1
|
Trinh CD, Le VN, Le VNB, Pham NT, Le VD. Lung abnormalities on computed tomography of Vietnamese patients with COVID-19 and the association with medical variables. IJID Reg 2024; 10:183-190. [PMID: 38351902 PMCID: PMC10862005 DOI: 10.1016/j.ijregi.2024.01.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 01/14/2024] [Accepted: 01/15/2024] [Indexed: 02/16/2024]
Abstract
Objectives Patients with COVID-19 may experience a lung injury without presenting clinical symptoms. Early detection of lung injury in patients with COVID-19 is required to enhance prediction and prevent severe progression. Methods Lung lesions in patients with COVID-19 were defined using the Fleischner Society terminology. Chest computed tomography lesions and their correlation with demographic characteristics and medical variables were identified. Results Patients with mild and moderate COVID-19 had up to 45% lung injuries, whereas critical patients had 55%. However, patients with mild and moderate COVID-19 typically had low-level lung injuries. Ground-glass (68.1%), consolidation (48.8%), opacity (36.3%), and nodular (6.9%) lung lesions were the most prevalent in patients with COVID-19. Patients with COVID-19 infected with the Delta variant had worse lung injury than those infected with the Alpha and Omicron. People vaccinated with ≥2 doses showed a lower risk of lung injury than those vaccinated with <1 dose. Patients <18 years old were less likely to have a lung injury than patients >18 years old. The treatment outcomes were unaffected by the severity of the lung injury. Conclusion Patients with mild COVID-19 had a similar risk of lung injury as patients with severe COVID-19. Thus, using chest computed tomography to detect lung injury can enhance the treatment outcomes and reduce the patient's risk of pulmonary complications.
Collapse
Affiliation(s)
- Cong Dien Trinh
- Departments of Infectious Disease, Military Hospital 103, Hanoi, Vietnam
| | - Van Nam Le
- Departments of Infectious Disease, Military Hospital 103, Hanoi, Vietnam
| | | | - Ngoc Thach Pham
- Micobiology and Molecular Biology Department, National Hospital for Tropical Diseases, Hanoi, Vietnam
| | - Van Duyet Le
- Micobiology and Molecular Biology Department, National Hospital for Tropical Diseases, Hanoi, Vietnam
| |
Collapse
|
2
|
Tran TT, Ho PD, Luu NAT, Truong TYN, Nguyen HVK, Bui HT, Pham NT, Tran DA, Pirotte T, Gurevich M, Reding R. Implementing living-donor pediatric liver transplantation in Southern Vietnam: 15-year results and perspectives. Pediatr Transplant 2024; 28:e14441. [PMID: 37294691 DOI: 10.1111/petr.14441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 08/19/2022] [Accepted: 11/07/2022] [Indexed: 06/11/2023]
Abstract
BACKGROUND ND2 in Ho Chi Minh City is currently the only public center that performs PLT in Southern Vietnam. In 2005, the first PLT was successfully performed, with support from Belgian experts. This study reviews the implementation of PLT at our center and evaluates the results and challenges. METHODS Implementation of PLT at ND2 required medico-surgical team building and extensive improvement of hospital facilities. Records of 13 transplant recipients from 2005 to 2020 were studied retrospectively. Short- and long-term complications, as well as the survival rates, were reported. RESULTS The mean follow-up time was 8.3 ± 5.7 years. Surgical complications included one case of hepatic artery thrombosis that was successfully repaired, one case of colon perforation resulting in death from sepsis, and two cases of bile leak that were drained surgically. PTLD was observed in five patients, of whom three died. There were no cases of retransplantation. The 1-year, 5-year, and 10-year patient survival rates were 84.6%, 69.2%, and 69.2%, respectively. There were no cases of complication or death among the donors. CONCLUSION Living-donor PLT was developed at ND2 for providing a life-saving treatment to children with end-stage liver disease. Early surgical complication rate was low, and the patient survival rate was satisfactory at 1 year. Long-term survival decreased considerably due to PTLD. Future challenges include surgical autonomy and improvement of long-term medical follow-up with a particular emphasis on prevention and management of Epstein-Barr virus-related disease.
Collapse
Affiliation(s)
- Thanh Tri Tran
- Department of Hepato-Pancreato-Biliary Diseases and Liver Transplant, Children's Hospital 2, Ho Chi Minh City, Vietnam
| | - Phi Duy Ho
- Department of Hepato-Pancreato-Biliary Diseases and Liver Transplant, Children's Hospital 2, Ho Chi Minh City, Vietnam
| | - Nguyen An Thuan Luu
- Department of Hepato-Pancreato-Biliary Diseases and Liver Transplant, Children's Hospital 2, Ho Chi Minh City, Vietnam
| | - Thi Yen Nhi Truong
- Department of Hepato-Pancreato-Biliary Diseases and Liver Transplant, Children's Hospital 2, Ho Chi Minh City, Vietnam
| | - Hong Van Khanh Nguyen
- Department of Hepato-Pancreato-Biliary Diseases and Liver Transplant, Children's Hospital 2, Ho Chi Minh City, Vietnam
| | - Hai Trung Bui
- Department of Hepato-Pancreato-Biliary Diseases and Liver Transplant, Children's Hospital 2, Ho Chi Minh City, Vietnam
| | | | - Dong A Tran
- Children's Hospital 2, Ho Chi Minh City, Vietnam
| | - Thierry Pirotte
- Department of Anesthesiology, Cliniques Universitaires Saint-Luc, Brussels, Belgium
| | - Michael Gurevich
- Department of Surgery, Schneider's Children Hospital, Petah Tikva, Israel
| | - Raymond Reding
- Department of Abdominal Surgery and Transplantation, Cliniques Universitaires Saint-Luc, Brussels, Belgium
| |
Collapse
|
3
|
Do NTT, Vu TVD, Greer RC, Dittrich S, Vandendorpe M, Pham NT, Ta DN, Cao HT, Khuong TV, Le TBT, Duong TH, Nguyen TH, Cai NTH, Nguyen TQT, Trinh ST, van Doorn HR, Lubell Y, Lewycka S. Implementation of point-of-care testing of C-reactive protein concentrations to improve antibiotic targeting in respiratory illness in Vietnamese primary care: a pragmatic cluster-randomised controlled trial. Lancet Infect Dis 2023; 23:1085-1094. [PMID: 37230105 DOI: 10.1016/s1473-3099(23)00125-1] [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] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 02/24/2023] [Accepted: 02/28/2023] [Indexed: 05/27/2023]
Abstract
BACKGROUND In previous trials, point-of-care testing of C-reactive protein (CRP) concentrations safely reduced antibiotic use in non-severe acute respiratory infections in primary care. However, these trials were done in a research-oriented context with close support from research staff, which could have influenced prescribing practices. To better inform the potential for scaling up point-of-care testing of CRP in respiratory infections, we aimed to do a pragmatic trial of the intervention in a routine care setting. METHODS We did a pragmatic, cluster-randomised controlled trial at 48 commune health centres in Viet Nam between June 1, 2020, and May 12, 2021. Eligible centres served populations of more than 3000 people, handled 10-40 respiratory infections per week, had licensed prescribers on site, and maintained electronic patient databases. Centres were randomly allocated (1:1) to provide point-of-care CRP testing plus routine care or routine care only. Randomisation was stratified by district and by baseline prescription level (ie, the proportion of patients with suspected acute respiratory infections to whom antibiotics were prescribed in 2019). Eligible patients were aged 1-65 years and visiting the commune health centre for a suspected acute respiratory infection with at least one focal sign or symptom and symptoms lasting less than 7 days. The primary endpoint was the proportion of patients prescribed an antibiotic at first attendance in the intention-to-treat population. The per-protocol analysis included only people who underwent CRP testing. Secondary safety outcomes included time to resolution of symptoms and frequency of hospitalisation. This trial is registered with ClinicalTrials.gov, NCT03855215. FINDINGS 48 commune health centres were enrolled and randomly assigned, 24 to the intervention group (n=18 621 patients) and 24 to the control group (n=21 235). 17 345 (93·1%) patients in the intervention group were prescribed antibiotics, compared with 20 860 (98·2%) in the control group (adjusted relative risk 0·83 [95% CI 0·66-0·93]). Only 2606 (14%) of 18 621 patients in the intervention group underwent CRP testing and were included in the per-protocol analysis. When analyses were restricted to this population, larger reductions in prescribing were noted in the intervention group compared with the control group (adjusted relative risk 0·64 [95% CI 0·60-0·70]). Time to resolution of symptoms (hazard ratio 0·70 [95% CI 0·39-1·27]) and frequency of hospitalisation (nine in the intervention group vs 17 in the control group; adjusted relative risk 0·52 [95% CI 0·23-1·17]) did not differ between groups. INTERPRETATION Use of point-of-care CRP testing efficaciously reduced prescription of antibiotics in patients with non-severe acute respiratory infections in primary health care in Viet Nam without compromising patient recovery. The low uptake of CRP testing suggests that barriers to implementation and compliance need to be addressed before scale-up of the intervention. FUNDING Australian Government, UK Government, and the Foundation for Innovative New Diagnostics.
Collapse
Affiliation(s)
| | | | - Rachel C Greer
- Mahidol Oxford Tropical Medicine Research Unit, Bangkok, Thailand; Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK
| | - Sabine Dittrich
- Foundation for Innovative New Diagnostics, Geneva, Switzerland; Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK
| | | | | | - Dieu Ngan Ta
- National Hospital for Tropical Diseases, Hanoi, Viet Nam
| | | | | | | | | | | | | | | | - Son Tung Trinh
- Oxford University Clinical Research Unit, Hanoi, Viet Nam
| | - H Rogier van Doorn
- Oxford University Clinical Research Unit, Hanoi, Viet Nam; Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK
| | - Yoel Lubell
- Mahidol Oxford Tropical Medicine Research Unit, Bangkok, Thailand; Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK
| | - Sonia Lewycka
- Oxford University Clinical Research Unit, Hanoi, Viet Nam; Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK.
| |
Collapse
|
4
|
Nguyen QT, Huynh Thi KL, Nguyen MP, Trinh T, Pham NT, Ho MN, Tran Thi YN, Tran NQ, Le Thi P. A comparative study on essential oils from the leaves and stems of Vietnamese Mikania micrantha Kunth. Nat Prod Res 2023:1-7. [PMID: 37635675 DOI: 10.1080/14786419.2023.2251168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 05/12/2023] [Revised: 07/30/2023] [Accepted: 08/17/2023] [Indexed: 08/29/2023]
Abstract
Mikania micrantha Kunth is widely known as potential herbal medicine, although it is an invasive alien species in Southeast Asia. In this study, the essential oils from leaves and stems of M. micrantha were extracted by hydrodistillation method, and the chemical profiles of essential oils were then analysed by gas chromatography (GC) and gas chromatography coupled with mass spectrometry (GC/MS). It was found that there were similarities and differences in chemical compositions and their percentage between the essential oils obtained from these two parts. The dominant components of leaves essential oil are β-Cubebene, Germacrene D, and α-Zingiberene, accounting for 11.34%, 10.96%, and 10.76%, respectively. Additionally, the major components of stems essential oils are D-Limonene (16.99%), β-Pinene (7.91%), and α-Zingiberene (7.26%). The research sheds fresh light on the chemical makeup of M. micrantha essential oils, emphasising their potential for the future.
Collapse
Affiliation(s)
- Quoc Trung Nguyen
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam
- Vietnam National University, Ho Chi Minh City, Vietnam
| | - Khanh Ly Huynh Thi
- Vietnam National University, Ho Chi Minh City, Vietnam
- School of Biotechnology, International University, Ho Chi Minh City, Vietnam
| | - Minh Phuc Nguyen
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam
- Vietnam National University, Ho Chi Minh City, Vietnam
| | - Thien Trinh
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam
- Vietnam National University, Ho Chi Minh City, Vietnam
| | - Ngoc Thach Pham
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam
- Vietnam National University, Ho Chi Minh City, Vietnam
| | - Minh Nhut Ho
- Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russia
| | - Yen Nhi Tran Thi
- Institute of Technology Application and Sustainable Development, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam
| | - Ngoc Quyen Tran
- Institute of Applied Materials Science, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - Phuong Le Thi
- Institute of Applied Materials Science, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| |
Collapse
|
5
|
Mo Y, Ding Y, Cao Y, Hopkins J, Ashley EA, Waithira N, Wannapinij P, Lee SJ, Ling CL, Hamers RL, Roberts T, Lubell Y, Karkey A, Akech S, Lissauer S, Opintan J, Okeke I, Eremin S, Tornimbene B, Hsu LY, Thwaites L, Lam MY, Pham NT, Pham TK, Teo J, Kwa ALH, Marimuthu K, Ng OT, Vasoo S, Kitsaran S, Anunnatsiri S, Kosalaraksa P, Chotiprasitsakul D, Santanirand P, Plongla R, Chua HH, Tiong XT, Wong KJ, Ponnampalavanar SSLS, Sulaiman HB, Mazlan MZ, Salmuna ZN, Rajahram GS, Zaili MZBM, Francis JR, Sarmento N, Guterres H, Oakley T, Yan J, Tilman A, Khalid MOR, Hashmi M, Mahmood SF, Dhiloo AK, Fatima A, Lubis IND, Wijaya H, Abad CL, Roman AD, Lazarte CCM, Mamun GMS, Asli R, Momin MHFBHA, Nyamdavaa K, Gurjav U, Bory S, Varghese GM, Gupta L, Tantia P, Sinto R, Doi Y, Khanal B, Malijan G, Lazaro J, Gunasekara S, Withanage S, Liu PY, Xiao Y, Wang M, Paterson DL, van Doorn HR, Turner P. ACORN (A Clinically-Oriented Antimicrobial Resistance Surveillance Network) II: protocol for case based antimicrobial resistance surveillance. Wellcome Open Res 2023; 8:179. [PMID: 37854055 PMCID: PMC10579854 DOI: 10.12688/wellcomeopenres.19210.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/22/2023] [Indexed: 10/20/2023] Open
Abstract
Background: Antimicrobial resistance surveillance is essential for empiric antibiotic prescribing, infection prevention and control policies and to drive novel antibiotic discovery. However, most existing surveillance systems are isolate-based without supporting patient-based clinical data, and not widely implemented especially in low- and middle-income countries (LMICs). Methods: A Clinically-Oriented Antimicrobial Resistance Surveillance Network (ACORN) II is a large-scale multicentre protocol which builds on the WHO Global Antimicrobial Resistance and Use Surveillance System to estimate syndromic and pathogen outcomes along with associated health economic costs. ACORN-healthcare associated infection (ACORN-HAI) is an extension study which focuses on healthcare-associated bloodstream infections and ventilator-associated pneumonia. Our main aim is to implement an efficient clinically-oriented antimicrobial resistance surveillance system, which can be incorporated as part of routine workflow in hospitals in LMICs. These surveillance systems include hospitalised patients of any age with clinically compatible acute community-acquired or healthcare-associated bacterial infection syndromes, and who were prescribed parenteral antibiotics. Diagnostic stewardship activities will be implemented to optimise microbiology culture specimen collection practices. Basic patient characteristics, clinician diagnosis, empiric treatment, infection severity and risk factors for HAI are recorded on enrolment and during 28-day follow-up. An R Shiny application can be used offline and online for merging clinical and microbiology data, and generating collated reports to inform local antibiotic stewardship and infection control policies. Discussion: ACORN II is a comprehensive antimicrobial resistance surveillance activity which advocates pragmatic implementation and prioritises improving local diagnostic and antibiotic prescribing practices through patient-centred data collection. These data can be rapidly communicated to local physicians and infection prevention and control teams. Relative ease of data collection promotes sustainability and maximises participation and scalability. With ACORN-HAI as an example, ACORN II has the capacity to accommodate extensions to investigate further specific questions of interest.
Collapse
Affiliation(s)
- Yin Mo
- ADVANCE-ID, Saw Swee Hock School Of Public Health, National University of Singapore, Singapore, 117549, Singapore
- Division of Infectious Diseases, National University Hospital, Singapore, Singapore, 119074, Singapore
- Department of Medicine, National University of Singapore, Singapore, 119228, Singapore
- Centre for Tropical Medicine and Global Health, University of Oxford, Oxford, UK
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Salaya, Nakhon Pathom, 10400, Thailand
| | - Ying Ding
- ADVANCE-ID, Saw Swee Hock School Of Public Health, National University of Singapore, Singapore, 117549, Singapore
| | - Yang Cao
- Singapore Clinical Research Institute, Singapore, 139234, Singapore
| | - Jill Hopkins
- Centre for Tropical Medicine and Global Health, University of Oxford, Oxford, UK
- Cambodia Oxford Medical Research Unit, Angkor Hospital for Children, Siem Reap, 171020, Cambodia
| | - Elizabeth A. Ashley
- Centre for Tropical Medicine and Global Health, University of Oxford, Oxford, UK
- Lao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit, Microbiology Laboratory, Mahosot Hospital, Vientiane, Lao People's Democratic Republic
| | - Naomi Waithira
- Centre for Tropical Medicine and Global Health, University of Oxford, Oxford, UK
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Salaya, Nakhon Pathom, 10400, Thailand
| | - Prapass Wannapinij
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Salaya, Nakhon Pathom, 10400, Thailand
| | - Sue J. Lee
- Centre for Tropical Medicine and Global Health, University of Oxford, Oxford, UK
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Salaya, Nakhon Pathom, 10400, Thailand
| | - Claire L. Ling
- Centre for Tropical Medicine and Global Health, University of Oxford, Oxford, UK
- Cambodia Oxford Medical Research Unit, Angkor Hospital for Children, Siem Reap, 171020, Cambodia
| | - Raph L. Hamers
- Centre for Tropical Medicine and Global Health, University of Oxford, Oxford, UK
- Oxford University Clinical Research Unit (OUCRU) Indonesia, Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia
| | - Tamalee Roberts
- Centre for Tropical Medicine and Global Health, University of Oxford, Oxford, UK
- Lao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit, Microbiology Laboratory, Mahosot Hospital, Vientiane, Lao People's Democratic Republic
| | - Yoel Lubell
- Centre for Tropical Medicine and Global Health, University of Oxford, Oxford, UK
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Salaya, Nakhon Pathom, 10400, Thailand
| | - Abhilasha Karkey
- Centre for Tropical Medicine and Global Health, University of Oxford, Oxford, UK
- Oxford University Clinical Research Unit (OUCRU) Indonesia, Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia
| | - Samuel Akech
- Kenya Medical Research Institute, Nairobi, Kenya
| | - Samantha Lissauer
- Liverpool School of Tropical Medicine (LSTM), University of Liverpool, Liverpool, England, UK
- Malawi-Liverpool-Wellcome Trust (MLW) Clinical Research Programme, Blantyre, Malawi
| | | | | | | | | | - Li Yang Hsu
- ADVANCE-ID, Saw Swee Hock School Of Public Health, National University of Singapore, Singapore, 117549, Singapore
| | - Louise Thwaites
- Centre for Tropical Medicine and Global Health, University of Oxford, Oxford, UK
- Oxford University Clinical Research Unit, Hospital for Tropical Diseases, Ho Chi Minh City, Vietnam
| | - Minh Yen Lam
- Oxford University Clinical Research Unit, Hospital for Tropical Diseases, Ho Chi Minh City, Vietnam
| | | | - Tieu Kieu Pham
- Oxford University Clinical Research Unit, Hospital for Tropical Diseases, Ho Chi Minh City, Vietnam
| | - Jeanette Teo
- Department of laboratory Medicine, University Medicine Cluster, National University Hospital, Singapore, Singapore
| | - Andrea Lay-Hoon Kwa
- Pharmacy (Research), Singapore General Hospital, Singapore, Singapore
- Emerging Infectious Diseases Programme, Duke-National University of Singapore Medical School, Singapore, Singapore
| | - Kalisvar Marimuthu
- National Centre for Infectious Diseases, Singapore, Singapore
- Department of Infectious Disease, Tan Tock Seng Hospital, Singapore, Singapore
| | - Oon Tek Ng
- National Centre for Infectious Diseases, Singapore, Singapore
- Department of Infectious Disease, Tan Tock Seng Hospital, Singapore, Singapore
| | - Shawn Vasoo
- National Centre for Infectious Diseases, Singapore, Singapore
- Department of Infectious Disease, Tan Tock Seng Hospital, Singapore, Singapore
| | | | - Siriluck Anunnatsiri
- Department of Medicine, Faculty of Medicine, Khon Kaen University, Nai Mueang, Khon Kaen, Thailand
| | - Pope Kosalaraksa
- Department of Pediatrics, Faculty of Medicine, Khon Kaen University, Nai Mueang, Khon Kaen, Thailand
| | | | | | - Rongpong Plongla
- King Chulalongkorn Memorial Hospital, Chulalongkorn University, Bangkok, Thailand
| | | | | | - Ke Juin Wong
- Sabah Women and Children's Hospital, Kota Kinabalu, Malaysia
| | | | | | - Mohd Zulfakar Mazlan
- Department of Anesthesiology and Intensive Care, School of Medical Sciences, Universiti Sains Malaysia, Kelantan, Malaysia
| | - Zeti Norfidiyati Salmuna
- Department of Microbiology and Parasitology, School of Medical Sciences, Universiti Sains Malaysia, Kelantan, Malaysia
| | | | | | - Joshua R. Francis
- Menzies school of health research, Charles Darwin University, Dili, Timor-Leste
| | - Nevio Sarmento
- Menzies school of health research, Charles Darwin University, Dili, Timor-Leste
- Laboratorio Nacional da Saude, Ministerio da Saude, Dili, Timor-Leste
| | | | - Tessa Oakley
- Menzies school of health research, Charles Darwin University, Dili, Timor-Leste
| | - Jennifer Yan
- Menzies school of health research, Charles Darwin University, Dili, Timor-Leste
| | - Ari Tilman
- Laboratorio Nacional da Saude, Ministerio da Saude, Dili, Timor-Leste
| | | | - Madiha Hashmi
- Dr. Ziauddin Hospital Clifton Campus, Karachi, Pakistan
| | | | | | | | - Inke Nadia D. Lubis
- Faculty of Medicine, Universitas Sumatera Utara, Medan, North Sumatra, Indonesia
| | - Hendri Wijaya
- Faculty of Medicine, Universitas Sumatera Utara, Medan, North Sumatra, Indonesia
- General Hospital H. Adam Malik, Medan, Indonesia
| | | | | | - Cecilia C. Maramba Lazarte
- Philippine General Hospital, Manila, Philippines
- University of the Philippines Manila, Manila, Metro Manila, Philippines
| | | | - Rosmonaliza Asli
- Raja Isteri Pengiran Anak Saleha Hospital, Bandar Seri Begawan, Brunei-Muara District, Brunei
| | | | | | - Ulziijargal Gurjav
- Mongolian National University of Medical Sciences, Ulaanbaatar, Mongolia
| | | | | | - Lalit Gupta
- Maulana Azad Medical College and Lok Nayak Hospital, New Delhi, India
| | - Pratik Tantia
- Ananta Institute of Medical Sciences and Research Center, Siyol, India
| | - Robert Sinto
- Cipto Mangunkusumo National Hospital, Faculty of Medicine, Universitas Indonesia, Depok, West Java, Indonesia
| | - Yohei Doi
- Fujita Health University Hospital, Toyoake, Japan
| | - Basudha Khanal
- B.P. Koirala Institute of Health Sciences, Dharan, Nepal
| | - Greco Malijan
- San Lazaro Hospital, Nagasaki University Collaborative Research Office, Manila, Philippines
| | - Jezreel Lazaro
- Hospital Infection Control Unit, San Lazaro Hospital, Manila, Philippines
| | | | | | - Po Yu Liu
- Taichung Veteran General Hospital, Taichung City, Vietnam
| | - Yonghong Xiao
- The First Affiliated Hospital Of Zhejiang University School Of Medicine, Hangzhou, China
| | - Minggui Wang
- Huashan Hospital, Fudan University, Shanghai, China
| | - David L. Paterson
- ADVANCE-ID, Saw Swee Hock School Of Public Health, National University of Singapore, Singapore, 117549, Singapore
- Department of Medicine, National University of Singapore, Singapore, 119228, Singapore
| | - H. Rogier van Doorn
- Centre for Tropical Medicine and Global Health, University of Oxford, Oxford, UK
| | - Paul Turner
- Centre for Tropical Medicine and Global Health, University of Oxford, Oxford, UK
- Cambodia Oxford Medical Research Unit, Angkor Hospital for Children, Siem Reap, 171020, Cambodia
| |
Collapse
|
6
|
Nguyen-Ha BN, Pham NT, Claes P, Lievens P, Fielicke A, Ngan VT, Nguyen MT, Janssens E. Small chromium-doped silicon clusters CrSi n: structures, IR spectra, charge effect, magnetism and chirality. Phys Chem Chem Phys 2023. [PMID: 37223926 DOI: 10.1039/d3cp00317e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
A series of small chromium-doped silicon clusters CrSin with n = 3-10 in the cationic, neutral and anionic charge states were investigated using quantum chemical methods. The CrSin+ cations with n = 6-10 were produced in the gas phase and characterized by far-IR multiple photon dissociation (IR-MPD) spectroscopy. Good agreement between experimental spectra in the 200-600 cm-1 frequency range and those determined for the lowest-energy isomers by density functional theory calculations (B3P86/6-311+G(d)) provide a strong support for the geometrical assignments. An extensive structural comparison for the three different charge states shows that the structural growth mechanism inherently depends on the charge. While the structures of the cationic clusters are preferentially formed by addition of the Cr dopant to the corresponding pure silicon cluster, it favors substitution in both the neutral and anionic counterparts. The Si-Cr bonds of the studied CrSin+/0/- clusters are polar covalent. Apart from a basket-like Cr@Si9- and an endohedral Cr@Si10- cage, the Cr dopant takes an exohedral position and bears a large positive charge in the clusters. The exohedrally doped clusters also have a high spin density on Cr, manifesting the fact that the intrinsic magnetic moment of the transition metal dopant is well conserved. Three CrSin clusters have a pair of enantiomeric isomers in their ground state, namely the cationic n = 9 and the neutral and anionic n = 7. Those can be distinguished from each other by their electronic circular dichroism spectra, calculated using time-dependent density functional theory. Those enantiomers, being intrinsically chiral inorganic compounds, might be used as building blocks of optical-magnetic nanomaterials because of their high magnetic moments and ability to rotate the plane of polarization.
Collapse
Affiliation(s)
- Bao-Ngan Nguyen-Ha
- Laboratory for Chemical Computation and Modeling, Institute for Computational Science and Artificial Intelligence, Van Lang University, Ho Chi Minh City, Vietnam.
- Faculty of Applied Technology, School of Technology, Van Lang University, Ho Chi Minh City, Vietnam
| | - Ngoc Thach Pham
- Laboratory of Computational Chemistry and Modeling (LCCM), Department of Chemistry, Faculty of Natural Sciences, Quy Nhon University, Quy Nhon, Vietnam
| | - Pieterjan Claes
- Quantum Solid State Physics, KU Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium.
| | - Peter Lievens
- Quantum Solid State Physics, KU Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium.
| | - André Fielicke
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - Vu Thi Ngan
- Laboratory of Computational Chemistry and Modeling (LCCM), Department of Chemistry, Faculty of Natural Sciences, Quy Nhon University, Quy Nhon, Vietnam
| | - Minh Tho Nguyen
- Laboratory for Chemical Computation and Modeling, Institute for Computational Science and Artificial Intelligence, Van Lang University, Ho Chi Minh City, Vietnam.
- Faculty of Applied Technology, School of Technology, Van Lang University, Ho Chi Minh City, Vietnam
| | - Ewald Janssens
- Quantum Solid State Physics, KU Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium.
| |
Collapse
|
7
|
Van PD, Mai NTA, Nguyen VT, Nguyen TTH, Van Dong H, Le PN, Lai TNH, Thi PN, Pham NT, Nguyen LT, Anh DBT, Le VP. Detection and genetic characterization of canine distemper virus isolated in civets in Vietnam. Res Vet Sci 2023; 154:97-101. [PMID: 36521201 DOI: 10.1016/j.rvsc.2022.12.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 11/03/2022] [Revised: 11/22/2022] [Accepted: 12/06/2022] [Indexed: 12/14/2022]
Abstract
Canine distemper (CD), caused by the canine distemper virus (CDV), is a lethal systemic disease to a wide range of wild and domestic carnivorous hosts, including civets. In this study, a possible CD outbreak in a backyard farm with 32 diseased civets (Viverricula indica) in Hanoi, Vietnam, was investigated. The sick civets showed CD-like clinical signs such as anorexia, sedentary behavior, diarrhea, dermatitis, nasal, and footpad hyperkeratosis. Various tissue samples collected from the dead civets were utilized for molecular screening of CDV and histopathological examination. The genetic detection and characterization confirmed that samples collected from dead civets tested positive for CDV. The phylogenetic analysis based on the full-length H gene sequences indicated that all CDV strains isolated from civets belonged to the Asia-1 lineage and were closely related to the CDV strains previously reported from dogs in Thailand, China, and Vietnam. Histopathological examination showed severe interstitial pneumonia, hemorrhagic alveolar septa, necrotic alveolar epithelial cells, necrotic, degenerated, or lost Purkinje cells, eosinophilic intracytoplasmic inclusion bodies, edema, and perivascular cuff. This study confirmed the detection of CDV in civets for the first time in Vietnam.
Collapse
Affiliation(s)
- Phai Dam Van
- Faculty of Veterinary Medicine, Vietnam National University of Agriculture, Trau Quy Town, Gia Lam District, Hanoi 131000, Viet Nam
| | | | - Van Tam Nguyen
- Institute of Veterinary Science and Technology (IVST), Hanoi, Viet Nam
| | | | - Hieu Van Dong
- Faculty of Veterinary Medicine, Vietnam National University of Agriculture, Trau Quy Town, Gia Lam District, Hanoi 131000, Viet Nam
| | - Phuong Nam Le
- Institute of Veterinary Science and Technology (IVST), Hanoi, Viet Nam
| | - Thi Ngoc Ha Lai
- Institute of Veterinary Science and Technology (IVST), Hanoi, Viet Nam
| | - Phuong Nguyen Thi
- Faculty of Veterinary Medicine, Vietnam National University of Agriculture, Trau Quy Town, Gia Lam District, Hanoi 131000, Viet Nam
| | - Ngoc Thach Pham
- Institute of Veterinary Science and Technology (IVST), Hanoi, Viet Nam
| | - Lan Thi Nguyen
- Faculty of Veterinary Medicine, Vietnam National University of Agriculture, Trau Quy Town, Gia Lam District, Hanoi 131000, Viet Nam
| | - Dao Bui Tran Anh
- Faculty of Veterinary Medicine, Vietnam National University of Agriculture, Trau Quy Town, Gia Lam District, Hanoi 131000, Viet Nam
| | - Van Phan Le
- Faculty of Veterinary Medicine, Vietnam National University of Agriculture, Trau Quy Town, Gia Lam District, Hanoi 131000, Viet Nam; Institute of Veterinary Science and Technology (IVST), Hanoi, Viet Nam.
| |
Collapse
|
8
|
van Doorn HR, Miliya T, Douangnouvong A, Ta Thi Dieu N, Soputhy C, Lem M, Chommanam D, Keoluangkhot V, Soumphonphakdy B, Rassavong K, Thanadabouth K, Sayarath M, Chansamouth V, Vu MD, Dong PK, Dang VD, Tran VB, Do TKY, Ninh TN, Nguyen HL, Kim NH, Prak S, Vongsouvath M, Van DT, Nguyen TKT, Nguyen HK, Hamers RL, Ling C, Roberts T, Waithira N, Wannapinij P, Vu TVD, Celhay O, Ngoun C, Vongphachanh S, Pham NT, Ashley EA, Turner P. A Clinically Oriented antimicrobial Resistance surveillance Network (ACORN): pilot implementation in three countries in Southeast Asia, 2019-2020. Wellcome Open Res 2022; 7:309. [PMID: 37854668 PMCID: PMC10579863 DOI: 10.12688/wellcomeopenres.18317.1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/12/2022] [Indexed: 10/20/2023] Open
Abstract
Background: Case-based surveillance of antimicrobial resistance (AMR) provides more actionable data than isolate- or sample-based surveillance. We developed A Clinically Oriented antimicrobial Resistance surveillance Network (ACORN) as a lightweight but comprehensive platform, in which we combine clinical data collection with diagnostic stewardship, microbiological data collection and visualisation of the linked clinical-microbiology dataset. Data are compatible with WHO GLASS surveillance and can be stratified by syndrome and other metadata. Summary metrics can be visualised and fed back directly for clinical decision-making and to inform local treatment guidelines and national policy. Methods: An ACORN pilot was implemented in three hospitals in Southeast Asia (1 paediatric, 2 general) to collect clinical and microbiological data from patients with community- or hospital-acquired pneumonia, sepsis, or meningitis. The implementation package included tools to capture site and laboratory capacity information, guidelines on diagnostic stewardship, and a web-based data visualisation and analysis platform. Results: Between December 2019 and October 2020, 2294 patients were enrolled with 2464 discrete infection episodes (1786 community-acquired, 518 healthcare-associated and 160 hospital-acquired). Overall, 28-day mortality was 8.7%. Third generation cephalosporin resistance was identified in 54.2% (39/72) of E. coli and 38.7% (12/31) of K. pneumoniae isolates . Almost a quarter of S. aureus isolates were methicillin resistant (23.0%, 14/61). 290/2464 episodes could be linked to a pathogen, highlighting the level of enrolment required to achieve an acceptable volume of isolate data. However, the combination with clinical metadata allowed for more nuanced interpretation and immediate feedback of results. Conclusions: ACORN was technically feasible to implement and acceptable at site level. With minor changes from lessons learned during the pilot ACORN is now being scaled up and implemented in 15 hospitals in 9 low- and middle-income countries to generate sufficient case-based data to determine incidence, outcomes, and susceptibility of target pathogens among patients with infectious syndromes.
Collapse
Affiliation(s)
- H. Rogier van Doorn
- Centre for Tropical Medicine and Global Health, Nuffield Department of Clinical Medicine, Univeristy of Oxford, Oxford, OX3 7LG, UK
- Oxford University Clinical Research Unit, Hanoi, Vietnam
| | - Thyl Miliya
- University of Oxford, Siem Reap, 171202, Cambodia
| | | | | | | | - Meymey Lem
- University of Oxford, Siem Reap, 171202, Cambodia
| | - Danoy Chommanam
- Laos Oxford Mahosot Wellcome Research Unit, Vientiane, Lao People's Democratic Republic
| | | | | | | | | | | | - Vilada Chansamouth
- Laos Oxford Mahosot Wellcome Research Unit, Vientiane, Lao People's Democratic Republic
- Mahosot Hospital, Vientiane, Lao People's Democratic Republic
| | - Minh Dien Vu
- National Hospital for Tropical Diseases, Hanoi, Vietnam
| | | | | | - Van Bac Tran
- National Hospital for Tropical Diseases, Hanoi, Vietnam
| | | | - Thi Ngoc Ninh
- National Hospital for Tropical Diseases, Hanoi, Vietnam
| | | | - Ngoc Hao Kim
- National Hospital for Tropical Diseases, Hanoi, Vietnam
| | - Sothea Prak
- University of Oxford, Siem Reap, 171202, Cambodia
| | - Manivanh Vongsouvath
- Laos Oxford Mahosot Wellcome Research Unit, Vientiane, Lao People's Democratic Republic
- Mahosot Hospital, Vientiane, Lao People's Democratic Republic
| | | | | | | | - Raph L. Hamers
- Centre for Tropical Medicine and Global Health, Nuffield Department of Clinical Medicine, Univeristy of Oxford, Oxford, OX3 7LG, UK
- Oxford University Clinical Research Unit - Indonesia, Jakarta, Indonesia
| | - Clare Ling
- Centre for Tropical Medicine and Global Health, Nuffield Department of Clinical Medicine, Univeristy of Oxford, Oxford, OX3 7LG, UK
- Shoklo Malaria Research Unit, Mae Sot, 63110, Thailand
| | - Tamalee Roberts
- Laos Oxford Mahosot Wellcome Research Unit, Vientiane, Lao People's Democratic Republic
| | - Naomi Waithira
- Centre for Tropical Medicine and Global Health, Nuffield Department of Clinical Medicine, Univeristy of Oxford, Oxford, OX3 7LG, UK
- Mahidol-Oxford Tropical Medicine Research Unit, Bangkok, 10400, Thailand
| | - Prapass Wannapinij
- Mahidol-Oxford Tropical Medicine Research Unit, Bangkok, 10400, Thailand
| | | | - Olivier Celhay
- Mahidol-Oxford Tropical Medicine Research Unit, Bangkok, 10400, Thailand
| | | | | | | | - Elizabeth A. Ashley
- Centre for Tropical Medicine and Global Health, Nuffield Department of Clinical Medicine, Univeristy of Oxford, Oxford, OX3 7LG, UK
- Laos Oxford Mahosot Wellcome Research Unit, Vientiane, Lao People's Democratic Republic
| | - Paul Turner
- Centre for Tropical Medicine and Global Health, Nuffield Department of Clinical Medicine, Univeristy of Oxford, Oxford, OX3 7LG, UK
- University of Oxford, Siem Reap, 171202, Cambodia
| |
Collapse
|
9
|
Trinh TBN, Nguyen VT, Nguyen TTH, Mai NTA, Le PN, Lai TNH, Phan TH, Tran DH, Pham NT, Dam VP, Nguyen TL, Ambagala A, Babiuk S, Le VP. Molecular and histopathological characterization of lumpy skin disease in cattle in northern Vietnam during the 2020-2021 outbreaks. Arch Virol 2022; 167:2143-2149. [PMID: 35831756 DOI: 10.1007/s00705-022-05533-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Accepted: 06/01/2022] [Indexed: 12/24/2022]
Abstract
Lumpy skin disease (LSD) is a serious emerging infectious disease in cattle caused by a virus of the family Poxviridae. According to the Department of Animal Health, LSD first occurred in Vietnam at the end of October 2020 in Cao Bang and Lang Son provinces. So far, the disease has infected over 63,000 animals, resulting in 9170 deaths occurring in 32 different provinces in northern and central Vietnam. In this study, skin samples from lumpy skin disease virus (LSDV)-infected cattle from the northern provinces of Vietnam displaying clinical symptoms including fever (> 40 °C), runny nose, drooling, and skin lesions were used for genetic characterization and histopathology. Genetic analysis of the partial P32 (LSDV074), partial F (LSDV117), complete RPO30 (LSDV035), and complete G-protein-coupled-chemokine-like receptor (GPCR) (LSDV011) genes showed that all Vietnamese LSDV strains belonged to the genus Capripoxvirus and were closely related to LSDV strains isolated in China. Microscopic examination of the skin lesions showed thickening of the epidermal layer of the skin and hair follicles, hyperplasia of sebaceous glands, intracytoplasmic inclusion bodies, and hemorrhages in the mesoderm.
Collapse
Affiliation(s)
| | - Van Tam Nguyen
- Research Centre for Plant and Animal Health, Hanoi, Vietnam
| | | | - Nguyen Tuan Anh Mai
- College of Veterinary Medicine, Vietnam National University of Agriculture, Hanoi, Vietnam
| | - Phuong Nam Le
- College of Veterinary Medicine, Vietnam National University of Agriculture, Hanoi, Vietnam
| | - Thi Ngoc Ha Lai
- College of Veterinary Medicine, Vietnam National University of Agriculture, Hanoi, Vietnam
| | - Thanh Huong Phan
- College of Veterinary Medicine, Vietnam National University of Agriculture, Hanoi, Vietnam
| | - Duc Hoan Tran
- Bac Giang Agriculture and Forestry University, Bac Giang, Vietnam
| | | | - Van Phai Dam
- College of Veterinary Medicine, Vietnam National University of Agriculture, Hanoi, Vietnam
| | - Thi Lan Nguyen
- College of Veterinary Medicine, Vietnam National University of Agriculture, Hanoi, Vietnam
| | - Aruna Ambagala
- National Centre for Foreign Animal Disease, Canadian Food Inspection Agency, Winnipeg, MB, Canada
| | - Shawn Babiuk
- National Centre for Foreign Animal Disease, Canadian Food Inspection Agency, Winnipeg, MB, Canada
| | - Van Phan Le
- College of Veterinary Medicine, Vietnam National University of Agriculture, Hanoi, Vietnam.
- Vietnam National University of Agriculture, Hanoi, Vietnam.
| |
Collapse
|
10
|
Nguyen VT, Nguyen QT, Pham NT, Nguyen DT, Pham TN, Tran NQ. An in vitro investigation into targeted paclitaxel delivery nanomaterials based on chitosan-Pluronic P123-biotin copolymer for inhibiting human breast cancer cells. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2021.102807] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
|
11
|
Vu TVD, Choisy M, Do TTN, Nguyen VMH, Campbell JI, Le TH, Nguyen VT, Wertheim HFL, Pham NT, Nguyen VK, van Doorn HR. Antimicrobial susceptibility testing results from 13 hospitals in Viet Nam: VINARES 2016-2017. Antimicrob Resist Infect Control 2021; 10:78. [PMID: 33971969 PMCID: PMC8112055 DOI: 10.1186/s13756-021-00937-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Accepted: 04/21/2021] [Indexed: 11/25/2022] Open
Abstract
OBJECTIVE To analyse data from 2016-17 from a hospital-based antimicrobial resistance surveillance with national coverage in a network of hospitals Viet Nam. METHODS We analysed data from 13 hospitals, 3 less than the dataset from the 2012-13 period. Identification and antimicrobial susceptibility testing data from the clinical microbiology laboratories from samples sent in for routine diagnostics were used. Clinical and Laboratory Standards Institute 2018 guidelines were used for antimicrobial susceptibility testing interpretation. WHONET was used for data entry, management and analysis. RESULTS 42,553 deduplicated isolates were included in this analysis; including 30,222 (71%) Gram-negative and 12,331 (29%) Gram-positive bacteria. 8,793 (21%) were from ICUs and 7,439 (18%) isolates were from invasive infections. Escherichia coli and Staphylococcus aureus were the most frequently detected species with 9,092 (21%) and 4,833 isolates (11%), respectively; followed by Klebsiella pneumoniae (3,858 isolates - 9.1%) and Acinetobacter baumannii (3,870 isolates - 9%). Bacteria were mainly isolated from sputum (8,798 isolates - 21%), blood (7,118 isolates - 17%) and urine (5,202 isolates - 12%). Among Gram-positives 3,302/4,515 isolates (73%) of S. aureus were MRSA; 99/290 (34%) of Enterococcus faecium were resistant to vancomycin; and 58% (663/1,136) of Streptococcus pneumoniae proportion were reduced susceptible to penicillin. Among Gram-negatives 59% (4,085/6,953) and 40% (1,186/2,958) of E. coli and K. pneumoniae produced ESBL and 29% (376/1,298) and 11% (961/8,830) were resistant to carbapenems, respectively. 79% (2855/3622) and 45% (1,514/3,376) of Acinetobacter spp. and Pseudomonas aeruginosa were carbapenem resistant, respectively. 88% (804/911) of Haemophilus influenzae were ampicillin resistant and 18/253 (7%) of Salmonella spp. and 7/46 (15%) of Shigella spp. were resistant to fluoroquinolones. The number of isolates from which data were submitted in the 2016-2017 period was twice as high as in 2012-2013. AMR proportions were higher in 2016-2017 for most pathogen-antimicrobial combinations of interest including imipenem-resistant A. baumannii, P. aeruginosa and Enterobacterales. CONCLUSIONS The data show alarmingly high and increasing resistant proportions among important organisms in Viet Nam. AMR proportions varied across hospital types and should be interpreted with caution because existing sampling bias and missing information on whether isolates were community or hospital acquired. Affordable and scalable ways to adopt a sample- or case-based approach across the network should be explored and clinical data should be integrated to help provide more accurate inferences of the surveillance data.
Collapse
Affiliation(s)
- Tien Viet Dung Vu
- Oxford University Clinical Research Unit, National Hospital for Tropical Diseases, 78 Giai Phong, Dong Da, Hanoi, Viet Nam.
| | - Marc Choisy
- Oxford University Clinical Research Unit, National Hospital for Tropical Diseases, 78 Giai Phong, Dong Da, Hanoi, Viet Nam
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - Thi Thuy Nga Do
- Oxford University Clinical Research Unit, National Hospital for Tropical Diseases, 78 Giai Phong, Dong Da, Hanoi, Viet Nam
| | - Van Minh Hoang Nguyen
- Oxford University Clinical Research Unit, National Hospital for Tropical Diseases, 78 Giai Phong, Dong Da, Hanoi, Viet Nam
| | - James I Campbell
- Oxford University Clinical Research Unit, National Hospital for Tropical Diseases, 78 Giai Phong, Dong Da, Hanoi, Viet Nam
| | - Thi Hoi Le
- National Hospital for Tropical Diseases, Hanoi, Viet Nam
| | | | - Heiman F L Wertheim
- Oxford University Clinical Research Unit, National Hospital for Tropical Diseases, 78 Giai Phong, Dong Da, Hanoi, Viet Nam
- Department of Medical Microbiology, Radboudumc Center for Infectious Diseases, Radboudumc, Nijmegen, Netherlands
| | | | | | - H Rogier van Doorn
- Oxford University Clinical Research Unit, National Hospital for Tropical Diseases, 78 Giai Phong, Dong Da, Hanoi, Viet Nam
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
| |
Collapse
|
12
|
Do AD, Pham MT, Dinh TH, Ngo TC, Luu QD, Pham NT, Ha DL, Vuong HN. Evaluation of lecturers’ performance using a novel hierarchical multi-criteria model based on an interval complex Neutrosophic set. 10 5267/j dsl 2020. [DOI: 10.5267/j.dsl.2020.1.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
13
|
Le VP, Song S, An BH, Park GN, Pham NT, Le DQ, Nguyen VT, Vu TTH, Kim KS, Choe S, An DJ. A novel strain of porcine deltacoronavirus in Vietnam. Arch Virol 2017; 163:203-207. [PMID: 29022111 PMCID: PMC7087264 DOI: 10.1007/s00705-017-3594-8] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2017] [Accepted: 08/20/2017] [Indexed: 11/29/2022]
Abstract
Two porcine deltacoronavirus (PDCoV) strains (Binh21 and HaNoi6) were isolated from two pig farms in North Vietnam. Phylogenetic analysis of the complete genomes and the Spike and Membrane genes revealed that the two Vietnam PDCoVs belong to the same lineage as PDCoVs from Thailand and Laos; however, the N genes belonged to the same lineage as PDCoVs from the USA, Korea, China, and Hong Kong. The recombination detection program subsequently identified the major parent (S5011 strain) and minor parent (HKU15-44 strain) of the two Vietnam PDCoV strains (p < 0.01).
Collapse
Affiliation(s)
- Van Phan Le
- Faculty of Veterinary Medicine, Vietnam National University of Agriculture, Hanoi, Vietnam
| | - Sok Song
- Virus Disease Division, Animal and Plant Quarantine Agency, Gimcheon, Gyeongbuk-do, 39660, Republic of Korea
| | - Byung-Hyun An
- Applied Chemistry and Biological Engineering, Ajou University, Suwon, 443-749, Republic of Korea
| | - Gyu-Nam Park
- Virus Disease Division, Animal and Plant Quarantine Agency, Gimcheon, Gyeongbuk-do, 39660, Republic of Korea
| | - Ngoc Thach Pham
- Faculty of Veterinary Medicine, Vietnam National University of Agriculture, Hanoi, Vietnam
| | - Dinh Quyen Le
- Research and Development Laboratory, AVAC Vietnam Company Limited (AVAC), Hanoi, Vietnam
| | - Van Tam Nguyen
- Research and Development Laboratory, AVAC Vietnam Company Limited (AVAC), Hanoi, Vietnam
| | - Thi Thu Hang Vu
- Research and Development Laboratory, AVAC Vietnam Company Limited (AVAC), Hanoi, Vietnam
| | - Ki-Sun Kim
- Virus Disease Division, Animal and Plant Quarantine Agency, Gimcheon, Gyeongbuk-do, 39660, Republic of Korea
| | - SeEun Choe
- Virus Disease Division, Animal and Plant Quarantine Agency, Gimcheon, Gyeongbuk-do, 39660, Republic of Korea
| | - Dong-Jun An
- Virus Disease Division, Animal and Plant Quarantine Agency, Gimcheon, Gyeongbuk-do, 39660, Republic of Korea.
| |
Collapse
|
14
|
Baudon E, Poon LL, Dao TD, Pham NT, Cowling BJ, Peyre M, Nguyen KV, Peiris M. Detection of Novel Reassortant Influenza A (H3N2) and H1N1 2009 Pandemic Viruses in Swine in Hanoi, Vietnam. Zoonoses Public Health 2014; 62:429-34. [PMID: 25363845 DOI: 10.1111/zph.12164] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [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: 05/22/2014] [Indexed: 01/13/2023]
Abstract
From May to September 2013, monthly samples were collected from swine in a Vietnamese slaughterhouse for influenza virus isolation and serological testing. A(H1N1)pdm09 viruses and a novel H3N2 originating from reassortment between A(H1N1)pdm09 and novel viruses of the North American triple reassortant lineage were isolated. Serological results showed low seroprevalence for the novel H3N2 virus and higher seroprevalence for A(H1N1)pdm09 viruses. In addition, serology suggested that other swine influenza viruses are also circulating in Vietnamese swine.
Collapse
Affiliation(s)
- E Baudon
- School of Public Health, The University of Hong Kong, Hong Kong, China.,CIRAD, UPR AGIRs, Montpellier, France
| | - L L Poon
- School of Public Health, The University of Hong Kong, Hong Kong, China
| | - T D Dao
- National Institute of Veterinary Research, Hanoi, Vietnam
| | - N T Pham
- National Institute of Veterinary Research, Hanoi, Vietnam
| | - B J Cowling
- School of Public Health, The University of Hong Kong, Hong Kong, China
| | - M Peyre
- CIRAD, UPR AGIRs, Montpellier, France
| | - K V Nguyen
- National Institute of Veterinary Research, Hanoi, Vietnam
| | - M Peiris
- School of Public Health, The University of Hong Kong, Hong Kong, China
| |
Collapse
|
15
|
Le TS, Le CT, Le TH, Pham NT, Nguyen TDT, Cao Nhan H, Nguyen TTL. 537 CONGENITAL VAGINAL OBSTRUCTIONS: DIAGNOSIS AND SURGICAL TREATMENT. J Urol 2010. [DOI: 10.1016/j.juro.2010.02.736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
16
|
Pham NT, McHale G, Newton MI, Carroll BJ, Rowan SM. Application of the quartz crystal microbalance to the evaporation of colloidal suspension droplets. Langmuir 2004; 20:841-847. [PMID: 15773113 DOI: 10.1021/la0357007] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
An investigation into the evaporation of sessile droplets of latex and clay particle suspensions is presented in this work. The quartz crystal microbalance (QCM) has been used to study the interfacial phenomena during the drying process of these droplets. Characteristic changes of the crystal oscillating frequency and crystal resistance (damping of the oscillating energy) have been observed and related to the different stages of the evaporation process. Measurements have been made for latex particle sizes from 1.9 to 10 microm and for rough and polished crystals using drops from 0.3 to 1.5 microL. The behavior of the QCM is shown to depend strongly on the size of particles present and on the morphology of the crystal surface. One of the most striking features is a drastic damping of the oscillation energy and corresponding rise in frequency observed during the final stages of evaporation, particularly for the clay suspensions.
Collapse
Affiliation(s)
- N T Pham
- School of Science, The Nottingham Trent University, Clifton Lane, Nottingham NG11 8NS, United Kingdom.
| | | | | | | | | |
Collapse
|
17
|
Abstract
This work is devoted to a kinetics study of cadmium electrochemical cementation on zinc powder under ultrasonic low-frequency field (20 kHz). Compared to mechanical stirring with a Rushton turbine and for the same suspension quality, ultrasound lead to a lower kinetics during the major part of the reaction but to final conversion rate near 100%. Pointing out a thermal modification in the deposit morphology due to acoustic cavitation, gives explanation to these processes changes. Besides several acting parameter effects, such as temperature, metallic ion concentrations or ultrasonic power have been observed and analysed.
Collapse
Affiliation(s)
- M Aurousseau
- UMR 5631 CNRS-INPG-UJF, BP 75, Cedex 38402 Saint Martin d'Héres, France.
| | | | | |
Collapse
|
18
|
Abstract
AIMS To evaluate the role of nitric oxide (NO) in ocular involvement during systemic toxoplasmosis. METHODS C57B1/6 mice were infected with Toxoplasma gondii strain ME49. The synthesis of NO was inhibited by an intraperitoneal injection of aminoguanidine every 8 hours, starting on the day of infection. Control infected mice received phosphate buffered saline vehicle alone. After 14 days, the ocular lesions were evaluated by histopathological examination. The expression of NO synthase induced in the spleen by toxoplasma infection was evaluated by immunostaining. The production of NO by the spleen cells of infected mice was measured by the colorimetric assay of Griess in the supernatant of cultures stimulated with toxoplasma antigen or concanavalin A. RESULTS The inhibition of NO production in T gondii infected mice resulted in a marked increase in the symptoms of ocular inflammation. We observed a strong induction of NO synthase expression in the spleen of infected animals. In culture, the spleen cells from these mice produced high levels of NO in response to T gondii antigens. This elevation of NO synthesis was suppressed in the presence of aminoguanidine. CONCLUSION This study indicates that NO plays a crucial role in the protection against T gondii infection as reflected by the severity of the ocular involvement.
Collapse
Affiliation(s)
- S Hayashi
- Laboratory of Immunology, National Eye Institute, National Institutes of Health, Bethesda, Maryland 20892-1858, USA
| | | | | | | | | | | |
Collapse
|
19
|
Pham NT, Hart LL. Use of ursodeoxycholic acid in primary biliary cirrhosis. Ann Pharmacother 1993; 27:1472-4. [PMID: 8305782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Affiliation(s)
- N T Pham
- Division of Clinical Pharmacy, School of Pharmacy, University of California, San Francisco 94143
| | | |
Collapse
|
20
|
Matsuoka M, Pham NT, Tsukamoto H. Differential effects of interleukin-1 alpha, tumor necrosis factor alpha, and transforming growth factor beta 1 on cell proliferation and collagen formation by cultured fat-storing cells. Liver 1989; 9:71-8. [PMID: 2785237 DOI: 10.1111/j.1600-0676.1989.tb00382.x] [Citation(s) in RCA: 139] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Fat-storing cells (FSCs), perisinusoidal cells which normally participate in metabolism of vitamin A, have been suggested to participate in collagen synthesis in fibrotic liver. However, key mediators which regulate collagen metabolism in FSCs are yet to be elucidated. In fibroblasts, Interleukin-1 (IL-1), Tumor Necrosis Factor alpha (TNF alpha), and Transforming Growth Factor beta (TGF beta) have been shown to induce diverse modulations of collagen metabolism and cell proliferation. In the present study, these cytokines were tested for their abilities to regulate collagen formation and proliferation by cultured rat FSCs. FSCs primary culture was established and incubated in the absence or presence of various concentrations of IL-1 alpha, TNF alpha, and TGF beta 1. Tritiated proline and thymidine were used to examine collagen formation and cell proliferation. IL-1 alpha (2.5-10 U/ml) had a concentration-dependent stimulatory effect on FSC proliferation with a maximal response of 160% compared to that of untreated FSCs. This mitogenic effect resulted in slight but significant increases (15-20%) in the net collagen formation. However, when this parameter was standardized relative to DNA content, significant inhibition of both collagen and noncollagen protein formation by IL-1 alpha was demonstrated. TNF alpha also exhibited a similar mitogenic effect but induced a more selective inhibition of collagen formation. In contrast, TGF beta 1 (0.01-1 ng/ml) specifically enhanced collagen formation by 60-80%, as also evidenced by significant increases in the ratio of [3H]hydroxyproline to [3H]proline incorporated in newly formed proteins.(ABSTRACT TRUNCATED AT 250 WORDS)
Collapse
Affiliation(s)
- M Matsuoka
- Hepatopancreatic Research Laboratory, VA Medical Center, Martinez
| | | | | |
Collapse
|