS, AgroParisTech, CIRAD, CNRS, INRAE, Univ Montpellier, Montpellier, France
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22
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Mwanyika GO, Mboera LEG, Rugarabamu S, Ngingo B, Sindato C, Lutwama JJ, Paweska JT, Misinzo G. Dengue Virus Infection and Associated Risk Factors in Africa: A Systematic Review and Meta-Analysis. Viruses 2021; 13:536. [PMID: 33804839 PMCID: PMC8063827 DOI: 10.3390/v13040536] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 03/03/2021] [Accepted: 03/04/2021] [Indexed: 01/09/2023] Open
Abstract
Dengue contributes a significant burden on global public health and economies. In Africa, the burden of dengue virus (DENV) infection is not well described. This review was undertaken to determine the prevalence of dengue and associated risk factors. A literature search was done on PubMed/MEDLINE, Scopus, Embase, and Google Scholar databases to identify articles published between 1960 and 2020. Meta-analysis was performed using a random-effect model at a 95% confidence interval, followed by subgroup meta-analysis to determine the overall prevalence. Between 1960 and 2020, 45 outbreaks were identified, of which 17 and 16 occurred in East and West Africa, respectively. Dengue virus serotype 1 (DENV-1) and DENV-2 were the dominant serotypes contributing to 60% of the epidemics. Of 2211 cases reported between 2009 and 2020; 1954 (88.4%) were reported during outbreaks. Overall, the prevalence of dengue was 29% (95% CI: 20-39%) and 3% (95% CI: 1-5%) during the outbreak and non-outbreak periods, respectively. Old age (6/21 studies), lack of mosquito control (6/21), urban residence (4/21), climate change (3/21), and recent history of travel (3/21) were the leading risk factors. This review reports a high burden of dengue and increased risk of severe disease in Africa. Our findings provide useful information for clinical practice and health policy decisions to implement effective interventions.
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Affiliation(s)
- Gaspary O. Mwanyika
- SACIDS Africa Centre of Excellence for Infectious Diseases, Sokoine University of Agriculture, P.O. Box 3297 Morogoro, Tanzania; (G.O.M.); (L.E.G.M.); (S.R.); (B.N.); (C.S.)
- Department of Veterinary Microbiology, Parasitology and Biotechnology, Sokoine University of Agriculture, P.O. Box 3015 Morogoro, Tanzania
- Department of Health Science and Technology, Mbeya University of Science and Technology, P.O. Box 131 Mbeya, Tanzania
| | - Leonard E. G. Mboera
- SACIDS Africa Centre of Excellence for Infectious Diseases, Sokoine University of Agriculture, P.O. Box 3297 Morogoro, Tanzania; (G.O.M.); (L.E.G.M.); (S.R.); (B.N.); (C.S.)
| | - Sima Rugarabamu
- SACIDS Africa Centre of Excellence for Infectious Diseases, Sokoine University of Agriculture, P.O. Box 3297 Morogoro, Tanzania; (G.O.M.); (L.E.G.M.); (S.R.); (B.N.); (C.S.)
- Department of Veterinary Microbiology, Parasitology and Biotechnology, Sokoine University of Agriculture, P.O. Box 3015 Morogoro, Tanzania
- Department of Microbiology and Immunology, Muhimbili University of Health and Allied Sciences, P.O. Box 65595 Dar es Salaam, Tanzania
| | - Baraka Ngingo
- SACIDS Africa Centre of Excellence for Infectious Diseases, Sokoine University of Agriculture, P.O. Box 3297 Morogoro, Tanzania; (G.O.M.); (L.E.G.M.); (S.R.); (B.N.); (C.S.)
- Biology Department, St. John’s University of Tanzania, P.O. Box 47 Dodoma, Tanzania
| | - Calvin Sindato
- SACIDS Africa Centre of Excellence for Infectious Diseases, Sokoine University of Agriculture, P.O. Box 3297 Morogoro, Tanzania; (G.O.M.); (L.E.G.M.); (S.R.); (B.N.); (C.S.)
- Tabora Research Centre, National Institute for Medical Research, P.O. Box 482 Tabora, Tanzania
| | - Julius J. Lutwama
- Department of Arbovirology, Emerging and Re-emerging Infectious Diseases, Uganda Virus Research Institute, P.O. Box 49 Entebbe, Uganda;
| | - Janusz T. Paweska
- National Health Laboratory Service, National Institute for Communicable Diseases, Sandringham, 2192 Johannesburg, South Africa;
| | - Gerald Misinzo
- SACIDS Africa Centre of Excellence for Infectious Diseases, Sokoine University of Agriculture, P.O. Box 3297 Morogoro, Tanzania; (G.O.M.); (L.E.G.M.); (S.R.); (B.N.); (C.S.)
- Department of Veterinary Microbiology, Parasitology and Biotechnology, Sokoine University of Agriculture, P.O. Box 3015 Morogoro, Tanzania
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23
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Krol P, Coolen-Allou N, Teysseyre L, Traversier N, Beasley F, Nativel M, Allou N, Allyn J. Differential diagnoses of severe COVID-19 in tropical areas: the experience of Reunion Island. Trop Med Int Health 2021; 26:444-452. [PMID: 33354821 DOI: 10.1111/tmi.13542] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
OBJECTIVE To identify the differential diagnoses of severe COVID-19 and the distinguishing characteristics of critically ill COVID-19 patients in Reunion Island to help improve the triage and management of patients in this tropical setting. METHODS This retrospective observational study was conducted from 11 March to 4 May 2020 in the only intensive care unit (ICU) authorised to manage COVID-19 patients in Reunion Island, a French overseas department located in the Indian Ocean region. All patients with unknown COVID-19 status were tested by polymerase chain reaction (PCR) on ICU admission; those who tested negative were transferred to the COVID-19-free area of the ICU. RESULTS Over the study period, 99 patients were admitted to our ICU. A total of 33 patients were hospitalised in the COVID-19 isolation ward, of whom 11 were positive for COVID-19. The main differential diagnoses of severe COVID-19 were as follows: community-acquired pneumonia, dengue, leptospirosis causing intra-alveolar haemorrhage and cardiogenic pulmonary oedema. The median age of COVID-19-positive patients was higher than that of COVID-19-negative patients (71 [58-74] vs. 54 [46-63.5] years, P = 0.045). No distinguishing clinical, biological or radiological characteristics were found between the two groups of patients. All COVID-19-positive patients had recently travelled or been in contact with a recent traveller. CONCLUSIONS In Reunion Island, dengue and leptospirosis are key differential diagnoses of severe COVID-19, and travel is the only distinguishing characteristic of COVID-19-positive patients. Our findings apply only to the particular context of Reunion Island at this time of the epidemic.
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Affiliation(s)
- Pauline Krol
- Réanimation Polyvalente, Centre Hospitalier Universitaire Félix Guyon, La Réunion, France
| | - Nathalie Coolen-Allou
- Service de Pneumologie, Centre Hospitalier Universitaire Félix Guyon, La Réunion, France
| | - Laura Teysseyre
- Réanimation Polyvalente, Centre Hospitalier Universitaire Félix Guyon, La Réunion, France
| | - Nicolas Traversier
- Service de Virologie, Centre Hospitalier Universitaire Félix Guyon, La Réunion, France
| | - Floryan Beasley
- Réanimation Polyvalente, Centre Hospitalier Universitaire Félix Guyon, La Réunion, France
| | - Mathilde Nativel
- Réanimation Polyvalente, Centre Hospitalier Universitaire Félix Guyon, La Réunion, France
| | - Nicolas Allou
- Réanimation Polyvalente, Centre Hospitalier Universitaire Félix Guyon, La Réunion, France.,Département d'Informatique Clinique, Centre Hospitalier Universitaire Félix Guyon, La Réunion, France
| | - Jerome Allyn
- Réanimation Polyvalente, Centre Hospitalier Universitaire Félix Guyon, La Réunion, France.,Département d'Informatique Clinique, Centre Hospitalier Universitaire Félix Guyon, La Réunion, France
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24
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Bohers C, Mousson L, Madec Y, Vazeille M, Rhim A, M’ghirbi Y, Bouattour A, Failloux AB. The recently introduced Aedes albopictus in Tunisia has the potential to transmit chikungunya, dengue and Zika viruses. PLoS Negl Trop Dis 2020; 14:e0008475. [PMID: 33007002 PMCID: PMC7556531 DOI: 10.1371/journal.pntd.0008475] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 10/14/2020] [Accepted: 06/11/2020] [Indexed: 12/26/2022] Open
Abstract
The mosquito Aedes albopictus was detected for the first time in Tunisia in 2018. With its establishment in the capital city of Tunis, local health authorities fear the introduction of new human arboviral diseases, like what happened in Europe with unexpected local cases of chikungunya, dengue and Zika. Even though this mosquito is competent to transmit the arboviruses mentioned above, the transmission level will vary depending on the couple, mosquito population and virus genotype. Here, we assessed the vector competence of Ae. albopictus Tunisia by experimental infections with chikungunya (CHIKV), dengue (DENV), and Zika (ZIKV) viruses. We found that Ae. albopictus Tunisia was highly competent for CHIKV (transmission efficiency of 25% at 21 post-infection) and to a lesser extent, for ZIKV (8.7%) and DENV (8.3%). Virus was detected in mosquito saliva at day 3 (CHIKV), day 10 (ZIKV) and day 21 (DENV) post-infection. These results suggest that the risk of emergence of chikungunya is the highest imposing a more sustained surveillance to limit Ae. albopictus populations in densely populated urban dwellings and at the entry points of travelers returning from CHIKV-endemic regions.
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Affiliation(s)
- Chloé Bohers
- Institut Pasteur, Department of Virology, Arboviruses and Insect Vectors, Paris, France
| | - Laurence Mousson
- Institut Pasteur, Department of Virology, Arboviruses and Insect Vectors, Paris, France
| | - Yoann Madec
- Institut Pasteur, Department of Global Health, Epidemiology of Emerging Diseases, Paris, France
| | - Marie Vazeille
- Institut Pasteur, Department of Virology, Arboviruses and Insect Vectors, Paris, France
| | - Adel Rhim
- Laboratoire Virus, Vecteurs et Hôtes, Institut Pasteur de Tunis, Université de Tunis El Manar, Tunis-Belvédère, Tunisia
| | - Youmna M’ghirbi
- Laboratoire Virus, Vecteurs et Hôtes, Institut Pasteur de Tunis, Université de Tunis El Manar, Tunis-Belvédère, Tunisia
| | - Ali Bouattour
- Laboratoire Virus, Vecteurs et Hôtes, Institut Pasteur de Tunis, Université de Tunis El Manar, Tunis-Belvédère, Tunisia
| | - Anna-Bella Failloux
- Institut Pasteur, Department of Virology, Arboviruses and Insect Vectors, Paris, France
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25
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Buezo Montero S, Gabrieli P, Montarsi F, Borean A, Capelli S, De Silvestro G, Forneris F, Pombi M, Breda A, Capelli G, Arcà B. IgG Antibody Responses to the Aedes albopictus 34k2 Salivary Protein as Novel Candidate Marker of Human Exposure to the Tiger Mosquito. Front Cell Infect Microbiol 2020; 10:377. [PMID: 32850479 PMCID: PMC7405501 DOI: 10.3389/fcimb.2020.00377] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Accepted: 06/18/2020] [Indexed: 01/01/2023] Open
Abstract
Mosquitoes of the Aedes genus transmit arboviruses of great importance to human health as dengue, chikungunya, Zika and yellow fever. The tiger mosquito Aedes albopictus can play an important role as arboviral vector, especially when Aedes aegypti is absent or present at low levels. Remarkably, the rapid worldwide spreading of the tiger mosquito is expanding the risk of arboviral transmission also to temperate areas, and the autochthonous cases of chikungunya, dengue and Zika in Europe emphasize the need for improved monitoring and control. Proteomic and transcriptomic studies on blood feeding arthropod salivary proteins paved the way toward the exploitation of genus-specific mosquito salivary proteins for the development of novel tools to evaluate human exposure to mosquito bites. We previously found that the culicine-specific 34k2 salivary protein from Ae. albopictus (al34k2) evokes specific IgG responses in experimentally exposed mice, and provided preliminary evidence of its immunogenicity to humans. In this study we measured IgG responses to al34k2 and to Ae. albopictus salivary gland protein extracts (SGE) in individuals naturally exposed to the tiger mosquito. Sera were collected in two areas of Northeast Italy (Padova and Belluno) during two different time periods: at the end of the low- and shortly after the high-density mosquito seasons. Anti-SGE and anti-al34k2 IgG levels increased after the summer period of exposure to mosquito bites and were higher in Padova as compared to Belluno. An age-dependent decrease of anti-saliva IgG responses was found especially in Padova, an area with at least 25 years history of Ae. albopictus colonization. Moreover, a weak correlation between anti-saliva IgG levels and individual perception of mosquito bites by study participants was found. Finally, determination of anti-al34k2 IgG1 and IgG4 levels indicated a large predominance of IgG1 antibodies. Overall, this study provides a convincing indication that antibody responses to al34k2 may be regarded as a reliable candidate marker to detect temporal and/or spatial variation of human exposure to Ae. albopictus; a serological tool of this kind may prove useful both for epidemiological studies and to estimate the effectiveness of anti-vectorial measures.
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Affiliation(s)
- Sara Buezo Montero
- Division of Parasitology, Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy
| | - Paolo Gabrieli
- Department of Biology and Biotechnology "L. Spallanzani", University of Pavia, Pavia, Italy
| | - Fabrizio Montarsi
- Laboratory of Parasitology, Istituto Zooprofilattico Sperimentale delle Venezie, Legnaro, Italy
| | - Alessio Borean
- Department of Immunohematology and Transfusion Medicine, San Martino Hospital, Belluno, Italy
| | - Stefano Capelli
- Department of Immunohematology and Transfusion Medicine, San Martino Hospital, Belluno, Italy
| | | | - Federico Forneris
- Department of Biology and Biotechnology "L. Spallanzani", University of Pavia, Pavia, Italy
| | - Marco Pombi
- Division of Parasitology, Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy
| | - Antonio Breda
- Coordinamento Regionale Attività Trasfusionali (CRAT), Padova, Italy
| | - Gioia Capelli
- Laboratory of Parasitology, Istituto Zooprofilattico Sperimentale delle Venezie, Legnaro, Italy
| | - Bruno Arcà
- Division of Parasitology, Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy
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26
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Monge S, García-Ortúzar V, López Hernández B, Lopaz Pérez M, Delacour-Estrella S, Sánchez-Seco M, Fernández Martinez B, García San Miguel L, García-Fulgueiras A, Sierra Moros M. Characterization of the first autochthonous dengue outbreak in Spain (August-September 2018). Acta Trop 2020; 205:105402. [PMID: 32088276 DOI: 10.1016/j.actatropica.2020.105402] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Revised: 02/18/2020] [Accepted: 02/18/2020] [Indexed: 11/26/2022]
Abstract
On October 3rd 2018, dengue virus (DENV) infection was confirmed in three family members (symptoms onset between August 18th and 27th) without travel history outside of Spain. They had been together in the Autonomous Communities (AC) of Murcia and Andalusia. By the end of October, a second cluster of two dengue cases (symptoms onset on September 27th and 30th) was confirmed in the AC of Murcia. DENV type 1 sequence was identical to the first cluster, and the epidemiological link was a visit from a case of the first cluster to a fruit-farm neighboring the small village of residence of the second cluster. The entomological investigation found Aedes albopictus activity in this area although all mosquitoes were PCR-negative for DENV. This is the first autochthonous dengue outbreak identified in Spain. This outbreak highlights challenges to timely detect and respond to DENV transmission and opens questions on dengue dynamics in a non-endemic context.
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