1
|
Hakim MS, Annisa L, Aman AT. The evolution of chikungunya virus circulating in Indonesia: Sequence analysis of the orf2 gene encoding the viral structural proteins. Int Microbiol 2023; 26:781-790. [PMID: 36774411 DOI: 10.1007/s10123-023-00337-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 02/02/2023] [Accepted: 02/07/2023] [Indexed: 02/13/2023]
Abstract
Chikungunya virus (CHIKV) is an arthropod-borne virus that has caused several major epidemics globally, including in Indonesia. Although significant progress has been achieved in understanding the epidemiology and genotype circulation of CHIKV in Indonesia, the evolution of Indonesian CHIKV isolates is poorly understood. Thus, our study aimed to perform phylogenetic and mutation analyses of the orf2 gene encoding its viral structural protein to improve our understanding of CHIKV evolution in Indonesia. Complete orf2 gene sequences encoding the viral structural proteins of Indonesian-derived CHIKV were downloaded from GenBank until August 31, 2022. Various bioinformatics tools were employed to perform phylogenetic and mutation analyses of the orf2 gene. We identified 76 complete sequences of orf2 gene of CHIKV isolates originally derived from Indonesia. Maximum likelihood trees demonstrated that the majority (69/76, 90.8%) of Indonesian-derived CHIKV isolates belonged to the Asian genotype, while seven isolates (9.2%) belonged to the East/Central/South African (ECSA) genotype. The Indonesian-derived CHIKV isolates were calculated to be originated in Indonesia around 95 years ago (1927), with 95% highest posterior density (HPD) ranging from 1910 to 1942 and a nucleotide substitution rate of 5.07 × 10-4 (95% HPD: 3.59 × 10-4 to 6.67 × 10-4). Various synonymous and non-synonymous substitutions were identified in the C, E3, E2, 6K, and E1 genes. Most importantly, the E1-A226V mutation, which has been reported to increase viral adaptation in Aedes albopictus mosquitoes, was present in all ECSA isolates. To our knowledge, our study is the first comprehensive research analyzing the mutation and evolution of Indonesian-derived CHIKV based on complete sequences of the orf2 genes encoding its viral structural proteins. Our results clearly showed a dynamic evolution of CHIKV circulating in Indonesia.
Collapse
Affiliation(s)
- Mohamad S Hakim
- Department of Microbiology, Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Yogyakarta, 55281, Indonesia.
| | - Luthvia Annisa
- Department of Microbiology, Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Yogyakarta, 55281, Indonesia
| | - Abu T Aman
- Department of Microbiology, Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Yogyakarta, 55281, Indonesia
| |
Collapse
|
2
|
Kawonga F, Misinzo G, Pemba DF. Serological and molecular evidence of chikungunya virus infection among febrile outpatients seeking healthcare in Northern Malawi. Infect Ecol Epidemiol 2023; 13:2229573. [PMID: 37387776 PMCID: PMC10304438 DOI: 10.1080/20008686.2023.2229573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Accepted: 06/21/2023] [Indexed: 07/01/2023] Open
Abstract
Introduction: Despite global evidence of chikungunya fever (CHIKF) in humans that is caused by chikungunya virus (CHIKV), little is known about the occurrence of CHIKF in Malawi. This study was conducted to determine the seroprevalence of CHIKF and to molecularly confirm the presence of CHIKV ribonucleic acid (RNA) among febrile outpatients seeking health care at Mzuzu Central Hospital in the Northern Region of Malawi. Methods: Enzyme-immunosorbent assay (ELISA) was used to detect the presence or absence of specific antibodies against CHIKV. Reversetranscription polymerase chain reaction (RT-PCR) was conducted on randomly selected anti-CHIKV IgM-positive samples to detect CHIKV RNA. Results: Out of 119 CHIKF suspected samples analyzed, 73 tested positive for anti-CHIKV IgM antibodies, with an overall seroprevalence of 61.3%. Most of the CHIKV infected individuals presented with joint pain, abdominal pain, vomiting and nose bleeding with seroprevalence of 45.2%, 41.1%, 16.4% and 12.3%, respectively. All the randomly selected samples that were positive for CHIKV anti-IgM by ELISAhad detectable CHIKV RNA by RT-PCR. Conclusion: The presence of anti-CHIKV IgM antibodies suggests the presence of recent CHIKV infection. We therefore recommend for the inclusion of CHIKF as the differential diagnosis in febrile ill patients in Mzuzu city, Malawi.
Collapse
Affiliation(s)
- Flywell Kawonga
- Department of Veterinary Microbiology, Parasitology and Biotechnology, College of Veterinary Medicine and Biomedical Sciences, Sokoine University of Agriculture, Morogoro, Tanzania
- SACIDS African Centre of Excellence for Infectious Diseases of Humans and Animals, Sokoine University of Agriculture, Morogoro, Tanzania
- Malawi-Liverpool-Wellcome Trust Clinical Research Programme, Blantyre, Malawi
| | - Gerald Misinzo
- Department of Veterinary Microbiology, Parasitology and Biotechnology, College of Veterinary Medicine and Biomedical Sciences, Sokoine University of Agriculture, Morogoro, Tanzania
- SACIDS African Centre of Excellence for Infectious Diseases of Humans and Animals, Sokoine University of Agriculture, Morogoro, Tanzania
| | - Dylo Foster Pemba
- Vector Borne Disease Laboratory, University of Malawi, Zomba, Malawi
| |
Collapse
|
3
|
A. Jalloh M, Artika IM, P. Dewi Y, Syafruddin D, Idris I, B.B. Bernadus J, Telew A, S. Purwanto D, D. Rosita Y, Antonjaya U, S.A. Myint K. Seroprevalence of Chikungunya in an Asymptomatic Adult Population in North and South Sulawesi, Indonesia. Am J Trop Med Hyg 2023; 108:359-362. [PMID: 36535254 PMCID: PMC9896315 DOI: 10.4269/ajtmh.22-0328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 10/11/2022] [Indexed: 12/23/2022] Open
Abstract
Chikungunya (CHIK) is an emerging and reemerging infectious disease of public health importance in Indonesia. Information on the asymptomatic and true burden of CHIK virus (CHIKV) infections is limited. We assayed 1,092 healthy population samples, collected in North and South Sulawesi between 2019 and 2020, for antibodies against CHIKV. Blood samples were screened by IgM and IgG ELISAs and quantitative real-time reverse transcription polymerase chain reaction (qRT-PCR) assay. CHIKV IgG seroprevalence in North and South Sulawesi was 53.2% and 53.9%, respectively. The overall prevalence of anti-CHIKV IgM antibody was 12.9%. Molecular testing of blood donors revealed 0.66% (2/300) were positive for CHIKV qRT-PCR. Our study provides new insights into the CHIKV endemicity situation in the eastern part of Indonesia and warrants the need for further systematic surveillance considering there is no treatment or vaccine for CHIK infection.
Collapse
Affiliation(s)
- Mohammed A. Jalloh
- Department of Biochemistry, Faculty of Mathematics and Natural Sciences, Bogor Agricultural University, Bogor, Indonesia
| | - I Made Artika
- Department of Biochemistry, Faculty of Mathematics and Natural Sciences, Bogor Agricultural University, Bogor, Indonesia
| | - Yora P. Dewi
- Eijkman Institute for Molecular Biology, Jakarta, Indonesia
| | - Din Syafruddin
- Eijkman Institute for Molecular Biology, Jakarta, Indonesia
- Department of Parasitology, Faculty of Medicine, Hasanuddin University, Makassar, Indonesia
| | - Irfan Idris
- Department of Physiology, Faculty of Medicine, Hasanuddin University, Makassar, Indonesia
| | - Janno B.B. Bernadus
- Department of Parasitology, Faculty of Medicine, Sam Ratulangi University, Manado, Indonesia
| | | | - Diana S. Purwanto
- Department of Biochemistry, Faculty of Medicine, Sam Ratulangi University, Manado, Indonesia
| | - Yoeke D. Rosita
- Health Laboratory Center (Balai Besar Laboratorium Kesehatan), Makassar, Indonesia
| | - Ungke Antonjaya
- Eijkman Institute for Molecular Biology, Jakarta, Indonesia
- Eijkman-Oxford Clinical Research Unit, Eijkman Institute for Molecular Biology, Jakarta, Indonesia
| | | |
Collapse
|
4
|
Mayer AB, Consigny PH, Grobusch MP, Camprubí-Ferrer D, Huits R, Rothe C. Chikungunya in returning travellers from Bali - A GeoSentinel case series. Travel Med Infect Dis 2023; 52:102543. [PMID: 36682574 DOI: 10.1016/j.tmaid.2023.102543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 01/09/2023] [Accepted: 01/16/2023] [Indexed: 01/21/2023]
Affiliation(s)
- Anna Britta Mayer
- LMU Hospital Centre, Division of Infectious Diseases and Tropical Medicine, Munich, Germany.
| | - Paul-Henri Consigny
- Institut Pasteur, Centre Médical, Centre d'Infectiologie Necker-Pasteur, Paris, France
| | - Martin P Grobusch
- Centre of Tropical Medicine and Travel Medicine, Department of Infectious Diseases, Amsterdam Infection & Immunity, Amsterdam Public Health, Amsterdam University Medical Centres, location AMC, University of Amsterdam, Amsterdam, the Netherlands
| | | | - Ralph Huits
- Department of Infectious Tropical Diseases and Microbiology, IRCCS Sacro Cuore Don Calabria Hospital, Negrar, Verona, Italy
| | - Camilla Rothe
- LMU Hospital Centre, Division of Infectious Diseases and Tropical Medicine, Munich, Germany
| |
Collapse
|
5
|
Low Transmission of Chikungunya Virus by Aedes aegypti from Vientiane Capital, Lao PDR. Pathogens 2022; 12:pathogens12010031. [PMID: 36678379 PMCID: PMC9860973 DOI: 10.3390/pathogens12010031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 12/05/2022] [Accepted: 12/13/2022] [Indexed: 12/28/2022] Open
Abstract
In 2012−2013, chikungunya virus (CHIKV) was the cause of a major outbreak in the southern part of Lao People’s Democratic Republic (Lao PDR). Since then, only a few imported cases, with isolates belonging to different lineages, were recorded between 2014 and 2020 in Vientiane capital and few autochthonous cases of ECSA-IOL lineage were detected in the south of the country in 2020. The CHIKV epidemiological profile contrasts with the continuous and intensive circulation of dengue virus in the country, especially in Vientiane capital. The study’s aim was to investigate the ability of the local field-derived Aedes aegypti population from Vientiane capital to transmit the Asian and ECSA-IOL lineages of CHIKV. Our results revealed that, for both CHIKV lineages, infection rates were low and dissemination rates were high. The transmission rates and efficiencies evidenced a low vector competence for the CHIKV tested. Although this population of Ae. aegypti showed a relatively modest vector competence for these two CHIKV lineages, several other factors could influence arbovirus emergence such as the longevity and density of female mosquitoes. Due to the active circulation of CHIKV in Southeast Asia, investigations on these factors should be done to prevent the risk of CHIKV emergence and spread in Lao PDR and neighboring countries.
Collapse
|
6
|
Hakim MS, Aman AT. Understanding the Biology and Immune Pathogenesis of Chikungunya Virus Infection for Diagnostic and Vaccine Development. Viruses 2022; 15:48. [PMID: 36680088 PMCID: PMC9863735 DOI: 10.3390/v15010048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 12/18/2022] [Accepted: 12/21/2022] [Indexed: 12/28/2022] Open
Abstract
Chikungunya virus, the causative agent of chikungunya fever, is generally characterized by the sudden onset of symptoms, including fever, rash, myalgia, and headache. In some patients, acute chikungunya virus infection progresses to severe and chronic arthralgia that persists for years. Chikungunya infection is more commonly identified in tropical and subtropical regions. However, recent expansions and epidemics in the temperate regions have raised concerns about the future public health impact of chikungunya diseases. Several underlying factors have likely contributed to the recent re-emergence of chikungunya infection, including urbanization, human travel, viral adaptation to mosquito vectors, lack of effective control measures, and the spread of mosquito vectors to new regions. However, the true burden of chikungunya disease is most likely to be underestimated, particularly in developing countries, due to the lack of standard diagnostic assays and clinical manifestations overlapping with those of other endemic viral infections in the regions. Additionally, there have been no chikungunya vaccines available to prevent the infection. Thus, it is important to update our understanding of the immunopathogenesis of chikungunya infection, its clinical manifestations, the diagnosis, and the development of chikungunya vaccines.
Collapse
Affiliation(s)
- Mohamad S. Hakim
- Department of Microbiology, Faculty of Medicine, Public Health, and Nursing, Universitas Gadjah Mada, Yogyakarta 55281, Indonesia
| | | |
Collapse
|
7
|
Rachmat A, Kelly GC, Hontz RD, Supaprom C, Heang V, Hip P, Garcia-Rivera JA, Prom S, Chhea C, Sutherland IW, Corson KS, Letizia AG. Clinical and epidemiologic evaluation of a 2020 chikungunya outbreak in Cambodia. BMC Infect Dis 2022; 22:949. [PMID: 36526991 PMCID: PMC9758031 DOI: 10.1186/s12879-022-07936-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Accepted: 12/09/2022] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND In 2020, the Kingdom of Cambodia experienced a nationwide outbreak of chikungunya virus (CHIKV). Despite an increase in the frequency of outbreaks and expanding geographic range of CHIKV, diagnostic challenges remain, and limited surveillance data of sufficient granularity are available to characterize epidemiological profiles and disease dynamics of the virus. METHODS An ongoing and long-standing cross-sectional study of acute undifferentiated febrile illness (AUFI) in Cambodia was leveraged to describe the disease epidemiology and characterize the clinical presentation of patients diagnosed with CHIKV during the 2020 outbreak. Participants presenting with AUFI symptoms at ten study locations provided acute and convalescent blood samples and were tested for CHIKV using a reverse transcription-polymerase chain reaction (RT-PCR) and serological diagnostic methods including IgM and IgG. Acute and follow-up clinical data were also collected. RESULTS From 1194 participant blood samples tested, 331 (27.7%) positive CHIKV cases were detected. Most CHIKV positive individuals (280, 84.6%) reported having a fever 3 to 4 days prior to visiting a health facility. Symptoms including chills, joint pain, nausea, vomiting, and lesions were all statistically significant among CHIKV positive participants compared to CHIKV negative AUFI participants. Cough was negatively associated with CHIKV positive participants. Positivity proportions were significantly higher among adults compared to children. No significant difference was found in positivity proportion between rainy and dry seasons during the outbreak. Positive CHIKV cases were detected in all study site provinces, with the highest test positivity proportion recorded in the rural northeast province of Kratie. CONCLUSIONS Surveillance data captured in this study provided a clinical and epidemiological characterization of positive CHIKV patients presenting at selected health facilities in Cambodia in 2020, and highlighted the widespread distribution of the outbreak, impacting both urban and rural locations. Findings also illustrated the importance of utilizing both RT-PCR and serological testing for effective CHIKV surveillance.
Collapse
Affiliation(s)
- Agus Rachmat
- AC Investment Co, Contractor for NAMRU-2, Phnom Penh, Cambodia
| | | | | | | | - Vireak Heang
- U.S. Naval Medical Research Unit TWO, Phnom Penh, Cambodia
| | - Phireak Hip
- AC Investment Co, Contractor for NAMRU-2, Phnom Penh, Cambodia
| | | | - Satharath Prom
- Department of Health, Ministry of National Defense, Phnom Penh, Cambodia
| | - Chhorvann Chhea
- grid.436334.5National Institute of Public Health, Ministry of Health, Phnom Penh, Cambodia
| | | | - Karen S. Corson
- U.S. Naval Medical Research Unit TWO, Singapore, Singapore ,U.S. Naval Medical Research Unit TWO, Phnom Penh, Cambodia
| | | |
Collapse
|
8
|
Myint KSA, Mawuntu AHP, Haryanto S, Imran D, Dian S, Dewi YP, Ganiem AR, Anggreani R, Iskandar MM, Bernadus JBB, Maharani K, Susanto D, Estiasari R, Dewi H, Kristiani A, Gaghiwu L, Johar E, Yudhaputri FA, Antonjaya U, Ledermann JP, van Crevel R, Hamers RL, Powers AM. Neurological Disease Associated with Chikungunya in Indonesia. Am J Trop Med Hyg 2022; 107:291-295. [PMID: 35895435 PMCID: PMC9393428 DOI: 10.4269/ajtmh.22-0050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Accepted: 04/04/2022] [Indexed: 11/07/2022] Open
Abstract
Chikungunya virus (CHIKV) is recognized but rarely considered as a cause of central nervous system infection in endemic areas. A total of 244 patients with acute meningoencephalitis in Indonesia were retrospectively tested to identify whether any CHIKV infection was associated with neurological manifestations, especially in provinces known for CHIKV endemicity. Cerebrospinal fluid (CSF) and blood specimens were tested using CHIKV-specific real-time reverse transcription polymerase chain reaction and IgM ELISA, alongside a panel of neurotropic viruses. We report four cases of suspected or confirmed CHIKV-associated neurological disease, including CHIKV RNA detection in CSF of one patient and in acute serum of another, and CHIKV IgM in CSF of three patients and in serum of a fourth. In conclusion, CHIKV should be considered as a cause of neurologic disease in endemic areas and especially during outbreaks, in addition to the more common arboviral diseases such as dengue and Japanese encephalitis viruses.
Collapse
Affiliation(s)
| | - Arthur H. P. Mawuntu
- Faculty of Medicine, Universitas Sam Ratulangi, R.D. Kandou Hospital, Manado, Indonesia
| | - Sotianingsih Haryanto
- Raden Mattaher Hospital, Jambi, Indonesia
- Faculty of Medicine and Health Sciences, Universitas Jambi, Jambi, Indonesia
| | - Darma Imran
- Faculty of Medicine Universitas Indonesia, Cipto Mangunkusumo Hospital, Jakarta, Indonesia
| | - Sofiati Dian
- Faculty of Medicine, Universitas Padjadjaran, Bandung, Indonesia
| | - Yora P. Dewi
- Eijkman Institute for Molecular Biology, Jakarta, Indonesia
| | - Ahmad R. Ganiem
- Faculty of Medicine, Universitas Padjadjaran, Bandung, Indonesia
| | - Riane Anggreani
- Faculty of Medicine, Universitas Sam Ratulangi, R.D. Kandou Hospital, Manado, Indonesia
| | - Mirna M. Iskandar
- Raden Mattaher Hospital, Jambi, Indonesia
- Faculty of Medicine and Health Sciences, Universitas Jambi, Jambi, Indonesia
| | - Janno B. B. Bernadus
- Faculty of Medicine, Universitas Sam Ratulangi, R.D. Kandou Hospital, Manado, Indonesia
| | - Kartika Maharani
- Faculty of Medicine Universitas Indonesia, Cipto Mangunkusumo Hospital, Jakarta, Indonesia
| | - David Susanto
- Faculty of Medicine, Universitas Sam Ratulangi, R.D. Kandou Hospital, Manado, Indonesia
| | - Riwanti Estiasari
- Faculty of Medicine Universitas Indonesia, Cipto Mangunkusumo Hospital, Jakarta, Indonesia
| | - Hasna Dewi
- Faculty of Medicine and Health Sciences, Universitas Jambi, Jambi, Indonesia
| | | | - Lidia Gaghiwu
- Faculty of Medicine, Universitas Sam Ratulangi, R.D. Kandou Hospital, Manado, Indonesia
| | - Edison Johar
- Eijkman Institute for Molecular Biology, Jakarta, Indonesia
| | | | - Ungke Antonjaya
- Eijkman Institute for Molecular Biology, Jakarta, Indonesia
- Eijkman-Oxford Clinical Research Unit, Jakarta, Indonesia
| | | | - Reinout van Crevel
- Department of Internal Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Raph L. Hamers
- Eijkman-Oxford Clinical Research Unit, Jakarta, Indonesia
- Nuffield Department of Medicine, Centre for Tropical Medicine and Global Health, University of Oxford, Oxford, United Kingdom
| | - Ann M. Powers
- Centers for Disease Control and Prevention, Fort Collins, Colorado
| |
Collapse
|
9
|
Julander JG, Anderson N, Haese N, Andoh T, Streblow DN, Cortez P, Carter K, Marniquet X, Watson H, Mandron M. Therapeutic and prophylactic treatment with a virus-specific antibody is highly effective in rodent models of Chikungunya infection and disease. Antiviral Res 2022; 202:105295. [PMID: 35339583 DOI: 10.1016/j.antiviral.2022.105295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 03/07/2022] [Accepted: 03/21/2022] [Indexed: 11/16/2022]
Abstract
Chikungunya virus (CHIKV) has re-emerged as a significant human pathogen in the 21st century, causing periodic, and sometimes widespread, outbreaks over the past 15 years. Although mortality is very rare, a debilitating arthralgia is very common and may persist for months or years. There are no antivirals that are approved for the treatment of CHIKV infection, and current treatment options consist of supportive care only. Herein, we demonstrate the efficacy of a CHIKV-specific antibody in the prophylactic and therapeutic treatment of CHIKV in mouse models of disease. The fully human anti-CHIKV monoclonal Ab SVIR023 demonstrated broad in vitro activity against representative strains from the three major CHIKV clades. Therapeutic treatment with SVIR023 administered 1- or 3-days post-infection resulted in reduced virus in various tissues in a dose- and time-dependent manner. Prophylactic treatment up to 4 weeks prior to virus challenge was also effective in preventing disease in mice. Mice treated with SVIR023 and infected with CHIKV were resistant to secondary challenge and no evidence of antibody enhancement of disease was observed. Treatment with SVIR023 was effective in mouse models of CHIKV infection and disease and further evaluation towards clinical development is warranted.
Collapse
Affiliation(s)
- Justin G Julander
- Institute for Antiviral Research, Utah State University, Logan, UT, USA.
| | - Nicole Anderson
- Institute for Antiviral Research, Utah State University, Logan, UT, USA
| | - Nicole Haese
- Vaccine and Gene Therapy Institute, Oregon Health and Science University, Beaverton, OR, USA
| | - Takeshi Andoh
- Vaccine and Gene Therapy Institute, Oregon Health and Science University, Beaverton, OR, USA
| | - Daniel N Streblow
- Vaccine and Gene Therapy Institute, Oregon Health and Science University, Beaverton, OR, USA
| | | | | | | | - Hugh Watson
- Evotec ID (Lyon), Lyon, France; Department of Clinical Pharmacology, Aarhus University, Aarhus, Denmark
| | | |
Collapse
|
10
|
Stubbs SCB, Johar E, Yudhaputri FA, Yohan B, Santoso MS, Hayati RF, Denis D, Blacklaws BA, Powers AM, Sasmono RT, Myint KSA, Frost SDW. An investig-ation into the epidemiology of chikungunya virus across neglected regions of Indonesia. PLoS Negl Trop Dis 2020; 14:e0008934. [PMID: 33347450 PMCID: PMC7785224 DOI: 10.1371/journal.pntd.0008934] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 01/05/2021] [Accepted: 10/30/2020] [Indexed: 12/17/2022] Open
Abstract
Background Chikungunya virus (CHIKV) is an important emerging and re-emerging public health problem worldwide. In Indonesia, where the virus is endemic, epidemiological information from outside of the main islands of Java and Bali is limited. Methodology/Principal Findings Four hundred and seventy nine acutely febrile patients presenting between September 2017–2019 were recruited from three city hospitals situated in Ambon, Maluku; Banjarmasin, Kalimantan; and Batam, Batam Island as part of a multi-site observational study. CHIKV RNA was detected in a single serum sample while a separate sample was IgM positive. IgG seroprevalence was also low across all three sites, ranging from 1.4–3.2%. The single RT-PCR positive sample from this study and 24 archived samples collected during other recent outbreaks throughout Indonesia were subjected to complete coding region sequencing to assess the genetic diversity of Indonesian strains. Phylogenetic analysis revealed all to be of a single clade, which was distinct from CHIKV strains recently reported from neighbouring regions including the Philippines and the Pacific Islands. Conclusions/Significance Chikungunya virus strains from recent outbreaks across Indonesia all belong to a single clade. However, low-level seroprevalence and molecular detection of CHIKV across the three study sites appears to contrast with the generally high seroprevalences that have been reported for non-outbreak settings in Java and Bali, and may account for the relative lack of CHIKV epidemiological data from other regions of Indonesia. Outbreaks of chikungunya virus (CHIKV) are a common occurrence in Indonesia. However, limited data is available on CHIKV from regions outside of the main, central islands of Java and Bali. We recruited hospital patients from three cities located in the east (Ambon), west (Batam) and north (Banjarmasin) of the country, and screened their blood for evidence of CHIKV infection. Our results showed that CHIKV infections were relatively uncommon across patients from all three sites, suggesting that CHIKV transmission is currently relatively rare in these regions. Additional analysis of 25 recent Indonesian CHIKV genome sequences revealed that a new lineage of CHIKV has recently emerged in Indonesia. Several reports have highlighted Indonesia as a major source of imported CHIKV cases, suggesting that this new lineage has the potential to be introduced into neighbouring countries in the near future, with unknown consequences. Overall, our results indicate that additional CHIKV surveillance studies in Indonesia and Southeast Asia are needed in order to gain a clearer understanding of transmission routes and hot spots throughout the region.
Collapse
Affiliation(s)
- Samuel C. B. Stubbs
- University of Cambridge, Department of Veterinary Medicine, Cambridge, United Kingdom
- * E-mail: (SCBS); (KSAM)
| | - Edison Johar
- Eijkman Institute for Molecular Biology, Jakarta, Indonesia
| | | | | | | | | | | | - Barbara A. Blacklaws
- University of Cambridge, Department of Veterinary Medicine, Cambridge, United Kingdom
| | - Ann M. Powers
- Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, Colorado, United States of America
| | | | - Khin Saw Aye Myint
- Eijkman Institute for Molecular Biology, Jakarta, Indonesia
- * E-mail: (SCBS); (KSAM)
| | - Simon D. W. Frost
- University of Cambridge, Department of Veterinary Medicine, Cambridge, United Kingdom
- Microsoft Research, Redmond, Washington, United States of America
| |
Collapse
|