病原生物的发育同步和异常繁殖率
Megan A Greischar1, Lauren M Childs2,3,4
1Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY 14853, USA.
概括
估计病原体的繁殖率对于了解疾病至关重要. 由于采样偏差,常见的方法可能会高估真实率,影响我们对感染动态的理解.
科学领域:
- 微生物学 微生物学
- 传染病的动态传染病的动态.
- 寄生虫学的寄生虫学
背景情况:
- 准确估计致病生物的繁殖率对于了解疾病进展,免疫反应和治疗疗效至关重要.
- 之前的研究表明,用于推断疟疾寄生虫的繁殖率的标准方法高估了真实值.
- 目前尚不清楚这种偏见是针对疟疾的,还是跨病原体的更广泛问题.
研究的目的:
- 调查偏差的增殖率估计是否是各种病原生物的普遍问题.
- 将宿主内部模型概括为探索发育生物学对速率估计的影响.
- 识别导致病原体生长率高估或低估的因素.
主要方法:
- 将宿主疟疾模型一般化,以适应不同的病原体发育生物学.
- 模拟发育抽样偏差和人口同步的各种模式.
- 分析这些因素对病原体丰富度和繁殖率的推断折叠变化的影响.
主要成果:
- 发育性抽样偏差,即随着年龄的增长而改变检测能力,始终导致过度估计病原体丰度.
- 这种偏见掩盖了真正的增长率,甚至可以掩盖人口是否在增长或下降.
- 当人口同步度随着时间的推移而下降时,会发生高估;同步度的增加会导致低估.
结论:
- 偏差的增殖率估计是致病生物的广泛关注,不仅限于疟疾.
- 考虑到人口同步和发育抽样偏差的不同模式,对于准确的增长率确定至关重要.
- 对病原体繁殖率的可靠估计需要包含人口动态和发育阶段的检测能力变化的模型.
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