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首页> 外文期刊>Journal of Medical Entomology >How do Nutritional Stress and La Crosse Virus Infection Interact? Tests for Effects on Willingness to Blood Feed and Fecundity in Aedes albopictus (Diptera: Culicidae)
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How do Nutritional Stress and La Crosse Virus Infection Interact? Tests for Effects on Willingness to Blood Feed and Fecundity in Aedes albopictus (Diptera: Culicidae)

机译：营养压力与拉克罗斯病毒感染如何相互作用？对白纹伊蚊（Diptera：Culicidae）的采血意愿和生殖力的影响的测试

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Evolutionary theory predicts that vector-borne pathogens should have low virulence for their vector because of selection against pathogens that harm the vector sufficiently to reduce transmission. Environmental factors such as nutritional stress can alter vector-pathogen associations by making the vectors more susceptible to pathogens (condition-dependent competence) and vulnerable to the harm caused by pathogen replication (condition-dependent virulence). We tested the hypotheses of condition-dependent competence and condition-dependent virulence by examining the interactive effects of short-term sugar deprivation and exposure to La Crosse virus (LACV) in female Aedes albopictus (Skuse). We predicted that infection status interacts with sugar deprivation to alter willingness to blood feed and fecundity in the second gonotrophic cycle (condition-dependent virulence). Sugar deprivation had no effect on body infection or disseminated infection rates. Infection status, sugar treatment, and their interaction had no effect on fecundity. Mosquitoes that had intermittent access to sugar were significantly more willing to take a second bloodmeal compared with those that had continuous access to sugar. Infection status and the interaction with sugar treatment had no effect on blood-feeding behavior. Thus, we found no evidence of short-term sugar deprivation leading to condition-dependent competence for, or condition-dependent virulence of, LACV in Ae. albopictus.
机译：进化理论预测，媒介传播的病原体对其媒介应具有低毒力，因为选择了足以破坏媒介以减少传播的病原体。营养胁迫等环境因素可通过使载体更易于感染病原体（条件依赖性能力）和易受病原体复制所造成的伤害（条件依赖性毒力）来改变载体-病原体的关联。我们通过检查女性白纹伊蚊（Skuse）中短期糖剥夺和接触拉克罗斯病毒（LACV）的相互作用，检验了条件依赖性能力和条件依赖性毒力的假设。我们预测感染状态与糖剥夺相互作用，以改变第二个非营养周期（条件依赖性毒力）的采血意愿和生殖力。缺糖对身体感染或传播感染率没有影响。感染状况，糖处理及其相互作用对生育能力没有影响。与持续获取糖分的蚊子相比，间歇获取糖分的蚊子更愿意第二次进餐。感染状态以及与糖处理的相互作用对采血行为没有影响。因此，我们没有发现短期糖剥夺导致Ae中LACV的条件依赖性能力或条件依赖性毒力的证据。白化病。

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