Instituto de Defesa Agropecuária do Estado de Mato Grosso (INDEA MT), Cuiabá, MT, Brazil.
Department of Animal Health, Ministry of Agriculture, Livestock and Food Supply, Brasília, DF, Brazil.
Prev Vet Med. 2023 Sep;218:105992. doi: 10.1016/j.prevetmed.2023.105992. Epub 2023 Aug 9.
From 2001, due to the launching of the National Program for the Control and Eradication of Brucellosis and Tuberculosis, Brazil began a series of studies aimed at the epidemiological characterization of bovine brucellosis in its federative units. In the state of Mato Grosso, studies conducted in 2003 and 2014 showed a reduction in the prevalence of infected herds from 41.2 % to 24 % and in the prevalence of seropositive animals from 10.2 % to 5.1 %. These results stemmed from the efficient heifer vaccination program with S19 implemented by the state. From this scenario, the present study quantified and compared the benefits and costs of bovine brucellosis control in the state through a financial analysis. When considering private and public costs, the Net Present Value (NPV) was estimated at US$ 37.5 million, the Internal Rate of Return (IRR) was calculated at 31 %, and the Benefit-Cost Ratio (BCR) was 2.3. When considering only the private costs, the NPV was US$ 51.3 million, the IRR was 46 % and the BCR was 3.43, indicating that the cattle producer in Mato Grosso had a return of US$ 3.43 for each US$ 1.00 invested. Therefore, the bovine brucellosis control actions carried out in the state of Mato Grosso between 2003 and 2014 were highly advantageous from the economic point of view. The most rational way to continue decreasing bovine brucellosis prevalences at low cost in the state is to maintain the heifer vaccination program, using the RB51 vaccine in addition to S19.
自 2001 年以来，由于国家布鲁氏菌病和结核病控制和根除计划的启动，巴西开始了一系列旨在对其联邦单位的牛布鲁氏菌病进行流行病学特征描述的研究。在马托格罗索州，2003 年和 2014 年进行的研究表明，受感染牛群的流行率从 41.2%降至 24%，血清阳性动物的流行率从 10.2%降至 5.1%。这些结果源于该州实施的 S19 高效小母牛疫苗接种计划。从这种情况出发，本研究通过财务分析量化和比较了该州控制牛布鲁氏菌病的收益和成本。当考虑私人和公共成本时，净现值（NPV）估计为 3750 万美元，内部收益率（IRR）为 31%，效益成本比（BCR）为 2.3。当仅考虑私人成本时，NPV 为 5130 万美元，IRR 为 46%，BCR 为 3.43，这表明马托格罗索州的牛场主每投资 1 美元可获得 3.43 美元的回报。因此，从经济角度来看，马托格罗索州在 2003 年至 2014 年期间开展的牛布鲁氏菌病控制行动具有高度优势。在该州以低成本继续降低牛布鲁氏菌病流行率的最合理方法是维持小母牛疫苗接种计划，除 S19 外还使用 RB51 疫苗。
