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Bac BH, Nguyen H, Thao NTT, Duyen LT, Hanh VT, Dung NT, Khang LQ, An DM. Performance evaluation of nanotubular halloysites from weathered pegmatites in removing heavy metals from water through novel artificial intelligence-based models and human-based optimization algorithm. Chemosphere 2021; 282:131012. [PMID: 34118630 DOI: 10.1016/j.chemosphere.2021.131012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Revised: 05/21/2021] [Accepted: 05/24/2021] [Indexed: 06/12/2023]
Abstract
The efforts of this study aimed to evaluate the feasibility of the nanotubular halloysites in weathered pegmatites (NaHWP) for removing heavy metals (i.e., Cd2+, Pb2+) from water. Furthermore, two novel intelligent models, such as teaching-learning-based optimization (TLBO)-artificial neural network (ANN), and TLBO-support vector regression (SVR), named as TLBO-ANN and TLBO-SVR models, respectively, were proposed to predict the Cd2+ and Pb2+ absorption efficiencies from water using the NaHWP absorbent. Databases used, including 53 experiments for Pb2+ absorption and 56 experiments for Cd2+ absorption from water, under the catalysis of different conditions, such as initial concentration of Pb2+ and Cd2+, solution pH, adsorbent weight, and contact time. Subsequently, the TLBO-ANN and TLBO-SVR models were developed and applied to predict the efficiencies of Cd2+ and Pb2+ absorption from water, aiming to evaluate the role as well as the effects of different conditions on the absorption efficiencies using the NaHWP absorbent. The standalone ANN and SVM models were also taken into consideration and compared with the proposed hybrid models (i.e., TLBO-ANN and TLBO-SVR). The results showed that the NaHWP detected in a Kaolin mine (Vietnam) with 70% nanotubular halloysites is a potential adsorbent for water treatment to eliminate heavy metals from water. The two novel hybrid models proposed, i.e., TLBO-ANN and TLBO-SVR, also yielded the dominant performances and accuracies in predicting the Cd2+ and Pb2+ absorption efficiencies from water, i.e., RMSE = 1.190 and 1.102, R2 = 0.951 and 0.957, VAF = 94.436 and 95.028 for the TLBO-ANN and TLBO-SVR models, respectively, in predicting the Pb2+ absorption efficiency from water; RMSE = 3.084 and 3.442, R2 = 0.971 and 0.965, VAF = 96.499 and 96.415 for the TLBO-ANN and TLBO-SVR models, respectively, in predicting the Cd2+ absorption efficiency from water. Furthermore, the validation results also demonstrated these findings in practice through 23 experiments with the accuracies of 98.3% and 98.37% for the TLBO-ANN and TLBO-SVR models, respectively, in predicting the Pb2+ absorption efficiency from water; the accuracies of 98.3% and 97.46% for the TLBO-ANN and TLBO-SVR models, respectively, in predicting the Cd2+ absorption efficiency from water. Besides, solution pH was evaluated as the most critical parameter that can be adjusted to enhance the performance of the absorption of the heavy metals in this study. By using the NaHWP absorbent and the novel proposed intelligent models developed, heavy metals can be eliminated entirely from water, providing pure water/clean freshwater without any risk of adverse health effects for the short term or long term.
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Affiliation(s)
- Bui Hoang Bac
- Department of Exploration Geology, Faculty of Geosciences and Geoengineering, Hanoi University of Mining and Geology, 18 Vien st., Duc Thang ward, Bac Tu Liem dist., Hanoi, Viet Nam; Centre for Excellence in Analysis and Experiment, Hanoi University of Mining and Geology, 18 Vien st., Duc Thang ward, Bac Tu Liem dist., Hanoi, Viet Nam.
| | - Hoang Nguyen
- Department of Surface Mining, Mining Faculty, Hanoi University of Mining and Geology, 18 Vien st., Duc Thang ward, Bac Tu Liem dist., Hanoi, Viet Nam; Centre for Mining, Electro-Mechanical Research, Hanoi University of Mining and Geology, 18 Vien st., Duc Thang ward, Bac Tu Liem dist., Hanoi, Viet Nam.
| | - Nguyen Thi Thanh Thao
- Department of Exploration Geology, Faculty of Geosciences and Geoengineering, Hanoi University of Mining and Geology, 18 Vien st., Duc Thang ward, Bac Tu Liem dist., Hanoi, Viet Nam
| | - Le Thi Duyen
- Centre for Excellence in Analysis and Experiment, Hanoi University of Mining and Geology, 18 Vien st., Duc Thang ward, Bac Tu Liem dist., Hanoi, Viet Nam; Department of Chemistry, Faculty of Basic Science, Hanoi University of Mining and Geology, 18 Vien st., Duc Thang ward, Bac Tu Liem dist., Hanoi, Viet Nam
| | - Vo Thi Hanh
- Centre for Excellence in Analysis and Experiment, Hanoi University of Mining and Geology, 18 Vien st., Duc Thang ward, Bac Tu Liem dist., Hanoi, Viet Nam; Department of Chemistry, Faculty of Basic Science, Hanoi University of Mining and Geology, 18 Vien st., Duc Thang ward, Bac Tu Liem dist., Hanoi, Viet Nam
| | - Nguyen Tien Dung
- Department of Exploration Geology, Faculty of Geosciences and Geoengineering, Hanoi University of Mining and Geology, 18 Vien st., Duc Thang ward, Bac Tu Liem dist., Hanoi, Viet Nam
| | - Luong Quang Khang
- Department of Exploration Geology, Faculty of Geosciences and Geoengineering, Hanoi University of Mining and Geology, 18 Vien st., Duc Thang ward, Bac Tu Liem dist., Hanoi, Viet Nam
| | - Do Manh An
- Department of Exploration Geology, Faculty of Geosciences and Geoengineering, Hanoi University of Mining and Geology, 18 Vien st., Duc Thang ward, Bac Tu Liem dist., Hanoi, Viet Nam
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Cuong HQ, Hai ND, Linh HT, Hieu NT, Anh NH, Ton T, Dong TC, Thao VT, Tuoi DTH, Tuan ND, Loan HTK, Long NT, Thang CM, Thao NTT, Lan PT. The Production of Standardized Samples with Known Concentrations for Severe Acute Respiratory Syndrome Coronavirus 2 RT-qPCR Testing Validation for Developing Countries in the Period of the Pandemic Era. Biomed Res Int 2021; 2021:5516344. [PMID: 34368349 PMCID: PMC8337105 DOI: 10.1155/2021/5516344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 07/11/2021] [Accepted: 07/19/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has caused a pandemic of pneumonia spreading around the world, leading to serious threats to public health and attracting enormous attention. There is an urgent need for sensitive diagnostic testing implementation to control and manage SARS-CoV-2 in public health laboratories. The quantitative reverse transcription PCR (RT-qPCR) assay is the gold standard method, but the sensitivity and specificity of SARS-CoV-2 testing are dependent on a number of factors. METHODS We synthesized RNA based on the genes published to estimate the concentration of inactivated virus samples in a biosafety level 3 laboratory. The limit of detection (LOD), linearity, accuracy, and precision were evaluated according to the bioanalytical method validation guidelines. RESULTS We found that the LOD reached around 3 copies/reaction. Furthermore, intra-assay precision, accuracy, and linearity met the accepted criterion with an RSD for copies of less than 25%, and linear regression met the accepted R 2 of 0.98. CONCLUSIONS We suggest that synthesized RNA based on the database of the NCBI gene bank for estimating the concentration of inactivated virus samples provides a potential opportunity for reliable testing to diagnose coronavirus disease 2019 (COVID-19) as well as limit the spread of the disease. This method may be relatively quick and inexpensive, and it may be useful for developing countries during the pandemic era. In the long term, it is also applicable for evaluation, verification, validation, and external quality assessment.
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Affiliation(s)
- Hoang Quoc Cuong
- Microbiology and Immunology Department, Planning Division, Medical Testing and Calibration Centers, Medical Analysis Department, Pasteur Institute in Ho Chi Minh City, Vietnam
| | - Nguyen Duc Hai
- Microbiology and Immunology Department, Planning Division, Medical Testing and Calibration Centers, Medical Analysis Department, Pasteur Institute in Ho Chi Minh City, Vietnam
| | - Hoang Thuy Linh
- Microbiology and Immunology Department, Planning Division, Medical Testing and Calibration Centers, Medical Analysis Department, Pasteur Institute in Ho Chi Minh City, Vietnam
| | - Nguyen Trung Hieu
- Microbiology and Immunology Department, Planning Division, Medical Testing and Calibration Centers, Medical Analysis Department, Pasteur Institute in Ho Chi Minh City, Vietnam
| | - Nguyen Hoang Anh
- Microbiology and Immunology Department, Planning Division, Medical Testing and Calibration Centers, Medical Analysis Department, Pasteur Institute in Ho Chi Minh City, Vietnam
| | - Tran Ton
- Microbiology and Immunology Department, Planning Division, Medical Testing and Calibration Centers, Medical Analysis Department, Pasteur Institute in Ho Chi Minh City, Vietnam
| | - Tran Cat Dong
- Faculty of Pharmacy, University of Medicine and Pharmacy at Ho Chi Minh City, Vietnam
| | - Vu Thanh Thao
- Faculty of Pharmacy, University of Medicine and Pharmacy at Ho Chi Minh City, Vietnam
| | - Do Thi Hong Tuoi
- Faculty of Pharmacy, University of Medicine and Pharmacy at Ho Chi Minh City, Vietnam
| | - Nguyen Duc Tuan
- Faculty of Pharmacy, University of Medicine and Pharmacy at Ho Chi Minh City, Vietnam
| | - Huynh Thi Kim Loan
- Microbiology and Immunology Department, Planning Division, Medical Testing and Calibration Centers, Medical Analysis Department, Pasteur Institute in Ho Chi Minh City, Vietnam
| | - Nguyen Thanh Long
- Microbiology and Immunology Department, Planning Division, Medical Testing and Calibration Centers, Medical Analysis Department, Pasteur Institute in Ho Chi Minh City, Vietnam
| | - Cao Minh Thang
- Microbiology and Immunology Department, Planning Division, Medical Testing and Calibration Centers, Medical Analysis Department, Pasteur Institute in Ho Chi Minh City, Vietnam
| | - Nguyen Thi Thanh Thao
- Microbiology and Immunology Department, Planning Division, Medical Testing and Calibration Centers, Medical Analysis Department, Pasteur Institute in Ho Chi Minh City, Vietnam
| | - Phan Trong Lan
- Microbiology and Immunology Department, Planning Division, Medical Testing and Calibration Centers, Medical Analysis Department, Pasteur Institute in Ho Chi Minh City, Vietnam
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Thao NTT, Nguyen DH, Kien PT, Duong TT, Lien NTK, Tri DQ, Linh DTT, Lan NT. Effect of Magnetic Magnetite (Fe₃O₄) Nanoparticle Size on Arsenic (V) Removal from Water. J Nanosci Nanotechnol 2021; 21:2576-2581. [PMID: 33500078 DOI: 10.1166/jnn.2021.19113] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Magnetic magnetite (Fe₃O₄) nanoparticles with average sizes of 5.11, 10.53, and 14.76 nm were synthesized by the chemical co-precipitation method. The surface area of Fe₃O₄ nanoparticles (average size of 5.11 nm) had the largest value of 167 m²/g. The adsorption capacity for removing arsenic (As(V)) from water at 3 ppm concentration was investigated by atomic absorption spectroscopy. Results showed that the As(V) adsorption capacity of Fe₃O₄ was dependent on particle size. The maximum absorption efficiency (Hmax) reached 99.02%, the equilibrium time was 30 min; the maximum Langmuir isotherm adsorption capacity was 14.46 mg/g with Fe₃O₄ nanoparticle an average size of 5 nm. The results indicate that reducing the size of Fe₃O₄ nanoparticles is a promised way for As(V) ion removal from water and wastewater treatment.
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Affiliation(s)
- N T T Thao
- Advanced Institute for Science and Technology, Hanoi University of Science and Technology, Hanoi 112400, Vietnam
| | - D H Nguyen
- Advanced Institute for Science and Technology, Hanoi University of Science and Technology, Hanoi 112400, Vietnam
| | - Pham The Kien
- Advanced Institute for Science and Technology, Hanoi University of Science and Technology, Hanoi 112400, Vietnam
| | - Thanh-Tung Duong
- Advanced Institute for Science and Technology, Hanoi University of Science and Technology, Hanoi 112400, Vietnam
| | - Nguyen Thi Kim Lien
- Advanced Institute for Science and Technology, Hanoi University of Science and Technology, Hanoi 112400, Vietnam
| | - Doan Quang Tri
- Advanced Institute for Science and Technology, Hanoi University of Science and Technology, Hanoi 112400, Vietnam
| | - Duong Thi Thuy Linh
- School of Environmental Science and Technology, Hanoi University of Science and Technology, Hanoi 112400, Vietnam
| | - N T Lan
- Advanced Institute for Science and Technology, Hanoi University of Science and Technology, Hanoi 112400, Vietnam
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Nguyet LA, Thanh TT, Nhan LNT, Hong NTT, Nhu LNT, Van HMT, Ny NTH, Anh NT, Han DDK, Tuan HM, Huy VQ, Viet HL, Cuong HQ, Thao NTT, Viet DC, Khanh TH, Thwaites L, Clapham H, Hung NT, Chau NVV, Thwaites G, Ha DQ, van Doorn HR, Tan LV. Neutralizing Antibodies against Enteroviruses in Patients with Hand, Foot and Mouth Disease. Emerg Infect Dis 2021; 26:298-306. [PMID: 31961293 PMCID: PMC6986819 DOI: 10.3201/eid2602.190721] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Hand, foot and mouth disease (HFMD) is an emerging infection with pandemic potential. Knowledge of neutralizing antibody responses among its pathogens is essential to inform vaccine development and epidemiologic research. We used 120 paired-plasma samples collected at enrollment and >7 days after the onset of illness from HFMD patients infected with enterovirus A71 (EV-A71), coxsackievirus A (CVA) 6, CVA10, and CVA16 to study cross neutralization. For homotypic viruses, seropositivity increased from <60% at enrollment to 97%-100% at follow-up, corresponding to seroconversion rates of 57%-93%. Seroconversion for heterotypic viruses was recorded in only 3%-23% of patients. All plasma samples from patients infected with EV-A71 subgenogroup B5 could neutralize the emerging EV-A71 subgenogroup C4. Collectively, our results support previous reports about the potential benefit of EV-A71 vaccine but highlight the necessity of multivalent vaccines to control HFMD.
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Anh DD, Choisy M, Clapham HE, Cuong HQ, Dung VTV, Duong TN, Hang NLK, Ha HTT, Hien NT, Hoa TTN, Hung TTM, Huong VTL, Huyen DTT, Khanh NC, Lewycka SO, Linley E, Mai LTQ, Nadjm B, Nghia ND, Pebody R, Phuong HVM, Tan LM, Van Tan L, Thai PQ, Thanh LV, Le Thanh NT, Thuy NTT, Thuong NT, Thanh LT, Thao NTT, Tuan NA, Uyen PTN, Rogier van Doorn H. Plans for Nationwide Serosurveillance Network in Vietnam. Emerg Infect Dis 2019; 26. [PMID: 31855527 PMCID: PMC6924907 DOI: 10.3201/eid2601.190641] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
In recent years, serosurveillance has gained momentum as a way of determining disease transmission and immunity in populations, particularly with respect to vaccine-preventable diseases. At the end of 2017, the Oxford University Clinical Research Unit and the National Institute of Hygiene and Epidemiology held a meeting in Vietnam with national policy makers, researchers, and international experts to discuss current seroepidemiologic projects in Vietnam and future needs and plans for nationwide serosurveillance. This report summarizes the meeting and the plans that were discussed to set up nationwide serosurveillance in Vietnam.
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Chiu ML, Luo ST, Chen YY, Chung WY, Duong V, Dussart P, Chan YF, Perera D, Ooi MH, Thao NTT, Truong HK, Lee MS. Establishment of Asia-Pacific Network for Enterovirus Surveillance. Vaccine 2019; 38:1-9. [PMID: 31679864 DOI: 10.1016/j.vaccine.2019.09.111] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 09/16/2019] [Accepted: 09/30/2019] [Indexed: 12/11/2022]
Abstract
Enteroviruses (EV), the major pathogens of hand, foot, and mouth disease (HFMD) and herpangina, affect millions of children each year. Most human enteroviruses cause self-limited infections except polioviruses, enterovirus A71 (EV-A71), enterovirus D68 (EV-D68), and several echoviruses (Echo) and coxsackieviruses (CV). Especially, EV-A71 has repeatedly caused large-scale outbreaks in the Asia-Pacific region since 1997. Some Asian countries have experienced cyclical outbreaks of severe EV-A71 infections and initiated development of EV-A71 vaccines. Five EV-A71 vaccine candidates have been clinically evaluated and three of them were approved for marketing in China. However, none of the China-approved products seek marketing approval in other countries. This situation supports a role for collaboration among Asian countries to facilitate clinical trials and licensure of EV-A71 vaccines. Additionally, enterovirus D68 outbreaks have been reported in the US and Taiwan currently and caused severe complications and deaths. Hence, an Asia-Pacific Network for Enterovirus Surveillance (APNES) has been established to estimate disease burden, understand virus evolution, and facilitate vaccine development through harmonizing laboratory diagnosis and data collection. Founded in 2017, the APNES is comprised of internationally recognized experts in the field of enterovirus in Asian countries working to raise awareness of this potentially fatal and debilitating disease. This article demonstrated the summaries of the first expert meeting, 2017 International Workshop on Enterovirus Surveillance and Vaccine Development, held by APNES in Taipei, Taiwan, March 2017.
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Affiliation(s)
- Mu-Lin Chiu
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Zhunan, Taiwan
| | - Shu-Ting Luo
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Zhunan, Taiwan
| | - Ya-Yen Chen
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Zhunan, Taiwan
| | - Wan Yu Chung
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Zhunan, Taiwan
| | - Veasna Duong
- Virology Unit, Institut Pasteur du Cambodge, Cambodia
| | | | - Yoke-Fun Chan
- Department of Medical Microbiology, Faculty of Medicine, University Malaya, Malaysia
| | - David Perera
- Institute of Health & Community Medicine, Universiti Malaysia Sarawak, Malaysia
| | - Mong How Ooi
- Institute of Health & Community Medicine, Universiti Malaysia Sarawak, Malaysia; Sarawak General Hospital, Sarawak, Malaysia
| | | | - Huu Khanh Truong
- Department of Infectious Diseases, Children Hospital 1, Ho Chi Minh City, Viet Nam
| | - Min-Shi Lee
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Zhunan, Taiwan.
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Huyen DTT, Hong DT, Trung NT, Hoa TTN, Oanh NK, Thang HV, Thao NTT, Hung DM, Iijima M, Fox K, Grabovac V, Heffelfinger J, Batmunkh N, Anh DD. Epidemiology of acute diarrhea caused by rotavirus in sentinel surveillance sites of Vietnam, 2012-2015. Vaccine 2018; 36:7894-7900. [PMID: 29784467 DOI: 10.1016/j.vaccine.2018.05.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Revised: 04/10/2018] [Accepted: 05/01/2018] [Indexed: 11/26/2022]
Abstract
A prospective, multicentre study was conducted in four sentinel surveillance hospitals to assess the trend and epidemiology of acute diarrhea caused by Rotavirus in Vietnam. During the period 2012-2015, a total 8,889 children under 5 years of age were enrolled in the surveillance, and 8689 stool samples were collected. Of these cases, Rotavirus was most common pathogen 46.7% (4054 cases); in which 26.6% (1117) rotavirus-positive stool samples were evaluated to identify genotypes. The proportion of rotavirus positive specimens decreased annually from 54.7% in 2012 to 36.6% in 2015. Rotavirus was detected year-round, but most rotavirus gastroenteritis cases (77.1%) occurred between December and May, corresponding to the rotavirus seasonality. It is found that the peaks varied by regions. Rotavirus positivities varied between the youngest and oldest age, but children 6-11 months old (38.8%) and 12-23 months old (38.4%) counted for most cases. A significant higher number of diarrhea within 24 hours (8.3 times, 95%CI: 8.1-8.4 times) and higher proportion of severe dehydration (12.9%) in Rotavirus positive group than that in Rotavirus negative group (7.7 times, 95%CI: 7.6-7.9 times; and 9.7%, respectively). A downtrend of prevalence of G1P[8] was observed from 82% in 2013 to 15% in 2015. However, G2P[4] was found in 5% of samples in 2012, 9% in 2013, 36% in 2014, and 28% in 2015. Rotavirus infection is the most important cause of acute diarrhea among hospitalized children in Vietnam, and a rotavirus vaccination program for children may significantly reduce this disease.
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Affiliation(s)
| | - Duong Thi Hong
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | | | | | | | | | | | | | | | - Kimberley Fox
- Global Immunization Division, Centers for Diesease Control and Prevention, USA.
| | - Varja Grabovac
- Expanded Programme on Immunization, Division of Communicable Diseases, Western Pacific Regional Office, Manila, Philippines.
| | - James Heffelfinger
- Expanded Programme on Immunization, Division of Communicable Diseases, Western Pacific Regional Office, Manila, Philippines.
| | - Nyambat Batmunkh
- Expanded Programme on Immunization, Division of Communicable Diseases, Western Pacific Regional Office, Manila, Philippines.
| | - Dang Duc Anh
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam.
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8
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Thao NTT, Donato C, Trang VTH, Kien NT, Trang PMT, Khanh TQ, Nguyet DT, Sessions OM, Cuong HQ, Lan PT, Huong VTQ, van Doorn HR, Vijaykrishna D. Evolution and Spatiotemporal Dynamics of Enterovirus A71 Subgenogroups in Vietnam. J Infect Dis 2017; 216:1371-1379. [PMID: 29029128 PMCID: PMC5853389 DOI: 10.1093/infdis/jix500] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Accepted: 09/14/2017] [Indexed: 12/18/2022] Open
Abstract
Background Enterovirus A71 (EV-A71) is the major cause of severe hand, foot, and mouth disease and viral encephalitis in children across the Asia-Pacific region, including in Vietnam, which has experienced a high burden of disease in recent years. Multiple subgenogroups (C1, C4, C5, and B5) concurrently circulate in the region with a large variation in epidemic severity. The relative differences in their evolution and epidemiology were examined within Vietnam and globally. Methods A total of 752 VP1 gene sequences were analyzed (413 generated in this study combined with 339 obtained from GenBank), collected from patients in 36 provinces in Vietnam during 2003-2013, along with epidemiological metadata. Globally representative VP1 gene datasets of subgenogroups were used to coestimate time-resolved phylogenies and relative genetic diversity to infer virus origins and regional transmission network. Results Despite frequent virus migration between countries, the highest genetic diversity of individual subgenogroups was maintained independently for several years in specific Asian countries representing genogroup-specific sources of EV-A71 diversity. Conclusion This study highlights a persistent transmission network of EV-A71, with specific Asian countries seeding other countries in the region and beyond, emphasizing the need for improved EV-A71 surveillance and detailed genetic and antigenic characterization.
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Affiliation(s)
- Nguyen Thi Thanh Thao
- Immunology and Microbiology Department, Pasteur Institute, Ho Chi Minh City, Vietnam
| | - Celeste Donato
- Program in Emerging Infectious Diseases, Duke-NUS Medical School Singapore
| | - Vu Thi Huyen Trang
- Immunology and Microbiology Department, Pasteur Institute, Ho Chi Minh City, Vietnam
| | - Nguyen Trung Kien
- Immunology and Microbiology Department, Pasteur Institute, Ho Chi Minh City, Vietnam
| | - Phạm Mai Thuy Trang
- Immunology and Microbiology Department, Pasteur Institute, Ho Chi Minh City, Vietnam
| | - Tran Quoc Khanh
- Immunology and Microbiology Department, Pasteur Institute, Ho Chi Minh City, Vietnam
| | - Dang Thi Nguyet
- Immunology and Microbiology Department, Pasteur Institute, Ho Chi Minh City, Vietnam
| | - October M Sessions
- Program in Emerging Infectious Diseases, Duke-NUS Medical School Singapore
| | - Hoang Quoc Cuong
- Immunology and Microbiology Department, Pasteur Institute, Ho Chi Minh City, Vietnam
| | - Phan Trong Lan
- Immunology and Microbiology Department, Pasteur Institute, Ho Chi Minh City, Vietnam
| | - Vu Thi Que Huong
- Immunology and Microbiology Department, Pasteur Institute, Ho Chi Minh City, Vietnam
| | | | - Dhanasekaran Vijaykrishna
- Program in Emerging Infectious Diseases, Duke-NUS Medical School Singapore
- Biomedicine Discovery Institute and Department of Microbiology, Monash University, Melbourne, Victoria, Australia
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Abstract
As of 13 July 2016, 13 countries have reported fetal Zika virus (ZIKV) infection. Here we report a case of fetal ZIKV infection that resulted from an infection originating in Vietnam.
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Affiliation(s)
| | - Luong Chan Quang
- Department of Prevention and Control Diseases, Pasteur Institute, Ho Chi Minh City, Vietnam
| | - Vu Thi Que Huong
- Microbiology and Immumnology, Pasteur Institute, Ho Chi Minh City, Vietnam
| | | | - Phan Cong Hung
- Department of Prevention and Control Diseases, Pasteur Institute, Ho Chi Minh City, Vietnam
| | | | | | - Nguyen Thi Thanh Thao
- Department of Prevention and Control Diseases, Pasteur Institute, Ho Chi Minh City, Vietnam
| | - Anthony W Mounts
- Division of Global Health Protection, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Leisha D Nolen
- Arctic Investigation Program, Centers for Disease Control and Prevention, Anchorage, Alaska, USA
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Utkin YN, Kasheverov IE, Kudryavtsev DS, Andreeva TV, Starkov VG, Ziganshin RH, Kuznetsov DV, Anh HN, Thao NTT, Khoa NC, Tsetlin VI. Nonconventional three-finger toxin BMLCL from krait Bungarus multicinctus venom with high affinity interacts with nicotinic acetylcholine receptors. DOKL BIOCHEM BIOPHYS 2015; 464:294-7. [PMID: 26518551 DOI: 10.1134/s1607672915050099] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Indexed: 12/16/2022]
Abstract
Nonconventional three-finger toxin BMLCL was isolated from B. multicinctus venom, and its interaction with different subtypes of nicotinic acetylcholine receptor (nAChR) was studied. It was found that BMLCL is able to interact with high efficiency with both α7 and muscle type nAChRs.
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Affiliation(s)
- Yu N Utkin
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, ul. Miklukho-Maklaya 16/10, Moscow, 117997, Russia. .,The National University of Science and Technology MISiS, Moscow, Russia.
| | - I E Kasheverov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, ul. Miklukho-Maklaya 16/10, Moscow, 117997, Russia.,Syneuro Ltd., Moscow, Russia
| | - D S Kudryavtsev
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, ul. Miklukho-Maklaya 16/10, Moscow, 117997, Russia.,Syneuro Ltd., Moscow, Russia
| | - T V Andreeva
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, ul. Miklukho-Maklaya 16/10, Moscow, 117997, Russia
| | - V G Starkov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, ul. Miklukho-Maklaya 16/10, Moscow, 117997, Russia
| | - R H Ziganshin
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, ul. Miklukho-Maklaya 16/10, Moscow, 117997, Russia
| | - D V Kuznetsov
- The National University of Science and Technology MISiS, Moscow, Russia
| | - Hoang Ngoc Anh
- Institute of Applied Materials Science, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - Nguyen Thi Thanh Thao
- Institute of Applied Materials Science, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - Nguyen Cuu Khoa
- Institute of Applied Materials Science, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - V I Tsetlin
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, ul. Miklukho-Maklaya 16/10, Moscow, 117997, Russia
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11
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Utkin YN, Gantsova EA, Andreeva TV, Starkov VG, Ziganshin RH, Anh HN, Thao NTT, Khoa NC, Tsetlin VI. Venoms of kraits Bungarus multicinctus and Bungarus fasciatus contain anticoagulant proteins. DOKL BIOCHEM BIOPHYS 2015; 460:53-8. [DOI: 10.1134/s1607672915010159] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Indexed: 11/23/2022]
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12
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Huu TN, Quang LC, Quoc DK, Van Tinh P, Loan HTK, Thao NTT, Van Tu P, Huong VTQ. The viral agents of Acute Encephalitis Sydrome in Ben Tre province 2008-2010. BMC Proc 2011. [DOI: 10.1186/1753-6561-5-s1-p115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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13
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Huu TN, Quang LC, Quoc DK, Van Tinh P, Loan HTK, Thao NTT, Van Tu P, Huong VTQ. The viral agents of Acute Encephalitis Sydrome in Ben Tre province 2008-2010. BMC Proc 2011. [PMCID: PMC3019431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
| | | | | | | | | | | | - Phan Van Tu
- Pasteur Institute of Ho Chi Minh City, Vietnam
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14
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Thao NTT, Ngoc NTK, Tú PV, Thúy TT, Cardosa MJ, McMinn PC, Phuektes P. Development of a multiplex polymerase chain reaction assay for simultaneous identification of human enterovirus 71 and coxsackievirus A16. J Virol Methods 2010; 170:134-9. [PMID: 20863857 PMCID: PMC2995219 DOI: 10.1016/j.jviromet.2010.09.017] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2010] [Revised: 09/09/2010] [Accepted: 09/13/2010] [Indexed: 11/20/2022]
Abstract
Human enterovirus 71 (HEV71) and coxsackievirus A16 (CVA16) are two major aetiological agents of hand, foot and mouth disease (HFMD) in children. Recently there have been several large outbreaks of HFMD in Vietnam and the Asia-Pacific region. In this study, a multiplex RT-PCR assay was developed in order to detect simultaneously HEV71, CVA16 and other human enteroviruses. Enterovirus detection was performed with a mixture of three pairs of oligonucleotide primers: one pair of published primers for amplifying all known enterovirus genomes and two new primer pairs specific for detection of the VP1 genes of HEV71 and CVA16. Enterovirus isolates, CVA16 and HEV71 strains identified previously from patients with HFMD were examined to evaluate the sensitivity and specificity of the multiplex RT-PCR assay. The assay was then applied to the direct detection of these viruses in clinical specimens obtained from HFMD cases identified at Children's Hospital Number 2, Ho Chi Minh City, Vietnam. The multiplex RT-PCR assay showed 100% specificity in screening for enteroviruses and in identifying HEV71 and CVA16. Similar results were obtained when using the multiplex RT-PCR assay to screen for enteroviruses and to identify HEV71 and CVA16 in clinical specimens obtained from HFMD cases identified at the hospital. This multiplex RT-PCR assay is a rapid, sensitive and specific assay for the diagnosis of HEV71 or CVA16 infection in cases of HFMD and is also potentially useful for molecular epidemiological investigations.
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Affiliation(s)
- Nguyen Thi Thanh Thao
- Pasteur Institute of Ho Chi Minh City, 167 Pasteur Street, District 3, Ho Chi Minh City, Viet Nam
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15
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Van Tu P, Thao NTT, Perera D, Truong KH, Tien NTK, Thuong TC, How OM, Cardosa MJ, McMinn PC. Epidemiologic and virologic investigation of hand, foot, and mouth disease, southern Vietnam, 2005. Emerg Infect Dis 2008; 13:1733-41. [PMID: 18217559 PMCID: PMC3375788 DOI: 10.3201/eid1311.070632] [Citation(s) in RCA: 281] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Human enterovirus 71, but not coxsackievirus A16, is strongly associated with acute neurologic disease. During 2005, 764 children were brought to a large children’s hospital in Ho Chi Minh City, Vietnam, with a diagnosis of hand, foot, and mouth disease. All enrolled children had specimens (vesicle fluid, stool, throat swab) collected for enterovirus isolation by cell culture. An enterovirus was isolated from 411 (53.8%) of the specimens: 173 (42.1%) isolates were identified as human enterovirus 71 (HEV71) and 214 (52.1%) as coxsackievirus A16. Of the identified HEV71 infections, 51 (29.5%) were complicated by acute neurologic disease and 3 (1.7%) were fatal. HEV71 was isolated throughout the year, with a period of higher prevalence in October–November. Phylogenetic analysis of 23 HEV71 isolates showed that during the first half of 2005, viruses belonging to 3 subgenogroups, C1, C4, and a previously undescribed subgenogroup, C5, cocirculated in southern Vietnam. In the second half of the year, viruses belonging to subgenogroup C5 predominated during a period of higher HEV71 activity.
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Affiliation(s)
- Phan Van Tu
- Pasteur Institute, Ho Chi Minh City, Vietnam
| | | | - David Perera
- Universiti Malaysia Sarawak, Kota Samarahan, Sarawak, Malaysia
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16
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Perera D, Yusof MA, Podin Y, Ooi MH, Thao NTT, Wong KK, Zaki A, Chua KB, Malik YA, Tu PV, Tien NTK, Puthavathana P, McMinn PC, Cardosa MJ. Molecular phylogeny of modern coxsackievirus A16. Arch Virol 2007; 152:1201-8. [PMID: 17308978 DOI: 10.1007/s00705-006-0934-5] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2006] [Accepted: 12/21/2006] [Indexed: 10/23/2022]
Abstract
A phylogenetic analysis of VP1 and VP4 nucleotide sequences of 52 recent CVA16 strains demonstrated two distinct CVA16 genogroups, A and B, with the prototype strain being the only member of genogroup A. CVA16 G-10, the prototype strain, showed a nucleotide difference of 27.7-30.2% and 19.9-25.2% in VP1 and VP4, respectively, in relation to other CVA16 strains, which formed two separate lineages in genogroup B with nucleotide variation of less than 13.4% and less than 16.3% in VP1 and VP4, respectively. Lineage 1 strains circulating before 2000 were later displaced by lineage 2 strains.
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Affiliation(s)
- D Perera
- Institute of Health and Community Medicine, Universiti Malaysia Sarawak, Sarawak, Malaysia
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