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| Author(s): |
Alfredo Javier Acosta Batallas
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | São Paulo. |
| Institution: | Universidade de São Paulo (USP). Faculdade de Medicina Veterinária e Zootecnia (FMVZ/SBD) |
| Defense date: | 2022-05-11 |
| Examining board members: |
Fernando Ferreira;
Marcos Amaku;
Jorge Caetano Junior;
Nicolas Cespedes Cardenas;
Luis Rodrigo Saa
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| Advisor: | Fernando Ferreira; Vitor Salvador Picão Gonçalves |
| Abstract | |
The evaluation of the epidemiological surveillance system is an essential process in the advancement of control and eradication plans, because the more sensitive, reliable and representative the system is, the better the understanding of the dynamics of the disease will be and the more effective will be the actions to control and eradicate it in a shorter period of time. The aim of this study was to evaluate the surveillance system for classical swine fever in Ecuador and to propose a risk-based surveillance model to support the process of eradicating the disease in the Country. For this purpose, we organized the study in 3 sections: (1) Descriptive evaluation with qualitative criteria and general efficiency parameters of the surveillance system, according to CDC recommendations. (2) Characterization of the production system by quantitative methods, evaluating the mechanisms governing the disease presentation process, and describing the production system and its interactions through animal movement, considering the spatial and temporal presentation of the disease and the evaluation of factors associated with risk. (3) Calculation of the sensitivity of the current surveillance system, in attention to the RiskSur recommendations, and finally comparing it with the risk-based proposal, applying scenario trees and considering the gain in sensitivity of the theoretical proposal. The results indicate that the veterinary service has the task of monitoring 144,000 registered establishments per year (an important contingent in the Andean region), 2.8 million pigs and a dynamic of 400,000 animal movements, in a scenario of low prevalence of the disease, which requires a qualitative improvement to achieve the goal of eradication. The proposed risk-based surveillance system contemplates improved effectiveness of the system, expressed as a 10% gain in sensitivity, which would only be possible in the conventional system if all its actions and components were increased by 30%. The use of better tools by the veterinary services, can positively impact the production chain and, consequently, the lives of thousands of producers. In conclusion, this study proposes an alternative to conventional surveillance, which, with the same resources, could allow the achievement of objectives culminating in the eradication of the disease in a shorter period of time. (AU) | |
| FAPESP's process: | 17/22912-2 - Evaluation of classical swine fever surveillance system in Ecuador, a risk-based surveillance system proposal |
| Grantee: | Alfredo Javier Acosta Batallas |
| Support Opportunities: | Scholarships in Brazil - Doctorate (Direct) |