玻利维亚的口病:基于模拟的对抗策略和疫苗接种要求的评估
Nicolas C Cardenas1, Diego Viali Dos Santos2, Daniel Magalhães Lima2
1Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA.
Transboundary and emerging diseases
|October 6, 2025
概括
在玻利维亚有效控制口病 (FMD) 需要将环状疫苗接种与人口减少相结合. 这一综合战略显著减少了疫情的持续时间和传播,超过了单独的疫苗接种或人口减少.
科学领域:
- 兽医流行病学 兽医流行病学
- 疾病建模 疾病建模
- 公共卫生 公共卫生
背景情况:
- 口病 (FMD) 构成了全球畜牧业的重大威胁.
- 了解口病传播动态对于有效的国家应对计划至关重要.
- 玻利维亚的农业部门容易受到口热疫情的影响.
研究的目的:
- 开发和利用一个随机的SEIR元人口模型来模拟玻利维亚的口热疫情.
- 评估各种国家应对战略对口病传播的影响.
- 确定高风险地区,估计病控制的疫苗接种需求.
主要方法:
- 开发一个随机易受-暴露-感染-恢复 (SEIR) 的超人口模型.
- 在不同的控制策略下模拟口热疫情,包括疫苗接种,移动禁令和人口减少.
- 对疫情持续时间,控制疫情的百分比和接种疫苗的动物数量进行分析.
主要成果:
- 结合环状疫苗接种 (50-90个农场/天) 和人口减少 (3-5个农场/天) 控制了62.9%的疫情,与较低的人口减少率相比,持续时间减少了9天.
- 仅靠人口减少,就控制了56.76%的疫情,平均持续时间为63天.
- 最有效的策略涉及密集疫苗接种 (25-45个农场/天) 与人口减少 (6-7个农场/天) 相结合,在平均3天内消除疫情,需要平均925,338次疫苗接种.
- 疫苗接种本身在很大程度上是无效的,只控制了0.6%的疫情.
结论:
- 单靠环状疫苗接种不足以消除玻利维亚的口病.
- 将人口减少与疫苗接种相结合,大大缩短了口热疫情的持续时间.
- 波托西,科查班巴和拉巴斯等高密度农业地区被确定为高风险地区,需要采取有针对性的口病控制措施.
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