101
|
Ngwe Tun MM, Muta Y, Inoue S, Morita K. Persistence of Neutralizing Antibody Against Dengue Virus 2 After 70 Years from Infection in Nagasaki. Biores Open Access 2016; 5:188-91. [PMID: 27493841 PMCID: PMC4971407 DOI: 10.1089/biores.2016.0016] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
This study aimed to investigate the duration of humoral immune responses to dengue virus (DENV) infection in Japanese who experienced acute febrile illness with hemorrhagic manifestations 70 years ago, when an epidemic of dengue occurred in Nagasaki, Japan, from 1942 to 1944. A Japanese volunteer requested serological diagnosis of DENV infection in 2014 and donated blood sample to measure the antibody titer against DENV by antiflavi IgG indirect ELISA, focus reduction neutralization test, and plaque reduction neutralization test. The serum sample of the volunteer was positive in flavi IgG ELISA and it indicated primary infection. In the neutralization test, the highest neutralizing titer was ≥218 for DENV-2. We report here the existence of DENV-specific antibodies in the serum of a person after 70 years from infection. Published reports indicated that DENV-1 was responsible for the 1942-1944 outbreak in Nagasaki. However, our data suggested that DENV-2 also played a role in this Nagasaki dengue epidemic.
Collapse
Affiliation(s)
- Mya Myat Ngwe Tun
- Department of Virology, Institute of Tropical Medicine, Leading Graduate School Program, Nagasaki University, Nagasaki, Japan
| | | | - Shingo Inoue
- Department of Virology, Institute of Tropical Medicine, Leading Graduate School Program, Nagasaki University, Nagasaki, Japan
| | - Kouichi Morita
- Department of Virology, Institute of Tropical Medicine, Leading Graduate School Program, Nagasaki University, Nagasaki, Japan
| |
Collapse
|
102
|
Yamashita A, Sakamoto T, Sekizuka T, Kato K, Takasaki T, Kuroda M. DGV: Dengue Genographic Viewer. Front Microbiol 2016; 7:875. [PMID: 27375595 PMCID: PMC4894901 DOI: 10.3389/fmicb.2016.00875] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Accepted: 05/24/2016] [Indexed: 01/23/2023] Open
Abstract
Dengue viruses (DENVs) and their vectors are widely distributed throughout the tropical and subtropical regions of the world. An autochthonous case of DENV was reported in Tokyo, Japan, in 2014, for the first time in 70 years. A comprehensive database of DENV sequences containing both serotype and genotype data and epidemiological data is crucial to trace DENV outbreak isolates and promptly respond to outbreaks. We constructed a DENV database containing the serotype, genotype, year and country/region of collection by collecting all publically available DENV sequence information from the National Center for Biotechnology Information (NCBI) and assigning genotype information. We also implemented the web service Dengue Genographic Viewer (DGV), which shows the geographical distribution of each DENV genotype in a user-specified time span. DGV also assigns the serotype and genotype to a user-specified sequence by performing a homology search against the curated DENV database, and shows its homologous sequences with the geographical position and year of collection. DGV also shows the distribution of DENV-infected entrants to Japan by plotting epidemiological data from the Infectious Agents Surveillance Report (IASR), Japan. This overview of the DENV genotype distribution may aid in planning for the control of DENV infections. DGV is freely available online at: (https://gph.niid.go.jp/geograph/dengue/content/genomemap).
Collapse
Affiliation(s)
- Akifumi Yamashita
- Pathogen Genomics Center, National Institute of Infectious Diseases Tokyo, Japan
| | - Tetsuya Sakamoto
- Pathogen Genomics Center, National Institute of Infectious DiseasesTokyo, Japan; Remote Operations Services Department, CTC System Management CorporationTokyo, Japan
| | - Tsuyoshi Sekizuka
- Pathogen Genomics Center, National Institute of Infectious Diseases Tokyo, Japan
| | - Kengo Kato
- Pathogen Genomics Center, National Institute of Infectious Diseases Tokyo, Japan
| | - Tomohiko Takasaki
- Department of Virology I, National Institute of Infectious Diseases Tokyo, Japan
| | - Makoto Kuroda
- Pathogen Genomics Center, National Institute of Infectious Diseases Tokyo, Japan
| |
Collapse
|
103
|
Two different dengue virus strains in the Japanese epidemics of 2014. Virus Genes 2016; 52:722-6. [PMID: 27229877 DOI: 10.1007/s11262-016-1356-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Accepted: 05/10/2016] [Indexed: 10/21/2022]
Abstract
In late August 2014, dengue cases were reported in Japan, and a total of 162 cases were confirmed. In the present study, the envelope (E) gene sequences of 12 specimens from the dengue patients were determined. A dengue virus serotype 1 (DENV1) strain (D1/Hu/Shizuoka/NIID181/2014), which was clearly different from the first reported strain (D1/Hu/Saitama/NIID100/2014), was identified, although the other 11 specimens showed the same nucleotide sequences as D1/Hu/Saitama/NIID100/2014. The E gene sequences of two different strains were compared with those of nine DENV1 strains of imported cases in Japan in 2014. Phylogenetic analysis based on the E gene sequences showed that the D1/Hu/Saitama/NIID100/2014 strain was closely related to a strain isolated from an imported case from Singapore. Although no strain closely related to D1/Hu/Shizuoka/NIID181/2014 was found in these imported strains, the strain was closely related to isolates in Thailand and Taiwan in 2009. These data indicate that the dengue cases in Japan were caused by two different dengue virus strains that entered Japan through different means.
Collapse
|
104
|
Misslin R, Telle O, Daudé E, Vaguet A, Paul RE. Urban climate versus global climate change-what makes the difference for dengue? Ann N Y Acad Sci 2016; 1382:56-72. [PMID: 27197685 DOI: 10.1111/nyas.13084] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Revised: 03/18/2016] [Accepted: 04/07/2016] [Indexed: 12/18/2022]
Abstract
The expansion in the geographical distribution of vector-borne diseases is a much emphasized consequence of climate change, as are the consequences of urbanization for diseases that are already endemic, which may be even more important for public health. In this paper, we focus on dengue, the most widespread urban vector-borne disease. Largely urban with a tropical/subtropical distribution and vectored by a domesticated mosquito, Aedes aegypti, dengue poses a serious public health threat. Temperature plays a determinant role in dengue epidemic potential, affecting crucial parts of the mosquito and viral life cycles. The urban predilection of the mosquito species will further exacerbate the impact of global temperature change because of the urban heat island effect. Even within a city, temperatures can vary by 10 °C according to urban land use, and diurnal temperature range (DTR) can be even greater. DTR has been shown to contribute significantly to dengue epidemic potential. Unraveling the importance of within-city temperature is as important for dengue as for the negative health consequences of high temperatures that have thus far been emphasized, for example, pollution and heat stroke. Urban and landscape planning designed to mitigate the non-infectious negative effects of temperature should additionally focus on dengue, which is currently spreading worldwide with no signs of respite.
Collapse
Affiliation(s)
- Renaud Misslin
- Centre National de la Recherche Scientifique, UMR 6266 IDEES, Rouen, France
| | - Olivier Telle
- Centre des Sciences Humaines, UMIFRE 20 CNRS-MAE, Delhi, India.,Centre National de la Recherche Scientifique, UMR 8504 Geographie-cités, Paris, France
| | - Eric Daudé
- Centre des Sciences Humaines, UMIFRE 20 CNRS-MAE, Delhi, India
| | - Alain Vaguet
- Centre National de la Recherche Scientifique, UMR 6266 IDEES, Rouen, France
| | - Richard E Paul
- Institut Pasteur, Unité de la Génétique Fonctionnelle des Maladies Infectieuses, Paris, France.,Centre National de la Recherche Scientifique, Unité de Recherche Associée 3012, Paris, France
| |
Collapse
|
105
|
Tajima S, Nakayama E, Kotaki A, Moi ML, Ikeda M, Yagasaki K, Saito Y, Shibasaki KI, Saijo M, Takasaki T. Whole Genome Sequencing-Based Molecular Epidemiologic Analysis of Autochthonous Dengue Virus Type 1 Strains Circulating in Japan in 2014. Jpn J Infect Dis 2016; 70:45-49. [PMID: 27169954 DOI: 10.7883/yoken.jjid.2016.086] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Cases of autochthonous infections of dengue virus type 1 (DENV-1) were detected in Japan after a 70-year period devoid of dengue outbreaks. We previously showed that E gene sequences are identical in 11 of the 12 DENV-1 strains autochthonous to Japan. However, the E sequence represents only 14% of the DENV-1 genome. In the present study, we have sequenced the entire genome of 6 autochthonous DENV-1 strains that were isolated from patients during the 2014 outbreak. Sequencing of 5 Yoyogi group strains with identical E sequences and 1 Shizuoka strain with a different E sequence revealed that the first Yoyogi group strain differed from the Shizuoka strain by 18 amino acid residues. Furthermore, 2 Yoyogi group strains had different genomic sequences while the other 3 had identical genomes. Phylogenetic analyses indicated that the Hyogo strain, a Yoyogi group strain, was the first to diverge from the other 4 Yoyogi group strains. The E gene sequence of the Yoyogi group strains exhibits the highest homology to those of the strains isolated in Malaysia and Singapore between 2013 and 2014. The patient infected with the Hyogo strain visited Malaysia before the onset of dengue fever, suggesting that this was a case of dengue infection imported from Malaysia.
Collapse
Affiliation(s)
- Shigeru Tajima
- Department of Virology I, National Institute of Infectious Diseases
| | | | | | | | | | | | | | | | | | | |
Collapse
|
106
|
Messina JP, Kraemer MU, Brady OJ, Pigott DM, Shearer FM, Weiss DJ, Golding N, Ruktanonchai CW, Gething PW, Cohn E, Brownstein JS, Khan K, Tatem AJ, Jaenisch T, Murray CJ, Marinho F, Scott TW, Hay SI. Mapping global environmental suitability for Zika virus. eLife 2016; 5. [PMID: 27090089 PMCID: PMC4889326 DOI: 10.7554/elife.15272] [Citation(s) in RCA: 235] [Impact Index Per Article: 29.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Accepted: 04/10/2016] [Indexed: 01/07/2023] Open
Abstract
Zika virus was discovered in Uganda in 1947 and is transmitted by Aedes mosquitoes, which also act as vectors for dengue and chikungunya viruses throughout much of the tropical world. In 2007, an outbreak in the Federated States of Micronesia sparked public health concern. In 2013, the virus began to spread across other parts of Oceania and in 2015, a large outbreak in Latin America began in Brazil. Possible associations with microcephaly and Guillain-Barré syndrome observed in this outbreak have raised concerns about continued global spread of Zika virus, prompting its declaration as a Public Health Emergency of International Concern by the World Health Organization. We conducted species distribution modelling to map environmental suitability for Zika. We show a large portion of tropical and sub-tropical regions globally have suitable environmental conditions with over 2.17 billion people inhabiting these areas. DOI:http://dx.doi.org/10.7554/eLife.15272.001 Zika virus is transmitted between humans by mosquitoes. The majority of infections cause mild flu-like symptoms, but neurological complications in adults and infants have been found in recent outbreaks. Although it was discovered in Uganda in 1947, Zika only caused sporadic infections in humans until 2007, when it caused a large outbreak in the Federated States of Micronesia. The virus later spread across Oceania, was first reported in Brazil in 2015 and has since rapidly spread across Latin America. This has led many people to question how far it will continue to spread. There was therefore a need to define the areas where the virus could be transmitted, including the human populations that might be risk in these areas. Messina et al. have now mapped the areas that provide conditions that are highly suitable for the spread of the Zika virus. These areas occur in many tropical and sub-tropical regions around the globe. The largest areas of risk in the Americas lie in Brazil, Colombia and Venezuela. Although Zika has yet to be reported in the USA, a large portion of the southeast region from Texas through to Florida is highly suitable for transmission. Much of sub-Saharan Africa (where several sporadic cases have been reported since the 1950s) also presents an environment that is highly suitable for the Zika virus. While no cases have yet been reported in India, a large portion of the subcontinent is also suitable for Zika transmission. Over 2 billion people live in Zika-suitable areas globally, and in the Americas alone, over 5.4 million births occurred in 2015 within such areas. It is important, however, to recognize that not all individuals living in suitable areas will necessarily be exposed to Zika. We still lack a great deal of basic epidemiological information about Zika. More needs to be known about the species of mosquito that spreads the disease and how the Zika virus interacts with related viruses such as dengue. As such information becomes available and clinical cases become routinely diagnosed, the global evidence base will be strengthened, which will improve the accuracy of future maps. DOI:http://dx.doi.org/10.7554/eLife.15272.002
Collapse
Affiliation(s)
- Jane P Messina
- Department of Zoology, University of Oxford, Oxford, United Kingdom
| | | | - Oliver J Brady
- Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - David M Pigott
- Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, United Kingdom.,Institute for Health Metrics and Evaluation, University of Washington, Seattle, United States
| | - Freya M Shearer
- Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Daniel J Weiss
- Department of Zoology, University of Oxford, Oxford, United Kingdom
| | - Nick Golding
- Department of BioSciences, University of Melbourne, Parkville, United Kingdom
| | - Corrine W Ruktanonchai
- WorldPop project, Department of Geography and Environment, University of Southampton, Southampton, United Kingdom
| | - Peter W Gething
- Department of Zoology, University of Oxford, Oxford, United Kingdom
| | - Emily Cohn
- Boston Children's Hospital, Harvard Medical School, Boston, United Kingdom
| | - John S Brownstein
- Boston Children's Hospital, Harvard Medical School, Boston, United Kingdom
| | - Kamran Khan
- Department of Medicine, Division of Infectious Diseases, University of Toronto, Toronto, Canada.,Li Ka Shing Knowledge Institute, St Michael's Hospital, Toronto, Canada
| | - Andrew J Tatem
- WorldPop project, Department of Geography and Environment, University of Southampton, Southampton, United Kingdom.,Flowminder Foundation, Stockholm, Sweden
| | - Thomas Jaenisch
- Section Clinical Tropical Medicine, Department for Infectious Diseases, Heidelberg University Hospital, Heidelberg, Germany.,German Centre for Infection Research (DZIF), Heidelberg partner site, Heidelberg, Germany
| | - Christopher Jl Murray
- Institute for Health Metrics and Evaluation, University of Washington, Seattle, United States
| | - Fatima Marinho
- Secretariat of Health Surveillance, Ministry of Health Brazil, Brasilia, Brazil
| | - Thomas W Scott
- Department of Entomology and Nematology, University of California Davis, Davis, United States
| | - Simon I Hay
- Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, United Kingdom.,Institute for Health Metrics and Evaluation, University of Washington, Seattle, United States
| |
Collapse
|
107
|
Churrotin S, Kotaki T, Sucipto TH, Ahwanah NLF, Deka PT, Mulyatno KC, Utami DAP, Ranasasmita R, Soegijanto S, Kameoka M. Dengue Virus Type 1 Strain Isolated in Indonesia Shows a Close Phylogenetic Relation with the Strains That Caused the Autochthonous Dengue Outbreak in Japan in 2014. Jpn J Infect Dis 2016; 69:442-4. [PMID: 27000455 DOI: 10.7883/yoken.jjid.2015.516] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Siti Churrotin
- Indonesia-Japan Collaborative Research Center for Emerging and Re-emerging Infectious Diseases, Institute of Tropical Disease, Airlangga University
| | | | | | | | | | | | | | | | | | | |
Collapse
|
108
|
|
109
|
Moi ML, Takasaki T, Kurane I. Human antibody response to dengue virus: implications for dengue vaccine design. Trop Med Health 2016; 44:1. [PMID: 27398060 PMCID: PMC4934144 DOI: 10.1186/s41182-016-0004-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Accepted: 01/13/2016] [Indexed: 11/10/2022] Open
Abstract
Dengue, a global health threat, is a leading cause of morbidity and mortality in most tropical and subtropical countries. Dengue can range from asymptomatic, relatively mild dengue fever to severe and life-threatening dengue hemorrhagic fever. Disease severity and outcome is largely associated with the host immune response. Several candidate vaccines in clinical trials appear promising as effective measures for dengue disease control. Vaccine development has been hampered by safety and efficacy issues, driven by a lack of understanding of the host immune response. This review focuses on recent research findings on the dengue host immune response, particularly in humans, and the relevance of these findings to challenges in vaccine development.
Collapse
Affiliation(s)
- Meng Ling Moi
- />Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
- />National Institute of Infectious Diseases, Tokyo, Japan
| | | | - Ichiro Kurane
- />National Institute of Infectious Diseases, Tokyo, Japan
| |
Collapse
|
110
|
Wong SSY, Poon RWS, Wong SCY. Zika virus infection-the next wave after dengue? J Formos Med Assoc 2016; 115:226-42. [PMID: 26965962 DOI: 10.1016/j.jfma.2016.02.002] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Accepted: 02/17/2016] [Indexed: 01/10/2023] Open
Abstract
Zika virus was initially discovered in east Africa about 70 years ago and remained a neglected arboviral disease in Africa and Southeast Asia. The virus first came into the limelight in 2007 when it caused an outbreak in Micronesia. In the ensuing decade, it spread widely in other Pacific islands, after which its incursion into Brazil in 2015 led to a widespread epidemic in Latin America. In most infected patients the disease is relatively benign. Serious complications include Guillain-Barré syndrome and congenital infection which may lead to microcephaly and maculopathy. Aedes mosquitoes are the main vectors, in particular, Ae. aegypti. Ae. albopictus is another potential vector. Since the competent mosquito vectors are highly prevalent in most tropical and subtropical countries, introduction of the virus to these areas could readily result in endemic transmission of the disease. The priorities of control include reinforcing education of travellers to and residents of endemic areas, preventing further local transmission by vectors, and an integrated vector management programme. The container habitats of Ae. aegypti and Ae. albopictus means engagement of the community and citizens is of utmost importance to the success of vector control.
Collapse
Affiliation(s)
- Samson Sai-Yin Wong
- Department of Microbiology, Research Centre for Infection and Immunology, Faculty of Medicine, The University of Hong Kong, Hong Kong.
| | | | | |
Collapse
|
111
|
Sim S, Hibberd ML. Genomic approaches for understanding dengue: insights from the virus, vector, and host. Genome Biol 2016; 17:38. [PMID: 26931545 PMCID: PMC4774013 DOI: 10.1186/s13059-016-0907-2] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
The incidence and geographic range of dengue have increased dramatically in recent decades. Climate change, rapid urbanization and increased global travel have facilitated the spread of both efficient mosquito vectors and the four dengue virus serotypes between population centers. At the same time, significant advances in genomics approaches have provided insights into host–pathogen interactions, immunogenetics, and viral evolution in both humans and mosquitoes. Here, we review these advances and the innovative treatment and control strategies that they are inspiring.
Collapse
Affiliation(s)
- Shuzhen Sim
- Infectious Diseases, Genome Institute of Singapore, Singapore, 138672, Singapore
| | - Martin L Hibberd
- Infectious Diseases, Genome Institute of Singapore, Singapore, 138672, Singapore. .,Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, WC1E 7HT, UK.
| |
Collapse
|
112
|
WITHDRAWN: A disease around the corner. Osong Public Health Res Perspect 2016. [DOI: 10.1016/j.phrp.2016.01.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
113
|
Kondo M, Akachi S, Ando K, Nomura T, Yamanaka K, Mizutani H. Two Japanese siblings affected with Chikungunya fever with different clinical courses: Imported infections from the Cook Islands. J Dermatol 2016; 43:697-700. [PMID: 26813362 DOI: 10.1111/1346-8138.13253] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2015] [Accepted: 11/04/2015] [Indexed: 11/28/2022]
Abstract
Two Japanese siblings visited the Cook Islands on business and stayed for 2 months. The sister developed a high fever, arthralgia, erythema and leg edema on the day after returning to Japan. The brother also developed neck and joint pain on the day following the sister's onset. Subsequently, his erythematous lesions spread over his whole body. Chikungunya virus was detected from the sister's blood and urine by specific reverse transcription polymerase chain reaction, but not in the brother's samples. Retrospectively, his history of Chikungunya fever was confirmed by the presence of the anti-Chikungunya virus immunoglobulin (Ig)M and IgG antibodies using the specific enzyme-linked immunoassay. In Japan, no autochthonous case of Chikungunya fever was reported previously. We should give attention to the imported infectious diseases for epidemic prevention. This report warns about the danger of the imported infectious diseases, and also suggests that covering the topic of infectious disease in the world is critical to doctors as well as travelers.
Collapse
Affiliation(s)
- Makoto Kondo
- Department of Dermatology, Mie University Graduate School of Medicine, Mie, Japan
| | - Shigehiro Akachi
- Mie Prefecture Health and Environment Research Institute, Mie, Japan
| | - Katsuhiko Ando
- Department of Medical Zoology, Mie University Graduate School of Medicine, Mie, Japan
| | | | - Keiichi Yamanaka
- Department of Dermatology, Mie University Graduate School of Medicine, Mie, Japan
| | - Hitoshi Mizutani
- Department of Dermatology, Mie University Graduate School of Medicine, Mie, Japan
| |
Collapse
|
114
|
Quam MB, Sessions O, Kamaraj US, Rocklöv J, Wilder-Smith A. Dissecting Japan's Dengue Outbreak in 2014. Am J Trop Med Hyg 2015; 94:409-412. [PMID: 26711518 PMCID: PMC4751952 DOI: 10.4269/ajtmh.15-0468] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Accepted: 11/03/2015] [Indexed: 11/07/2022] Open
Abstract
Despite Japan's temperate climate, a dengue outbreak occurred in Tokyo for the first time in over 70 years in 2014. We dissected this dengue outbreak based on phylogenetic analysis, travel interconnectivity, and environmental drivers for dengue epidemics. Comparing the available dengue virus 1 (DENV1) E gene sequence from this outbreak with 3,282 unique DENV1 sequences in National Center for Biotechnology Information suggested that the DENV might have been imported from China, Indonesia, Singapore, or Vietnam. With travelers arriving into Japan, Guangzhou (China) may have been the source of DENV introduction, given that Guangzhou also reported a large-scale dengue outbreak in 2014. Coinciding with the 2014 outbreak, Tokyo's climate conditions permitted the amplification of Aedes vectors and the annual peak of vectorial capacity. Given suitable vectors and climate conditions in addition to increasing interconnectivity with endemic areas of Asia, Tokyo's 2014 outbreak did not come as a surprise and may foretell more to come.
Collapse
Affiliation(s)
- Mikkel B. Quam
- *Address correspondence to Mikkel B. Quam, Epidemiology and Global Health Unit, Department of Public Health and Clinical Medicine, Umeå University, SE-901 87 Umeå, Sweden. E-mail:
| | | | | | | | | |
Collapse
|
115
|
Jeong YE, Lee WC, Cho JE, Han MG, Lee WJ. Comparison of the Epidemiological Aspects of Imported Dengue Cases between Korea and Japan, 2006-2010. Osong Public Health Res Perspect 2015; 7:71-4. [PMID: 26981346 PMCID: PMC4776262 DOI: 10.1016/j.phrp.2015.12.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Revised: 10/30/2015] [Accepted: 12/01/2015] [Indexed: 11/29/2022] Open
Abstract
To compare the epidemiological characteristics of dengue cases imported by travelers or immigration in both Korea and Japan, we determined dengue incidence and related risk factors. During 2006–2010, 367 and 589 imported dengue cases were reported in Korea and Japan, respectively. In Korea, the presumptive origins for the dengue infections were Southeast Asia (82.6%), Southern Asia (13.9%), Eastern Asia (1.1%), South America (0.3%), Central America (0.3%), Africa (0.3%), and other countries (1.6%). In Japan, the origins of the infections were Southeast Asia (69.8%), Southern Asia (20.0%), Eastern Asia (1.7%), South America (2.5%), Central America (1.2%), Africa (1.2%), Oceania (2.4%), and other countries (1.2%). In both countries, more dengue cases were reported for men than for women (p < 0.01), and those aged 20–30 years accounted for > 60% of the total cases. The frequency of imported cases in summer and autumn (∼70% of total cases) was similar in both countries. This study demonstrates that there is a similar pattern of imported dengue cases in Korea and Japan. Therefore, there is a risk of an autochthonous dengue outbreak in Korea, as indicated by the recent outbreak in Japan in 2014.
Collapse
Affiliation(s)
- Young Eui Jeong
- Division of Arboviruses, National Institute of Health, Korea Centers for Disease Control and Prevention, Cheongju, Korea
| | - Won-Chang Lee
- College of Veterinary Medicine, Konkuk University, Seoul, Korea
| | - Jung Eun Cho
- Division of Arboviruses, National Institute of Health, Korea Centers for Disease Control and Prevention, Cheongju, Korea
| | - Myung-Guk Han
- Division of Arboviruses, National Institute of Health, Korea Centers for Disease Control and Prevention, Cheongju, Korea
| | - Won-Ja Lee
- Division of Arboviruses, National Institute of Health, Korea Centers for Disease Control and Prevention, Cheongju, Korea
| |
Collapse
|
116
|
Furuya H. Estimation of reproduction number and probable vector density of the first autochthonous dengue outbreak in Japan in the last 70 years. Environ Health Prev Med 2015; 20:466-71. [PMID: 26298188 DOI: 10.1007/s12199-015-0488-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Accepted: 08/05/2015] [Indexed: 11/24/2022] Open
Abstract
OBJECTIVES The first autochthonous case of dengue fever in Japan since 1945 was reported on August 27, 2014. Infection was transmitted by Aedes albopictus mosquitoes in Tokyo's Yoyogi Park. A total of 65 cases with no history of overseas travel and who may have been infected around the park were reported as of September 5, 2014. To quantify infection risk of the local epidemic, the reproduction number and vector density per person at the onset of the epidemic were estimated. METHODS The estimated probability distribution and the number of female mosquitoes per person (MPP) were determined from the data of the initial epidemic. RESULTS The estimated distribution R(0i) for the initial epidemic was fitted to a Gamma distribution using location parameter 4.25, scale parameter 0.19, and shape parameter 7.76 with median 7.78 and IQR (7.21-8.40). The MPP was fitted to a normal distribution with mean 5.71 and standard deviation 0.53. CONCLUSIONS Both estimated reproduction number and vector density per person at the onset of the epidemic were higher than previously reported values. These results indicate the potential for dengue outbreaks in places with elevated vector density per person, even in dengue non-endemic countries. To investigate the cause of this outbreak, further studies will be needed, including assessments of social, behavioral, and environmental factors that may have contributed to this epidemic by altering host and vector conditions in the park.
Collapse
Affiliation(s)
- Hiroyuki Furuya
- Basic Clinical Science and Public Health, Tokai University School of Medicine, 143 Shimokasuya, Isehara-shi, Kanagawa, 259-1193, Japan.
| |
Collapse
|
117
|
Imai K, Nakayama E, Maeda T, Mikita K, Kobayashi Y, Mitarai A, Honma Y, Miyake S, Kaku K, Miyahira Y, Kawana A. Chikungunya Fever in Japan Imported from the Caribbean Islands. Jpn J Infect Dis 2015; 69:151-3. [PMID: 26166501 DOI: 10.7883/yoken.jjid.2015.063] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A 53-year-old Japanese woman who was working as a volunteer in the Commonwealth of Dominica in the Caribbean islands presented with a high-grade fever and severe incapacitating generalized arthralgia. The Asian genotype of the chikungunya virus was confirmed using reverse transcription-PCR and serology, based on the presence of a specific neutralization titer and immunoglobulin M antibodies. She was diagnosed with post-chikungunya chronic arthritis based on persistence of her polyarthritis for 3 months and the presence of rheumatoid factor, immunoglobulin G-rheumatoid factor, and matrix metalloproteinase-3. Chikungunya virus should be considered as a causative pathogen in travelers returning from Caribbean islands. Clinicians should consider chikungunya fever in the differential diagnosis of patients who complain of chronic arthritis and have a history of travel to an endemic area.
Collapse
Affiliation(s)
- Kazuo Imai
- Division of Infectious Diseases and Pulmonary Medicine, National Defense Medical College
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
118
|
Virological confirmation of concurrent dengue virus serotypes 1 and 4 by virus isolation using Fc-gamma receptor-expressing BHK cells. Int J Infect Dis 2015; 33:177-8. [DOI: 10.1016/j.ijid.2015.02.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Revised: 01/26/2015] [Accepted: 02/03/2015] [Indexed: 11/19/2022] Open
|
119
|
Saito Y, Moi ML, Kotaki A, Ikeda M, Tajima S, Shiba H, Hosono K, Saijo M, Kurane I, Takasaki T. Detecting Dengue Virus Nonstructural Protein 1 (NS1) in Urine Samples Using ELISA for the Diagnosis of Dengue Virus Infection. Jpn J Infect Dis 2015; 68:455-60. [PMID: 25766601 DOI: 10.7883/yoken.jjid.2014.441] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Dengue virus (DENV) infection is a serious global health threat. For the surveillance and control of dengue, there is a need for robust diagnostic tools that are relatively easy to use and reliable in various clinical settings. We investigated the applicability of NS1 antigen detection in urine samples for the diagnosis of DENV. About 118 urine samples, obtained from 96 dengue patients at various phases of disease, were used for this study. NS1 antigen was detected by ELISA in the urine samples obtained from patients after 2-17 days of disease onset. Positive detection rates of NS1 antigen ranged between 13-43%. Based on real-time RT-PCR, positive detection rates of viral genome in the urine samples ranged between 20-33% on days 0 to ≥15. On days 11 to ≥15 after the disease onset, NS1 antigen was detected at similar rates in serum and urine samples. Additionally, NS1 antigen was detected in 2 urine samples, but not in the serum samples, on days 7 and 16 after the onset of the disease. The results confirm the applicability of NS1 antigen detection in urine samples using ELISA to diagnose acute DENV infection and suggests that the assay is potentially useful when only limited amounts of serum samples are available and in limited resource settings.
Collapse
Affiliation(s)
- Yuka Saito
- Department of Virology 1, National Institute of Infectious Diseases
| | | | | | | | | | | | | | | | | | | |
Collapse
|