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Dose-Response Models for Eastern US, Western US and Venezuelan Equine Encephalitis Viruses in Mice - Part II: Quantification of the Effects of Host Age on the Dose Response.
Microbial Risk Analysis ( IF 2.8 ) Pub Date : 2018-03-30 , DOI: 10.1016/j.mran.2018.02.003
Mark H Weir 1, 2 , Alexis L Mraz 1 , Sharon Nappier 3 , Charles N Haas 4
Affiliation  

Many infectious disease hazards demonstrate higher susceptibility with regards to younger host ages. This trend of increased susceptibility with decreasing host age can also lead to an increased likelihood of mortality, and prolonged/chronic health effects. For quantitative microbial risk assessment (QMRA) modeling, the ability to quantify the effect of host age in the dose response model can allow modelers to account for these effects mechanistically. Additionally, QMRA modelers using age-dependent dose response models can model entire populations within the dose-response itself rather than modeling age ranges using susceptibility factors. This research developed host-age dependent exponential and beta Poisson dose response models for Eastern, Western and Venezuelan encephalitis viruses (EEV, WEV and VEV respectively) for two routes – intracranial and intraperitoneal. Improvement in fit was statistically tested as a means of assessing the benefit of including age dependency into the dose response models. EEV demonstrated improvement in fit using host-age dependency only for the exponential model except for intracranial exposure. EEV demonstrated an improvement in fit when using age dependency in the beta Poisson dose response model for both exposure routes. VEV demonstrated an improvement in fit using age dependency for both exposure routes. WEV demonstrated an improvement in fit for intracranial exposure, but neither of the age dependent dose-response models provided a good fit for WEV intraperitoneal exposure.



中文翻译:

美国东部,美国西部和委内瑞拉马脑炎病毒在小鼠中的剂量反应模型-第II部分:宿主年龄对剂量反应的影响的量化。

对于年轻的寄主年龄,许多传染病危害表现出较高的易感性。易感性随寄主年龄的降低而增加的趋势也可能导致死亡的可能性增加,以及长期/慢性健康影响。对于定量微生物风险评估(QMRA)建模,在剂量反应模型中量化宿主年龄影响的能力可以使建模人员从机械角度考虑这些影响。此外,使用年龄依赖性剂量反应模型的QMRA建模人员可以在剂量反应本身内对整个人群进行建模,而不是使用敏感性因子对年龄范围进行建模。这项研究针对东部,西部和委内瑞拉脑炎病毒(EEV,WEV和VEV)分别用于两种途径-颅内和腹膜内。对适应性的改善进行了统计学测试,以评估将年龄依赖性纳入剂量反应模型的益处。EEV证明,除了颅内暴露外,仅对指数模型使用宿主年龄依赖性可以改善适应性。当在两种暴露途径的β泊松剂量反应模型中使用年龄依赖性时,EEV都显示出适应性的改善。在两种暴露途径中,使用年龄依赖性,VEV都显示出适应性的改善。WEV证明适合颅内暴露,但年龄依赖性剂量反应模型均不能很好地适应WEV腹腔暴露。对适应性的改善进行了统计学测试,以评估将年龄依赖性纳入剂量反应模型的益处。EEV证明,除了颅内暴露外,仅对指数模型使用宿主年龄依赖性可以改善适应性。当在两种暴露途径的β泊松剂量反应模型中使用年龄依赖性时,EEV都显示出适应性的改善。在两种暴露途径中,使用年龄依赖性,VEV都显示出适应性的改善。WEV证明适合颅内暴露,但年龄依赖性剂量反应模型均不能很好地适应WEV腹腔暴露。对适应性的改善进行了统计学测试,以评估将年龄依赖性纳入剂量反应模型的益处。EEV证明,除了颅内暴露外,仅对指数模型使用宿主年龄依赖性可以改善适应性。当在两种暴露途径的β泊松剂量反应模型中使用年龄依赖性时,EEV都显示出适应性的改善。在两种暴露途径中,使用年龄依赖性,VEV都显示出适应性的改善。WEV证明适合颅内暴露,但年龄依赖性剂量反应模型均不能很好地适应WEV腹腔暴露。当在两种暴露途径的β泊松剂量反应模型中使用年龄依赖性时,EEV都显示出适应性的改善。在两种暴露途径中,使用年龄依赖性,VEV都显示出适应性的改善。WEV证明适合颅内暴露,但年龄依赖性剂量反应模型均不能很好地适应WEV腹腔暴露。当在两种暴露途径的β泊松剂量反应模型中使用年龄依赖性时,EEV都显示出适应性的改善。在两种暴露途径中,使用年龄依赖性,VEV都显示出适应性的改善。WEV证明适合颅内暴露,但年龄依赖性剂量反应模型均不能很好地适应WEV腹腔暴露。

更新日期:2018-03-30
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