Browse > Article
http://dx.doi.org/10.5713/ajas.2014.14060

An Integrated Epidemiological and Economic Analysis of Vaccination against Highly Pathogenic Porcine Reproductive and Respiratory Syndrome (PRRS) in Thua Thien Hue Province, Vietnam  

Zhang, Haifeng (Graduate School of Obihiro University of Agriculture and Veterinary Medicine)
Kono, Hiroichi (Department of Animal and Food Hygiene, Obihiro University of Agriculture and Veterinary Medicine)
Kubota, Satoko (Department of Animal and Food Hygiene, Obihiro University of Agriculture and Veterinary Medicine)
Publication Information
Asian-Australasian Journal of Animal Sciences / v.27, no.10, 2014 , pp. 1499-1512 More about this Journal
Abstract
The purposes of this study are to assess pig farmers' preference for highly pathogenic porcine reproductive and respiratory syndrome (PRRS) vaccine, and estimate the cost and benefit of PRRS vaccination in Vietnam. This study employed an integrated epidemiological and economic analysis which combined susceptible-infectious-recovered (SIR) model, choice experiment (CE) and cost-benefit analysis (CBA) together. The result of SIR model showed the basic reproduction number ($R_0$) of PRRS transmission in this study is 1.3, consequently, the optimal vaccination percentage is 26%. The results of CE in this study indicate that Vietnam pig farmers are showing a high preference for the PRRS vaccine. However, their mean willingness to pay is lower than the potential cost of PRRS vaccine. It can be considered to be one of the reasons that the PRRS vaccination ratio is still low in Vietnam. The results of CBA specified from the whole society's point of view (Social perspective), the benefits of PRRS vaccination are 2.3 to 4.5 times larger than the costs. To support policy making for increasing the PRRS vaccination proportion, this study indicates two ways to increase the vaccination proportion: i) decrease vaccine price by providing a subsidy, ii) provide compensation of culling only for PRRS vaccinated pigs.
Keywords
Choice Experiment; Cost-Benefit Analysis; Susceptible-infectious-recovered Model; Porcine Reproductive and Respiratory Syndrome; Vietnam;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Morris R. 1969. Assessing the economic value of veterinary services to primary industries. Aust. Vet. J. 45:295-300.   DOI   ScienceOn
2 Nodelijk, G., M. C. M. D. Jong, A. V. Nes, J. C. M. Vernooy, L. A. M. G. V. Leengoed, J. M. A. Pol, and J. H. M. Verheijden. 2000. Introduction, persistence and fade-out of porcine reproductive and respiratory syndrome virus in a Dutch breeding herd: a mathematical analysis. Epidemiol. Infect. 124:173-182.   DOI   ScienceOn
3 Otieno, D. J., E. Ruto, and L. Hubbard. 2011. Cattle farmers' preferences for disease-free zones in Kenya: An application of the choice experiment method. J. Agric. Econ. 62:207-224.   DOI   ScienceOn
4 Revelt, D. and K. Train. 1998. Mixed logit with repeated choices: Household's choices of appliance efficiency level. Rev. Econ. Stat. 80:647-657.   DOI   ScienceOn
5 Rich, K. M. and A. Winter-Nelson. 2007. An integrated epidemiological-economic analysis of foot and mouth disease: Applications to the southern cone of South America. Am. J. Agric. Econ. 89:682-697.   DOI   ScienceOn
6 Roessler, R., P. Herold, A. Willan, H. P. Piepho, L. T. Thuy, and A. Valle Zarate. 2009. Modelling of a recording scheme for market-oriented smallholder pig producers in Northwest Vietnam. Livest. Sci. 123:241-248.   DOI   ScienceOn
7 Train, K. E. 2003. Discrete Choice Methods with Simulation. Cambridge University Press, New York, NY, USA.
8 Vynnycky, E. and R. White. 2010. An Introduction to Infectious Disease Modeling. Oxford University Press, New York, NY, USA.
9 Wakui, Y. 2009. Dougu tosite no beizutoukei (Analyzing tool of Bayesian statistics). Nippon Jitugyou Publishing, Tokyo, Japan. (in Japanese).
10 Anderson, R. and R. May. 1992. Infectious Diseases of Humans: Dynamics and Control. Oxford University Press. Oxford, UK.
11 Bateman, I. J., R. T. Carson, B. Day, M. Hanemann, N. Hanley, T. Hett, M. Jones-Lee, G. Loomes, S. Mourato, E. Ozdemiroglu, D. W. Pearce, R. Sugden, and J. Swanson. 2002. Economic Valuation with Stated Preference Techniques: A Manual. Edward Elgar, Cheltenham, UK.
12 Bates, T. W., T. E. Carpenter, and M. C. Thurmond. 2003. Benefit-cost analysis of vaccination and preemptive slaughter as a means of eradicating foot-and mouth disease. Am. J. Vet. Res. 64:805-812.   DOI   ScienceOn
13 Zhang, H., H. Kono, H. Makita, and S. Kubota. 2014. An integrated epidemiological-economic analysis of HP-PRRS control strategies in Vietnam, Japanese J. Rural Econ. 16:57-64.
14 Wills, R. W., A. R. Doster, and F. A. Osorio. 2002. Transmission of porcine reproductive and respiratory syndrome virus (PRRSV) to age-matched sentinel pigs. J. Swine Health Prod. 10:161-165.
15 Zhang, H. and H. Kono. 2012. Economic impacts of porcine respective and respiratory syndrome (PRRS) outbreak in Vietnam pig production. Trop. Agric. Res. 23:152-159.
16 Zhang, H., H. Kono, S. Kubota, N. T. M. Hoa, and N. V. Hung. 2013. Epidemiologic and economic analysis of porcine HP-PRRS outbreak control in Vietnam. J. Agric. Dev. Stud. 23:31-42.
17 De Jong, M. C. M. 1995. Mathematical modeling in veterinary epidemiology: Why model building is important. Prev. Vet. Med. 25:183-193.   DOI   ScienceOn
18 Bennett, R. and K. Balcombe. 2012. Farmers' willingness to pay for a tuberculosis cattle vaccine. J. Agric. Econ. 63:408-424.   DOI   ScienceOn
19 Berentsen, P., A. Dijkhuizen, and A. Oskam. 1992. A dynamic model for cost-benefit analyses of foot-and-mouth disease control strategies. Prev. Vet. Med. 12:229-243.   DOI   ScienceOn
20 Charpin, C., S. Mahe, A. Keranflech, C. Belloc, R. Cariolet, M. F. Potier, and N. Rose. 2012. Infectiousness of pigs infected by the Porcine Reproductive and Respiratory Syndrome virus (PRRSV) is time-dependent. Vet. Res. 2012:43-69.
21 Dietze, K., J. Pinto, S. Wainwright, and C. Hamilton. 2011. Porcine reproductive and respiratory syndrome (PRRS): virulence jumps and persistent circulation in Southeast Asia. In Focus on..., 5, p. 8. Food and Agriculture Organization of the United Nations.
22 Greene, W. H. and D. A. Hensher. 2003. A latent class model for discrete choice analysis: Contrasts with mixed logit. Transp. Res.Part B. Methodol. 37:681-698.   DOI   ScienceOn
23 Hausman, J. and D. McFadden. 1984. Specification tests for the multinomial logit model. Econometrica. 52:1219-1240.   DOI   ScienceOn
24 Holtkamp, D., K. James, Z. Jeff, N. Eric, R. Hans, Y. Tiffany, W. Chong, Y. Paul, and H. Charles, 2012. Economic analysis of PRRS virus elimination from a herd. Iowa state university animal industry report 2012. http://www.ans.iastate.edu/report/air/2012pdf/R2678.pdf Accessed January 23, 2014.
25 Hitzhusen, F., B. Macgregor, and D. Southate. 1984. Private and social cost-benefit perspectives and a case application on reservoir sedimentation management. Water Int. 9:181-184.   DOI
26 Lanzas, C., S. Brien, R. Ivanek, Y. Lo, P. P. Chapagain, K. A. Ray, P. Ayscue, L. D. Warnick, and Y. T. Grohn. 2008. The effect of heterogeneous infectious period and contagiousness on the dynamics of Salmonella transmission in dairy cattle. Epidemiol. Infect. 136:1496-1510.   DOI   ScienceOn
27 An, T., Z. Tian, Y. Xiao, R. Li, J. Peng, T. Wei, Y. Zhang, Y. Zhou, and G. Tong. 2010. Origin of highly pathogenic porcine reproductive and respiratory syndrome virus, China. Emerg. Infect. Dis. 16:365-367.   DOI
28 Keeling, M. and P. Rohani. 2008. Modeling infectious disease in humans and animals. Princeton University Press, Princeton, NJ, USA.
29 Kermack, W. O. and A. G. McKendrick. 1927. A contribution to the mathematical theory of epidemics. Proc. R. Soc. (London) 115:700-721.   DOI
30 Lancaster, K. 1966. A new approach to consumer theory. J. Polit. Econ. 74:132-157.   DOI   ScienceOn
31 Lemke, U., B. Kaufmann, L. T. Thuy, K. Emrich, and A. Valle Zarate. 2006. Evaluation of smallholder pig production systems in North Vietnam: Pig production management and pig performances. Livest. Sci. 105:229-243.   DOI   ScienceOn
32 Lemke, U., M. Mergenthaler, R. Rossler, L. Huyen, P. Herold, B. Kaufmann, and A. Valle-Zarate. 2008. Pig production in Vietnam . A review. CAB Reviews: Perspectives in Agriculture, Veterinary Science, Nutrition and Natural Resources. 23:1-15.
33 Louviere, J., D. A. Hensher, and J. Swait. 2000. Stated Choice Methods: Analysis and Application. Cambridge University Press, Cambridge, UK.
34 McFadden, D. 1973. Conditional logit analysis of qualitative choice behavior. In: Frontiers in Econometrics (Ed. P. Zarembke). Academic Press, New York, USA. pp. 447-470.
35 McIntoch, E. and M. Ryan. 2002. Using discrete choice experiments to derive welfare estimates for the provision of elective surgery: Implications of discontinuous preferences. J. Econ. Psychol 23:367-382.   DOI   ScienceOn
36 McIntosh, E. 2006. Using discrete choice experiments within a cost-benefit analysis framework. Pharmacoeconomics 24:855-868.   DOI   ScienceOn
37 Zhuyiwang (Pig news). 2012. New attenuated PRRS vaccine is on sale. 27th May, 2009, (In Chinese). http://attenuatedcj.zhue.com.cn/jinrijujiao/qiyexinwen/shouyao/200905/27-72566.html Accessed November 21, 2012.