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Kardena IM, Adi AAAM, Astawa INM, Oka IBM, Sahibzada S, Bruce M, O’Dea M. Seroconversion, genotyping, and potential mosquito vector identification of Japanese encephalitis virus in pig sentinel settings in Bali, Indonesia. Vet World 2024; 17:89-98. [PMID: 38406355 PMCID: PMC10884589 DOI: 10.14202/vetworld.2024.89-98] [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: 09/05/2023] [Accepted: 12/05/2023] [Indexed: 02/27/2024] Open
Abstract
Background and Aims Despite the endemicity of Japanese encephalitis virus (JEV) in humans and animals in the Province of Bali, Indonesia, there is little data on whether seroconversion to the virus occurs in pigs, JEV genotypes circulating, and it's potential mosquito vectors in the area. The aims of this study were to (i) Determine whether JEV infection in Balinese pigs occurs before reaching their sexual maturity, (ii) identify the genotypes of circulating JEV, and (iii) identify potential JEV mosquito vectors at the study sites in urban and peri-urban areas of Bali. Materials and Methods Sixteen 1-week-old Landrace piglets from two different sows were housed in Denpasar. Similarly, 18 one-week-old mixed-breed piglets of two different sows were housed in Badung Regency. The piglets were bled every 1 to 4 weeks for up to 24 weeks. Serum samples from the 11 piglets were tested for antibodies against JEV, and seroconversion-suspected sera were titrated using an enzyme-linked immunosorbent assay. Blood of seroconverted sera from pigs were tested using polymerase chain reaction (PCR) to detect the genetic sequence of JEV. The mosquitoes in the sentinels were trapped throughout the study period to identify the potential mosquito vectors of JEV. Results Antibodies were detected in most of the selected piglets' sera from weeks 1 to 24 of their age. However, sera of pig B9 collected from the sentinel setting in Badung Regency showed a four-fold increase in antibody titer from week 4 to week 8, indicating seroconversion. PCR testing of blood from B9 (pooled blood sample collected from week 5 to week 8) identified JEV nucleic acids, which were phylogenetically classified as belonging to the JEV genotype III. Meanwhile, 1271 of two genera of mosquitoes, Anopheles spp. and Culex spp. were trapped in the pig sentinels. Conclusion JEV seroconversion likely occurs before the pig reaches sexual maturity in Badung Regency. Sequence data indicate that JEV genotype III is circulating in the pig sentinel setting in the regency; however, circulating genotypes need to be clarified through increased surveillance. Meanwhile, Culex spp. and most likely Culex quinquefasciatus and Anopheles spp. were the dominant mosquitoes present in the study sites set in the urban area of Denpasar and peri-urban areas of Badung, Bali, indicating that these are likely vectors in spread of JEV in the region.
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Affiliation(s)
- I Made Kardena
- Department of Pathobiology, Faculty of Veterinary Medicine, Udayana University, Jalan PB Sudirman, Denpasar, Bali, 80234, Indonesia
- School of Veterinary Medicine and Centre for Biosecurity and One Health, Harry Butler Institute, Murdoch University, Perth, Western Australia, 6150, Australia
| | - Anak Agung Ayu Mirah Adi
- Department of Pathobiology, Faculty of Veterinary Medicine, Udayana University, Jalan PB Sudirman, Denpasar, Bali, 80234, Indonesia
| | - I Nyoman Mantik Astawa
- Department of Pathobiology, Faculty of Veterinary Medicine, Udayana University, Jalan PB Sudirman, Denpasar, Bali, 80234, Indonesia
| | - Ida Bagus Made Oka
- Department of Pathobiology, Faculty of Veterinary Medicine, Udayana University, Jalan PB Sudirman, Denpasar, Bali, 80234, Indonesia
| | - Shafi Sahibzada
- School of Veterinary Medicine and Centre for Biosecurity and One Health, Harry Butler Institute, Murdoch University, Perth, Western Australia, 6150, Australia
- Australian Centre for Disease Preparedness, Commonwealth Scientific and Industrial Research Organization, Geelong, VIC 3220, Australia
| | - Mieghan Bruce
- School of Veterinary Medicine and Centre for Biosecurity and One Health, Harry Butler Institute, Murdoch University, Perth, Western Australia, 6150, Australia
| | - Mark O’Dea
- School of Veterinary Medicine and Centre for Biosecurity and One Health, Harry Butler Institute, Murdoch University, Perth, Western Australia, 6150, Australia
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Putri WCWS, Sawitri AAS, Yuliyatni PCD, Ariawan IMD, Meyta H, Labiba SU, Suwarba IGNM, Sutarsa IN. Cost-effectiveness analysis of Japanese Encephalitis (JE) vaccination program in Bali Province, Indonesia. Vaccine 2023; 41:6930-6940. [PMID: 37866992 DOI: 10.1016/j.vaccine.2023.10.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Revised: 10/02/2023] [Accepted: 10/03/2023] [Indexed: 10/24/2023]
Abstract
OBJECTIVE The incidence of Japanese Encephalitis (JE) in Bali Province remains high, and is one among the highest in Indonesia. The Indonesian Government initiated the JE vaccination campaign followed by a JE vaccine introduction program in Bali Province in 2018. The JE vaccination program then has been fully integrated into the provincial routine immunization program since 2019. We conducted a retrospective economic analysis of JE vaccination program in Bali Province, Indonesia; considering multiple vaccination strategies. METHODS We conducted a cost-effectiveness analysis using a decision analytic model comparing two vaccination strategies with no vaccination from the societal and government perspectives. These vaccination strategies were: (1) JE vaccination campaign and introduction program, and (2) a routine JE vaccination program. We compared costs and outcomes for three hypothetical cohorts of 100,000 children followed from birth to the age of 10 years, with impacts measured throughout the child's life-time. We measured the economic consequences as costs per case, per death, and per disability-adjusted life year (DALY) averted. RESULTS A routine JE immunization program was the most cost-effective strategy with a cost per DALYs averted of US$ 212.59 and US$ 94.09 from the government and societal perspectives respectively. In contrast, costs per DALYs averted through the JE vaccination campaign and introduction strategy was US$ 1,473.53 and US$ 1,224.20 from the government and societal perspectives respectively. CONCLUSIONS Both JE vaccination strategies are cost-effective but they are not cost-saving when compared to no immunization program.
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Affiliation(s)
- Wayan Citra Wulan Sucipta Putri
- Department of Public Health and Preventive Medicine, Faculty of Medicine, Udayana University, Jl. PB Sudirman, Denpasar, Bali 80232, Indonesia.
| | - Anak Agung Sagung Sawitri
- Department of Public Health and Preventive Medicine, Faculty of Medicine, Udayana University, Jl. PB Sudirman, Denpasar, Bali 80232, Indonesia
| | - Putu Cintya Denny Yuliyatni
- Department of Public Health and Preventive Medicine, Faculty of Medicine, Udayana University, Jl. PB Sudirman, Denpasar, Bali 80232, Indonesia
| | - I Made Dwi Ariawan
- Department of Public Health and Preventive Medicine, Faculty of Medicine, Udayana University, Jl. PB Sudirman, Denpasar, Bali 80232, Indonesia
| | - Hashta Meyta
- Directorate General Prevention and Control of Disease, Ministry of Health, Jakarta, Indonesia
| | - Sofya Umi Labiba
- Directorate General Prevention and Control of Disease, Ministry of Health, Jakarta, Indonesia
| | - I Gusti Ngurah Made Suwarba
- Department of Child Health, Faculty of Medicine, Udayana University, Jl. PB Sudirman, Denpasar, Bali 80232, Indonesia
| | - I Nyoman Sutarsa
- Department of Public Health and Preventive Medicine, Faculty of Medicine, Udayana University, Jl. PB Sudirman, Denpasar, Bali 80232, Indonesia; School of Medicine and Psychology, College of Health and Medicine, The Australian National University, ACT 2001, Australia
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Alisjahbana DH, Nurmawati S, Milanti M, Djauhari H, Ledermann JP, Antonjaya U, Dewi YP, Johar E, Wiyatno A, Sriyani IY, Alisjahbana B, Safari D, Myint KSA, Powers AM, Hakim DDL. Central nervous system infection in a pediatric population in West Java. PLoS Negl Trop Dis 2023; 17:e0011769. [PMID: 38011279 PMCID: PMC10703213 DOI: 10.1371/journal.pntd.0011769] [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: 10/16/2022] [Revised: 12/07/2023] [Accepted: 11/03/2023] [Indexed: 11/29/2023] Open
Abstract
Central nervous system (CNS) viral infections are critical causes of morbidity and mortality in children; however, comprehensive data on etiology is lacking in developing countries such as Indonesia. To study the etiology of CNS infections in a pediatric population, 50 children admitted to two hospitals in Bandung, West Java, during 2017-2018 were enrolled in a CNS infection study. Cerebrospinal fluid and serum specimens were tested using molecular, serological, and virus isolation platforms for a number of viral and bacteriological agents. Causal pathogens were identified in 10 out of 50 (20%) and included cytomegalovirus (n = 4), Streptococcus pneumoniae (n = 2), tuberculosis (n = 2), Salmonella serotype Typhi (n = 1) and dengue virus (n = 1). Our study highlights the importance of using a wide range of molecular and serological detection methods to identify CNS pathogens, as well as the challenges of establishing the etiology of CNS infections in pediatric populations of countries with limited laboratory capacity.
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Affiliation(s)
- Dewi H. Alisjahbana
- Department of Child Health, Hasan Sadikin Hospital, Faculty of Medicine, Universitas Padjadjaran, Bandung, Indonesia
| | - Syndi Nurmawati
- Research Center for Care and Control of Infectious Disease, Universitas Padjadjaran, Bandung, Indonesia
| | - Mia Milanti
- Department of Child Health, Hasan Sadikin Hospital, Faculty of Medicine, Universitas Padjadjaran, Bandung, Indonesia
| | - Hofiya Djauhari
- Research Center for Care and Control of Infectious Disease, Universitas Padjadjaran, Bandung, Indonesia
| | - Jeremy P. Ledermann
- Centers for Disease Control and Prevention, Fort Collins, Colorado, United States of America
| | - Ungke Antonjaya
- Oxford University Clinical Research Unit Indonesia, Faculty of Medicine Universitas Indonesia, Jakarta, Indonesia
- Emerging Virus Research Unit, Eijkman Institute for Molecular Biology, Jakarta, Indonesia
| | - Yora Permata Dewi
- Emerging Virus Research Unit, Eijkman Institute for Molecular Biology, Jakarta, Indonesia
| | - Edison Johar
- Emerging Virus Research Unit, Eijkman Institute for Molecular Biology, Jakarta, Indonesia
| | - Ageng Wiyatno
- Emerging Virus Research Unit, Eijkman Institute for Molecular Biology, Jakarta, Indonesia
| | - Ida Yus Sriyani
- Emerging Virus Research Unit, Eijkman Institute for Molecular Biology, Jakarta, Indonesia
| | - Bachti Alisjahbana
- Research Center for Care and Control of Infectious Disease, Universitas Padjadjaran, Bandung, Indonesia
- Department of Internal Medicine, Hasan Sadikin Hospital, Faculty of Medicine, Universitas Padjadjaran, Bandung, Indonesia
| | - Dodi Safari
- Eijkman Research Center for Molecular Biology, National Research and Innovation Agency, Jakarta, Indonesia
| | - Khin Saw Aye Myint
- Emerging Virus Research Unit, Eijkman Institute for Molecular Biology, Jakarta, Indonesia
| | - Ann M. Powers
- Centers for Disease Control and Prevention, Fort Collins, Colorado, United States of America
| | - Dzulfikar DL Hakim
- Department of Child Health, Hasan Sadikin Hospital, Faculty of Medicine, Universitas Padjadjaran, Bandung, Indonesia
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Xu J, Wahaab A, Khan S, Nawaz M, Anwar MN, Liu K, Wei J, Hameed M, Ma Z. Recent Population Dynamics of Japanese Encephalitis Virus. Viruses 2023; 15:1312. [PMID: 37376612 DOI: 10.3390/v15061312] [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: 05/01/2023] [Revised: 05/31/2023] [Accepted: 05/31/2023] [Indexed: 06/29/2023] Open
Abstract
Japanese encephalitis virus (JEV) causes acute viral encephalitis in humans and reproductive disorders in pigs. JEV emerged during the 1870s in Japan, and since that time, JEV has been transmitted exclusively throughout Asia, according to known reporting and sequencing records. A recent JEV outbreak occurred in Australia, affecting commercial piggeries across different temperate southern Australian states, and causing confirmed infections in humans. A total of 47 human cases and 7 deaths were reported. The recent evolving situation of JEV needs to be reported due to its continuous circulation in endemic regions and spread to non-endemics areas. Here, we reconstructed the phylogeny and population dynamics of JEV using recent JEV isolates for the future perception of disease spread. Phylogenetic analysis shows the most recent common ancestor occurred about 2993 years ago (YA) (95% Highest posterior density (HPD), 2433 to 3569). Our results of the Bayesian skyline plot (BSP) demonstrates that JEV demography lacks fluctuations for the last two decades, but it shows that JEV genetic diversity has increased during the last ten years. This indicates the potential JEV replication in the reservoir host, which is helping it to maintain its genetic diversity and to continue its dispersal into non-endemic areas. The continuous spread in Asia and recent detection from Australia further support these findings. Therefore, an enhanced surveillance system is needed along with precautionary measures such as regular vaccination and mosquito control to avoid future JEV outbreaks.
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Affiliation(s)
- Jinpeng Xu
- School of Life Sciences and Food Engineering, Hebei University of Engineering, Handan 056038, China
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Science, Shanghai 200241, China
| | - Abdul Wahaab
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Science, Shanghai 200241, China
| | - Sawar Khan
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Science, Shanghai 200241, China
- Institute of Molecular Biology and Biotechnology, The University of Lahore, Lahore 54000, Pakistan
| | - Mohsin Nawaz
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Science, Shanghai 200241, China
- Faculty of Veterinary and Animal sciences, University of Poonch, Rawalakot 12350, Pakistan
| | | | - Ke Liu
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Science, Shanghai 200241, China
| | - Jianchao Wei
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Science, Shanghai 200241, China
| | - Muddassar Hameed
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Science, Shanghai 200241, China
- Center for Zoonotic and Arthropod-borne Pathogens, Virginia Polytechnic Institute and State University, Blacksburg, VA 24060, USA
| | - Zhiyong Ma
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Science, Shanghai 200241, China
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Bhumiratana A, Nunthawarasilp P, Intarapuk A, Pimnon S, Ritthison W. Emergence of zoonotic Brugia pahangi parasite in Thailand. Vet World 2023; 16:752-765. [PMID: 37235155 PMCID: PMC10206978 DOI: 10.14202/vetworld.2023.752-765] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 03/09/2023] [Indexed: 05/28/2023] Open
Abstract
Zoonotic Brugia pahangi parasite infections in humans have emerged over two decades in Southeast Asia (SEA), including Malaysia and Thailand. The species is commonly found in domestic cats and dogs as the natural reservoir hosts. The sporadic transmission pattern of B. pahangi zoonosis causes childhood infections in Thailand and adulthood infections in Malaysia. It is crucial to understand the vulnerability in how zoonotic B. pahangi parasite is transmitted to susceptible persons in receptive settings and the exposure to the infection under impoverished environment to which the human-vector-animal interactions are related. This acquisition of knowledge will help multiple health science professions to apply One Health approach to strengthening the capacity in diagnosis and surveillance, and hence detecting and monitoring the "lingering" zoonotic B. pahangi infections present in vulnerable populations in Thailand and elsewhere in SEA. In this review article, the authors focused on articulating the concepts of plantation-related zoonotic B. pahangi filariasis by updating current knowledge of B. pahangi life cycle, vector's life cycle and current state of research on the epidemiology and ecology of B. pahangi zoonosis.
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Affiliation(s)
- Adisak Bhumiratana
- Thammasat University Research Unit in One Health and EcoHealth, Pathum Thani, Thailand
- Faculty of Public Health, Thammasat University, Pathum Thani 12121, Thailand
| | | | - Apiradee Intarapuk
- Faculty of Veterinary Medicine, Mahanakorn University of Technology, Bangkok 10530, Thailand
| | - Suntorn Pimnon
- Faculty of Public Health, Bangkokthonburi University, Bangkok 10170, Thailand
| | - Wanapa Ritthison
- Office of Disease Prevention and Control, Region 6 Chonburi, Thailand
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Individual and Herd-Level Seroprevalence in Association with Potential Risk Factors of Japanese Encephalitis in Pigs Collected from Urban, Periurban, and Rural Areas of Bali, Indonesia. Vet Med Int 2023; 2023:9682657. [PMID: 36844471 PMCID: PMC9946736 DOI: 10.1155/2023/9682657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 01/30/2023] [Accepted: 01/31/2023] [Indexed: 02/17/2023] Open
Abstract
A study to assess the seroprevalence antibodies against JEV in pigs in Denpasar, Badung, and Karangasem as the representatives of urban, periurban, and rural areas in the province of Bali was conducted. Sampled pigs' blood was collected and their sera were tested for antibody detection using commercial IgG ELISA. A standard questionnaire was used to interview the pig owners or farmers to identify the determinants associated with the seropositivity of the antibodies. Overall, 96.6% (95% CI: 94.5-98.1) of 443 pig sera in individual animal-level seroprevalence were seropositive to the ELISA. Karangasem had the highest test prevalence at 97.3% (95% CI: 93.1-99.2) while Badung had a slightly lower prevalence at 96.6% (95% CI: 92.2-98.9), and Denpasar had the lowest prevalence at 96% (95% CI: 91.5-98.5) (p=0.84). In herd-level seroprevalence, all sampled herds contained one or more seropositive pigs (overall herd-level seroprevalence 100% [95% CI: 97.7-100]). No animal-level factors were significantly associated with seropositivity (all p values >0.05). For the herd-level risk factors relating to pig management and husbandry practices adopted, no analysis model could be generated, as all the sampled herds were seropositive. More than 90% seroprevalence detected in this study indicates high natural JEV infection occurred in pigs, which highlights the high public health risk of the infection in the areas.
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Riswari SF, Velies DS, Lukman N, Jaya UA, Djauhari H, Ma’roef CN, Myint KSA, Widjaja S, van der Ven A, Alisjahbana B, de Mast Q, Kosasih H. Dengue incidence and length of viremia by RT-PCR in a prospective observational community contact cluster study from 2005-2009 in Indonesia. PLoS Negl Trop Dis 2023; 17:e0011104. [PMID: 36745606 PMCID: PMC9901748 DOI: 10.1371/journal.pntd.0011104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Accepted: 01/16/2023] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Dengue has become a major global health threat since being recognized three centuries ago. Important gaps remain in understanding the transmission dynamics of dengue virus (DENV) infection. This study reports the results of a prospective observational cluster study that investigated the incidence of symptomatic and asymptomatic infections and length of viremia among close community contacts of hospitalized DENV-infected patients. METHODOLOGY/PRINCIPAL FINDINGS Between 2005 and 2009, dengue-confirmed cases (n = 97) admitted to Hasan Sadikin Hospital in Bandung, Indonesia, were enrolled as index cases. Subsequently, twenty close community contacts (n = 1928) living with and around the index cases were included and followed up for up to 14 days. Body temperature was measured daily; blood samples were collected every 3-4 days and when reported fever. DENV infection was confirmed using Reverse Transcriptase-Polymerase Chain Reaction (RT-PCR), IgM rapid test, and Enzyme-linked Immunosorbent Assay (ELISA). Among the 1928 community contacts, a total of 72 (3.7%) acute DENV infections were diagnosed, which equates to an incidence of 636 cases per 1,000 person-years (95% Confidence interval (CI) 588 to 687 cases per 1,000 person-years). Twenty-nine cases (40%) were symptomatic (22 dengue fever (DF) & 7 dengue hemorrhagic fever (DHF)), and 43 (60%) were asymptomatic. Primary and secondary DENV infections were detected in 18 (25%) and 54 (75%) subjects. Among the RT-PCR positives, viremia was observed as early as seven days before fever onset and converted to negative as late as seven days after the onset of fever. CONCLUSIONS DENV infections are common among close community contacts of hospitalized dengue patients. The high number of asymptomatic infections and the observation that viremia precedes the onset of fever for up to seven days highlight the importance of unrecognized dengue transmission and the need for improved transmission control.
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Affiliation(s)
- Silvita Fitri Riswari
- Health Research Unit, Faculty of Medicine, Faculty of Medicine, Universitas Padjadjaran, Bandung, Indonesia
- Department of Internal Medicine and the Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, The Netherlands
- * E-mail:
| | - Dyana Safitri Velies
- Health Research Unit, Faculty of Medicine, Faculty of Medicine, Universitas Padjadjaran, Bandung, Indonesia
| | - Nurhayati Lukman
- Viral Diseases Program, U.S. Naval Medical Research Unit No.2, Jakarta, Indonesia
| | - Ungke Anton Jaya
- Viral Diseases Program, U.S. Naval Medical Research Unit No.2, Jakarta, Indonesia
| | - Hofiya Djauhari
- Health Research Unit, Faculty of Medicine, Faculty of Medicine, Universitas Padjadjaran, Bandung, Indonesia
| | - Chairin Nisa Ma’roef
- Viral Diseases Program, U.S. Naval Medical Research Unit No.2, Jakarta, Indonesia
| | | | - Susana Widjaja
- Viral Diseases Program, U.S. Naval Medical Research Unit No.2, Jakarta, Indonesia
| | - Andre van der Ven
- Department of Internal Medicine and the Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Bachti Alisjahbana
- Health Research Unit, Faculty of Medicine, Faculty of Medicine, Universitas Padjadjaran, Bandung, Indonesia
- Department of Internal Medicine, Hasan Sadikin General Hospital, Bandung, Indonesia
| | - Quirijn de Mast
- Department of Internal Medicine and the Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Herman Kosasih
- Viral Diseases Program, U.S. Naval Medical Research Unit No.2, Jakarta, Indonesia
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Potential Mammalian Vector-Borne Diseases in Live and Wet Markets in Indonesia and Myanmar. MICROBIOLOGY RESEARCH 2023. [DOI: 10.3390/microbiolres14010011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Vector-borne diseases spread from wild animals and their associated ectoparasites to humans and domesticated animals. Wildlife markets are recognized as important areas where this transfer can take place. We assessed the potential for spreading vector-borne diseases in two live and wet markets in Myanmar (Mong La, on the Myanmar-China border) and Indonesia (Sukahaji in Bandung on the island of Java) by making an inventory of all live and freshly killed wild mammals for sale. For eight mammal families, we quantified the number of animals on offer, and we used a heatmap cluster analysis to map vector-borne diseases that these families may carry. In Myanmar, we observed large numbers of wild pigs and deer (potentially carrying West Nile and various encephalitis viruses) whereas in Indonesia we observed Old World fruit bats (potentially carrying Chikungunya and encephalitis viruses) and squirrels (potentially carrying West Nile and encephalitis viruses). The trade in Indonesia was dominated by live mammals offered for sale as pets, and only Old World fruit bats and squirrels traded for traditional Asian medicine were killed in the markets. The trade in Myanmar was more geared towards wild meat (e.g., wild pigs, deer, primates) and traditional Asian medicine (squirrels). The combined risks of vector-borne diseases spreading from traded animals to human health highlight the need for an integrated approach protecting public health, economic interests and biodiversity.
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Molecular Mechanism and Role of Japanese Encephalitis Virus Infection in Central Nervous System-Mediated Diseases. Viruses 2022; 14:v14122686. [PMID: 36560690 PMCID: PMC9781168 DOI: 10.3390/v14122686] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 11/21/2022] [Accepted: 11/25/2022] [Indexed: 12/05/2022] Open
Abstract
The Japanese encephalitis virus (JEV) is the most common cause of neurodegenerative disease in Southeast Asia and the Western Pacific region; approximately 1.15 billion people are at risk, and thousands suffer from permanent neurological disorders across Asian countries, with 10-15 thousand people dying each year. JEV crosses the blood-brain barrier (BBB) and forms a complex with receptors on the surface of neurons. GRP78, Src, TLR7, caveolin-1, and dopamine receptor D2 are involved in JEV binding and entry into the neurons, and these receptors also play a role in carcinogenic activity in cells. JEV binds to GRP78, a member of the HSP70 overexpressed on malignant cells to enter neurons, indicating a higher chance of JEV infection in cancer patients. However, JEV enters human brain microvascular endothelial cells via an endocytic pathway mediated by caveolae and the ezrin protein and also targets dopamine-rich areas for infection of the midbrain via altering dopamine levels. In addition, JEV complexed with CLEC5A receptor of macrophage cells is involved in the breakdown of the BBB and central nervous system (CNS) inflammation. CLEC5A-mediated infection is also responsible for the influx of cytokines into the CNS. In this review, we discuss the neuronal and macrophage surface receptors involved in neuronal death.
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Aure WE, Sayama Y, Saito-Obata M, Salazar NP, Malbas FF, Galang HO, Imamura T, Zuasula CL, Oshitani H. Japanese encephalitis virus genotype III from mosquitoes in Tarlac, Philippines. IJID REGIONS 2022; 4:59-65. [PMID: 36093364 PMCID: PMC9453045 DOI: 10.1016/j.ijregi.2022.05.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 05/12/2022] [Accepted: 05/12/2022] [Indexed: 11/27/2022]
Abstract
Japanese encephalitis is endemic in the Philippines. Japanese encephalitis virus genotype III was detected in Culex tritaeniorhynchus. Mosquitoes breed in inundated rice fields close to human habitation. Epidemiological surveillance and immunization of children are identified needs.
Objectives The aim of this study was to investigate the presence of Japanese encephalitis virus (JEV) in a rice-farming community in the Philippines and to determine its implications regarding the epidemiology of viral encephalitides in the Asia-Pacific Region. Methods Mosquitoes were collected monthly from animal-baited traps close to flooded rice fields in two barangays (villages) in the Municipality of San Jose, Tarlac Province in Luzon, from May 2009 to July 2010. Virus was detected by nested reverse transcription PCR. Phylogenetic analysis of the amplified virus envelope gene was done using the maximum-likelihood method. Results A total of 28 700 known vector mosquitoes were collected, namely Culex vishnui, Culex fuscocephala, Culex tritaeniorhynchus, and Culex gelidus. JEV genotype III was detected in C. tritaeniorhynchus, belonging to the same genotype but form a different clade from those reported in the 1980s and in 2020 in this country. Conclusions Japanese encephalitis is associated with rice cultivation and the presence of infected mosquitoes in Tarlac, Philippines. It remains to be seen whether the observed genetic shift of genotype III to genotype I in Asia will in time have an impact on the epidemiology of Japanese encephalitis in the Philippines. For long-term disease control, regular surveillance and Japanese encephalitis immunization in children and travelers in high risk areas are recommended.
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Kosen S, Khoe LC, Indriasih E, Tarigan I, Iriawan RW, Agustiya RI, Letson GW, Vodicka E. Expanding japanese encephalitis vaccination to selected endemic indonesia provinces: A cost-effectiveness analysis. Vaccine X 2022; 11:100179. [PMID: 35782720 PMCID: PMC9243152 DOI: 10.1016/j.jvacx.2022.100179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 05/29/2022] [Accepted: 05/31/2022] [Indexed: 12/02/2022] Open
Abstract
Introduction A Markov model was used to evaluate the potential health and economic impact of introducing JE vaccine nationally and in selected endemic areas of Indonesia compared to no vaccination from government and societal perspectives over a child’s lifetime horizon. Methods Costs were obtained from hospitalized JE suspected patient billing data from 2014 to 2019 in seven provinces. Local data burden data were derived from the literature. Analysis considered several scenarios, including national and sub-regional introduction in seven provinces via a one-time vaccination campaign in all children 1–15 years old followed by routine immunization among infants (RI), or RI alone without vaccination campaign. Results and discussions Across scenarios, JE vaccination was projected to range from cost-saving to cost-effective compared to no vaccination at a willingness-to-pay threshold of 0.5x gross domestic product per capita. Including a one-time campaign would avert nearly three times as many JE cases and deaths compared to RI alone while still providing good value for money.
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Syahrani L, Permana DH, Syafruddin D, Zubaidah S, Asih PBS, Rozi IE, Hidayati APN, Kosasih S, Dewayanti FK, Rachmawati N, Risandi R, Bangs MJ, Bøgh C, Davidson J, Hendershot A, Burton T, Grieco JP, Achee NL, Lobo NF. An inventory of human night-biting mosquitoes and their bionomics in Sumba, Indonesia. PLoS Negl Trop Dis 2022; 16:e0010316. [PMID: 35312689 PMCID: PMC8970493 DOI: 10.1371/journal.pntd.0010316] [Citation(s) in RCA: 1] [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: 09/13/2021] [Revised: 03/31/2022] [Accepted: 03/09/2022] [Indexed: 11/18/2022] Open
Abstract
Mosquitoes are important vectors that transmit pathogens to human and other vertebrates. Each mosquito species has specific ecological requirements and bionomic traits that impact human exposure to mosquito bites, and hence disease transmission and vector control. A study of human biting mosquitoes and their bionomic characteristics was conducted in West Sumba and Southwest Sumba Districts, Nusa Tenggara Timur Province, Indonesia from May 2015 to April 2018. Biweekly human landing catches (HLC) of night biting mosquitoes both indoors and outdoors caught a total of 73,507 mosquito specimens (59.7% non-Anopheles, 40.3% Anopheles). A minimum of 22 Culicinae species belonging to four genera (Aedes, Armigeres, Culex, Mansonia), and 13 Anophelinae species were identified. Culex quinquefasciatus was the dominant Culicinae species, Anopheles aconitus was the principal Anopheles species inland, while An. sundaicus was dominant closer to the coast. The overall human biting rate (HBR) was 10.548 bites per person per night (bpn) indoors and 10.551 bpn outdoors. Mosquitoes biting rates were slightly higher indoors for all genera with the exception of Anopheles, where biting rates were slightly higher outdoors. Diurnal and crepuscular Aedes and Armigeres demonstrated declining biting rates throughout the night while Culex and Anopheles biting rates peaked before midnight and then declined. Both anopheline and non-anopheline populations did not have a significant association with temperature (p = 0.3 and 0.88 respectively), or rainfall (p = 0.13 and 0.57 respectively). The point distribution of HBR and seasonal variables did not have a linear correlation. Data demonstrated similar mosquito–human interactions occurring outdoors and indoors and during early parts of the night implying both indoor and outdoor disease transmission potential in the area–pointing to the need for interventions in both spaces. Integrated vector analysis frameworks may enable better surveillance, monitoring and evaluation strategies for multiple diseases.
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Affiliation(s)
- Lepa Syahrani
- 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
- * E-mail:
| | - Siti Zubaidah
- Eijkman Institute for Molecular Biology, Jakarta, Indonesia
| | | | - Ismail E. Rozi
- Eijkman Institute for Molecular Biology, Jakarta, Indonesia
| | | | - Sully Kosasih
- Eijkman Institute for Molecular Biology, Jakarta, Indonesia
| | | | - Nia Rachmawati
- Eijkman Institute for Molecular Biology, Jakarta, Indonesia
| | - Rifqi Risandi
- Eijkman Institute for Molecular Biology, Jakarta, Indonesia
| | - Michael J. Bangs
- Public Health and Malaria Control, PT Freeport Indonesia, International SOS, Kuala Kencana, Papua, Indonesia
- Department of Entomology, Faculty of Agriculture, Kasetsart University, Bangkok, Thailand
| | - Claus Bøgh
- The Sumba Foundation, Public Health and Malaria Control, Bali, Indonesia
| | - Jenna Davidson
- Department of Biological Sciences, Eck Institute for Global Health, University of Notre Dame, Indiana, United States of America
| | - Allison Hendershot
- Department of Biological Sciences, Eck Institute for Global Health, University of Notre Dame, Indiana, United States of America
| | - Timothy Burton
- Department of Biological Sciences, Eck Institute for Global Health, University of Notre Dame, Indiana, United States of America
| | - John P. Grieco
- Department of Biological Sciences, Eck Institute for Global Health, University of Notre Dame, Indiana, United States of America
| | - Nicole L. Achee
- Department of Biological Sciences, Eck Institute for Global Health, University of Notre Dame, Indiana, United States of America
| | - Neil F. Lobo
- Department of Biological Sciences, Eck Institute for Global Health, University of Notre Dame, Indiana, United States of America
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Kardena IM, Adi AAAM, Astawa NM, O’Dea M, Laurence M, Sahibzada S, Bruce M. Japanese encephalitis in Bali, Indonesia: ecological and socio-cultural perspectives. Int J Vet Sci Med 2021; 9:31-43. [PMID: 34589543 PMCID: PMC8451599 DOI: 10.1080/23144599.2021.1975879] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 08/17/2021] [Accepted: 08/22/2021] [Indexed: 12/28/2022] Open
Abstract
The increasing number of cases of acute encephalitis syndrome, a key presenting clinical sign of Japanese encephalitis infection in humans, along with increasing laboratory confirmed cases in Bali over recent years have led to the Indonesian government developing a national program of vaccination against Japanese encephalitis virus. In order to inform multidisciplinary management, a review was conducted to assess Japanese encephalitis virus-related cases in humans and animals including their determinants and detection in vectors. Along with published literature, key data from local authorized officers in Bali have been used to convey the recent situation of the disease. Related surveys detected up to 92% of the local children had antibodies against the virus with the annual incidence estimated to be 7.1 per 100,000 children. Additionally, reports on young and adult cases of infection within international travellers infected in Bali were documented with both non-fatal and fatal outcomes. Further seroprevalence surveys detected up to 90% with antibodies to the virus in animal reservoirs. The detection of the virus in certain Culex mosquito species and high levels of seropositivity may be associated with greater risk of the virus transmission to the human population. It was also highlighted that local sociocultural practices for agriculture and livestock were potentially associated with the high density of the vector and the reservoirs, which then may lead to the risk of the disease transmission in the ecology of Bali.
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Affiliation(s)
- I Made Kardena
- Department of Biopathology, Faculty of Veterinary Medicine, Udayana University, Denpasar, Indonesia
- School of Veterinary Medicine, College of Science, Health, Engineering and Education, Murdoch University, Perth, Western Australia
| | - Anak Agung Ayu Mirah Adi
- Department of Biopathology, Faculty of Veterinary Medicine, Udayana University, Denpasar, Indonesia
| | - Nyoman Mantik Astawa
- Department of Biopathology, Faculty of Veterinary Medicine, Udayana University, Denpasar, Indonesia
| | - Mark O’Dea
- Department of Primary Industries and Regional Development, Dpird Diagnostics and Laboratory Services, Sustainability and Biosecurity, South Perth, Western Australia
| | - Michael Laurence
- School of Veterinary Medicine, College of Science, Health, Engineering and Education, Murdoch University, Perth, Western Australia
| | - Shafi Sahibzada
- School of Veterinary Medicine, College of Science, Health, Engineering and Education, Murdoch University, Perth, Western Australia
| | - Mieghan Bruce
- School of Veterinary Medicine, College of Science, Health, Engineering and Education, Murdoch University, Perth, Western Australia
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Kuwata R, Torii S, Shimoda H, Supriyono S, Phichitraslip T, Prasertsincharoen N, Takemae H, Bautista RCJT, Ebora VDBM, Abella JAC, Dargantes AP, Hadi UK, Setiyono A, Baltazar ET, Simborio LT, Agungpriyono S, Jittapalapong S, Rerkamnuaychoke W, Hondo E, Maeda K. Distribution of Japanese Encephalitis Virus, Japan and Southeast Asia, 2016-2018. Emerg Infect Dis 2021; 26:125-128. [PMID: 31855535 PMCID: PMC6924880 DOI: 10.3201/eid2601.190235] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
During 2016–2018, we conducted surveillance for Japanese encephalitis virus (JEV) in mosquitoes and pigs in Japan, Thailand, the Philippines, and Indonesia. Phylogenetic analyses demonstrated that our isolates (genotypes Ia, Ib, III, IV) were related to JEV isolates obtained from the same regions many years ago. Indigenous JEV strains persist in Asia.
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15
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Lopez AL, Raguindin PF, Aldaba JG, Avelino F, Sy AK, Heffelfinger JD, Silva MWT. Epidemiology of Japanese encephalitis in the Philippines prior to routine immunization. Int J Infect Dis 2021; 102:344-351. [DOI: 10.1016/j.ijid.2020.10.061] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 10/15/2020] [Accepted: 10/21/2020] [Indexed: 10/23/2022] Open
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Jahan I, Al Imam MH, Karim T, Muhit M, Hardianto D, Das MC, Smithers-Sheedy H, Badawi N, Khandaker G. Epidemiology of cerebral palsy in Sumba Island, Indonesia. Dev Med Child Neurol 2020; 62:1414-1422. [PMID: 32686098 DOI: 10.1111/dmcn.14616] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 05/15/2020] [Accepted: 05/15/2020] [Indexed: 11/28/2022]
Abstract
AIM To define the epidemiology, clinical characteristics, and rehabilitation status of children with cerebral palsy (CP) in Sumba Island, Indonesia. METHOD A community-based key informant method survey among children (aged <18y) with CP was conducted between March and August 2017. Children with suspected CP underwent detailed neurodevelopmental assessment by a multidisciplinary medical team. Socio-demographic characteristics, aetiology, motor type, motor severity, associated impairments, educational, and rehabilitation status were documented. RESULTS There were 130 children with clinically confirmed CP. The mean age at assessment was 8 years 11 months and 43.8% (n=57) of the children were female. The mean age at CP diagnosis was 6 years 5 months. Of these children, 46.9% (n=61) had post-neonatally acquired CP, most frequently because of vaccine-preventable infectious encephalopathy (73.8%, n=45). In total, 80.8% (n=105) had a predominantly spastic motor type of CP and 83.8% (n=109) were classified in Gross Motor Functional Classification System levels III to V. A total of 77.7% (n=101) had at least one associated impairment (speech 77.5%, intellectual 29.2%, visual 13.8%, hearing 20.0%, and epilepsy 13.5%). And 66.2% (n=86) had never received rehabilitation services. INTERPRETATION Post-neonatally acquired CP was common in this setting. Addressing preventable post-neonatally acquired risk factors for CP should be a public health priority. Earlier identification and diagnosis of CP would also provide new opportunities for early intervention and targeted rehabilitation services.
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Affiliation(s)
- Israt Jahan
- CSF Global, Dhaka, Bangladesh.,Asian Institute of Disability and Development, University of South Asia, Dhaka, Bangladesh.,School of Health, Medical and Applied Sciences, Central Queensland University, Rockhampton, QLD, Australia
| | - Mahmudul Hassan Al Imam
- CSF Global, Dhaka, Bangladesh.,Asian Institute of Disability and Development, University of South Asia, Dhaka, Bangladesh.,School of Health, Medical and Applied Sciences, Central Queensland University, Rockhampton, QLD, Australia
| | - Tasneem Karim
- CSF Global, Dhaka, Bangladesh.,Asian Institute of Disability and Development, University of South Asia, Dhaka, Bangladesh.,Discipline of Child and Adolescent Health, Sydney Medical School, The University of Sydney, Sydney, NSW, Australia.,Cerebral Palsy Alliance Research Institute, The University of Sydney, Sydney, NSW, Australia
| | - Mohammad Muhit
- CSF Global, Dhaka, Bangladesh.,Asian Institute of Disability and Development, University of South Asia, Dhaka, Bangladesh
| | | | - Manik Chandra Das
- CSF Global, Dhaka, Bangladesh.,Asian Institute of Disability and Development, University of South Asia, Dhaka, Bangladesh
| | - Hayley Smithers-Sheedy
- Discipline of Child and Adolescent Health, Sydney Medical School, The University of Sydney, Sydney, NSW, Australia.,Cerebral Palsy Alliance Research Institute, The University of Sydney, Sydney, NSW, Australia
| | - Nadia Badawi
- Discipline of Child and Adolescent Health, Sydney Medical School, The University of Sydney, Sydney, NSW, Australia.,Cerebral Palsy Alliance Research Institute, The University of Sydney, Sydney, NSW, Australia
| | - Gulam Khandaker
- CSF Global, Dhaka, Bangladesh.,Asian Institute of Disability and Development, University of South Asia, Dhaka, Bangladesh.,School of Health, Medical and Applied Sciences, Central Queensland University, Rockhampton, QLD, Australia.,Discipline of Child and Adolescent Health, Sydney Medical School, The University of Sydney, Sydney, NSW, Australia.,Central Queensland Public Health Unit, Central Queensland Hospital and Health Service, Rockhampton, QLD, Australia
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17
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Sasmono RT, Santoso MS, Pamai YWB, Yohan B, Afida AM, Denis D, Hutagalung IA, Johar E, Hayati RF, Yudhaputri FA, Haryanto S, Stubbs SCB, Blacklaws BA, Myint KSA, Frost SDW. Distinct Dengue Disease Epidemiology, Clinical, and Diagnosis Features in Western, Central, and Eastern Regions of Indonesia, 2017-2019. Front Med (Lausanne) 2020; 7:582235. [PMID: 33335904 PMCID: PMC7737558 DOI: 10.3389/fmed.2020.582235] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Accepted: 10/22/2020] [Indexed: 01/06/2023] Open
Abstract
The people of Indonesia have been afflicted by dengue, a mosquito-borne viral disease, for over 5 decades. The country is the world's largest archipelago with diverse geographic, climatic, and demographic conditions that may impact the dynamics of disease transmissions. A dengue epidemiology study was launched by us to compare and understand the dynamics of dengue and other arboviral diseases in three cities representing western, central, and eastern Indonesia, namely, Batam, Banjarmasin, and Ambon, respectively. A total of 732 febrile patients were recruited with dengue-like illness during September 2017-2019 and an analysis of their demographic, clinical, and virological features was performed. The seasonal patterns of dengue-like illness were found to be different in the three regions. Among all patients, 271 (37.0%) were virologically confirmed dengue, while 152 (20.8%) patients were diagnosed with probable dengue, giving a total number of 423 (57.8%) dengue patients. Patients' age and clinical manifestations also differed between cities. Mostly, mild dengue fever was observed in Batam, while more severe cases were prominent in Ambon. While all dengue virus (DENV) serotypes were detected, distinct serotypes dominated in different locations: DENV-1 in Batam and Ambon, and DENV-3 in Banjarmasin. We also assessed the diagnostic features in the study sites, which revealed different patterns of diagnostic agreements, particularly in Ambon. To detect the possibility of infection with other arboviruses, further testing on 461 DENV RT-PCR-negative samples was performed using pan-flavivirus and -alphavirus RT-PCRs; however, only one chikungunya infection was detected in Ambon. A diverse dengue epidemiology in western, central, and eastern Indonesia was observed, which is likely to be influenced by local geographic, climatic, and demographic conditions, as well as differences in the quality of healthcare providers and facilities. Our study adds a new understanding on dengue epidemiology in Indonesia.
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Affiliation(s)
| | | | | | | | - Anna M Afida
- Dr. H. M. Ansari Saleh Hospital, Banjarmasin, Indonesia
| | | | | | - Edison Johar
- Eijkman Institute for Molecular Biology, Jakarta, Indonesia
| | - Rahma F Hayati
- Eijkman Institute for Molecular Biology, Jakarta, Indonesia
| | | | | | - Samuel C B Stubbs
- Department of Veterinary Medicine, University of Cambridge, Cambridge, United Kingdom.,Department of Infectious Disease Epidemiology, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Barbara A Blacklaws
- Department of Veterinary Medicine, University of Cambridge, Cambridge, United Kingdom
| | - Khin S A Myint
- Eijkman Institute for Molecular Biology, Jakarta, Indonesia
| | - Simon D W Frost
- Department of Veterinary Medicine, University of Cambridge, Cambridge, United Kingdom.,Department of Infectious Disease Epidemiology, London School of Hygiene and Tropical Medicine, London, United Kingdom.,Microsoft Research, Redmond, WA, United States
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18
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Pyke AT, Choong K, Moore F, Schlebusch S, Taylor C, Hewitson G, McMahon J, Nair N, Moore P, Finger M, Burtonclay P, Wheatley S. A Case of Japanese Encephalitis with a Fatal Outcome in an Australian Who Traveled from Bali in 2019. Trop Med Infect Dis 2020; 5:tropicalmed5030133. [PMID: 32825150 PMCID: PMC7558094 DOI: 10.3390/tropicalmed5030133] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 08/12/2020] [Accepted: 08/14/2020] [Indexed: 11/16/2022] Open
Abstract
A severe case of Japanese encephalitis virus (JEV) infection, resulting in fatality, occurred in an unvaccinated Australian male traveler from Bali, Indonesia, in 2019. During hospitalisation in Australia, patient cerebrospinal fluid (CSF) yielded JEV-specific IgM antibodies and RNA, and an isolate of the virus. Ongoing transmission of JEV in Bali underscores this pathogen as a public health risk and the importance of appropriate health, vaccination and mosquito avoidance advice to prospective travelers to the region.
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Affiliation(s)
- Alyssa T. Pyke
- Public Health Virology Laboratory, Forensic and Scientific Services, Coopers Plains, QLD 4108, Australia; (F.M.); (S.S.); (C.T.); (G.H.); (J.M.); (N.N.); (P.M.); (M.F.); (P.B.); (S.W.)
- Correspondence:
| | - Keat Choong
- Sunshine Coast University Hospital, Birtinya, QLD 4575, Australia;
| | - Frederick Moore
- Public Health Virology Laboratory, Forensic and Scientific Services, Coopers Plains, QLD 4108, Australia; (F.M.); (S.S.); (C.T.); (G.H.); (J.M.); (N.N.); (P.M.); (M.F.); (P.B.); (S.W.)
| | - Sanmarié Schlebusch
- Public Health Virology Laboratory, Forensic and Scientific Services, Coopers Plains, QLD 4108, Australia; (F.M.); (S.S.); (C.T.); (G.H.); (J.M.); (N.N.); (P.M.); (M.F.); (P.B.); (S.W.)
- School of Medicine, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Carmel Taylor
- Public Health Virology Laboratory, Forensic and Scientific Services, Coopers Plains, QLD 4108, Australia; (F.M.); (S.S.); (C.T.); (G.H.); (J.M.); (N.N.); (P.M.); (M.F.); (P.B.); (S.W.)
| | - Glen Hewitson
- Public Health Virology Laboratory, Forensic and Scientific Services, Coopers Plains, QLD 4108, Australia; (F.M.); (S.S.); (C.T.); (G.H.); (J.M.); (N.N.); (P.M.); (M.F.); (P.B.); (S.W.)
| | - Jamie McMahon
- Public Health Virology Laboratory, Forensic and Scientific Services, Coopers Plains, QLD 4108, Australia; (F.M.); (S.S.); (C.T.); (G.H.); (J.M.); (N.N.); (P.M.); (M.F.); (P.B.); (S.W.)
| | - Neelima Nair
- Public Health Virology Laboratory, Forensic and Scientific Services, Coopers Plains, QLD 4108, Australia; (F.M.); (S.S.); (C.T.); (G.H.); (J.M.); (N.N.); (P.M.); (M.F.); (P.B.); (S.W.)
| | - Peter Moore
- Public Health Virology Laboratory, Forensic and Scientific Services, Coopers Plains, QLD 4108, Australia; (F.M.); (S.S.); (C.T.); (G.H.); (J.M.); (N.N.); (P.M.); (M.F.); (P.B.); (S.W.)
| | - Mitchell Finger
- Public Health Virology Laboratory, Forensic and Scientific Services, Coopers Plains, QLD 4108, Australia; (F.M.); (S.S.); (C.T.); (G.H.); (J.M.); (N.N.); (P.M.); (M.F.); (P.B.); (S.W.)
| | - Peter Burtonclay
- Public Health Virology Laboratory, Forensic and Scientific Services, Coopers Plains, QLD 4108, Australia; (F.M.); (S.S.); (C.T.); (G.H.); (J.M.); (N.N.); (P.M.); (M.F.); (P.B.); (S.W.)
| | - Sarah Wheatley
- Public Health Virology Laboratory, Forensic and Scientific Services, Coopers Plains, QLD 4108, Australia; (F.M.); (S.S.); (C.T.); (G.H.); (J.M.); (N.N.); (P.M.); (M.F.); (P.B.); (S.W.)
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Wu Y, Wu X, Chen J, Hu J, Huang X, Zhou B. A novel protein chip for simultaneous detection of antibodies against four epidemic swine viruses in China. BMC Vet Res 2020; 16:162. [PMID: 32456688 PMCID: PMC7249397 DOI: 10.1186/s12917-020-02375-7] [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: 02/13/2020] [Accepted: 05/14/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND At present, pig industry in China is faced with the complex situation of mixed infection caused by multiple pathogens. It is urgent to develop some new high-throughput molecular diagnosis assays to simultaneously detect pathogens or antibodies. Biochip array technology has made it possible to screen thousands of samples simultaneously; it has been twice named as one of the top 10 scientific and technological breakthroughs. Studies have reported encouraging results using protein biochips for detecting antibodies against avian infectious bronchitis virus and ruminant bluetongue virus, but the research of this technology for the diagnosis of swine diseases is still sparse. RESULTS In this study, a novel protein chip was developed that can simultaneously detect the antibodies of four important swine viruses as follow, classical swine fever virus (CSFV), porcine parvovirus (PPV), Japanese encephalitis virus (JEV), and porcine reproductive and respiratory syndrome virus (PRRSV). Four prokaryotic expression plasmids pET-32a-E2 of CSFV, -VP2 of PPV, -EDIII of JEV, and -N of PRRSV were induced by IPTG (Isopropyl β-D-1-Thiogalactopyranoside) and overexpressed in E.coli, respectively. The purified proteins were identified by Western blotting and then printed on epoxy-coated glass slides. The optimized parameters of this diagnostic chip showed that the spotting concentrations of E2、VP2、EDIII、N proteins were 0.2, 0.4, 0.4, and 0.4 mg/mL. The optimal primary and secondary antibody dilutions were 1:50 and 1: 600. Compared with the commercial ELISA (Enzyme-linked immunosorbent assay) kits, the positive and negative coincidence rates of this chip were 95.8% ~ 100 and 86.2% ~ 100%, as well as, no cross-reaction. CONCLUSION This protein chip provided a fast, specific, and sensitive method for simultaneous detection of antibodies in clinical serum samples. Compared with traditional methods, this protein chip can monitor very small amount of serum.
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Affiliation(s)
- Yue Wu
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Xudan Wu
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Jing Chen
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Jingfei Hu
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Xiaobo Huang
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Bin Zhou
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China.
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Systematic studies of Anopheles (Cellia) kochi (Diptera: Culicidae): Morphology, cytogenetics, cross-mating experiments, molecular evidence and susceptibility level to infection with nocturnally subperiodic Brugia malayi. Acta Trop 2020; 205:105300. [PMID: 31846614 DOI: 10.1016/j.actatropica.2019.105300] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 12/12/2019] [Accepted: 12/12/2019] [Indexed: 11/23/2022]
Abstract
Anopheles kochi Dӧnitz (Diptera: Culicidae) is a malaria vector in some countries in South and Southeast Asia. This is the first report to provide clear evidence that two different cytological forms of An. kochi are conspecific based on systematic studies. Two karyotypic forms, i.e., Form A (X1, X2, Y1) and a novel Form B (X1, X2, Y2) were obtained from a total of 15 iso-female lines collected from five provinces in Thailand. Form A was common in all provinces, whereas Form B was restricted to Ubon Ratchathani province. This study determined whether the two karyotypic variants of An. kochi exist as a single or cryptic species by performing cross-mating experiments in association with the sequencing of the second internal transcribed spacer (ITS2) of ribosomal DNA (rDNA), and cytochrome c oxidase subunit I (COI) of mitochondrial DNA (mtDNA). Cross-mating experiments between the two karyotypic forms revealed genetic compatibility by providing viable progenies through F2 generations. The two forms showed a high sequence similarity of those two DNA regions (average genetic distances: ITS2 = 0.002-0.005, COI = 0.000-0.009). The phylogenetic trees based on ITS2 and COI sequences also supported that four strains (from Bhutan, Cambodia, Indonesia, and Thailand) were all of the same species. Five sensilla types housed on the antennae of female An. kochi were observed under scanning electron microscopy (SEM). In addition, this study found that An. kochi was a refractory vector, revealed by 0% susceptibility rates to infection with nocturnally subperiodic Brugia malayi. The cibarial armature was a resistant mechanism, as it killed the microfilariae in the foregut before they penetrated into the developmental site.
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Ha Z, Li JF, Xie CZ, Li CH, Zhou HN, Zhang Y, Hao PF, Nan FL, Zhang JY, Han JC, Zhang H, Zhuang XY, Guo YC, Lu HJ, Jin NY. First detection and genomic characterization of porcine circovirus 3 in mosquitoes from pig farms in China. Vet Microbiol 2019; 240:108522. [PMID: 31902486 DOI: 10.1016/j.vetmic.2019.108522] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 11/21/2019] [Accepted: 11/21/2019] [Indexed: 12/31/2022]
Abstract
The porcine circovirus type 3 (PCV3) becomes an important causative agent of swine disease since its discovery in 2016. PCV3 infection exhibits a wide range of clinical syndromes causing substantial economic losses in swine industry. Previous studies have reported the detection of numerous known viruses including circovirus in mosquitoes. However, the transmission of PCV3 in field-caught mosquitoes remains largely unknown. This study aims to detect PCV3 infection in mosquitoes and analyze its genomic characteristics. Here, we performed a PCR to detect the PCV3 in 269 mosquito samples collected from pig farms located in Heilongjiang, Jilin, and Yunnan provinces. The proportion of PCV3-positive mosquitoes was 32.0 % (86/269), ranging from 21.4%-42.5% at farm level, which may imply that mosquito serves as a route of transmission for PCV3. To determine the possible origin of PCV3 in mosquitoes, 80 pig serum samples were collected from the pig farms where mosquito sampling was also performed. The proportion of PCV3-positive farms ranged from 15.0%-30.0 % in which infection of positive pigs positively correlated with mosquitoes carrying the virus. Additionally, we sequenced the entire genome of 6 strains of PCV3 in mosquitoes and 2 strains of PCV3 in pigs. Sequence analysis indicated a 100 % nucleotide similarity between mosquito and pig viral isolates that were all collected from similar farms. Phylogenetic analysis showed that PCV3 could be divided into two clades, PCV3a and PCV3b, and the PCV3 strains isolated in mosquitoes were distributed on the two clades. Our results demonstrate that mosquitoes may serve as a potential transmission vector in the life-cycle of PCV3, revealing possible transmission routes of PCV3.
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Affiliation(s)
- Zhuo Ha
- Institute of Military Veterinary Medicine, Academy of Military Medical Sciences, Changchun, 130122, China; College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
| | - Jin-Feng Li
- College of Veterinary Medicine, Jilin University, Changchun, 130012, China
| | - Chang-Zhan Xie
- Institute of Military Veterinary Medicine, Academy of Military Medical Sciences, Changchun, 130122, China; College of Animal Science and Technology, Jilin Agricultural University, Changchun, 130118, China
| | - Cheng-Hui Li
- Medical College, Yanbian University, Yanji, 133002, China
| | | | - Ying Zhang
- College of Veterinary Medicine, Jilin University, Changchun, 130012, China
| | - Peng-Fei Hao
- Institute of Military Veterinary Medicine, Academy of Military Medical Sciences, Changchun, 130122, China; College of Veterinary Medicine, Jilin University, Changchun, 130012, China
| | - Fu-Long Nan
- Institute of Military Veterinary Medicine, Academy of Military Medical Sciences, Changchun, 130122, China; College of Veterinary Medicine, Jilin University, Changchun, 130012, China
| | - Jin-Yong Zhang
- Institute of Military Veterinary Medicine, Academy of Military Medical Sciences, Changchun, 130122, China; College of Animal Science and Technology, Jilin Agricultural University, Changchun, 130118, China
| | - Ji-Cheng Han
- Institute of Military Veterinary Medicine, Academy of Military Medical Sciences, Changchun, 130122, China; Medical College, Yanbian University, Yanji, 133002, China
| | - He Zhang
- Institute of Military Veterinary Medicine, Academy of Military Medical Sciences, Changchun, 130122, China
| | - Xin-Yu Zhuang
- Institute of Military Veterinary Medicine, Academy of Military Medical Sciences, Changchun, 130122, China
| | - Ying-Cheng Guo
- Jilin Fengman Area Animal Prevention and Control Center, Jilin, 132013, China
| | - Hui-Jun Lu
- Institute of Military Veterinary Medicine, Academy of Military Medical Sciences, Changchun, 130122, China; Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou University, Yangzhou, 225009, China.
| | - Ning-Yi Jin
- Institute of Military Veterinary Medicine, Academy of Military Medical Sciences, Changchun, 130122, China; College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China; Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou University, Yangzhou, 225009, China.
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