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Limboo N, Saha D. Assessment of sublethal effects of permethrin on adult life characteristics and resistance dynamics in Aedes albopictus (Diptera: Culicidae). PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2024; 203:106020. [PMID: 39084808 DOI: 10.1016/j.pestbp.2024.106020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2024] [Revised: 06/30/2024] [Accepted: 07/04/2024] [Indexed: 08/02/2024]
Abstract
Mosquitoes are regularly exposed to adverse effects of insecticides employed in field during vector control campaigns. Its primary goal is to eliminate the vector population; nevertheless, this practise typically ignores the residual impacts and long-term repercussions on the remaining population. Here, the current study analysed how sublethal exposure of insecticides alter the life qualities, genotypic and biochemical characteristics of mosquitoes. The resistance ratio value in Laboratory Resistant (Lab-R) larvae increased 10 times (0.010 mg/l to 0.108 mg/l) compared to Laboratory Susceptible (LabS) larvae. It also revealed that the surviving mosquitoes had 50% reduction in hatchability but had longer larval and pupal periods (15 days and 2 days), respectively. The survival rates decrease in female by 2 days but increase in male by 7 days which is of concern and necessitates additional study. Moreover, major role of monooxygenase was confirmed behind resistance development which was further supported by piperonyl butoxide assay where reduction in Tolerance Ratio (TR50) by 12-fold occurred and gene expression profile also showed high expression level of CYP6P12 gene. In resistant strain, cuticular thickness increased by 1.23 times and alteration at codon 1532 (ATC to TTC) on VGSC gene leads to mutation I1532F. The data gleaned from our work highlights the threat of sublethal insecticides on vector control techniques and offers ample evidence that the larval selection alters adult life qualities, metabolic properties and transgenerational features which contributes to the damage caused by resistance.
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Affiliation(s)
- Nilu Limboo
- Insect Biochemistry and Molecular Biology Laboratory, Department of Zoology, University of North Bengal, Raja Rammohunpur, District-Darjeeling, 734013 West Bengal, India
| | - Dhiraj Saha
- Insect Biochemistry and Molecular Biology Laboratory, Department of Zoology, University of North Bengal, Raja Rammohunpur, District-Darjeeling, 734013 West Bengal, India.
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Plante KS, Plante JA, Azar SR, Shinde DP, Scharton D, Versiani AF, Oliveira da Silva NI, Strange T, Sacchetto L, Fokam EB, Rossi SL, Weaver SC, Marques RE, Nogueira ML, Vasilakis N. Potential of Ilhéus virus to emerge. Heliyon 2024; 10:e27934. [PMID: 38545168 PMCID: PMC10965525 DOI: 10.1016/j.heliyon.2024.e27934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 03/05/2024] [Accepted: 03/08/2024] [Indexed: 04/02/2024] Open
Abstract
Ilhéus virus (ILHV)(Flaviviridae:Orthoflavivirus) is an arthropod-borne virus (arbovirus) endemic to Central and South America and the Caribbean. First isolated in 1944, most of our knowledge derives from surveillance and seroprevalence studies. These efforts have detected ILHV in a broad range of mosquito and vertebrate species, including humans, but laboratory investigations of pathogenesis and vector competence have been lacking. Here, we develop an immune intact murine model with several ages and routes of administration. Our model closely recapitulates human neuroinvasive disease with ILHV strain- and mouse age-specific virulence, as well as a uniformly lethal Ifnar-/- A129 immunocompromised model. Replication kinetics in several vertebrate and invertebrate cell lines demonstrate that ILHV is capable of replicating to high titers in a wide variety of potential host and vector species. Lastly, vector competence studies provide strong evidence for efficient infection of and potential transmission by Aedes species mosquitoes, despite ILHV's phylogenetically clustering with Culex vectored flaviviruses, suggesting ILHV is poised for emergence in the neotropics.
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Affiliation(s)
- Kenneth S. Plante
- World Reference Center for Emerging Viruses and Arboviruses, University of Texas Medical Branch, Galveston, TX, 77555, USA
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX, 77555, USA
| | - Jessica A. Plante
- World Reference Center for Emerging Viruses and Arboviruses, University of Texas Medical Branch, Galveston, TX, 77555, USA
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX, 77555, USA
| | - Sasha R. Azar
- Department of Pathology, University of Texas Medical Branch, Galveston, TX, 77555, USA
- Center for Tissue Engineering, Department of Surgery, Houston Methodist Research Institute, Houston Methodist Hospital, Houston, TX, 77030, USA
| | - Divya P. Shinde
- World Reference Center for Emerging Viruses and Arboviruses, University of Texas Medical Branch, Galveston, TX, 77555, USA
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX, 77555, USA
| | - Dionna Scharton
- World Reference Center for Emerging Viruses and Arboviruses, University of Texas Medical Branch, Galveston, TX, 77555, USA
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX, 77555, USA
| | - Alice F. Versiani
- Department of Pathology, University of Texas Medical Branch, Galveston, TX, 77555, USA
| | | | - Taylor Strange
- Department of Pathology, University of Texas Medical Branch, Galveston, TX, 77555, USA
| | - Lívia Sacchetto
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, 15090-000, SP, Brazil
| | - Eric B. Fokam
- Laboratory for Biodiversity and Conservation Biology, Department of Animal Biology and Conservation, Faculty of Science, University of Buea, Buea, Cameroon
| | - Shannan L. Rossi
- Department of Pathology, University of Texas Medical Branch, Galveston, TX, 77555, USA
- Institute for Human Infections and Immunity, University of Texas Medical Branch, Galveston, TX, 77555, USA
- Center for Vector-Borne and Zoonotic Diseases, University of Texas Medical Branch, Galveston, TX, 77555, USA
| | - Scott C. Weaver
- World Reference Center for Emerging Viruses and Arboviruses, University of Texas Medical Branch, Galveston, TX, 77555, USA
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX, 77555, USA
- Institute for Human Infections and Immunity, University of Texas Medical Branch, Galveston, TX, 77555, USA
| | - Rafael E. Marques
- Brazilian Biosciences National Laboratory, Brazilian Center for Research in Energy and Materials, Campinas, 13083-100, SP, Brazil
| | - Mauricio L. Nogueira
- Department of Pathology, University of Texas Medical Branch, Galveston, TX, 77555, USA
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, 15090-000, SP, Brazil
- Brazilian Biosciences National Laboratory, Brazilian Center for Research in Energy and Materials, Campinas, 13083-100, SP, Brazil
| | - Nikos Vasilakis
- Department of Pathology, University of Texas Medical Branch, Galveston, TX, 77555, USA
- Institute for Human Infections and Immunity, University of Texas Medical Branch, Galveston, TX, 77555, USA
- Center for Vector-Borne and Zoonotic Diseases, University of Texas Medical Branch, Galveston, TX, 77555, USA
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Cruz ACR, Hernández LHA, Aragão CF, da Paz TYB, da Silva SP, da Silva FS, de Aquino AA, Cereja GJGP, do Nascimento BLS, Rosa Junior JW, Elias CN, Nogueira CG, Ramos DG, Fonseca V, Giovanetti M, Alcantara LCJ, Nunes BTD, Vasconcelos PFDC, Martins LC, Nunes-Neto JP. The Importance of Entomo-Virological Investigation of Yellow Fever Virus to Strengthen Surveillance in Brazil. Trop Med Infect Dis 2023; 8:329. [PMID: 37368747 PMCID: PMC10305592 DOI: 10.3390/tropicalmed8060329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 06/07/2023] [Accepted: 06/13/2023] [Indexed: 06/29/2023] Open
Abstract
The largest outbreak of sylvatic yellow fever virus (YFV) in eight decades was recorded in Brazil between 2016-2018. Besides human and NHP surveillance, the entomo-virological approach is considered as a complementary tool. For this study, a total of 2904 mosquitoes of the Aedes, Haemagogus and Sabethes genera were collected from six Brazilian states (Bahia, Goiás, Mato Grosso, Minas Gerais, Pará, and Tocantins) and grouped into 246 pools, which were tested for YFV using RT-qPCR. We detected 20 positive pools from Minas Gerais, 5 from Goiás, and 1 from Bahia, including 12 of Hg. janthinomys and 5 of Ae. albopictus. This is the first description of natural YFV infection in this species and warns of the likelihood of urban YFV re-emergence with Ae. albopictus as a potential bridge vector. Three YFV sequences from Hg. janthinomys from Goiás and one from Minas Gerais, as well as one from Ae. albopictus from Minas Gerais were clustered within the 2016-2018 outbreak clade, indicating YFV spread from Midwest and its infection in a main and likely novel bridging vector species. Entomo-virological surveillance is critical for YFV monitoring in Brazil, which could highlight the need to strengthen YFV surveillance, vaccination coverage, and vector control measures.
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Affiliation(s)
- Ana Cecília Ribeiro Cruz
- Department of Arbovirology and Hemorrhagic Fevers, Evandro Chagas Institute, Health and Environment Surveillance Secretariat, Ministry of Health, Ananindeua 67030-000, PA, Brazil
- Center for Biological and Health Sciences, Pará State University, Belém 66087-670, PA, Brazil
| | - Leonardo Henrique Almeida Hernández
- Department of Arbovirology and Hemorrhagic Fevers, Evandro Chagas Institute, Health and Environment Surveillance Secretariat, Ministry of Health, Ananindeua 67030-000, PA, Brazil
- Center for Biological and Health Sciences, Pará State University, Belém 66087-670, PA, Brazil
| | - Carine Fortes Aragão
- Department of Arbovirology and Hemorrhagic Fevers, Evandro Chagas Institute, Health and Environment Surveillance Secretariat, Ministry of Health, Ananindeua 67030-000, PA, Brazil
| | - Thito Yan Bezerra da Paz
- Department of Arbovirology and Hemorrhagic Fevers, Evandro Chagas Institute, Health and Environment Surveillance Secretariat, Ministry of Health, Ananindeua 67030-000, PA, Brazil
- Center for Biological and Health Sciences, Pará State University, Belém 66087-670, PA, Brazil
| | - Sandro Patroca da Silva
- Department of Arbovirology and Hemorrhagic Fevers, Evandro Chagas Institute, Health and Environment Surveillance Secretariat, Ministry of Health, Ananindeua 67030-000, PA, Brazil
| | - Fábio Silva da Silva
- Department of Arbovirology and Hemorrhagic Fevers, Evandro Chagas Institute, Health and Environment Surveillance Secretariat, Ministry of Health, Ananindeua 67030-000, PA, Brazil
- Center for Biological and Health Sciences, Pará State University, Belém 66087-670, PA, Brazil
| | - Ana Alice de Aquino
- Department of Arbovirology and Hemorrhagic Fevers, Evandro Chagas Institute, Health and Environment Surveillance Secretariat, Ministry of Health, Ananindeua 67030-000, PA, Brazil
- Institute of Biological Sciences, Federal University of Pará, Belém 66075-110, PA, Brazil
| | - Glennda Juscely Galvão Pereira Cereja
- Department of Arbovirology and Hemorrhagic Fevers, Evandro Chagas Institute, Health and Environment Surveillance Secretariat, Ministry of Health, Ananindeua 67030-000, PA, Brazil
| | - Bruna Lais Sena do Nascimento
- Department of Arbovirology and Hemorrhagic Fevers, Evandro Chagas Institute, Health and Environment Surveillance Secretariat, Ministry of Health, Ananindeua 67030-000, PA, Brazil
| | - José Wilson Rosa Junior
- Department of Arbovirology and Hemorrhagic Fevers, Evandro Chagas Institute, Health and Environment Surveillance Secretariat, Ministry of Health, Ananindeua 67030-000, PA, Brazil
| | | | | | - Daniel Garkauskas Ramos
- Health and Environment Surveillance Secretariat, Ministry of Health, Brasília 70723-040, DF, Brazil
| | - Vagner Fonseca
- Public Health Emergency Department, Pan American Health Organization, World Health Organization, Brasília 70800-400, DF, Brazil
| | - Marta Giovanetti
- René Rachou Institute, Oswaldo Cruz Foundation, Belo Horizonte 30190-002, MG, Brazil
| | | | - Bruno Tardelli Diniz Nunes
- Department of Arbovirology and Hemorrhagic Fevers, Evandro Chagas Institute, Health and Environment Surveillance Secretariat, Ministry of Health, Ananindeua 67030-000, PA, Brazil
| | - Pedro F. da Costa Vasconcelos
- Department of Arbovirology and Hemorrhagic Fevers, Evandro Chagas Institute, Health and Environment Surveillance Secretariat, Ministry of Health, Ananindeua 67030-000, PA, Brazil
- Center for Biological and Health Sciences, Pará State University, Belém 66087-670, PA, Brazil
| | - Livia Carício Martins
- Department of Arbovirology and Hemorrhagic Fevers, Evandro Chagas Institute, Health and Environment Surveillance Secretariat, Ministry of Health, Ananindeua 67030-000, PA, Brazil
| | - Joaquim Pinto Nunes-Neto
- Department of Arbovirology and Hemorrhagic Fevers, Evandro Chagas Institute, Health and Environment Surveillance Secretariat, Ministry of Health, Ananindeua 67030-000, PA, Brazil
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MALDI-TOF MS: An effective tool for a global surveillance of dengue vector species. PLoS One 2022; 17:e0276488. [PMID: 36264911 PMCID: PMC9584457 DOI: 10.1371/journal.pone.0276488] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 10/07/2022] [Indexed: 11/20/2022] Open
Abstract
Dengue, Zika and chikungunya viruses cause significant human public health burdens in the world. These arboviruses are transmitted by vector mosquito species notably Aedes aegypti and Aedes albopictus. In the Pacific region, more vector species of arboviruses belonging to the Scutellaris Group are present. Due to the expansion of human travel and international trade, the threat of their dispersal in other world regions is on the rise. Strengthening of entomological surveillance ensuring rapid detection of introduced vector species is therefore required in order to avoid their establishment and the risk of arbovirus outbreaks. This surveillance relies on accurate species identification. The aim of this study was to assess the use of the Matrix-Assisted Laser Desorption Ionization Time-Of-Flight Mass Spectrometry (MALDI-TOF MS) as a tool for an international identification and surveillance of these mosquito vectors of arboviruses. Field-mosquitoes belonging to 8 species (Ae. aegypti, Ae. albopictus, Aedes polynesiensis, Aedes scutellaris, Aedes pseudoscutellaris, Aedes malayensis, Aedes futunae and Culex quinquefasciatus) from 6 countries in the Pacific, Asian and Madagascar, were included in this study. Analysis provided evidence that a MALDI-TOF database created using mosquitoes from the Pacific region allowed suitable identification of mosquito species from the other regions. This technic was as efficient as the DNA sequencing method in identifying mosquito species. Indeed, with the exception of two Ae. pseudoscutellaris, an exact species identification was obtained for all individual mosquitoes. These findings highlight that the MALDI-TOF MS is a promising tool that could be used for a global comprehensive arbovirus vector surveillance.
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Hribar LJ, Boehmler MB, Murray HL, Pruszynski CA, Leal AL. Mosquito Surveillance and Insecticide Resistance Monitoring Conducted by the Florida Keys Mosquito Control District, Monroe County, Florida, USA. INSECTS 2022; 13:927. [PMID: 36292875 PMCID: PMC9603856 DOI: 10.3390/insects13100927] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 10/04/2022] [Accepted: 10/10/2022] [Indexed: 06/16/2023]
Abstract
Mosquito control programs in the State of Florida are charged with protecting human and animal health, fostering economic development of the State, permitting enjoyment of the natural attractions in Florida, and improving the quality of life of citizens. Mosquito control programs must accomplish these tasks in such a manner as will protect the environment and terrestrial, marine, and freshwater ecosystems. The Florida Keys Mosquito Control District provides a science-based Integrated Pest Management mosquito control program to the residents of the Florida Keys, Monroe County, Florida. Operational decisions are based on surveillance of adult and immature mosquitoes. Mosquito populations are monitored by means of carbon dioxide-baited light traps BG Sentinel traps, truck traps, gravid traps, oviposition traps, and human landing rate counts. Larvae and pupae are monitored by inspections of natural and human-made immature habitats. Due to past and current reliance on chemical pesticides for control of mosquitoes, the District maintains a pesticide resistance detection program consisting of CDC bottle bioassays and larval bioassays, challenging local mosquito species with currently used adulticides and larvicides.
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Affiliation(s)
| | | | - Heidi L. Murray
- Florida Keys Mosquito Control District, Marathon, FL 33030, USA
| | | | - Andrea L. Leal
- Florida Keys Mosquito Control District, Marathon, FL 33030, USA
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Carrazco-Montalvo A, Ponce P, Villota SD, Quentin E, Muñoz-Tobar S, Coloma J, Cevallos V. Establishment, Genetic Diversity, and Habitat Suitability of Aedes albopictus Populations from Ecuador. INSECTS 2022; 13:insects13030305. [PMID: 35323603 PMCID: PMC8950245 DOI: 10.3390/insects13030305] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 03/12/2022] [Accepted: 03/18/2022] [Indexed: 02/04/2023]
Abstract
Simple Summary The tiger mosquito, Aedes albopictus, is a vector of multiple viral diseases. Therefore, it is crucial to understand its distribution and the genetic diversity of Ecuadorian populations. This study used a genetic marker to understand aspects of the dynamics of the Ecuadorian populations of Aedes albopictus from five sites along the coastal, Amazon basin, and Andean lowland regions. Our results evidence two haplotypes within the Ecuadorian populations. Haplotype 1 was found in the coastal regions and Amazon basin, while haplotype 2 was found in the northeastern lowlands. Worldwide, haplotype 1 has been found in 21 countries in temperate and tropical habitats, and haplotype 2 has been found in five countries in tropical habitats. Hence, a difference in adaptation traits could be speculated between both haplotypes. Our study presents a prediction model that shows the suitable habitats for Aedes albopictus in Ecuador. Our results showed that the vector could spread through all country regions, including the Galapagos Islands. Thus, understanding the different aspects of the local populations can help establish better vector surveillance and control strategies. Abstract Aedes albopictus, also known as the tiger mosquito, is widespread worldwide across tropical, subtropical, and temperate regions. This insect is associated with the transmission of several vector-borne diseases, and, as such, monitoring its distribution is highly important for public health. In Ecuador, Ae. albopictus was first reported in 2017 in Guayaquil. Since then, the vector has been identified in the Northeastern lowlands and the Amazon basin. This study aims to determine the genetic diversity of Ecuadorian populations of Ae. albopictus through the analysis of the mitochondrial gene COI and to describe the potential distribution areas of this species within the country. The genetic diversity was determined by combining phylogenetic and population genetics analyses of five localities in Ecuador. Results showed two haplotypes in the Ecuadorian populations of Ae. albopictus. Haplotype 1 (H1) was found in the coastal and Amazon individuals, while haplotype 2 (H2) was only found in the three northeastern lowlands sites. In a worldwide context, H1 is the most widespread in 21 countries with temperate and tropical habitats. In contrast, H2 distribution is limited to five countries in tropical regions, suggesting fewer adaptation traits. Our prediction model showed a suitable habitat for Ae. albopictus in all regions (coastal, Amazon basin, and Andean lowland regions and the Galápagos Islands) of Ecuador. Hence, understanding different aspects of the vector can help us implement better control strategies for surveillance and vectorial control in Ecuador.
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Affiliation(s)
- Andrés Carrazco-Montalvo
- Instituto Nacional de Investigación en Salud Pública, Gestión de Investigación, Desarrollo e Innovación, Quito 170136, Ecuador; (A.C.-M.); (P.P.); (S.D.V.); (S.M.-T.)
| | - Patricio Ponce
- Instituto Nacional de Investigación en Salud Pública, Gestión de Investigación, Desarrollo e Innovación, Quito 170136, Ecuador; (A.C.-M.); (P.P.); (S.D.V.); (S.M.-T.)
| | - Stephany D. Villota
- Instituto Nacional de Investigación en Salud Pública, Gestión de Investigación, Desarrollo e Innovación, Quito 170136, Ecuador; (A.C.-M.); (P.P.); (S.D.V.); (S.M.-T.)
| | - Emmanuelle Quentin
- Centro de Investigación en Salud Pública y Epidemiología Clínica Centro, Universidad UTE, Área Geomática-Matemática, Quito 170129, Ecuador;
| | - Sofía Muñoz-Tobar
- Instituto Nacional de Investigación en Salud Pública, Gestión de Investigación, Desarrollo e Innovación, Quito 170136, Ecuador; (A.C.-M.); (P.P.); (S.D.V.); (S.M.-T.)
- Sección Invertebrados, Instituto Nacional de Biodiversidad, Quito 170135, Ecuador
| | - Josefina Coloma
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California Berkeley, Berkeley, CA 94720-7360, USA;
| | - Varsovia Cevallos
- Instituto Nacional de Investigación en Salud Pública, Gestión de Investigación, Desarrollo e Innovación, Quito 170136, Ecuador; (A.C.-M.); (P.P.); (S.D.V.); (S.M.-T.)
- Correspondence:
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Renault D, Manfrini E, Leroy B, Diagne C, Ballesteros-Mejia L, Angulo E, Courchamp F. Biological invasions in France: Alarming costs and even more alarming knowledge gaps. NEOBIOTA 2021. [DOI: 10.3897/neobiota.67.59134] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The ever-increasing number of introduced species profoundly threatens global biodiversity. While the ecological and evolutionary consequences of invasive alien species are receiving increasing attention, their economic impacts have largely remained understudied, especially in France. Here, we aimed at providing a general overview of the monetary losses (damages caused by) and expenditures (management of) associated with invasive alien species in France. This country has a long history of alien species presence, partly due to its long-standing global trade activities, highly developed tourism, and presence of overseas territories in different regions of the globe, resulting in a conservative minimum of 2,750 introduced and invasive alien species. By synthesizing for the first time the monetary losses and expenditures incurred by invasive alien species in Metropolitan France and French overseas territories, we obtained 1,583 cost records for 98 invasive alien species. We found that they caused a conservative total amount ranging between US$ 1,280 million and 11,535 million in costs over the period 1993–2018. We extrapolated costs for species invading France, for which costs were reported in other countries but not in France, which yielded an additional cost ranging from US$ 151 to 3,030 millions. Damage costs were nearly eight times higher than management expenditure. Insects, and in particular the Asian tiger mosquito Aedes albopictus and the yellow fever mosquito Ae. aegypti, totalled very high economic costs, followed by non-graminoid terrestrial flowering and aquatic plants (Ambrosia artemisiifolia, Ludwigia sp. and Lagarosiphon major). Over 90% of alien species currently recorded in France had no costs reported in the literature, resulting in high biases in taxonomic, regional and activity sector coverages. To conclude, we report alarming costs and even more alarming knowledge gaps. Our results should raise awareness of the importance of biosecurity and biosurveillance in France, and beyond, as well as the crucial need for better reporting and documentation of cost data.
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Umoke PCI, Umoke M, Eyo N, Ugwu Mbbs A, Okeke E, Nwalieji CA, Agbaje SO, Onwe RN, Ekeh DO, Umoke UG, Agu MN, Okide CC. Delay in health-seeking behaviour: Implication to yellow fever outcome in the 2019 outbreak in Nigeria. HEALTH & SOCIAL CARE IN THE COMMUNITY 2021; 29:703-711. [PMID: 33761167 DOI: 10.1111/hsc.13329] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 10/26/2020] [Accepted: 02/04/2021] [Indexed: 06/12/2023]
Abstract
Yellow fever is a vaccine-preventable acute viral disease that can rapidly spread and cause serious public health impact. Delay in seeking health care from health facilities is a potential risk of prolonged disease spread. Therefore, this study assessed the delay in health-seeking behaviour and implications for yellow fever outcomes in the 2019 outbreak in Nigeria. Furthermore, the study examined the factors associated with delayed yellow fever vaccine uptake. A retrospective study was conducted from January to December 2019 using 137 cases recorded in the WHO database. The data were analysed using descriptive (frequency and percentages) and the Chi-square test. The results were significant at p < 0.05. Results showed a low uptake of yellow fever vaccine (24.1%) among patients and a median total health-seeking delay of 7 [IQR 7, 9] days. The delay was more among the older age ≥40 years (12 [IQR 12, 29]), females (8 [IQR 8, 11], and rural inhabitants 7 [IQR7, 9], particularly in Izzi LGA (9 [IQR 9, 16] than the other subgroups. Patients' location or place of residence was significantly associated with the yellow fever vaccine uptake (p < 0.000*), and delay (p = 0.003*). Conclusively, the low vaccine uptake was due to the delay in health-seeking behaviour. Thus, the healthcare system in Nigeria needs to intensify mass participation in immunisation programmes. Interventions that promote behavioural change towards immunisation are required. Also, health promotion campaigns to educate rural people on desirable health-seeking behaviour are needed.
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Affiliation(s)
- Prince C I Umoke
- Department of Human Kinetics and Health Education, University of Nigeria, Nsukka, Nigeria
| | - MaryJoy Umoke
- School Health Programme Unit, Department of Public Health, Ebonyi State Ministry of Health, Abakaliki, Nigeria
| | | | | | | | - Chioma A Nwalieji
- School Health Programme Unit, Department of Public Health, Ebonyi State Ministry of Health, Abakaliki, Nigeria
| | - Samson O Agbaje
- Department of Human Kinetics and Health Education, University of Nigeria, Nsukka, Nigeria
| | - Rosemary N Onwe
- Department of Economics, Ebonyi State University, Abakaliki, Nigeria
| | - David O Ekeh
- Education Foundation, Alex Ekwueme Federal University NdufuAlike, Ikwo, Nigeria
| | - Ugochi G Umoke
- University of Nigeria Teaching Hospital, Ituku Ozalla, Nigeria
| | - Martins N Agu
- Ananda Marga Universal Relief Team Foundation, Abakaliki, Nigeria
| | - Charity C Okide
- Department of Adult Education and Extramural Studies, University of Nigeria, Nsukka, Nigeria
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Abdelkrim O, Samia B, Said Z, Souad L. Modeling and mapping the habitat suitability and the potential distribution of Arboviruses vectors in Morocco. Parasite 2021; 28:37. [PMID: 33861197 PMCID: PMC8051322 DOI: 10.1051/parasite/2021030] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Accepted: 03/13/2021] [Indexed: 12/14/2022] Open
Abstract
Mosquitoes transmit several agents of diseases and the presence of different species represents a threat to animal and public health. Aedes and Culex mosquitoes are of particular concern giving their potential vector competence for Arbovirus transmission. In Morocco, the lack of detailed information related to their spatial distribution raises major concerns and hampers effective vector surveillance and control. Using maximum entropy (Maxent) modeling, we generated prediction models for the potential distribution of Arboviruses vectors (Aedes aegypti, Ae. vexans, Ae. caspius, Ae. detritus, and Culex pipiens) in Morocco, under current climatic conditions. Also, we investigated the habitat suitability for the potential occurrence and establishment of Ae. albopictus and Ae. vittatus recorded only once in the country. Prediction models for these last two species were generated considering occurrence datasets from close countries of the Mediterranean Basin, where Ae. albopictus is well established, and from a worldwide database for the case of Ae. vittatus (model transferability). With the exception of Ae. vittatus, the results identify potential habitat suitability in Morocco for all mosquitos considered. Existing areas with maximum risk of establishment and high potential distribution were mainly located in the northwestern and central parts of Morocco. Our results essentially underline the assumption that Ae. albopictus, if not quickly controlled, might find suitable habitats and has the potential to become established, especially in the northwest of the country. These findings may help to better understand the potential distribution of each species and enhance surveillance efforts in areas identified as high risk.
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Affiliation(s)
- Outammassine Abdelkrim
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Laboratory of Microbiology and Virology, Department of Medical Biology, Faculty of Medicine and Pharmacy, Cadi Ayyad University PO Box 7010 40000 Marrakech Morocco
| | - Boussaa Samia
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ISPITS-Higher Institute of Nursing and Health Technology 40000 Marrakech Morocco
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Ecology and the Environment Laboratory L2E (URAC 32, CNRST ERACNERS 06), Faculty of Sciences Semlalia, Cadi Ayyad University 2390-40080 Marrakech Morocco
| | - Zouhair Said
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Laboratory of Microbiology and Virology, Department of Medical Biology, Faculty of Medicine and Pharmacy, Cadi Ayyad University PO Box 7010 40000 Marrakech Morocco
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Laboratory of Bacteriology–Virology, Avicienne Hospital Military 40000 Marrakech Morocco
| | - Loqman Souad
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Laboratory of Microbiology and Virology, Department of Medical Biology, Faculty of Medicine and Pharmacy, Cadi Ayyad University PO Box 7010 40000 Marrakech Morocco
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10
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Cracknell Daniels B, Gaythorpe K, Imai N, Dorigatti I. Yellow fever in Asia-a risk analysis. J Travel Med 2021; 28:taab015. [PMID: 33506250 PMCID: PMC8045179 DOI: 10.1093/jtm/taab015] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 01/19/2021] [Accepted: 01/20/2021] [Indexed: 12/30/2022]
Abstract
BACKGROUND There is concern about the risk of yellow fever (YF) establishment in Asia, owing to rising numbers of urban outbreaks in endemic countries and globalisation. Following an outbreak in Angola in 2016, YF cases were introduced into China. Prior to this, YF had never been recorded in Asia, despite climatic suitability and the presence of mosquitoes. An outbreak in Asia could result in widespread fatalities and huge economic impact. Therefore, quantifying the potential risk of YF outbreaks in Asia is a public health priority. METHODS Using international flight data and YF incidence estimates from 2016, we quantified the risk of YF introduction via air travel into Asia. In locations with evidence of a competent mosquito population, the potential for autochthonous YF transmission was estimated using a temperature-dependent model of the reproduction number and a branching process model assuming a negative binomial distribution. RESULTS In total, 25 cities across Asia were estimated to be at risk of receiving at least one YF viraemic traveller during 2016. At their average temperatures, we estimated the probability of autochthonous transmission to be <50% in all cities, which was primarily due to the limited number of estimated introductions that year. CONCLUSION Despite the rise in air travel, we found low support for travel patterns between YF endemic countries and Asia resulting in autochthonous transmission during 2016. This supports the historic absence of YF in Asia and suggests it could be due to a limited number of introductions in previous years. Future increases in travel volumes or YF incidence can increase the number of introductions and the risk of autochthonous transmission. Given the high proportion of asymptomatic or mild infections and the challenges of YF surveillance, our model can be used to estimate the introduction and outbreak risk and can provide useful information to surveillance systems.
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Affiliation(s)
- Bethan Cracknell Daniels
- MRC Centre for Global Infectious Disease Analysis; and the Abdul Latif Jameel Institute for Disease and Emergency Analytics (J-IDEA), School of Public Health, Imperial College London
| | - Katy Gaythorpe
- MRC Centre for Global Infectious Disease Analysis; and the Abdul Latif Jameel Institute for Disease and Emergency Analytics (J-IDEA), School of Public Health, Imperial College London
| | - Natsuko Imai
- MRC Centre for Global Infectious Disease Analysis; and the Abdul Latif Jameel Institute for Disease and Emergency Analytics (J-IDEA), School of Public Health, Imperial College London
| | - Ilaria Dorigatti
- MRC Centre for Global Infectious Disease Analysis; and the Abdul Latif Jameel Institute for Disease and Emergency Analytics (J-IDEA), School of Public Health, Imperial College London
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11
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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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12
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Parola P, Musso D. Zika, dengue, chikungunya and yellow fever infections in Europe? - Winter is over, warm days are coming - So hedge your bets. Travel Med Infect Dis 2020; 35:101614. [PMID: 32145385 DOI: 10.1016/j.tmaid.2020.101614] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 02/28/2020] [Accepted: 03/03/2020] [Indexed: 11/30/2022]
Affiliation(s)
- Philippe Parola
- IHU-Méditerranée Infection, Marseille, France; Aix Marseille Univ, IRD, AP-HM, SSA, VITROME, Marseille, France.
| | - Didier Musso
- Aix Marseille Univ, IRD, AP-HM, SSA, VITROME, Marseille, France; Laboratoire Eurofins Labazur Guyane, French Guiana
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13
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Kamgang B, Vazeille M, Yougang AP, Tedjou AN, Wilson-Bahun TA, Mousson L, Wondji CS, Failloux AB. Potential of Aedes albopictus and Aedes aegypti (Diptera: Culicidae) to transmit yellow fever virus in urban areas in Central Africa. Emerg Microbes Infect 2020; 8:1636-1641. [PMID: 31711378 PMCID: PMC6853216 DOI: 10.1080/22221751.2019.1688097] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Yellow Fever (YF) remains a major public health issue in Sub-Saharan Africa and South America, despite the availability of an effective vaccine. In Africa, most YF outbreaks are reported in West Africa. However, urban outbreaks occurred in 2016 in both Angola and the Democratic Republic of Congo (DRC), and imported cases were reported in Chinese workers coming back from Africa. In Central Africa, Cameroon and the Republic of Congo host a high proportion of non-vaccinated populations increasing the risk of urban outbreaks. The main vector is Aedes aegypti and possibly, Aedes albopictus, both being anthropophilic and domestic mosquitoes. Here, we provide evidence that both Ae. aegypti and Ae. albopictus in Cameroon and the Republic of Congo are able to transmit Yellow fever virus (YFV) with higher rates of infection, dissemination, and transmission for Ae. aegypti. We conclude that the potential of both Aedes species to transmit YFV could increase the risk of urban YF transmission and urge public health authorities to intensify their efforts to control domestic vectors, and extend vaccine coverage to prevent major YFV outbreak.
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Affiliation(s)
- Basile Kamgang
- Department of Medical Entomology, Centre for Research in Infectious Diseases, Yaoundé, Cameroon
| | - Marie Vazeille
- Department of Virology, Institut Pasteur, Unit of Arboviruses and Insect Vectors, Paris, France
| | - Aurélie P Yougang
- Department of Medical Entomology, Centre for Research in Infectious Diseases, Yaoundé, Cameroon.,Department of Animal Biology, Faculty of Sciences, University of Yaoundé I, Yaoundé, Cameroon
| | - Armel N Tedjou
- Department of Medical Entomology, Centre for Research in Infectious Diseases, Yaoundé, Cameroon.,Department of Animal Biology, Faculty of Sciences, University of Yaoundé I, Yaoundé, Cameroon
| | - Theodel A Wilson-Bahun
- Department of Medical Entomology, Centre for Research in Infectious Diseases, Yaoundé, Cameroon.,Faculty of Science and Technology, Marien Ngouabi University, Brazzaville, Congo
| | - Laurence Mousson
- Department of Virology, Institut Pasteur, Unit of Arboviruses and Insect Vectors, Paris, France
| | - Charles S Wondji
- Department of Medical Entomology, Centre for Research in Infectious Diseases, Yaoundé, Cameroon.,Vector Biology Department, Liverpool School of Tropical Medicine, Liverpool, UK
| | - Anna-Bella Failloux
- Department of Virology, Institut Pasteur, Unit of Arboviruses and Insect Vectors, Paris, France
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14
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Chen LH, Wilson ME. Yellow fever control: current epidemiology and vaccination strategies. TROPICAL DISEASES TRAVEL MEDICINE AND VACCINES 2020; 6:1. [PMID: 31938550 PMCID: PMC6954598 DOI: 10.1186/s40794-020-0101-0] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Accepted: 01/05/2020] [Indexed: 12/16/2022]
Abstract
Yellow fever (YF) outbreaks continue, have expanded into new areas and threaten large populations in South America and Africa. Predicting where epidemics might occur must take into account local mosquito populations and specific YF virus strain, as well as ecoclimatic conditions, sociopolitical and demographic factors including population size, density, and mobility, and vaccine coverage. Populations of Aedes aegypti and Aedes albopictus from different regions vary in susceptibility to and capacity to transmit YF virus. YF virus cannot be eliminated today because the virus circulates in animal reservoirs, but human disease could be eliminated with wide use of the vaccine. WHO EYE (Eliminate Yellow Fever Epidemics) is a welcome plan to control YF, with strategies to be carried out from 2017 to 2026: to expand use of YF vaccine, to prevent international spread, and to contain outbreaks rapidly. YF vaccination is the mainstay in controlling YF outbreaks, but global supply is insufficient. Therefore, dose-sparing strategies have been proposed including fractional dosing and intradermal administration. Fractional dosing has been effectively used in outbreak control but currently does not satisfy International Health Regulations; special documentation is needed for international travel. Vector control is another facet in preventing YF outbreaks, and novel methods are being considered and proposed.
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Affiliation(s)
- Lin H Chen
- 1Mount Auburn Hospital, 330 Mount Auburn Street, Cambridge, MA 02138 USA.,2Harvard Medical School, Boston, MA USA
| | - Mary E Wilson
- 3Department of Global Health and Population, Harvard T.H. Chan School of Public Health, Boston, MA USA.,4Department of Epidemiology and Biostatistics, School of Medicine, University of California, San Francisco, USA
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15
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Yellow Fever: Integrating Current Knowledge with Technological Innovations to Identify Strategies for Controlling a Re-Emerging Virus. Viruses 2019; 11:v11100960. [PMID: 31627415 PMCID: PMC6832525 DOI: 10.3390/v11100960] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 09/30/2019] [Accepted: 10/11/2019] [Indexed: 01/17/2023] Open
Abstract
Yellow fever virus (YFV) represents a re-emerging zoonotic pathogen, transmitted by mosquito vectors to humans from primate reservoirs. Sporadic outbreaks of YFV occur in endemic tropical regions, causing a viral hemorrhagic fever (VHF) associated with high mortality rates. Despite a highly effective vaccine, no antiviral treatments currently exist. Therefore, YFV represents a neglected tropical disease and is chronically understudied, with many aspects of YFV biology incompletely defined including host range, host–virus interactions and correlates of host immunity and pathogenicity. In this article, we review the current state of YFV research, focusing on the viral lifecycle, host responses to infection, species tropism and the success and associated limitations of the YFV-17D vaccine. In addition, we highlight the current lack of available treatments and use publicly available sequence and structural data to assess global patterns of YFV sequence diversity and identify potential drug targets. Finally, we discuss how technological advances, including real-time epidemiological monitoring of outbreaks using next-generation sequencing and CRISPR/Cas9 modification of vector species, could be utilized in future battles against this re-emerging pathogen which continues to cause devastating disease.
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16
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Fortuna C, Toma L, Remoli ME, Amendola A, Severini F, Boccolini D, Romi R, Venturi G, Rezza G, Di Luca M. Vector competence of Aedes albopictus for the Indian Ocean lineage (IOL) chikungunya viruses of the 2007 and 2017 outbreaks in Italy: a comparison between strains with and without the E1:A226V mutation. ACTA ACUST UNITED AC 2019; 23. [PMID: 29871722 DOI: 10.2807/1560-7917.es.2018.23.22.1800246] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
We compared the vector competence of an Italian population of Aedes albopictus for two strains of chikungunya virus (CHIKV), with and without E1:A226V mutation, responsible for outbreaks in 2007 in the Emilia Romagna region and 2017 in the Lazio and Calabria regions, respectively. Ae. albopictus showed similar vector competence for both viral strains indicating that E1:A226V mutation is not exclusively responsible for ability of CHIKV to replicate well in this mosquito species.
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Affiliation(s)
- Claudia Fortuna
- These authors contributed equally to this article and share first authorship.,Istituto Superiore di Sanità, Department of Infectious Diseases, National Reference Laboratory for Arboviruses, Rome, Italy
| | - Luciano Toma
- Istituto Superiore di Sanità, Department of Infectious Diseases, Unit of Vector-borne Diseases, Rome, Italy.,These authors contributed equally to this article and share first authorship
| | - Maria Elena Remoli
- Istituto Superiore di Sanità, Department of Infectious Diseases, National Reference Laboratory for Arboviruses, Rome, Italy
| | - Antonello Amendola
- Istituto Superiore di Sanità, Department of Infectious Diseases, National Reference Laboratory for Arboviruses, Rome, Italy
| | - Francesco Severini
- Istituto Superiore di Sanità, Department of Infectious Diseases, Unit of Vector-borne Diseases, Rome, Italy
| | - Daniela Boccolini
- Istituto Superiore di Sanità, Department of Infectious Diseases, Unit of Vector-borne Diseases, Rome, Italy
| | - Roberto Romi
- Istituto Superiore di Sanità, Department of Infectious Diseases, Unit of Vector-borne Diseases, Rome, Italy
| | - Giulietta Venturi
- Istituto Superiore di Sanità, Department of Infectious Diseases, National Reference Laboratory for Arboviruses, Rome, Italy
| | - Giovanni Rezza
- Istituto Superiore di Sanità, Department of Infectious Diseases, National Reference Laboratory for Arboviruses, Rome, Italy
| | - Marco Di Luca
- Istituto Superiore di Sanità, Department of Infectious Diseases, Unit of Vector-borne Diseases, Rome, Italy
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17
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Gossner CM, Haussig JM, de Bellegarde de Saint Lary C, Kaasik Aaslav K, Schlagenhauf P, Sudre B. Increased risk of yellow fever infections among unvaccinated European travellers due to ongoing outbreak in Brazil, July 2017 to March 2018. ACTA ACUST UNITED AC 2019; 23. [PMID: 29560853 PMCID: PMC5861590 DOI: 10.2807/1560-7917.es.2018.23.11.18-00106] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Since December 2016, Brazil has faced a large outbreak of yellow fever with ca 1,500 confirmed human cases. In the first 2 months of 2018, Brazil reported almost as many cases as in 2017 as a whole. In these 2 months, five imported cases were reported among unvaccinated European travellers. Three had travelled to Ilha Grande, a popular destination among European tourists. Physicians and European travellers visiting Brazil should follow yellow fever vaccination recommendations.
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Affiliation(s)
- Céline M Gossner
- European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden
| | - Joana M Haussig
- European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden
| | | | - Kaja Kaasik Aaslav
- European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden
| | - Patricia Schlagenhauf
- World Health Organization Collaborating Centre for Travellers' Health, Epidemiology, Biostatistics, and Prevention Institute, University of Zürich, Switzerland
| | - Bertrand Sudre
- European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden
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18
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Flamand C, Bailly S, Fritzell C, Fernandes Pellerin S, Toure A, Chateau N, Saout M, Linares S, Dubois F, Filleul L, Kazanji M. Vaccination coverage in the context of the emerging Yellow Fever threat in French Guiana. PLoS Negl Trop Dis 2019; 13:e0007661. [PMID: 31425507 PMCID: PMC6715233 DOI: 10.1371/journal.pntd.0007661] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 08/29/2019] [Accepted: 07/24/2019] [Indexed: 12/18/2022] Open
Abstract
Background French Guiana, a French overseas department located in South America between Brazil and Surinam, is the only European territory geographically located in the Amazonian forest complex and is considered endemic for yellow fever (YF). In the context of the emergent threat of YF in Latin America, we conducted a large household cross-sectional survey from June to October 2017 to estimate vaccination coverage in the population and to determine associations with sociodemographic and geographical characteristics. Methodology/Principal findings In total, 1,415 households and 2,697 individuals were included from the 22 municipalities of French Guiana. YF vaccination coverage was estimated at 95.0% (95% CI: 93.4–96.2) in the entire territory but was spatially heterogeneous, with the lowest levels estimated in the western part of the territory along the Surinamese cross-border region, particularly in children under 16 years who were not enrolled in school, immigrant adults and disadvantaged populations with low socioeconomic indexes. Conclusions/Significance Despite the good vaccination coverage against YF in the general population of French Guiana resulting from the compulsory nature of YF vaccination for residents and travelers, there is an urgent need to improve vaccination coverage in vulnerable populations living in the northwestern part of the territory to limit the risk of transmission in the context of the emerging YF threat in South America. Despite the relative rarity of YF and the significant number of infectious and tropical diseases in French Guiana, clinicians should adopt a high index of suspicion for YF, particularly in vulnerable and at-risk populations. Yellow fever (YF) is the most severe arbovirus to circulate in the Americas. French Guiana, a French overseas department located in South America between Brazil and Surinam, is the only European territory geographically located in the Amazonian forest complex and is considered endemic for YF. We conducted a large general population survey from June to October 2017 to estimate vaccination coverage in the population and to identify target vulnerable populations for catch-up vaccination strategies. In total, 1,415 households and 2,697 individuals were included from the 22 municipalities of French Guiana. YF vaccination coverage was estimated at 95.0% (95% CI: 93.4–96.2) in the entire territory but was spatially heterogeneous, with the lowest levels estimated in the western part of the territory along the Surinamese cross-border region, particularly in children under 16 years who were not enrolled in school, immigrant adults and disadvantaged groups of populations with low socioeconomic indexes. Our findings showed that vaccination campaigns should be prioritized and adapted to improve vaccination coverage among vulnerable populations living in the northwestern part of the territory to limit the risk of transmission in the context of the emerging YF threat in South America. Despite the relative rarity of YF and the significant number of infectious and tropical diseases in French Guiana, clinicians should adopt a high index of suspicion for YF, particularly in vulnerable and at-risk populations.
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Affiliation(s)
- Claude Flamand
- Epidemiology Unit, Institut Pasteur in French Guiana, Cayenne, French Guiana
- * E-mail:
| | - Sarah Bailly
- Epidemiology Unit, Institut Pasteur in French Guiana, Cayenne, French Guiana
| | - Camille Fritzell
- Epidemiology Unit, Institut Pasteur in French Guiana, Cayenne, French Guiana
| | | | - Alhassane Toure
- Epidemiology Unit, Institut Pasteur in French Guiana, Cayenne, French Guiana
| | - Naïssa Chateau
- Epidemiology Unit, Institut Pasteur in French Guiana, Cayenne, French Guiana
| | - Mona Saout
- Epidemiology Unit, Institut Pasteur in French Guiana, Cayenne, French Guiana
| | - Sébastien Linares
- Geographic Information and Knowledge Dissemination Unit, Direction de l’Environnement, de l’Aménagement et du logement Guyane, Cayenne, French Guiana
| | - Fabien Dubois
- Geographic Information and Knowledge Dissemination Unit, Direction de l’Environnement, de l’Aménagement et du logement Guyane, Cayenne, French Guiana
| | | | - Mirdad Kazanji
- Epidemiology Unit, Institut Pasteur in French Guiana, Cayenne, French Guiana
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19
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Jácome R, Carrasco-Hernández R, Campillo-Balderas JA, López-Vidal Y, Lazcano A, Wenzel RP, Ponce de León S. A yellow flag on the horizon: The looming threat of yellow fever to North America. Int J Infect Dis 2019; 87:143-150. [PMID: 31382047 DOI: 10.1016/j.ijid.2019.07.033] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2019] [Revised: 07/26/2019] [Accepted: 07/26/2019] [Indexed: 01/12/2023] Open
Abstract
OBJECTIVES Yellow fever virus historically was a frequent threat to American and European coasts. Medical milestones such as the discovery of mosquitoes as vectors and subsequently an effective vaccine significantly reduced its incidence, in spite of which, thousands of cases of this deathly disease still occur regularly in Sub-Saharan Africa and the Amazonian basin in South America, which are usually not reported. An urban outbreak in Angola, consecutive years of increasing incidence near major Brazilian cities, and imported cases in China, South America and Europe, have brought this virus back to the global spotlight. The aim of this article is to underline that the preventive YFV measures, such as vaccination, need to be carefully revised in order to minimize the risks of new YFV outbreaks, especially in urban or immunologically vulnerable places. Furthermore, this article highlights the diverse factors that have favored the spread of other Aedes spp.-associated arboviral diseases like Dengue, Chikungunya and Zika, to northern latitudes causing epidemics in the United States and Europe, emphasizing the possibility that YFV might follow the path of these viruses unless enhanced surveillance and efficient control systems are urgently initiated.
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Affiliation(s)
- Rodrigo Jácome
- Laboratorio de Origen de la Vida, Facultad de Ciencias, Universidad Nacional Autónoma de México, Av. Universidad 3000, C.P. 04510, Mexico City, Mexico
| | - R Carrasco-Hernández
- División de Investigación, Facultad de Medicina, Universidad Nacional Autónoma de México, Av. Universidad 3000, C.P. 04510, Mexico City, Mexico
| | - José Alberto Campillo-Balderas
- Laboratorio de Origen de la Vida, Facultad de Ciencias, Universidad Nacional Autónoma de México, Av. Universidad 3000, C.P. 04510, Mexico City, Mexico
| | - Yolanda López-Vidal
- Programa de Inmunología Molecular Microbiana, Facultad de Medicina, Universidad Nacional Autónoma de México, Av. Universidad 3000, C.P. 04510, Mexico City, Mexico
| | - Antonio Lazcano
- Laboratorio de Origen de la Vida, Facultad de Ciencias, Universidad Nacional Autónoma de México, Av. Universidad 3000, C.P. 04510, Mexico City, Mexico; Miembro de El Colegio Nacional, Mexico
| | | | - Samuel Ponce de León
- Programa Universitario de Investigación en Salud, Universidad Nacional Autónoma de México, Av. Universidad 3000, C.P. 04510, Mexico City, Mexico.
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20
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Multini LC, de Souza ALDS, Marrelli MT, Wilke ABB. Population structuring of the invasive mosquito Aedes albopictus (Diptera: Culicidae) on a microgeographic scale. PLoS One 2019; 14:e0220773. [PMID: 31374109 PMCID: PMC6677317 DOI: 10.1371/journal.pone.0220773] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Accepted: 07/23/2019] [Indexed: 12/22/2022] Open
Abstract
Aedes albopictus is an invasive mosquito species that has spread globally and can transmit several arboviruses, including dengue, chikungunya and yellow fever. The species was first reported in Brazil in 1986 and since then has been found in 24 of the 27 Brazilian states, often in peri-urban environments close to highly urbanized areas. To date, population genetics of this important mosquito in areas in the city of São Paulo has not been investigated. In this study, we used 12 microsatellite loci to investigate the microgeographic population genetics of Ae. albopictus, which is present throughout the city of São Paulo. All the analyses revealed structuring of the populations studied, divided into two groups with restricted gene flow between them and without evidence of isolation by distance. We propose two hypotheses to explain the results: (i) low dispersal capability—limited gene flow between populations is due to the low dispersal capability inherent to Ae. albopictus; and (ii) multiple introductions—the structure identified here results from multiple introductions, which led to different dispersal patterns within the city and more genetic heterogeneity. The ability of Ae. albopictus to invade new areas and expand may explain why these mosquito populations appear to be well established and thriving in the city of São Paulo.
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Affiliation(s)
- Laura Cristina Multini
- Department of Epidemiology, Faculty of Public Health, University of São Paulo, São Paulo, SP, Brazil
- * E-mail:
| | | | - Mauro Toledo Marrelli
- Department of Epidemiology, Faculty of Public Health, University of São Paulo, São Paulo, SP, Brazil
- São Paulo Institute of Tropical Medicine, University of São Paulo, São Paulo, SP, Brazil
| | - André Barretto Bruno Wilke
- Department of Public Health Sciences, Miller School of Medicine, University of Miami, Miami, FL, United States of America
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Manica M, Guzzetta G, Filipponi F, Solimini A, Caputo B, Della Torre A, Rosà R, Merler S. Assessing the risk of autochthonous yellow fever transmission in Lazio, central Italy. PLoS Negl Trop Dis 2019; 13:e0006970. [PMID: 30629583 PMCID: PMC6328239 DOI: 10.1371/journal.pntd.0006970] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Affiliation(s)
- Mattia Manica
- Department of Biodiversity and Molecular Ecology, Research and Innovation Centre, Fondazione Edmund Mach, San Michele all'Adige, Trento, Italy
| | - Giorgio Guzzetta
- Center for Information Technology, Fondazione Bruno Kessler, Trento, Italy
- Epilab-JRU, FEM-FBK Joint Research Unit, Trento, Italy
| | - Federico Filipponi
- Department of Public Health and Infectious Diseases, Laboratory affiliated to Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Sapienza University of Rome, Rome, Italy
| | - Angelo Solimini
- Department of Public Health and Infectious Diseases, Laboratory affiliated to Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Sapienza University of Rome, Rome, Italy
| | - Beniamino Caputo
- Department of Public Health and Infectious Diseases, Laboratory affiliated to Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Sapienza University of Rome, Rome, Italy
| | - Alessandra Della Torre
- Department of Public Health and Infectious Diseases, Laboratory affiliated to Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Sapienza University of Rome, Rome, Italy
| | - Roberto Rosà
- Department of Biodiversity and Molecular Ecology, Research and Innovation Centre, Fondazione Edmund Mach, San Michele all'Adige, Trento, Italy
- Epilab-JRU, FEM-FBK Joint Research Unit, Trento, Italy
| | - Stefano Merler
- Center for Information Technology, Fondazione Bruno Kessler, Trento, Italy
- Epilab-JRU, FEM-FBK Joint Research Unit, Trento, Italy
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Urban yellow fever outbreak-Democratic Republic of the Congo, 2016: Towards more rapid case detection. PLoS Negl Trop Dis 2018; 12:e0007029. [PMID: 30532188 PMCID: PMC6300298 DOI: 10.1371/journal.pntd.0007029] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 12/19/2018] [Accepted: 11/27/2018] [Indexed: 12/21/2022] Open
Abstract
Background Between December 2015 and July 2016, a yellow fever (YF) outbreak affected urban areas of Angola and the Democratic Republic of the Congo (DRC). We described the outbreak in DRC and assessed the accuracy of the YF case definition, to facilitate early diagnosis of cases in future urban outbreaks. Methodology/Principal findings In DRC, suspected YF infection was defined as jaundice within 2 weeks after acute fever onset and was confirmed by either IgM serology or PCR for YF viral RNA. We used case investigation and hospital admission forms. Comparing clinical signs between confirmed and discarded suspected YF cases, we calculated the predictive values of each sign for confirmed YF and the diagnostic accuracy of several suspected YF case definitions. Fifty seven of 78 (73%) confirmed cases had travelled from Angola: 88% (50/57) men; median age 31 years (IQR 25–37). 15 (19%) confirmed cases were infected locally in urban settings in DRC. Median time from symptom onset to healthcare consultation was 7 days (IQR 6–9), to appearance of jaundice 8 days (IQR 7–11), to sample collection 9 days (IQR 7–14), and to hospitalization 17 days (IQR 11–26). A case definition including fever or jaundice, combined with myalgia or a negative malaria test, yielded an improved sensitivity (100%) and specificity (57%). Conclusions/Significance As jaundice appeared late, the majority of cases were diagnosed too late for supportive care and prompt vector control. In areas with known local YF transmission, a suspected case definition without jaundice as essential criterion could facilitate earlier YF diagnosis, care and control. Yellow fever is a mosquito-borne viral infection characterized by fever, followed after several days by jaundice, liver or kidney failure, shock or bleeding in up to 25% of cases. Although the virus primarily circulates in forests among primates, it can also be transmitted from human to human by mosquitoes in urban areas. If infected patients are detected early, they could benefit from timely supportive treatment, and control measures such as mosquito bite prevention, mosquito control, and mass vaccination campaigns, could prevent further spread of the disease. During 2015–16 a yellow fever outbreak spread in urban areas of Angola and DRC. The present study showed that most yellow fever patients that were diagnosed in DRC had travelled from Angola where they have been infected, and that most were adult men. Nevertheless, several patients have been infected locally, in urban settings in three provinces of DRC. Patients were diagnosed only when jaundice appeared, more than a week after their illness started, too late to fully benefit from supportive treatment. During urban outbreaks, improving early access to healthcare and earlier detection of patients by recognizing acute fever when malaria infection is excluded, could improve yellow fever care and control.
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Murray HL, Pruszynski CA, Leal AL, Hribar LJ. Establishment of Aedes albopictus (Diptera: Culicidae) in the Florida Keys, 2001-2017. JOURNAL OF MEDICAL ENTOMOLOGY 2018; 55:1607-1612. [PMID: 29939298 DOI: 10.1093/jme/tjy102] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Indexed: 06/08/2023]
Abstract
The presence of Aedes albopictus (Skuse) was first reported in the Florida Keys in 1993. Despite extensive surveillance, the Florida Keys Mosquito Control District (FKMCD) only collected specimens occasionally on a few islands, some years finding no evidence of the invasive species. In 2013-2017, FKMCD witnessed a sudden increase in population size and geographic extent of Ae. albopictus. Samples of Ae. albopictus have now been identified on 30 different islands in the Florida Keys. Three islands in particular (Key Largo, Big Pine Key, and Stock Island) have produced multiple positive samples during at least 4 of the last 5 yr, suggesting establishment of the invasive species. FKMCD continues to monitor Ae. albopictus throughout the Keys and make extensive efforts to reduce population abundance and geographic extent of this disease vector.
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Affiliation(s)
| | | | - Andrea L Leal
- Florida Keys Mosquito Control District, Marathon, FL
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Experimental Adaptation of the Yellow Fever Virus to the Mosquito Aedes albopictus and Potential risk of urban epidemics in Brazil, South America. Sci Rep 2018; 8:14337. [PMID: 30254315 PMCID: PMC6156417 DOI: 10.1038/s41598-018-32198-4] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 08/30/2018] [Indexed: 01/25/2023] Open
Abstract
Despite the availability of an efficient vaccine, Yellow fever (YF), a viral disease transmitted by mosquitoes, is still a threat. In Brazil, the yellow fever virus (YFV) has been restricted to a jungle cycle for more than 70 years. However, YFV has recently invaded populated cities in the Southeast such as Rio de Janeiro where the opportunistic mosquito Aedes albopictus is well established. Using in vivo passages of YFV in Ae. albopictus, we have selected viral strains presenting substitutions in NS1 gene. We did 10 passages of YFV-74018 on two distinct Ae. albopictus populations: (i) Manaus collected from a YFV-endemic area in Amazonia and (ii) PNMNI from a YFV-free area in the state of Rio de Janeiro. Full viral genomes were deep sequenced at each passage. We obtained two YFV strains presenting a non-synonymous substitution in the NS1 gene. Interestingly, they intervened at two different positions in NS1 gene according to the mosquito population: I2772T in Ae. albopictus Manaus and S3303N in Ae. albopictus PNMNI. Both substitutions reached fixation at the passage 10. Our data suggest that YFV has the potential for adaption to Ae. albopictus thereby posing a threat to most cities in South America where this mosquito is present.
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Yellow fever in the diagnostics laboratory. Emerg Microbes Infect 2018; 7:129. [PMID: 30002363 PMCID: PMC6043483 DOI: 10.1038/s41426-018-0128-8] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2018] [Revised: 05/30/2018] [Accepted: 06/03/2018] [Indexed: 12/15/2022]
Abstract
Yellow fever (YF) remains a public health issue in endemic areas despite the availability of a safe and effective vaccine. In 2015–2016, urban outbreaks of YF were declared in Angola and the Democratic Republic of Congo, and a sylvatic outbreak has been ongoing in Brazil since December 2016. Of great concern is the risk of urban transmission cycles taking hold in Brazil and the possible spread to countries with susceptible populations and competent vectors. Vaccination remains the cornerstone of an outbreak response, but a low vaccine stockpile has forced a sparing-dose strategy, which has thus far been implemented in affected African countries and now in Brazil. Accurate laboratory confirmation of cases is critical for efficient outbreak control. A dearth of validated commercial assays for YF, however, and the shortcomings of serological methods make it challenging to implement YF diagnostics outside of reference laboratories. We examine the advantages and drawbacks of existing assays to identify the barriers to timely and efficient laboratory diagnosis. We stress the need to develop new diagnostic tools to meet current challenges in the fight against YF.
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Klitting R, Gould EA, Paupy C, de Lamballerie X. What Does the Future Hold for Yellow Fever Virus? (I). Genes (Basel) 2018; 9:E291. [PMID: 29890711 PMCID: PMC6027470 DOI: 10.3390/genes9060291] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 06/04/2018] [Accepted: 06/06/2018] [Indexed: 01/14/2023] Open
Abstract
The recent resurgence of yellow fever virus (YFV) activity in the tropical regions of Africa and South America has sparked renewed interest in this infamous arboviral disease. Yellow fever virus had been a human plague for centuries prior to the identification of its urban transmission vector, the Aedes (Stegomyia) aegypti (Linnaeus) mosquito species, and the development of an efficient live-attenuated vaccine, the YF-17D strain. The combination of vector-control measures and vaccination campaigns drastically reduced YFV incidence in humans on many occasions, but the virus never ceased to circulate in the forest, through its sylvatic invertebrate vector(s) and vertebrate host(s). Outbreaks recently reported in Central Africa (2015⁻2016) and Brazil (since late 2016), reached considerable proportions in terms of spatial distribution and total numbers of cases, with multiple exports, including to China. In turn, questions about the likeliness of occurrence of large urban YFV outbreaks in the Americas or of a successful import of YFV to Asia are currently resurfacing. This two-part review describes the current state of knowledge and gaps regarding the molecular biology and transmission dynamics of YFV, along with an overview of the tools that can be used to manage the disease at individual, local and global levels.
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Affiliation(s)
- Raphaëlle Klitting
- Unité des Virus Émergents (UVE: Aix-Marseille Université, IRD 190, Inserm 1207, IHU Méditerranée Infection), 13385 Marseille Cedex 05, France.
| | - Ernest A Gould
- Unité des Virus Émergents (UVE: Aix-Marseille Université, IRD 190, Inserm 1207, IHU Méditerranée Infection), 13385 Marseille Cedex 05, France.
| | - Christophe Paupy
- UMR Maladies Infectieuses et Vecteurs: Écologie, Génétique Évolution et Contrôle (MIVEGEC: IRD, CNRS, Université Montpellier), 34394 Montpellier, France.
| | - Xavier de Lamballerie
- Unité des Virus Émergents (UVE: Aix-Marseille Université, IRD 190, Inserm 1207, IHU Méditerranée Infection), 13385 Marseille Cedex 05, France.
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Gossner CM, Ducheyne E, Schaffner F. Increased risk for autochthonous vector-borne infections transmitted by Aedes albopictus in continental Europe. Euro Surveill 2018; 23:1800268. [PMID: 29921345 PMCID: PMC6152200 DOI: 10.2807/1560-7917.es.2018.23.24.1800268] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Accepted: 06/14/2018] [Indexed: 11/23/2022] Open
Abstract
Autochthonous outbreaks of chikungunya and dengue during the past decade showed that continental Europe is vulnerable to Aedes albopictus-borne infections. Ae. albopictus has spread geographically, resulting in more people exposed to risk. Timely application of adequate mosquito suppression measures may delay, or even prevent, the vector population from crossing the potential epidemic abundance threshold should a pathogen be introduced. Health authorities should be on alert to detect early cases to prevent autochthonous outbreaks.
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Affiliation(s)
- Céline M Gossner
- European Centre for Disease Prevention and Control, Solna, Sweden
| | | | - Francis Schaffner
- Francis Schaffner Consultancy, Riehen, Switzerland
- National Centre for Vector Entomology, Institute of Parasitology, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
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28
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Brent SE, Watts A, Cetron M, German M, Kraemer MUG, Bogoch II, Brady OJ, Hay SI, Creatore MI, Khan K. International travel between global urban centres vulnerable to yellow fever transmission. Bull World Health Organ 2018; 96:343-354B. [PMID: 29875519 PMCID: PMC5985425 DOI: 10.2471/blt.17.205658] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 02/27/2018] [Accepted: 03/06/2018] [Indexed: 11/27/2022] Open
Abstract
OBJECTIVE To examine the potential for international travel to spread yellow fever virus to cities around the world. METHODS We obtained data on the international flight itineraries of travellers who departed yellow fever-endemic areas of the world in 2016 for cities either where yellow fever was endemic or which were suitable for viral transmission. Using a global ecological model of dengue virus transmission, we predicted the suitability of cities in non-endemic areas for yellow fever transmission. We obtained information on national entry requirements for yellow fever vaccination at travellers' destination cities. FINDINGS In 2016, 45.2 million international air travellers departed from yellow fever-endemic areas of the world. Of 11.7 million travellers with destinations in 472 cities where yellow fever was not endemic but which were suitable for virus transmission, 7.7 million (65.7%) were not required to provide proof of vaccination upon arrival. Brazil, China, India, Mexico, Peru and the United States of America had the highest volumes of travellers arriving from yellow fever-endemic areas and the largest populations living in cities suitable for yellow fever transmission. CONCLUSION Each year millions of travellers depart from yellow fever-endemic areas of the world for cities in non-endemic areas that appear suitable for viral transmission without having to provide proof of vaccination. Rapid global changes in human mobility and urbanization make it vital for countries to re-examine their vaccination policies and practices to prevent urban yellow fever epidemics.
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Affiliation(s)
- Shannon E Brent
- Li Ka Shing Knowledge Institute, St. Michael's Hospital, 30 Bond Street, Toronto, Ontario, M5B 1W8, Canada
| | - Alexander Watts
- Li Ka Shing Knowledge Institute, St. Michael's Hospital, 30 Bond Street, Toronto, Ontario, M5B 1W8, Canada
| | - Martin Cetron
- Division of Global Migration and Quarantine, National Center for Emerging and Zoonotic Infectious Diseases, Atlanta, United States of America (USA)
| | - Matthew German
- Li Ka Shing Knowledge Institute, St. Michael's Hospital, 30 Bond Street, Toronto, Ontario, M5B 1W8, Canada
| | - Moritz UG Kraemer
- Computational Epidemiology Laboratory, Boston Children’s Hospital, Boston, USA
| | - Isaac I Bogoch
- Divisions of General Internal Medicine and Infectious Diseases, University Health Network, Toronto, Canada
| | - Oliver J Brady
- Centre for the Mathematical Modelling of Infectious Diseases, London School of Hygiene and Tropical Medicine, London, England
| | - Simon I Hay
- Institute for Health Metrics and Evaluation, University of Washington, Seattle, USA
| | - Maria I Creatore
- Dalla Lana School of Public Health, University of Toronto, Toronto, Canada
| | - Kamran Khan
- Li Ka Shing Knowledge Institute, St. Michael's Hospital, 30 Bond Street, Toronto, Ontario, M5B 1W8, Canada
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Guo Y, Song Z, Luo L, Wang Q, Zhou G, Yang D, Zhong D, Zheng X. Molecular evidence for new sympatric cryptic species of Aedes albopictus (Diptera: Culicidae) in China: A new threat from Aedes albopictus subgroup? Parasit Vectors 2018; 11:228. [PMID: 29618379 PMCID: PMC5885320 DOI: 10.1186/s13071-018-2814-8] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Accepted: 03/25/2018] [Indexed: 11/22/2022] Open
Abstract
Background Aedes (Stegomyia) albopictus (Skuse) is an indigenous species and the predominant vector of dengue fever in China. Understanding of genetic diversity and structure of the mosquito would facilitate dengue prevention and vector control. Sympatric cryptic species have been identified in the Ae. albopictus subgroup in Southeast Asia; however, little is known about the presence and distribution of cryptic species in China. This study aimed to examine the genetic diversity, evaluate potential new cryptic sibling species, and assess the prevalence of Wolbachia infections in field populations. Methods Aedes adult female specimens were collected from five provinces in southern and central China during 2015–2016. Morphological identification was performed under dissection microscope. The mitochondrial DNA cytochrome c oxidase subunit 1 (cox1, DNA barcoding) locus and the ribosomal DNA internal transcribed spacer region 2 (ITS2) marker were used to examine the genetic variation, evaluate cryptic sibling species, and population structure in the field populations. Screening for the presence of Wolbachia was performed using multiplex PCR. Results A total of 140 individual specimens with morphological characteristics similar to Ae. albopictus were sequenced for DNA barcoding. Among these, 129 specimens (92.1%) were confirmed and identified as Ae. albopictus. The remaining 11 specimens, from 2 provinces, were identified as 2 distinct sequence groups, which were confirmed by ITS2 marker sequencing, suggesting the existence of potential cryptic species of Ae. albopictus. In Ae. albopictus, we found significant genetic differentiation and population structure between populations collected from different climate zones. Medium to high frequencies of Wolbachia infections were observed in natural Ae. albopictus populations, whereas Wolbachia was infrequent or absent in cryptic species populations. Conclusions Our findings highlight the population differentiation by climate zone and the presence of novel, cryptic Aedes species in China. The low prevalence of Wolbachia infections in cryptic species populations could reflect either a recent invasion of Wolbachia in Ae. albopictus or different host immune responses to this symbiont in the cryptic species. The study provides useful information for vector control and host-symbiont coevolution. Further study is needed to investigate the potential for arbovirus infection and disease transmission in the emerged cryptic species. Electronic supplementary material The online version of this article (10.1186/s13071-018-2814-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Yuyan Guo
- Department of Pathogen Biology, School of Public Health, Southern Medical University, Guangzhou, Guangdong, China
| | - Zhangyao Song
- Department of Pathogen Biology, School of Public Health, Southern Medical University, Guangzhou, Guangdong, China
| | - Lei Luo
- Department of Disinfection and Pesticide of Center for Disease Control and Prevention of Guangzhou, Guangzhou, Guangdong, China
| | - Qingmin Wang
- Department of Epidemiology and Health Statistics, School of Public Health, Guizhou Medical University, Guiyang, Guizhou, China
| | - Guofa Zhou
- Program in Public Health School of Medicine, University of California, Irvine, California, USA
| | - Dizi Yang
- Department of Pathogen Biology, School of Public Health, Southern Medical University, Guangzhou, Guangdong, China
| | - Daibin Zhong
- Program in Public Health School of Medicine, University of California, Irvine, California, USA
| | - Xueli Zheng
- Department of Pathogen Biology, School of Public Health, Southern Medical University, Guangzhou, Guangdong, China.
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Abstract
Climate change is expected to impact across every domain of society, including health. The majority of the world's population is susceptible to pathological, infectious disease whose life cycles are sensitive to environmental factors across different physical phases including air, water and soil. Nearly all so-called neglected tropical diseases (NTDs) fall into this category, meaning that future geographic patterns of transmission of dozens of infections are likely to be affected by climate change over the short (seasonal), medium (annual) and long (decadal) term. This review offers an introduction into the terms and processes deployed in modelling climate change and reviews the state of the art in terms of research into how climate change may affect future transmission of NTDs. The 34 infections included in this chapter are drawn from the WHO NTD list and the WHO blueprint list of priority diseases. For the majority of infections, some evidence is available of which environmental factors contribute to the population biology of parasites, vectors and zoonotic hosts. There is a general paucity of published research on the potential effects of decadal climate change, with some exceptions, mainly in vector-borne diseases.
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Affiliation(s)
- Mark Booth
- Newcastle University, Institute of Health and Society, Newcastle upon Tyne, United Kingdom.
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Akhoundi M, Jourdain F, Chandre F, Delaunay P, Roiz D. Effectiveness of a field trap barrier system for controlling Aedes albopictus: a "removal trapping" strategy. Parasit Vectors 2018; 11:101. [PMID: 29463300 PMCID: PMC5819175 DOI: 10.1186/s13071-018-2691-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Accepted: 01/31/2018] [Indexed: 12/26/2022] Open
Abstract
Background Aedes aegypti and Aedes albopictus are the main vectors for the transmission of several viral pathogens, in particular, dengue, Zika and chikungunya. In the absence of vaccines and treatment, control of Aedes mosquitoes is the only means of keeping these diseases in check. Aedes control is difficult, and it is, therefore, necessary to evaluate the efficacy of novel control methods, particularly those targeting adult and exophilic Ae. albopictus populations. Methods We carried out the first evaluation of the effectiveness of a field trap barrier system, i.e. a “removal trapping” outdoor control strategy for Ae. albopictus in southern France. Results The removal trapping control strategy is an effective system, able to reduce to almost zero the biting rate of the tiger mosquito in and around houses with traps installed. This strategy has the advantage of being a non-chemical method, which is environmentally friendly and does not affect non-target fauna. Nevertheless, it has several constraints including the cost of the CO2 required for the system to function. However, the system could be optimized by reducing the costs and combining it with other control strategies within the framework of integrated vector management. Conclusions We provide the first evidence of the effectiveness of this trap barrier system, which is based on the combined effect of (i) removing adult mosquitoes living in the area, and (ii) hampering the migration of mosquitoes from outside into the treated area. Further investigation is needed to understand its efficacy for other species, other locations and at-risk communities, and to evaluate its application for reducing the prevalence of dengue, Zika and chikungunya diseases. Electronic supplementary material The online version of this article (10.1186/s13071-018-2691-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Mohammad Akhoundi
- Service Parasitologie-Mycologie, Hôpital de l'Archet, CHU de Nice, Nice, France. .,MIVEGEC, UMR IRD224-CNRS5290-Université de Montpellier, Montpellier, France.
| | | | - Fabrice Chandre
- MIVEGEC, UMR IRD224-CNRS5290-Université de Montpellier, Montpellier, France.,Centre National d'Expertise sur les Vecteurs, Montpellier, France
| | - Pascal Delaunay
- Service Parasitologie-Mycologie, Hôpital de l'Archet, CHU de Nice, Nice, France.,MIVEGEC, UMR IRD224-CNRS5290-Université de Montpellier, Montpellier, France
| | - David Roiz
- MIVEGEC, UMR IRD224-CNRS5290-Université de Montpellier, Montpellier, France
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Ponce P, Morales D, Argoti A, Cevallos VE. First Report of Aedes (Stegomyia) albopictus (Skuse) (Diptera: Culicidae), the Asian Tiger Mosquito, in Ecuador. JOURNAL OF MEDICAL ENTOMOLOGY 2018; 55:248-249. [PMID: 29029173 PMCID: PMC5850216 DOI: 10.1093/jme/tjx165] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Indexed: 06/07/2023]
Abstract
Aedes (Stegomyia) albopictus (Skuse), (Diptera: Culicidae), the Asian tiger mosquito, is one of the most widespread invasive vector-borne disease insect in tropical and temperate zones. This species has invaded the Americas over the past 3 decades and has spread to six countries. We report Ae. albopictus in Guayaquil city, the first time it has been identified in Ecuador. Outdoor BG-Sentinel traps without lures collected a total of 21 Ae. albopictus.
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Affiliation(s)
- Patricio Ponce
- Universidad Yachay Tech, Escuela de Ciencias Biológicas e Ingeniería, Urcuquí, Ecuador
- Instituto de Biomedicina, Facultad de Biología, Universidad Central del Ecuador, Quito, Ecuador
| | - Diego Morales
- Instituto Nacional de Investigación en Salud Pública, Centro de Investigación y Referencia de Vectores, Quito, Ecuador
| | - Adriana Argoti
- Instituto Nacional de Investigación en Salud Pública, Centro de Investigación y Referencia de Vectores, Quito, Ecuador
| | - Varsovia E Cevallos
- Instituto Nacional de Investigación en Salud Pública, Centro de Investigación y Referencia de Vectores, Quito, Ecuador
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Johnson TL, Haque U, Monaghan AJ, Eisen L, Hahn MB, Hayden MH, Savage HM, McAllister J, Mutebi JP, Eisen RJ. Modeling the Environmental Suitability for Aedes (Stegomyia) aegypti and Aedes (Stegomyia) albopictus (Diptera: Culicidae) in the Contiguous United States. JOURNAL OF MEDICAL ENTOMOLOGY 2017; 54:1605-1614. [PMID: 29029153 PMCID: PMC5868335 DOI: 10.1093/jme/tjx163] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Indexed: 05/07/2023]
Abstract
The mosquitoes Aedes (Stegomyia) aegypti (L.)(Diptera:Culicidae) and Ae. (Stegomyia) albopictus (Skuse) (Diptera:Culicidae) transmit dengue, chikungunya, and Zika viruses and represent a growing public health threat in parts of the United States where they are established. To complement existing mosquito presence records based on discontinuous, non-systematic surveillance efforts, we developed county-scale environmental suitability maps for both species using maximum entropy modeling to fit climatic variables to county presence records from 1960-2016 in the contiguous United States. The predictive models for Ae. aegypti and Ae. albopictus had an overall accuracy of 0.84 and 0.85, respectively. Cumulative growing degree days (GDDs) during the winter months, an indicator of overall warmth, was the most important predictive variable for both species and was positively associated with environmental suitability. The number (percentage) of counties classified as environmentally suitable, based on models with 90 or 99% sensitivity, ranged from 1,443 (46%) to 2,209 (71%) for Ae. aegypti and from 1,726 (55%) to 2,329 (75%) for Ae. albopictus. Increasing model sensitivity results in more counties classified as suitable, at least for summer survival, from which there are no mosquito records. We anticipate that Ae. aegypti and Ae. albopictus will be found more commonly in counties classified as suitable based on the lower 90% sensitivity threshold compared with the higher 99% threshold. Counties predicted suitable with 90% sensitivity should therefore be a top priority for expanded mosquito surveillance efforts while still keeping in mind that Ae. aegypti and Ae. albopictus may be introduced, via accidental transport of eggs or immatures, and potentially proliferate during the warmest part of the year anywhere within the geographic areas delineated by the 99% sensitivity model.
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Affiliation(s)
- Tammi L. Johnson
- Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, 3156 Rampart Road, Fort Collins, CO 80521
| | - Ubydul Haque
- National Center for Atmospheric Research, P.O. Box 3000, Boulder, CO 80307
| | - Andrew J. Monaghan
- National Center for Atmospheric Research, P.O. Box 3000, Boulder, CO 80307
| | - Lars Eisen
- Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, 3156 Rampart Road, Fort Collins, CO 80521
| | - Micah B. Hahn
- Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, 3156 Rampart Road, Fort Collins, CO 80521
| | - Mary H. Hayden
- National Center for Atmospheric Research, P.O. Box 3000, Boulder, CO 80307
| | - Harry M. Savage
- Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, 3156 Rampart Road, Fort Collins, CO 80521
| | - Janet McAllister
- Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, 3156 Rampart Road, Fort Collins, CO 80521
| | - John-Paul Mutebi
- Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, 3156 Rampart Road, Fort Collins, CO 80521
| | - Rebecca J. Eisen
- Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, 3156 Rampart Road, Fort Collins, CO 80521
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Wouthuyzen-Bakker M, Knoester M, van den Berg AP, GeurtsvanKessel CH, Koopmans MP, Van Leer-Buter C, Oude Velthuis B, Pas SD, Ruijs WL, Schmidt-Chanasit J, Vreden SG, van der Werf TS, Reusken CB, Bierman WF. Yellow fever in a traveller returning from Suriname to the Netherlands, March 2017. ACTA ACUST UNITED AC 2017; 22:30488. [PMID: 28333617 PMCID: PMC5356427 DOI: 10.2807/1560-7917.es.2017.22.11.30488] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 03/16/2017] [Indexed: 11/23/2022]
Abstract
A Dutch traveller returning from Suriname in early March 2017, presented with fever and severe acute liver injury. Yellow fever was diagnosed by (q)RT-PCR and sequencing. During hospital stay, the patient’s condition deteriorated and she developed hepatic encephalopathy requiring transfer to the intensive care. Although yellow fever has not been reported in the last four decades in Suriname, vaccination is recommended by the World Health Organization for visitors to this country.
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Affiliation(s)
- Marjan Wouthuyzen-Bakker
- University of Groningen, University Medical Center Groningen, Department of Internal Medicine / Infectious Diseases, Groningen, The Netherlands.,These authors contributed equally to this work
| | - Marjolein Knoester
- These authors contributed equally to this work.,University of Groningen, University Medical Center Groningen, Department of Medical Microbiology and Infection Prevention, Groningen, The Netherlands
| | - Aad P van den Berg
- University of Groningen, University Medical Center Groningen, Department of Gastroenterology & Hepatology, Groningen, The Netherlands
| | - Corine H GeurtsvanKessel
- Erasmus MC, Department of Viroscience, WHO Collaborating Centre for Arbovirus and Haemorrhagic Fever Reference and Research, Rotterdam, The Netherlands
| | - Marion Pg Koopmans
- Erasmus MC, Department of Viroscience, WHO Collaborating Centre for Arbovirus and Haemorrhagic Fever Reference and Research, Rotterdam, The Netherlands
| | - Coretta Van Leer-Buter
- University of Groningen, University Medical Center Groningen, Department of Medical Microbiology and Infection Prevention, Groningen, The Netherlands
| | - Bob Oude Velthuis
- University of Groningen, University Medical Center Groningen, Department of Critical Care, Groningen, The Netherlands
| | - Suzan D Pas
- Erasmus MC, Department of Viroscience, WHO Collaborating Centre for Arbovirus and Haemorrhagic Fever Reference and Research, Rotterdam, The Netherlands
| | - Wilhelmina Lm Ruijs
- National Coordination Centre for Communicable Disease Control, Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands
| | - Jonas Schmidt-Chanasit
- Bernhard Nocht Institute for Tropical Medicine, WHO Collaborating Centre for Arbovirus and Haemorrhagic Fever Reference and Research, Hamburg, Germany.,German Centre for Infection Research (DZIF), partner site Hamburg-Luebeck-Borstel, Hamburg, Germany
| | - Stephen Gs Vreden
- Academic Hospital Paramaribo, Department of Internal Medicine and Infectious Diseases, Paramaribo, Suriname
| | - Tjip S van der Werf
- University of Groningen, University Medical Center Groningen, Department of Internal Medicine / Infectious Diseases, Groningen, The Netherlands
| | - Chantal Bem Reusken
- Erasmus MC, Department of Viroscience, WHO Collaborating Centre for Arbovirus and Haemorrhagic Fever Reference and Research, Rotterdam, The Netherlands
| | - Wouter Fw Bierman
- University of Groningen, University Medical Center Groningen, Department of Internal Medicine / Infectious Diseases, Groningen, The Netherlands
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