在土壤传播的虫中抗虫剂耐药性的生态进化动态
Swati Patel1, Kelsey Lyberger2, Carolin Vegvari3
1Department of Mathematics, Oregon State University, Corvallis, OR 97331, United States of America.
Theoretical population biology
|April 14, 2025
概括
寄生虫中的虫耐药性 (AR) 是一个日益严重的问题. 这项研究模拟了寄生虫生命周期和进化,以预测耐药性传播的速度,发现较低的繁殖和接触率加速了AR,而较低的幼虫死亡率减缓了AR.
科学领域:
- 寄生虫学的寄生虫学
- 进化生物学 进化生物学
- 数学建模的数学建模
背景情况:
- 虫耐药性 (AR) 是人类和牲畜寄生虫的一个重大问题.
- 对AR的证据在牲畜中比在人类中更为丰富,因此需要进一步调查导致的因素.
研究的目的:
- 开发一个生态进化模型,整合寄生虫生命周期和遗传耐药性进化.
- 确定关键治疗频率,以消除寄生虫群体,并对模型行为进行分类.
- 分析生命周期参数如何影响人类和牲畜感染物种的AR传播率.
主要方法:
- 开发了一种生态进化模型,其中包含单个双基因基因位点,用于药物耐药性.
- 计算的临界治疗频率,以在固定的药物疗效下消除种群.
- 在参数化的人类和牲畜寄生虫模型中分类模型行为和比较AR传播率.
主要成果:
- 在生态进化模型中确定了三个不同的定性行为.
- 发现较低的生育率和接触率通常会加速AR的传播,而较低的幼虫死亡率会减缓AR的传播.
- 确定Ancylostoma duodenale和Ostertagia circumcincta分别表现出最快和最慢的AR传播.
结论:
- 寄生虫生命周期特征显著影响抗甲虫药物耐药性等位基因传播的速度.
- 了解这些动态对于在人类和兽医中管理AR至关重要.
- 该模型为预测和潜在地减轻AR演变提供了一个框架.
相关概念视频
Antibiotic Selection
52.1K
Overview
52.1K
What is Natural Selection?
114.0K
Natural selection is an evolutionary process in which individuals with survival-promoting traits reproduce at higher rates. These favorable traits become more common within a population or species. Naturally selected traits initially arise via random genetic mutations. In order for selection to occur, there must be variation within a population, the trait controlling the variation must be heritable, and there must be an evolutionary advantage for variation in the trait.
114.0K
Epistasis
44.6K
In addition to multiple alleles at the same locus influencing traits, numerous genes or alleles at different locations may interact and influence phenotypes in a phenomenon called epistasis. For example, rabbit fur can be black or brown depending on whether the animal is homozygous dominant or heterozygous at a TYRP1 locus. However, if the rabbit is also homozygous recessive at a locus on the tyrosinase gene (TYR), it will have an unshaded coat that appears white, regardless of its TYRP1...
44.6K
Frequency-dependent Selection
21.7K
When the fitness of a trait is influenced by how common it is (i.e., its frequency) relative to different traits within a population, this is referred to as frequency-dependent selection. Frequency-dependent selection may occur between species or within a single species. This type of selection can either be positive—with more common phenotypes having higher fitness—or negative, with rarer phenotypes conferring increased fitness.
21.7K
Mutation, Gene Flow, and Genetic Drift
57.7K
In a population that is not at Hardy-Weinberg equilibrium, the frequency of alleles changes over time. Therefore, any deviations from the five conditions of Hardy-Weinberg equilibrium can alter the genetic variation of a given population. Conditions that change the genetic variability of a population include mutations, natural selection, non-random mating, gene flow, and genetic drift (small population size).
57.7K
Limits to Natural Selection
30.9K
Organisms that are well-adapted to their environment are more likely to survive and reproduce. However, natural selection does not lead to perfectly adapted organisms. Several factors constrain natural selection.
30.9K


