Early‐phase risk assessments during the first epidemic year of African swine fever outbreaks in Vietnamese pigs
Abstract Background African swine fever (ASF) is a notifiable viral disease of pigs and wild boars that could lead to serious economic losses for the swine industry. Objectives The aim of this study was to identify risk factors in the early phase of ASF outbreaks in Vietnamese swine herds during the...
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| Format: | Article |
| Language: | English |
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Wiley
2022-09-01
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| Series: | Veterinary Medicine and Science |
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| Online Access: | https://doi.org/10.1002/vms3.852 |
| _version_ | 1798001226646814720 |
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| author | Ngan Thi Mai Le Anh Tuyen Le Van Truong Le Thi My Huynh Pham Thi Lan Huong Vu Duc Hanh Vu Viet Anh Nguyen Xuan Hoa Tran Quang Vui Satoshi Sekiguchi |
| author_facet | Ngan Thi Mai Le Anh Tuyen Le Van Truong Le Thi My Huynh Pham Thi Lan Huong Vu Duc Hanh Vu Viet Anh Nguyen Xuan Hoa Tran Quang Vui Satoshi Sekiguchi |
| author_sort | Ngan Thi Mai |
| collection | DOAJ |
| description | Abstract Background African swine fever (ASF) is a notifiable viral disease of pigs and wild boars that could lead to serious economic losses for the swine industry. Objectives The aim of this study was to identify risk factors in the early phase of ASF outbreaks in Vietnamese swine herds during the first epidemic year. Methods The period of interest for this case–control study was February to July 2019. A questionnaire was administered in northern Vietnam where all early cases of ASF were reported. Producers of herds with reported cases were asked to provide information starting from the day of onset of clinical signs as well as 30 days prior to that day. The period of interest for controls was within the 6 months of the first outbreak in Vietnam (February 2019). Questionnaires included 55 questions; responses were received from 67 cases and 115 controls. Logistic regression analysis was used to identify factors associated with ASF status. Results Thirty‐seven variables of interest (among a total of 55 variables) were associated with ASF status in univariate analysis (p < 0.05). These 37 variables were assessed for inclusion in the multivariate analysis by backward stepwise selection. Six variables remained significant as ASF risk factors in the final model: distance to farm within 500 m, distance of irrigation systems within 200 m, total number of pigs (≤500), absence of dressing rooms for workers/visitors before entering the farm, poor hygienic practices for people within the farm, and poor hygienic practices at pig loading/unloading locations. Conclusions These results may help in understanding the epidemiology of ASF in Vietnam and provide a scientific basis for optimization of current interventions and development of new tools and strategies to reduce transmission of ASF. |
| first_indexed | 2024-04-11T11:32:52Z |
| format | Article |
| id | doaj.art-bd170da0a59f4455a2b06bb8f08cad49 |
| institution | Directory Open Access Journal |
| issn | 2053-1095 |
| language | English |
| last_indexed | 2024-04-11T11:32:52Z |
| publishDate | 2022-09-01 |
| publisher | Wiley |
| record_format | Article |
| series | Veterinary Medicine and Science |
| spelling | doaj.art-bd170da0a59f4455a2b06bb8f08cad492022-12-22T04:26:05ZengWileyVeterinary Medicine and Science2053-10952022-09-01851993200410.1002/vms3.852Early‐phase risk assessments during the first epidemic year of African swine fever outbreaks in Vietnamese pigsNgan Thi Mai0Le Anh Tuyen1Le Van Truong2Le Thi My Huynh3Pham Thi Lan Huong4Vu Duc Hanh5Vu Viet Anh6Nguyen Xuan Hoa7Tran Quang Vui8Satoshi Sekiguchi9Department of Veterinary Microbiology and Infectious Diseases Faculty of Veterinary Medicine Vietnam National University of Agriculture Hanoi VietnamDepartment of Veterinary Microbiology and Infectious Diseases Faculty of Veterinary Medicine Vietnam National University of Agriculture Hanoi VietnamDepartment of Veterinary Microbiology and Infectious Diseases Faculty of Veterinary Medicine Vietnam National University of Agriculture Hanoi VietnamDepartment of Veterinary Microbiology and Infectious Diseases Faculty of Veterinary Medicine Vietnam National University of Agriculture Hanoi VietnamDepartment of Pharmacology, Toxicology, Internal Medicine and Diagnostics Faculty of Veterinary Medicine Vietnam National University of Agriculture Hanoi VietnamDepartment of Veterinary Anatomy, Histology and Embryology Faculty of Veterinary Medicine Vietnam National University of Agriculture Hanoi VietnamCentral Laboratory Faculty of Animal Science Vietnam National University of Agriculture Hanoi VietnamDepartment of Veterinary Medicine Faculty of Animal Husbandry and Veterinary Medicine Hue University of Agriculture and Forestry Hue VietnamDepartment of Veterinary Medicine Faculty of Animal Husbandry and Veterinary Medicine Hue University of Agriculture and Forestry Hue VietnamCenter for Animal Disease Control University of Miyazaki Miyazaki JapanAbstract Background African swine fever (ASF) is a notifiable viral disease of pigs and wild boars that could lead to serious economic losses for the swine industry. Objectives The aim of this study was to identify risk factors in the early phase of ASF outbreaks in Vietnamese swine herds during the first epidemic year. Methods The period of interest for this case–control study was February to July 2019. A questionnaire was administered in northern Vietnam where all early cases of ASF were reported. Producers of herds with reported cases were asked to provide information starting from the day of onset of clinical signs as well as 30 days prior to that day. The period of interest for controls was within the 6 months of the first outbreak in Vietnam (February 2019). Questionnaires included 55 questions; responses were received from 67 cases and 115 controls. Logistic regression analysis was used to identify factors associated with ASF status. Results Thirty‐seven variables of interest (among a total of 55 variables) were associated with ASF status in univariate analysis (p < 0.05). These 37 variables were assessed for inclusion in the multivariate analysis by backward stepwise selection. Six variables remained significant as ASF risk factors in the final model: distance to farm within 500 m, distance of irrigation systems within 200 m, total number of pigs (≤500), absence of dressing rooms for workers/visitors before entering the farm, poor hygienic practices for people within the farm, and poor hygienic practices at pig loading/unloading locations. Conclusions These results may help in understanding the epidemiology of ASF in Vietnam and provide a scientific basis for optimization of current interventions and development of new tools and strategies to reduce transmission of ASF.https://doi.org/10.1002/vms3.852ASFcase–control studyepidemicrisk factorsVietnam |
| spellingShingle | Ngan Thi Mai Le Anh Tuyen Le Van Truong Le Thi My Huynh Pham Thi Lan Huong Vu Duc Hanh Vu Viet Anh Nguyen Xuan Hoa Tran Quang Vui Satoshi Sekiguchi Early‐phase risk assessments during the first epidemic year of African swine fever outbreaks in Vietnamese pigs Veterinary Medicine and Science ASF case–control study epidemic risk factors Vietnam |
| title | Early‐phase risk assessments during the first epidemic year of African swine fever outbreaks in Vietnamese pigs |
| title_full | Early‐phase risk assessments during the first epidemic year of African swine fever outbreaks in Vietnamese pigs |
| title_fullStr | Early‐phase risk assessments during the first epidemic year of African swine fever outbreaks in Vietnamese pigs |
| title_full_unstemmed | Early‐phase risk assessments during the first epidemic year of African swine fever outbreaks in Vietnamese pigs |
| title_short | Early‐phase risk assessments during the first epidemic year of African swine fever outbreaks in Vietnamese pigs |
| title_sort | early phase risk assessments during the first epidemic year of african swine fever outbreaks in vietnamese pigs |
| topic | ASF case–control study epidemic risk factors Vietnam |
| url | https://doi.org/10.1002/vms3.852 |
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