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Papers by tran phuc
International Journal for Parasitology, 2009
Soil-transmitted helminth (STH) infections are endemic in northern Viet Nam where the climate and... more Soil-transmitted helminth (STH) infections are endemic in northern Viet Nam where the climate and agricultural practices, such as the use of human excreta as fertiliser and the use of wastewater for irrigation, favour transmission. An intervention was conducted in Yen Bai Province, northwest Viet Nam, to measure the effectiveness of single dose albendazole (400 mg) administered every 4 months for reducing the prevalence of STH infections in women of reproductive age. Stool samples were collected from women before the intervention and 3 and 12 months post intervention. Information on a range of demographic and socioeconomic variables was also collected to measure the major risk factors for high STH burden in this area. The prevalence of hookworm, Ascaris lumbricoides, and Trichuris trichiura infection in the baseline sample of 366 women were 76.2%, 19.2% and 29.1% respectively. In the women who were surveyed at baseline and again at 3 and 12 months after the intervention (N=118) cure rates were 71.3% for hookworm, 87.0% for A. lumbricoides and 81.4% for T. trichiura by the end of the 12 month study period (i.e. with 3 doses of albendazole). The main risk factor for hookworm infection was if a women worked outside [OR =3.2 (95% CI 1.6-6.2), p=0.001] and the major risk factor for A. lumbricoides and T. trichiura infection was a lack of education. Low educational attainment was also the *
Viruses, 2021
Redondoviridae is a recently discovered DNA virus family consisting of two species, vientovirus a... more Redondoviridae is a recently discovered DNA virus family consisting of two species, vientovirus and brisavirus. Here we used PCR amplification and sequencing to characterize redondoviruses in nasal/throat swabs collected longitudinally from a cohort of 58 individuals working with animals in Vietnam. We additionally analyzed samples from animals to which redondovirus DNA-positive participants were exposed. Redondoviruses were detected in approximately 60% of study participants, including 33% (30/91) of samples collected during episodes of acute respiratory disease and in 50% (29/58) of baseline samples (with no respiratory symptoms). Vientovirus (73%; 24/33) was detected more frequently in samples than brisaviruses (27%; 9/33). In the 23 participants with at least 2 redondovirus-positive samples among their longitudinal samples, 10 (43.5%) had identical redondovirus replication-gene sequences detected (sampling duration: 35–132 days). We found no identical redondovirus replication ge...
PLoS ONE, 2011
Background: To estimate the cost and cost-effectiveness of a project administering de-worming and... more Background: To estimate the cost and cost-effectiveness of a project administering de-worming and weekly iron-folic acid supplementation to control anaemia in women of reproductive age in Yen Bai province, Vietnam. Methods and Findings: Cost effectiveness was evaluated using data on programmatic costs based on two surveys in 2006 and 2009 and impact on anaemia and iron status collected in 2006, 2007, and 2008. Data on initial costs for training and educational materials were obtained from the records of the National Institute of Malariology, Parasitology and Entomology and the Yen Bai Malaria Control Program. Structured questionnaires for health workers at district, commune and village level were used to collect ongoing distribution and monitoring costs, and for participants to collect transport and loss of earnings costs. The cost per woman treated (defined as consuming at least 75% of the recommended intake) was USD0.76 per annum. This estimate includes financial costs (for supplies, training), and costs of health care workers' time. Prevalence of anaemia fell from 38% at baseline, to 20% after 12 months. Thus, the cost-effectiveness of the project is assessed at USD 4.24 per anaemia case prevented per year. Based on estimated productivity gains for adult women, the benefit:cost ratio is 6.7:1. Cost of the supplements and anthelminthics was 47% of the total, while costs of training, monitoring, and health workers' time accounted for 53%. Conclusion: The study shows that weekly iron-folic acid supplementation and regular de-worming is a low-cost and costeffective intervention and would be appropriate for population-based introduction in settings with a high prevalence of anaemia and iron deficiency and low malaria infection rates.
Journal of Risk and Financial Management
Agricultural production accounts for 64.2% of the Vietnam’s Mekong Delta. However, this sector ha... more Agricultural production accounts for 64.2% of the Vietnam’s Mekong Delta. However, this sector has to face damage risks, especially from the natural disasters, such as flood, drought, severe soil salinity, pests, and erosion, which might factor into the farmers’ risk attitude and their decision-making relative to investment in production activities. This study analyzes the factors influencing the risk attitudes of the rice farmers, based on evidence from the Vietnamese Mekong Delta. The data were collected through face-to-face interviews and experimental games with 145 rice farmers. An ordered probit regression model was applied to estimate how the factors affected the rice farmers’ risk attitudes. The risk-neutral farmers comprised 53.72% of farmers in the survey, while 31.72% and 15.15% were risk-preferred and risk-averse farmers. The study results indicated that age, number of rice crops per year, household assets, income from rice production, and credit accessibility were the ma...
PROCEEDINGS OF THE 14TH NATIONAL CONFERENCE ON FUNDAMENTAL AND APPLIED INFORMATION TECHNOLOGY RESEARCH
Currently, there are many different systems helping visitors look up tourist information. However... more Currently, there are many different systems helping visitors look up tourist information. However, to visit famous tourist attractions, visitors need to know all the information such as accommodation, nearby restaurants, and other attractions. Most tourists search for information using search engines, but most of the results do not meet their requirements. This article proposes a system for recommending tourist attractions in Da Lat City by using the Semantic Web, the Semantic Web Rule Language, and the KNN algorithm (K-Nearest Neighbor) for finding and displaying most relevant tourist information. This system is built in Python language and built as a web application. The system allows users to choose recommendations according to their personal preferences (accommodation, places to eat, type of attractions,etc.), thereby suggesting data to find appropriate and suitable destinations according to their needs.
International Journal for Parasitology, 2009
Soil-transmitted helminth (STH) infections are endemic in northern Viet Nam where the climate and... more Soil-transmitted helminth (STH) infections are endemic in northern Viet Nam where the climate and agricultural practices, such as the use of human excreta as fertiliser and the use of wastewater for irrigation, favour transmission. An intervention was conducted in Yen Bai Province, northwest Viet Nam, to measure the effectiveness of single dose albendazole (400 mg) administered every 4 months for reducing the prevalence of STH infections in women of reproductive age. Stool samples were collected from women before the intervention and 3 and 12 months post intervention. Information on a range of demographic and socioeconomic variables was also collected to measure the major risk factors for high STH burden in this area. The prevalence of hookworm, Ascaris lumbricoides, and Trichuris trichiura infection in the baseline sample of 366 women were 76.2%, 19.2% and 29.1% respectively. In the women who were surveyed at baseline and again at 3 and 12 months after the intervention (N=118) cure rates were 71.3% for hookworm, 87.0% for A. lumbricoides and 81.4% for T. trichiura by the end of the 12 month study period (i.e. with 3 doses of albendazole). The main risk factor for hookworm infection was if a women worked outside [OR =3.2 (95% CI 1.6-6.2), p=0.001] and the major risk factor for A. lumbricoides and T. trichiura infection was a lack of education. Low educational attainment was also the *
Viruses, 2021
Redondoviridae is a recently discovered DNA virus family consisting of two species, vientovirus a... more Redondoviridae is a recently discovered DNA virus family consisting of two species, vientovirus and brisavirus. Here we used PCR amplification and sequencing to characterize redondoviruses in nasal/throat swabs collected longitudinally from a cohort of 58 individuals working with animals in Vietnam. We additionally analyzed samples from animals to which redondovirus DNA-positive participants were exposed. Redondoviruses were detected in approximately 60% of study participants, including 33% (30/91) of samples collected during episodes of acute respiratory disease and in 50% (29/58) of baseline samples (with no respiratory symptoms). Vientovirus (73%; 24/33) was detected more frequently in samples than brisaviruses (27%; 9/33). In the 23 participants with at least 2 redondovirus-positive samples among their longitudinal samples, 10 (43.5%) had identical redondovirus replication-gene sequences detected (sampling duration: 35–132 days). We found no identical redondovirus replication ge...
PLoS ONE, 2011
Background: To estimate the cost and cost-effectiveness of a project administering de-worming and... more Background: To estimate the cost and cost-effectiveness of a project administering de-worming and weekly iron-folic acid supplementation to control anaemia in women of reproductive age in Yen Bai province, Vietnam. Methods and Findings: Cost effectiveness was evaluated using data on programmatic costs based on two surveys in 2006 and 2009 and impact on anaemia and iron status collected in 2006, 2007, and 2008. Data on initial costs for training and educational materials were obtained from the records of the National Institute of Malariology, Parasitology and Entomology and the Yen Bai Malaria Control Program. Structured questionnaires for health workers at district, commune and village level were used to collect ongoing distribution and monitoring costs, and for participants to collect transport and loss of earnings costs. The cost per woman treated (defined as consuming at least 75% of the recommended intake) was USD0.76 per annum. This estimate includes financial costs (for supplies, training), and costs of health care workers' time. Prevalence of anaemia fell from 38% at baseline, to 20% after 12 months. Thus, the cost-effectiveness of the project is assessed at USD 4.24 per anaemia case prevented per year. Based on estimated productivity gains for adult women, the benefit:cost ratio is 6.7:1. Cost of the supplements and anthelminthics was 47% of the total, while costs of training, monitoring, and health workers' time accounted for 53%. Conclusion: The study shows that weekly iron-folic acid supplementation and regular de-worming is a low-cost and costeffective intervention and would be appropriate for population-based introduction in settings with a high prevalence of anaemia and iron deficiency and low malaria infection rates.
Journal of Risk and Financial Management
Agricultural production accounts for 64.2% of the Vietnam’s Mekong Delta. However, this sector ha... more Agricultural production accounts for 64.2% of the Vietnam’s Mekong Delta. However, this sector has to face damage risks, especially from the natural disasters, such as flood, drought, severe soil salinity, pests, and erosion, which might factor into the farmers’ risk attitude and their decision-making relative to investment in production activities. This study analyzes the factors influencing the risk attitudes of the rice farmers, based on evidence from the Vietnamese Mekong Delta. The data were collected through face-to-face interviews and experimental games with 145 rice farmers. An ordered probit regression model was applied to estimate how the factors affected the rice farmers’ risk attitudes. The risk-neutral farmers comprised 53.72% of farmers in the survey, while 31.72% and 15.15% were risk-preferred and risk-averse farmers. The study results indicated that age, number of rice crops per year, household assets, income from rice production, and credit accessibility were the ma...
PROCEEDINGS OF THE 14TH NATIONAL CONFERENCE ON FUNDAMENTAL AND APPLIED INFORMATION TECHNOLOGY RESEARCH
Currently, there are many different systems helping visitors look up tourist information. However... more Currently, there are many different systems helping visitors look up tourist information. However, to visit famous tourist attractions, visitors need to know all the information such as accommodation, nearby restaurants, and other attractions. Most tourists search for information using search engines, but most of the results do not meet their requirements. This article proposes a system for recommending tourist attractions in Da Lat City by using the Semantic Web, the Semantic Web Rule Language, and the KNN algorithm (K-Nearest Neighbor) for finding and displaying most relevant tourist information. This system is built in Python language and built as a web application. The system allows users to choose recommendations according to their personal preferences (accommodation, places to eat, type of attractions,etc.), thereby suggesting data to find appropriate and suitable destinations according to their needs.