5 results on '"Long Thanh Pham"'
Search Results
2. Movement and contact patterns of long-distance free-grazing ducks and avian influenza persistence in Vietnam.
- Author
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Anne Meyer, Tung Xuan Dinh, Thu Van Nhu, Long Thanh Pham, Scott Newman, Thuy Thi Thanh Nguyen, Dirk Udo Pfeiffer, and Timothée Vergne
- Subjects
Medicine ,Science - Abstract
Presence of ducks, and in particular of free-grazing ducks, has consistently been shown to be one of the most important risk factors for highly pathogenic avian influenza outbreaks which has compromised poultry production in South-East Asia since the early 2000s and continues to threaten public health, farmers' livelihood and food security. Although free-grazing duck production has been practised for decades in South-East Asia, there are few published studies describing this production system, which is suspected to play an important role in the maintenance of avian influenza viruses. This study aimed at describing quantitatively the long-distance free-grazing duck production system in South Vietnam, characterising the movement and contact patterns of the duck flocks, and identifying potential associations between farming practices, movement and contact patterns and the circulation of avian influenza viruses. We conducted interviews among stakeholders involved in the free-grazing duck production system (duck farmers, transporters and rice paddy owners) in combination with a virological cross-sectional survey in South Vietnam. Results show that both direct and indirect contacts between free-grazing duck flocks were frequent and diverse. The flocks were transported extensively across district and province boundaries, mainly by boat but also by truck or on foot. A third of the investigated flocks had a positive influenza A virology test, indicating current circulation of avian influenza viruses, but none were positive for H5 subtypes. The age and size of the flock as well as its location at the time of sampling were associated with the risk of influenza A circulation in the flocks. These findings should be considered when developing risk assessment models of influenza virus spread aimed at informing the development of improved biosecurity practices leading to enhanced animal health, sustainable animal production and reliable income for farmers.
- Published
- 2017
- Full Text
- View/download PDF
3. Knowledge and practice on prevention of mosquito-borne diseases in livestock-keeping and non-livestock-keeping communities in Hanoi city, Vietnam: A mixed-method study
- Author
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Long Thanh Pham, Anh Ngoc Bui, Son Hai Tran, Åke Lundkvist, Hung Nguyen-Viet, Vuong Nghia Bui, Thanh Thi Vu, Thang Nguyen-Tien, Duoc Trong Vu, Ulf Magnusson, Trung Duc Hoang, Lieu Thi Vu, and Johanna F. Lindahl
- Subjects
Male ,Health Knowledge, Attitudes, Practice ,Viral Diseases ,Epidemiology ,Social Sciences ,Mosquito population ,Disease Vectors ,Qualitative survey ,Mosquitoes ,Dengue Fever ,High morbidity ,0302 clinical medicine ,Basic knowledge ,Medical Conditions ,Sociology ,Residence Characteristics ,Surveys and Questionnaires ,Health care ,Medicine and Health Sciences ,030212 general & internal medicine ,Animal Management ,Multidisciplinary ,Schools ,Eukaryota ,Public Health, Global Health, Social Medicine and Epidemiology ,Agriculture ,Middle Aged ,Clinical Science ,Insects ,Geography ,Infectious Diseases ,Vietnam ,Veterinary Diseases ,Medicine ,Livestock ,Female ,Research Article ,Neglected Tropical Diseases ,Adult ,Veterinary Medicine ,Adolescent ,Arthropoda ,Science ,030231 tropical medicine ,Vector Borne Diseases ,Office workers ,Education ,03 medical and health sciences ,Young Adult ,Environmental health ,parasitic diseases ,medicine ,Parasitic Diseases ,Animals ,Humans ,Cities ,business.industry ,Organisms ,Biology and Life Sciences ,medicine.disease ,Tropical Diseases ,Invertebrates ,Insect Vectors ,Malaria ,Folkhälsovetenskap, global hälsa, socialmedicin och epidemiologi ,Species Interactions ,Cross-Sectional Studies ,Medical Risk Factors ,Veterinary Science ,Livestock Care ,business ,Zoology ,Entomology - Abstract
Mosquito-borne diseases (MBDs) are causing high morbidity and mortality for humans. Urban livestock keeping is still common in cities around the world. The animals may serve as reservoirs for zoonotic MBDs, which increase the risks for humans. Here we assess the knowledge and practices related to MBDs in households with livestock and without livestock and explore the perceptions of the health care sector about MBDs and livestock keeping in Hanoi city of Vietnam in a cross-sectional study. A quantitative survey was conducted including 513 households with and without livestock-keeping in six districts and complemented with qualitative surveys with four health staff from Hanoi Center of Disease Control and three district health centers. The quantitative survey indicated that the participants possessed basic knowledge on MBDs with an average score of 18.3 out of 35, of which non-livestock-keeping households had a better knowledge than households keeping livestock (p
- Published
- 2021
4. Spatio-temporal distribution of outbreaks of highly pathogenic avian influenza virus subtype H5N1 in Vietnam, 2015- 2018
- Author
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Mark Stevenson, Leo Loth, and Long Thanh Pham
- Subjects
medicine.medical_specialty ,Scan statistic ,animal diseases ,medicine.disease_cause ,Disease Outbreaks ,Spatio-Temporal Analysis ,Risk Factors ,Environmental health ,Epidemiology ,Influenza A virus ,medicine ,Animals ,Poultry Diseases ,General Veterinary ,General Immunology and Microbiology ,Influenza A Virus, H5N1 Subtype ,Incidence (epidemiology) ,virus diseases ,Outbreak ,General Medicine ,Influenza A virus subtype H5N1 ,Vaccination ,Geography ,Ducks ,Vietnam ,Influenza in Birds ,Flock ,Chickens - Abstract
Despite strong commitments of the central and provincial veterinary authorities in Vietnam to control highly pathogenic avian influenza H5N1 (HPAI-H5N1) in poultry and to diminish the risk of human infection, outbreaks continue to occur in poultry. This study describes the spatio-temporal distribution of HPAI-H5N1 outbreaks in Vietnam for the period December 2014-April 2018 using the space-time K-function and the space-time scan statistic. The space-time K-function analyses showed statistically significant spatio-temporal clustering of HPAI-H5N1 outbreaks in poultry during the study period of up to 50 days and 60 kilometres. The space-time scan statistic test identified three statistically significant space-time clusters of HPAI-H5N1 in the south of the country where the incidence of HPAI-H5N1 outbreaks was greater than that expected if outbreaks were randomly distributed in space and time. The analyses indicated shortfalls in the effectiveness of control measures used to control HPAI-H5N1 throughout the study period. Development of a better understanding of the relative impact of HPAI-H5N1 control measures (depopulation of infected flocks, vaccination, movement restrictions) on space-time interaction would allow animal health authorities to focus their efforts on control measures shown to have the greatest relative effect.
- Published
- 2019
5. Movement and contact patterns of long-distance free-grazing ducks and avian influenza persistence in Vietnam
- Author
-
Timothée Vergne, Thu Van Nhu, Dirk U. Pfeiffer, Long Thanh Pham, Scott H. Newman, Anne Meyer, Thuy Thi Thanh Nguyen, Tung Xuan Dinh, Royal Veterinary College [London], University of London [London], National Institute for Animal Sciences, Food and Agriculture Organization of the United Nations [Rome, Italie] (FAO), Maladies infectieuses et vecteurs : écologie, génétique, évolution et contrôle (MIVEGEC), and Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])
- Subjects
RNA viruses ,0301 basic medicine ,Viral Diseases ,Veterinary medicine ,animal diseases ,Waterfowl ,Biosecurity ,lcsh:Medicine ,Antibodies, Viral ,medicine.disease_cause ,Poultry ,Disease Outbreaks ,Animal Diseases ,Geographical Locations ,0403 veterinary science ,Risk Factors ,Zoonoses ,Prevalence ,Influenza A virus ,Animal Husbandry ,lcsh:Science ,Socioeconomics ,Pathology and laboratory medicine ,2. Zero hunger ,Multidisciplinary ,Food security ,virus diseases ,Agriculture ,04 agricultural and veterinary sciences ,Medical microbiology ,Plants ,Livelihood ,Professions ,Ducks ,Infectious Diseases ,Vietnam ,Experimental Organism Systems ,Vertebrates ,Viruses ,Agricultural Workers ,Livestock ,Pathogens ,Research Article ,Avian Influenza ,Asia ,040301 veterinary sciences ,Biology ,Research and Analysis Methods ,Microbiology ,Birds ,Animal Influenza ,03 medical and health sciences ,Plant and Algal Models ,medicine ,Animals ,Influenza viruses ,Grasses ,Poultry Diseases ,Medicine and health sciences ,[SDV.BA.MVSA]Life Sciences [q-bio]/Animal biology/Veterinary medicine and animal Health ,business.industry ,lcsh:R ,Organisms ,Viral pathogens ,Biology and Life Sciences ,Outbreak ,Influenza ,Influenza A virus subtype H5N1 ,Microbial pathogens ,Cross-Sectional Studies ,030104 developmental biology ,Fowl ,Influenza in Birds ,Amniotes ,People and Places ,Population Groupings ,lcsh:Q ,[SDV.SPEE]Life Sciences [q-bio]/Santé publique et épidémiologie ,Rice ,Flock ,business ,Zoology ,Orthomyxoviruses - Abstract
International audience; Presence of ducks, and in particular of free-grazing ducks, has consistently been shown to be one of the most important risk factors for highly pathogenic avian influenza outbreaks which has compromised poultry production in SouthEast Asia since the early 2000s and continues to threaten public health, farmers' livelihood and food security. Although free-grazing duck production has been practised for decades in SouthEast Asia, there are few published studies describing this production system, which is suspected to play an important role in the maintenance of avian influenza viruses. This study aimed at describing quantitatively the long-distance free-grazing duck production system in South Vietnam, characteris-ing the movement and contact patterns of the duck flocks, and identifying potential associations between farming practices, movement and contact patterns and the circulation of avian influenza viruses. We conducted interviews among stakeholders involved in the free-grazing duck production system (duck farmers, transporters and rice paddy owners) in combination with a virological cross-sectional survey in South Vietnam. Results show that both direct and indirect contacts between free-grazing duck flocks were frequent and diverse. The flocks were transported extensively across district and province boundaries, mainly by boat but also by truck or on foot. A third of the investigated flocks had a positive influenza A virology test, indicating current circulation of avian influenza viruses, but none were positive for H5 subtypes. The age and size of the flock as well as its location at the time of sampling were associated with the risk of influenza A circulation in the flocks. These findings should be considered when developing risk assessment models of influenza virus spread aimed at informing the development of improved biosecurity practices leading to enhanced animal health, sustainable animal production and reliable income for farmers.
- Published
- 2017
- Full Text
- View/download PDF
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