Estimation of the herd-level basic reproduction number for African swine fever in Vietnam, 2019

Vet World Vol.15 December-2022 Article-13

Research Article

Veterinary World, 15(12): 2850-2855

https://doi.org/10.14202/vetworld.2022.2850-2855

Thi Ngan Mai, Thanh Trung Nguyen², Viet Anh Vu³, Thi Ngoc Vu¹, and Thi My Le Huynh¹

1. Department of Veterinary Microbiology and Infectious Diseases, Faculty of Veterinary Medicine, Vietnam National University of Agriculture, Hanoi, Vietnam.
2. Department of Pharmacology, Toxicology, Internal Medicine and Diagnostics, Faculty of Veterinary Medicine, Vietnam National University of Agriculture, Hanoi, Vietnam.
3. Central Laboratory, Faculty of Animal Science, Vietnam National University of Agriculture, Hanoi, Vietnam.

Background and Aim: African swine fever (ASF) is a notifiable viral disease of pigs and wild boars that causes severe economic losses to the swine industry. The pig industry in Vietnam was recently attacked by the ASF virus (ASFV) for the first time in history. However, we lack information regarding the transmissibility of ASF within indoor production systems communities, such as those in Vietnam. Therefore, we aimed to estimate the basic reproduction number (R0) for ASF during the early stages of transmission between farms in indoor production system communities from local and national data in Vietnam.

Materials and Methods: The linear regression model approach for the susceptible infectious method was used in this study to estimate the transmission rate and, consequently, the R0 value.

Results: The R0 values between-farm of ASF ranged from 1.41 to 10.8 in different scenarios of infectious period duration, from 15 to 30 days at the national and local levels.

Conclusion: These results help to understand the scale and speed of ASF infection in Vietnam and to provide a scientific basis to implement control measures to restrict the spread of ASFV in other locations. Keywords: African swine fever, basic reproduction number, indoor production, Vietnam.

Keywords: African swine fever, basic reproduction number, indoor production, Vietnam.

How to cite this article: Mai TN, Nguyen TT, Vu VA, Vu TN, and Huynh TML (2022) Estimation of the herd-level basic reproduction number for African swine fever in Vietnam, 2019, Veterinary World, 15(12): 2850–2855.

Received: 21-07-2022 Accepted: 15-11-2022 Published online: 15-12-2022

Corresponding author: Thi My Le Huynh E-mail: huynhtmle@vnua.edu.vn

DOI: 10.14202/vetworld.2022.2850-2855

Copyright: Mai, et al. This article is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http:// creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.