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Tinto B, Bicaba B, Kagoné TS, Kayiwa J, Rabe I, Merle CSC, Zango A, Ayouba A, Salinas S, Kania D, Simonin Y. Co-circulation of two Alphaviruses in Burkina Faso: Chikungunya and O'nyong nyong viruses. PLoS Negl Trop Dis 2024; 18:e0011712. [PMID: 38870214 DOI: 10.1371/journal.pntd.0011712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Accepted: 06/01/2024] [Indexed: 06/15/2024] Open
Abstract
BACKGROUND Chikungunya virus (CHIKV) and O'nyong nyong virus (ONNV) are phylogenetically related alphaviruses in the Semliki Forest Virus (SFV) antigenic complex of the Togaviridae family. There are limited data on the circulation of these two viruses in Burkina Faso. The aim of our study was to assess their circulation in the country by determining seroprevalence to each of the viruses in blood donor samples and by retrospective molecular and serological testing of samples collected as part of national measles and rubella surveillance. METHODOLOGY/PRINCIPAL FINDINGS All blood donor samples were analyzed on the Luminex platform using CHIKV and ONNV E2 antigens. Patient samples collected during national measles-rubella surveillance were screened by an initial ELISA for CHIKV IgM (CHIKjj Detect IgM ELISA) at the national laboratory. The positive samples were then analyzed by a second ELISA test for CHIKV IgM (CDC MAC-ELISA) at the reference laboratory. Finally, samples that had IgM positive results for both ELISA tests and had sufficient residual volume were tested by plaque reduction neutralization testing (PRNT) for CHIKV and ONNV. These same patient samples were also analyzed by rRT-PCR for CHIKV. Among the blood donor specimens, 55.49% of the samples were positive for alphaviruses including both CHIKV and ONNV positive samples. Among patient samples collected as part of national measles and rubella surveillance, 3.09% were IgM positive for CHIKV, including 2.5% confirmed by PRNT. PRNT failed to demonstrate any ONNV infections in these samples. No samples tested by RT-qPCR. had detectable CHIKV RNA. CONCLUSIONS/SIGNIFICANCE Our results suggest that CHIKV and ONNV have been circulating in the population of Burkina Faso and may have been confused with malaria, dengue fever or other febrile diseases such as measles or rubella. Our study underscores the necessity to enhance arbovirus surveillance systems in Burkina Faso.
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Affiliation(s)
- Bachirou Tinto
- Pathogenesis and Control of Chronic and Emerging Infections, INSERM, University of Montpellier, Montpellier, France
- Centre MURAZ, Institut National de Santé Publique, Bobo-Dioulasso, Burkina Faso
| | - Brice Bicaba
- Centre des Opérations de Réponse aux Urgences Sanitaires, Ouagadougou, Burkina Faso
| | | | - John Kayiwa
- Uganda Virus Research Institute, Republic of Uganda
| | - Ingrid Rabe
- Special programme for research and training in Tropical disease (TDR), World Health Organization, Geneva, Switzerland
| | - Corinne Simone Collette Merle
- Special programme for research and training in Tropical disease (TDR), World Health Organization, Geneva, Switzerland
| | - Alidou Zango
- Centre MURAZ, Institut National de Santé Publique, Bobo-Dioulasso, Burkina Faso
| | - Ahidjo Ayouba
- Recherches translationnelles sur le VIH et maladies infectieuses, Université de Montpellier, IRD, Inserm, France
| | - Sara Salinas
- Pathogenesis and Control of Chronic and Emerging Infections, INSERM, University of Montpellier, Montpellier, France
| | - Dramane Kania
- Centre MURAZ, Institut National de Santé Publique, Bobo-Dioulasso, Burkina Faso
| | - Yannick Simonin
- Pathogenesis and Control of Chronic and Emerging Infections, INSERM, University of Montpellier, Montpellier, France
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Yang TH, Gao WC, Ma X, Liu Q, Pang PP, Zheng YT, Jia Y, Zheng CB. A Review on The Pathogenesis of Cardiovascular Disease of Flaviviridea Viruses Infection. Viruses 2024; 16:365. [PMID: 38543730 PMCID: PMC10974792 DOI: 10.3390/v16030365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2024] [Revised: 02/20/2024] [Accepted: 02/25/2024] [Indexed: 05/23/2024] Open
Abstract
Members of the Flaviviridae family, encompassing the Flavivirus and Hepacivirus genera, are implicated in a spectrum of severe human pathologies. These diseases span a diverse spectrum, including hepatitis, vascular shock syndrome, encephalitis, acute flaccid paralysis, and adverse fetal outcomes, such as congenital heart defects and increased mortality rates. Notably, infections by Flaviviridae viruses have been associated with substantial cardiovascular compromise, yet the exploration into the attendant cardiovascular sequelae and underlying mechanisms remains relatively underexplored. This review aims to explore the epidemiology of Flaviviridae virus infections and synthesize their cardiovascular morbidities. Leveraging current research trajectories and our investigative contributions, we aspire to construct a cogent theoretical framework elucidating the pathogenesis of Flaviviridae-induced cardiovascular injury and illuminate prospective therapeutic avenues.
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Affiliation(s)
- Tie-Hua Yang
- School of Chinese Materia Medica, Yunnan University of Chinese Medicine, Kunming 650500, China; (T.-H.Y.); (P.-P.P.)
- Key Laboratory of Animal Models and Human Diseases Mechanisms of Chinese Academy of Sciences, Center for Biosafety Mega-Science, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650201, China; (X.M.); (Y.-T.Z.)
- Engineering Laboratory of Peptides of Chinese Academy of Sciences, Key Laboratory of Bioactive Peptides of Yunnan Province, KIZ-CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases, Center for Biosafety Mega-Science, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, China
| | - Wen-Cong Gao
- School of Pharmaceutical Science and Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming 650500, China;
| | - Xin Ma
- Key Laboratory of Animal Models and Human Diseases Mechanisms of Chinese Academy of Sciences, Center for Biosafety Mega-Science, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650201, China; (X.M.); (Y.-T.Z.)
- College of Modern Biomedical Industry, Kunming Medical University, Kunming 650500, China
| | - Qian Liu
- School of Pharmacy, Chongqing Medical University, Chongqing 400016, China;
| | - Pan-Pan Pang
- School of Chinese Materia Medica, Yunnan University of Chinese Medicine, Kunming 650500, China; (T.-H.Y.); (P.-P.P.)
- Key Laboratory of Animal Models and Human Diseases Mechanisms of Chinese Academy of Sciences, Center for Biosafety Mega-Science, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650201, China; (X.M.); (Y.-T.Z.)
| | - Yong-Tang Zheng
- Key Laboratory of Animal Models and Human Diseases Mechanisms of Chinese Academy of Sciences, Center for Biosafety Mega-Science, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650201, China; (X.M.); (Y.-T.Z.)
- Engineering Laboratory of Peptides of Chinese Academy of Sciences, Key Laboratory of Bioactive Peptides of Yunnan Province, KIZ-CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases, Center for Biosafety Mega-Science, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, China
| | - Yinnong Jia
- School of Pharmaceutical Science and Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming 650500, China;
| | - Chang-Bo Zheng
- School of Pharmaceutical Science and Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming 650500, China;
- College of Modern Biomedical Industry, Kunming Medical University, Kunming 650500, China
- Yunnan Vaccine Laboratory, Kunming 650500, China
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3
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Manuel E, Armando A, Francisco M, Paixão J, Aramburu J, de Oliveira MDS, Freitas H, Pedro AM, Jandondo D, Carderon PB, Lamezon SL, Fortes F, Mariscal J, Cardoso Y, Moreira R, Morais J, Francisco NM. Assessment of the yellow fever outbreak in Angola from December 2015 through December 2016: A retrospective study. Health Sci Rep 2024; 7:e1924. [PMID: 38444843 PMCID: PMC10913757 DOI: 10.1002/hsr2.1924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 01/15/2024] [Accepted: 01/31/2024] [Indexed: 03/07/2024] Open
Abstract
Background and Aims The acute tropical infectious disease known as yellow fever (YF) is caused by an arbovirus and is characterized by fever, jaundice, hemorrhage, headache, muscle pain, nausea, vomiting, and fatigue. Angola experienced a yellow fever virus (YFV) outbreak that was documented in December 2015. However, little is known about the outcome of this outbreak. We aimed to demonstrate epidemic features and lessons learned during the YF epidemic in Angola. Methods A total of 4618 blood samples from suspected YF cases were sent to the Instituto Nacional de Investigação em Saúde (INIS), a national referral and public health laboratory, between December 5, 2015, and December 23, 2016. Sample analyses were conducted using enzyme-linked immunosorbent assay (ELISA) and reverse transcription polymerase chain reaction (RT-PCR) assays. Blood samples were sent from 16 out of the 18 provinces of Angola. Results We detected 884 (19.1%) cases that were positive for ELISA, which were confirmed by RT-PCR assay. Considering the positive cases, the incidence among male patients was around three times higher (n = 223; 10.9%) than in female patients (n = 59; 2.6%) in the 20-29 age group, followed by the age group 10-19 with n = 211 (6.8%) in males versus n = 108 (3.3%) in females; and the age group 30-39 had n = 68 (4.8%) in males versus n = 28 (1.8%) in females. The other groups had an incidence below 3.0%. The case fatality ratio for YF was in young adults in the age group 20-29 with n = 39 cases, followed by the age group 10-19 with n = 16 cases, and finally the age group 0-9 with n = 13 cases. The other age groups had several deaths by YF below 10 cases. Conclusions This study demonstrates features of the YF epidemic that occurred in Angola. Also, it demonstrates that YF causes deaths in young people but is preventable by high vaccine coverage. Thus, public health laboratory surveillance must be strengthened to reduce the possibility of emerging and re-emerging human infections.
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Affiliation(s)
- Eusebio Manuel
- Faculdade de MedicinaUniversidade Agostinho NetoLuandaAngola
- Direcção Nacional de Saúde PúblicaMinistério da SaúdeLuandaAngola
| | - António Armando
- Direcção Nacional de Saúde PúblicaMinistério da SaúdeLuandaAngola
| | - Moisés Francisco
- Grupo de Investigação Microbiana e ImunológicaInstituto Nacional de Investigação em Saúde (National Institute for Health Research)LuandaAngola
| | - Joana Paixão
- Grupo de Investigação Microbiana e ImunológicaInstituto Nacional de Investigação em Saúde (National Institute for Health Research)LuandaAngola
| | | | | | - Helga Freitas
- Direcção Nacional de Saúde PúblicaMinistério da SaúdeLuandaAngola
| | | | - Domingos Jandondo
- Grupo de Investigação Microbiana e ImunológicaInstituto Nacional de Investigação em Saúde (National Institute for Health Research)LuandaAngola
| | | | | | - Filomeno Fortes
- Instituto de Higiene e Medicina TropicalUniversidade Nova de LisboaLisboaPortugal
| | - Jorge Mariscal
- Direcção Nacional de Saúde PúblicaMinistério da SaúdeLuandaAngola
| | - Yolanda Cardoso
- Faculdade de MedicinaUniversidade Agostinho NetoLuandaAngola
| | - Rosa Moreira
- Direcção Nacional de Saúde PúblicaMinistério da SaúdeLuandaAngola
| | - Joana Morais
- Faculdade de MedicinaUniversidade Agostinho NetoLuandaAngola
- Grupo de Investigação Microbiana e ImunológicaInstituto Nacional de Investigação em Saúde (National Institute for Health Research)LuandaAngola
| | - Ngiambudulu M. Francisco
- Grupo de Investigação Microbiana e ImunológicaInstituto Nacional de Investigação em Saúde (National Institute for Health Research)LuandaAngola
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Poungou N, Sevidzem SL, Koumba AA, Koumba CRZ, Mbehang P, Onanga R, Zahouli JZB, Maganga GD, Djogbénou LS, Borrmann S, Adegnika AA, Becker SC, Mavoungou JF, Nguéma RM. Mosquito-Borne Arboviruses Occurrence and Distribution in the Last Three Decades in Central Africa: A Systematic Literature Review. Microorganisms 2023; 12:4. [PMID: 38276174 PMCID: PMC10819313 DOI: 10.3390/microorganisms12010004] [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: 09/19/2023] [Revised: 10/13/2023] [Accepted: 10/19/2023] [Indexed: 01/27/2024] Open
Abstract
Arboviruses represent a real public health problem globally and in the Central African subregion in particular, which represents a high-risk zone for the emergence and re-emergence of arbovirus outbreaks. Furthermore, an updated review on the current arbovirus burden and associated mosquito vectors is lacking for this region. To contribute to filling this knowledge gap, the current study was designed with the following objectives: (i) to systematically review data on the occurrence and distribution of arboviruses and mosquito fauna; and (ii) to identify potential spillover mosquito species in the Central African region in the last 30 years. A web search enabled the documentation of 2454 articles from different online databases. The preferred reporting items for systematic reviews and meta-analyses (PRISMA) and the quality of reporting of meta-analyses (QUORUM) steps for a systematic review enabled the selection of 164 articles that fulfilled our selection criteria. Of the six arboviruses (dengue virus (DENV), chikungunya virus (CHIKV), yellow fever virus (YFV), Zika virus (ZIKV), Rift Valley fever virus (RVFV), and West Nile virus (WNV)) of public health concern studied, the most frequently reported were chikungunya and dengue. The entomological records showed >248 species of mosquitoes regrouped under 15 genera, with Anopheles (n = 100 species), Culex (n = 56 species), and Aedes (n = 52 species) having high species diversity. Three genera were rarely represented, with only one species included, namely, Orthopodomyia, Lutzia, and Verrallina, but individuals of the genera Toxorhinchites and Finlayas were not identified at the species level. We found that two Aedes species (Ae. aegypti and Ae. albopictus) colonised the same microhabitat and were involved in major epidemics of the six medically important arboviruses, and other less-frequently identified mosquito genera consisted of competent species and were associated with outbreaks of medical and zoonotic arboviruses. The present study reveals a high species richness of competent mosquito vectors that could lead to the spillover of medically important arboviruses in the region. Although epidemiological studies were found, they were not regularly documented, and this also applies to vector competence and transmission studies. Future studies will consider unpublished information in dissertations and technical reports from different countries to allow their information to be more consistent. A regional project, entitled "Ecology of Arboviruses" (EcoVir), is underway in three countries (Gabon, Benin, and Cote d'Ivoire) to generate a more comprehensive epidemiological and entomological data on this topic.
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Affiliation(s)
- Natacha Poungou
- Ecole Doctorale Regionale en Infectiologie Tropical de Franceville (EDR), University of Science and Technique of Masuku (USTM), Franceville P.O. Box 943, Gabon;
- Laboratoire d’Ecologie des Maladies Transmissibles (LEMAT), Université Libreville Nord (ULN), Libreville P.O. Box 1177, Gabon
| | - Silas Lendzele Sevidzem
- Laboratoire d’Ecologie des Maladies Transmissibles (LEMAT), Université Libreville Nord (ULN), Libreville P.O. Box 1177, Gabon
| | - Aubin Armel Koumba
- Département de Biologie et Ecologie Animale, Institut de Recherche en Ecologie Tropicale (IRET-CENAREST), Libreville P.O. Box 13354, Gabon
| | - Christophe Roland Zinga Koumba
- Département de Biologie et Ecologie Animale, Institut de Recherche en Ecologie Tropicale (IRET-CENAREST), Libreville P.O. Box 13354, Gabon
| | - Phillipe Mbehang
- Département de Biologie et Ecologie Animale, Institut de Recherche en Ecologie Tropicale (IRET-CENAREST), Libreville P.O. Box 13354, Gabon
| | - Richard Onanga
- Center of Interdisciplinary Medical Analysis of Franceville (CIRMF), Franceville P.O. Box 769, Gabon
| | - Julien Zahouli Bi Zahouli
- Centre d’Entomologie Médicale et Vétérinaire, Université Alassane Ouattara, Bouaké 01 BPV 18, Côte d’Ivoire
| | - Gael Darren Maganga
- Center of Interdisciplinary Medical Analysis of Franceville (CIRMF), Franceville P.O. Box 769, Gabon
| | - Luc Salako Djogbénou
- Université d’Abomey-Calavi, Institut Régional de Santé Publique, Ouidah P.O. Box 384, Benin
| | - Steffen Borrmann
- Institute for Tropical Medicine (ITM), University of Tübingen, 72074 Tübingen, Germany
| | - Ayola Akim Adegnika
- Centre de Recherches Médicales de Lambaréné (CERMEL), Lambaréné P.O. Box 242, Gabon
| | - Stefanie C. Becker
- Institute for Parasitology, University of Veterinary Medicine Hannover, 30559 Hannover, Germany;
| | - Jacques François Mavoungou
- Département de Biologie et Ecologie Animale, Institut de Recherche en Ecologie Tropicale (IRET-CENAREST), Libreville P.O. Box 13354, Gabon
| | - Rodrigue Mintsa Nguéma
- Laboratoire d’Ecologie des Maladies Transmissibles (LEMAT), Université Libreville Nord (ULN), Libreville P.O. Box 1177, Gabon
- Département de Biologie et Ecologie Animale, Institut de Recherche en Ecologie Tropicale (IRET-CENAREST), Libreville P.O. Box 13354, Gabon
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Kayange N, Hau DK, Pain K, Mshana SE, Peck R, Gehring S, Groendahl B, Koliopoulos P, Revocatus B, Msaki EB, Malande O. Seroprevalence of Dengue and Chikungunya Virus Infections in Children Living in Sub-Saharan Africa: Systematic Review and Meta-Analysis. CHILDREN (BASEL, SWITZERLAND) 2023; 10:1662. [PMID: 37892325 PMCID: PMC10605353 DOI: 10.3390/children10101662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Revised: 09/23/2023] [Accepted: 09/28/2023] [Indexed: 10/29/2023]
Abstract
Dengue and chikungunya viruses are frequent causes of malarial-like febrile illness in children. The rapid increase in virus transmission by mosquitoes is a global health concern. This is the first systematic review and meta-analysis of the childhood prevalence of dengue and chikungunya in Sub-Saharan Africa (SSA). A comprehensive search of the MEDLINE (Ovid), Embase (Ovid), and Cochrane Library (Wiley) databases was conducted on 28 June 2019, and updated on 12 February 2022. The search strategy was designed to retrieve all articles pertaining to arboviruses in SSA children using both controlled vocabulary and keywords. The pooled (weighted) proportion of dengue and chikungunya was estimated using a random effect model. The overall pooled prevalence of dengue and chikungunya in SSA children was estimated to be 16% and 7%, respectively. Prevalence was slightly lower during the period 2010-2020 compared to 2000-2009. The study design varied depending on the healthcare facility reporting the disease outbreak. Importantly, laboratory methods used to detect arbovirus infections differed. The present review documents the prevalence of dengue and chikungunya in pediatric patients throughout SSA. The results provide unprecedented insight into the transmission of dengue and chikungunya viruses among these children and highlight the need for enhanced surveillance and controlled methodology.
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Affiliation(s)
- Neema Kayange
- Department of Pediatrics, Bugando Medical Centre, Weill Bugando School of Medicine, Catholic University of Health and Allied Sciences, Mwanza P.O. Box 1464, Tanzania;
| | - Duncan K Hau
- Department of Pediatrics, Weill Cornell Medical College, New York, NY 10065, USA;
| | - Kevin Pain
- Samuel J. Wood Library and C.V. Starr Biomedical Information Center, Weill Cornell Medical College, 1300 York Avenue, New York, NY 10065, USA;
| | - Stephen E Mshana
- Department of Microbiology and Immunology, Weill Bugando School of Medicine, Catholic University of Health and Allied Sciences, Mwanza P.O. Box 1464, Tanzania;
| | - Robert Peck
- Department of Pediatrics, Bugando Medical Centre, Weill Bugando School of Medicine, Catholic University of Health and Allied Sciences, Mwanza P.O. Box 1464, Tanzania;
- Department of Pediatrics, Weill Cornell Medical College, New York, NY 10065, USA;
- Center for Global Health, Department of Medicine, Weill Cornell Medical College, New York, NY 10065, USA
| | - Stephan Gehring
- Department of Pediatrics, University Medical Center of the Johannes Gutenberg University, 55131 Mainz, Germany; (S.G.); (B.G.); (P.K.)
| | - Britta Groendahl
- Department of Pediatrics, University Medical Center of the Johannes Gutenberg University, 55131 Mainz, Germany; (S.G.); (B.G.); (P.K.)
| | - Philip Koliopoulos
- Department of Pediatrics, University Medical Center of the Johannes Gutenberg University, 55131 Mainz, Germany; (S.G.); (B.G.); (P.K.)
| | - Baraka Revocatus
- Department of Data and Statistics, Bugando Medical Centre, Mwanza P.O. Box 1370, Tanzania;
| | - Evarist B Msaki
- Department of Epidemiology and Biostatistics, Bugando Medical Centre, Mwanza P.O. Box 1370, Tanzania;
| | - Ombeva Malande
- East Africa Centre for Vaccines and Immunization (ECAVI), Kampala P.O. Box 3040, Uganda;
- Department of Public Health Phamarmacy, Sefako Makgatho Health Sciences University, Pretoria P.O. Box 60, South Africa
- Department of Paediatrics & Child Health, Makerere University, Kampala P.O. Box 7072, Uganda
- Department of Public Health, UNICAF University, Lusaka P.O. Box 20842, Zambia
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Adam A, Lee C, Wang T. Rational Development of Live-Attenuated Zika Virus Vaccines. Pathogens 2023; 12:194. [PMID: 36839466 PMCID: PMC9963317 DOI: 10.3390/pathogens12020194] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2023] [Revised: 01/23/2023] [Accepted: 01/24/2023] [Indexed: 02/03/2023] Open
Abstract
Zika virus (ZIKV), a re-emerging mosquito-borne flavivirus, has caused outbreaks in Africa, Asia, the Pacific, and, more recently, in the Americas. ZIKV has been associated with the neurological autoimmune disorder Guillain-Barre syndrome in adults and congenital Zika syndrome in fetuses and infants, including microcephaly, spontaneous abortion, and intrauterine growth restriction. It is considered to be a major threat to global public health due to its unprecedented clinical impact on humans. Currently, there are no specific prophylactics or therapeutics available to prevent or treat ZIKV infection. The development of a safe and efficacious ZIKV vaccine remains a global health priority. Since the recent outbreak, multiple platforms have been used in the development of candidate ZIKV vaccines. The candidate vaccines have been shown to elicit strong T cell and neutralization antibody responses and protect against ZIKV infection in animal models. Some candidates have progressed successfully to clinical trials. Live-attenuated vaccines, which induce rapid and durable protective immunity, are one of the most important strategies for controlling flavivirus diseases. In this review, we discuss recent progress in the development of candidate live-attenuated ZIKV vaccines.
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Affiliation(s)
- Awadalkareem Adam
- Department of Microbiology & Immunology, University of Texas Medical Branch, Galveston, TX 77555, USA
| | - Christy Lee
- John Sealy School of Medicine, University of Texas Medical Branch, Galveston, TX 77555, USA
| | - Tian Wang
- Department of Microbiology & Immunology, University of Texas Medical Branch, Galveston, TX 77555, USA
- Sealy Institute for Vaccine Sciences, University of Texas Medical Branch, Galveston, TX 77555, USA
- Institute for Human Infections and Immunity, University of Texas Medical Branch, Galveston, TX 77555, USA
- Department of Pathology, University of Texas Medical Branch, Galveston, TX 77555, USA
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Mennechet F, Andreoletti L, Cappelli G, Fokam J, Kuiate JR, Moussa AM, Simporé J, Takoudjou Dzomo R, Torimiro J, Ndembi N, Colizzi V. Launch of the Laboratory for Major Tropical Epidemics (LAGET) in Chad: Strengthening the capacity for epidemiological surveillance, monitoring and diagnosis of endemic or emerging infectious diseases in Central Africa. J Public Health Afr 2023. [DOI: 10.4081/jphia.2022.2457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
In an increasingly interconnected world, with the devastating effects of climate changes and humanitarian crises, pandemics and emerging infectious diseases are more likely to become our daily reality. When it comes to health care, sub-Saharan Africa faces more challenges than most other regions of the world, including lack of funds, precarity and poor infrastructures. Yet, these areas are most often on the front lines of infectious threats.
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Schnabel I, Schneitler S, Schüttoff T, Trawinski H, Lübbert C, Jassoy C. Diagnostic Specificity of Two Dengue Virus IgG ELISAs after Yellow Fever and Japanese Encephalitis Virus Vaccination. Trop Med Infect Dis 2022; 8:tropicalmed8010007. [PMID: 36668914 PMCID: PMC9863392 DOI: 10.3390/tropicalmed8010007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 12/19/2022] [Accepted: 12/21/2022] [Indexed: 12/24/2022] Open
Abstract
Dengue virus (DENV) antibody assays frequently cross-react with sera from individuals who have been infected with or vaccinated against related flaviviruses. The goal of this study was to determine the specificity of two DENV ELISAs with sera from individuals vaccinated against yellow fever virus (YFV) and Japanese encephalitis virus (JEV). The Panbio and the Novatec Dengue IgG ELISAs were tested with sera obtained 3-4 weeks or 0.5-6 years after YFV or JEV vaccination and the diagnostic specificity of the assays was determined. As controls, the sera were tested using DENV, YFV, JEV, Zika and West Nile virus neutralization assays. The diagnostic specificity of the Panbio and the Novatec ELISA with sera from YFV-vaccinated subjects was 98.2% and 88.2%, respectively. Cross-reactions were rare in the first 4 weeks despite high YFV-neutralizing antibody titers and were mostly found later. The specificity of the Panbio and Novatec assays with sera from JEV-vaccinated individuals was 100% and 92.9%. Cross-reactions occurred in the early time period after vaccination. The measurement values of the two ELISAs correlated strongly. Thus, the Panbio ELISA showed higher diagnostic specificity and may be suitable for seroprevalence studies in areas with high disease prevalence.
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Affiliation(s)
- Isabelle Schnabel
- Institute for Medical Microbiology and Virology, University Hospital and Faculty of Medicine, University of Leipzig, 04103 Leipzig, Germany
| | - Sophie Schneitler
- Division of Infectious Diseases and Tropical Medicine, Department of Medicine, University Hospital and Faculty of Medicine, University of Leipzig, 04103 Leipzig, Germany
- Institute of Medical Microbiology and Hygiene, Saarland University, Kirrberger Straße, Building 43, 66421 Homburg, Germany
| | - Tom Schüttoff
- Institute for Medical Microbiology and Virology, University Hospital and Faculty of Medicine, University of Leipzig, 04103 Leipzig, Germany
| | - Henning Trawinski
- Division of Infectious Diseases and Tropical Medicine, Department of Medicine, University Hospital and Faculty of Medicine, University of Leipzig, 04103 Leipzig, Germany
| | - Christoph Lübbert
- Division of Infectious Diseases and Tropical Medicine, Department of Medicine, University Hospital and Faculty of Medicine, University of Leipzig, 04103 Leipzig, Germany
| | - Christian Jassoy
- Institute for Medical Microbiology and Virology, University Hospital and Faculty of Medicine, University of Leipzig, 04103 Leipzig, Germany
- Correspondence: ; Tel.: +49-341-9714314
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Agboli E, Tomazatos A, Maiga-Ascofaré O, May J, Lühken R, Schmidt-Chanasit J, Jöst H. Arbovirus Epidemiology: The Mystery of Unnoticed Epidemics in Ghana, West Africa. Microorganisms 2022; 10:1914. [PMID: 36296190 PMCID: PMC9610185 DOI: 10.3390/microorganisms10101914] [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: 08/31/2022] [Revised: 09/20/2022] [Accepted: 09/21/2022] [Indexed: 11/29/2022] Open
Abstract
It is evident that all the countries surrounding Ghana have experienced epidemics of key arboviruses of medical importance, such as the recent dengue fever epidemic in Burkina Faso. Therefore, Ghana is considered a ripe zone for epidemics of arboviruses, mainly dengue. Surprisingly, Ghana never experienced the propounded deadly dengue epidemic. Indeed, it is mysterious because the mosquito vectors capable of transmitting the dengue virus, such as Aedes aegypti, were identified in Ghana through entomological investigations. Additionally, cases may be missed, as the diagnostic and surveillance capacities of the country are weak. Therefore, we review the arbovirus situation and outline probable reasons for the epidemic mystery in the country. Most of the recorded cases of arbovirus infections were usually investigated via serology by detecting IgM and IgG immunoglobulins in clinical samples, which is indicative of prior exposure but not an active case. This led to the identification of yellow fever virus and dengue virus as the main circulating arboviruses among the Ghanaian population. However, major yellow fever epidemics were reported for over a decade. It is important to note that the reviewed arboviruses were not frequently detected in the vectors. The data highlight the necessity of strengthening the diagnostics and the need for continuous arbovirus and vector surveillance to provide an early warning system for future arbovirus epidemics.
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Affiliation(s)
- Eric Agboli
- Bernhard Nocht Institute for Tropical Medicine, WHO Collaborating Centre for Arbovirus and Haemorrhagic Fever Reference and Research, 20359 Hamburg, Germany
- University of Health and Allied Sciences, Ho PMB 31, Ghana
| | - Alexandru Tomazatos
- Bernhard Nocht Institute for Tropical Medicine, WHO Collaborating Centre for Arbovirus and Haemorrhagic Fever Reference and Research, 20359 Hamburg, Germany
| | - Oumou Maiga-Ascofaré
- Bernhard Nocht Institute for Tropical Medicine, WHO Collaborating Centre for Arbovirus and Haemorrhagic Fever Reference and Research, 20359 Hamburg, Germany
- Kumasi Centre for Collaborative Research in Tropical Medicine, Kwame Nkrumah University of Science and Technology, PMB, Kumasi 039-5028, Ghana
| | - Jürgen May
- Bernhard Nocht Institute for Tropical Medicine, WHO Collaborating Centre for Arbovirus and Haemorrhagic Fever Reference and Research, 20359 Hamburg, Germany
| | - Renke Lühken
- Bernhard Nocht Institute for Tropical Medicine, WHO Collaborating Centre for Arbovirus and Haemorrhagic Fever Reference and Research, 20359 Hamburg, Germany
| | - Jonas Schmidt-Chanasit
- Bernhard Nocht Institute for Tropical Medicine, WHO Collaborating Centre for Arbovirus and Haemorrhagic Fever Reference and Research, 20359 Hamburg, Germany
- Faculty of Mathematics, Informatics and Natural Sciences, Universität Hamburg, 20359 Hamburg, Germany
| | - Hanna Jöst
- Bernhard Nocht Institute for Tropical Medicine, WHO Collaborating Centre for Arbovirus and Haemorrhagic Fever Reference and Research, 20359 Hamburg, Germany
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Souza JVC, Santos HDO, Leite AB, Giovanetti M, Bezerra RDS, de Carvalho E, Bernardino JDST, Viala VL, Haddad R, Ciccozzi M, Alcantara LCJ, Sampaio SC, Covas DT, Kashima S, Elias MC, Slavov SN. Viral Metagenomics for the Identification of Emerging Infections in Clinical Samples with Inconclusive Dengue, Zika, and Chikungunya Viral Amplification. Viruses 2022; 14:v14091933. [PMID: 36146740 PMCID: PMC9505086 DOI: 10.3390/v14091933] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 08/23/2022] [Accepted: 08/30/2022] [Indexed: 11/28/2022] Open
Abstract
Viral metagenomics is increasingly being used for the identification of emerging and re-emerging viral pathogens in clinical samples with unknown etiology. The objective of this study was to shield light on the metavirome composition in clinical samples obtained from patients with clinical history compatible with an arboviral infection, but that presented inconclusive results when tested using RT-qPCR. The inconclusive amplification results might be an indication of the presence of an emerging arboviral agent that is inefficiently amplified by conventional PCR techniques. A total of eight serum samples with inconclusive amplification results for the routinely tested arboviruses—dengue (DENV), Zika (ZIKV), and Chikungunya (CHIKV) obtained during DENV and CHIKV outbreaks registered in the state of Alagoas, Northeast Brazil between July and August 2021—were submitted to metagenomic next-generation sequencing assay using NextSeq 2000 and bioinformatic pipeline for viral discovery. The performed bioinformatic analysis revealed the presence of two arboviruses: DENV type 2 (DENV-2) and CHIKV with a high genome coverage. Further, the metavirome of those samples revealed the presence of multiple commensal viruses apparently without clinical significance. The phylogenetic analysis demonstrated that the DENV-2 genome belonged to the Asian/American genotype and clustered with other Brazilian strains. The identified CHIKV genome was taxonomically assigned as ECSA genotype, which is circulating in Brazil. Together, our results reinforce the utility of metagenomics as a valuable tool for viral identification in samples with inconclusive arboviral amplification. Viral metagenomics is one of the most potent methods for the identification of emerging arboviruses.
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Affiliation(s)
| | | | - Anderson Brandão Leite
- Central Laboratory of Public Health, Maceio 57036-860, Brazil
- Laboratory of Pharmacology and Immunity, Institute of Biological and Health Sciences, Federal University of Alagoas, Maceio 57051-090, Brazil
| | - Marta Giovanetti
- Department of Science and Technology for Humans and the Environment, University of Campus Bio-Medico di Roma, 00185 Rome, Italy
- Laboratory of Flaviviruses, Oswaldo Cruz Foundation, Rio de Janeiro 21040-900, Brazil
| | - Rafael dos Santos Bezerra
- Blood Center of Ribeirao Preto, Faculty of Medicine of Ribeirao Preto, University of Sao Paulo, Rua Tenente Catão Roxo 2501, Ribeirao Preto, Sao Paulo 14051-140, Brazil
| | - Eneas de Carvalho
- Department of Biotechnology (NuCEL), Butantan Institute, Sao Paulo 05503-900, Brazil
| | | | - Vincent Louis Viala
- Department of Biotechnology (NuCEL), Butantan Institute, Sao Paulo 05503-900, Brazil
| | - Rodrigo Haddad
- Faculty of Ceilandia, University of Brasilia, Federal District, Brasília 70904-970, Brazil
| | - Massimo Ciccozzi
- Epidemiology and Statistic Unit, University of Campus Bio-Medico di Roma, 00185 Rome, Italy
| | | | | | - Dimas Tadeu Covas
- Blood Center of Ribeirao Preto, Faculty of Medicine of Ribeirao Preto, University of Sao Paulo, Rua Tenente Catão Roxo 2501, Ribeirao Preto, Sao Paulo 14051-140, Brazil
- Department of Biotechnology (NuCEL), Butantan Institute, Sao Paulo 05503-900, Brazil
| | - Simone Kashima
- Blood Center of Ribeirao Preto, Faculty of Medicine of Ribeirao Preto, University of Sao Paulo, Rua Tenente Catão Roxo 2501, Ribeirao Preto, Sao Paulo 14051-140, Brazil
| | - Maria Carolina Elias
- Department of Biotechnology (NuCEL), Butantan Institute, Sao Paulo 05503-900, Brazil
| | - Svetoslav Nanev Slavov
- Blood Center of Ribeirao Preto, Faculty of Medicine of Ribeirao Preto, University of Sao Paulo, Rua Tenente Catão Roxo 2501, Ribeirao Preto, Sao Paulo 14051-140, Brazil
- Department of Biotechnology (NuCEL), Butantan Institute, Sao Paulo 05503-900, Brazil
- Correspondence: or ; Tel.: +55-16-2101-9300
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Uncovering the Burden of Dengue in Africa: Considerations on Magnitude, Misdiagnosis, and Ancestry. Viruses 2022; 14:v14020233. [PMID: 35215827 PMCID: PMC8877195 DOI: 10.3390/v14020233] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 01/15/2022] [Accepted: 01/18/2022] [Indexed: 01/27/2023] Open
Abstract
Dengue is a re-emerging neglected disease of major public health importance. This review highlights important considerations for dengue disease in Africa, including epidemiology and underestimation of disease burden in African countries, issues with malaria misdiagnosis and co-infections, and potential evidence of genetic protection from severe dengue disease in populations of African descent. The findings indicate that dengue virus prevalence in African countries and populations may be more widespread than reported data suggests, and that the Aedes mosquito vectors appear to be increasing in dissemination and number. Changes in climate, population, and plastic pollution are expected to worsen the dengue situation in Africa. Dengue misdiagnosis is also a problem in Africa, especially due to the typical non-specific clinical presentation of dengue leading to misdiagnosis as malaria. Finally, research suggests that a protective genetic component against severe dengue exists in African descent populations, but further studies should be conducted to strengthen this association in various populations, taking into consideration socioeconomic factors that may contribute to these findings. The main takeaway is that Africa should not be overlooked when it comes to dengue, and more attention and resources should be devoted to this disease in Africa.
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OUP accepted manuscript. Trans R Soc Trop Med Hyg 2022; 116:889-899. [DOI: 10.1093/trstmh/trac045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 04/08/2022] [Accepted: 04/27/2022] [Indexed: 11/14/2022] Open
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