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首页> 外文期刊>Journal of Parasitology >Effect of Age of the Intermediate Host Tribolium confusum (Coleoptera) on Infection by Hymenolepis diminuta (Cestoda)
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Effect of Age of the Intermediate Host Tribolium confusum (Coleoptera) on Infection by Hymenolepis diminuta (Cestoda)

机译：中间宿主Tribolium confusum（鞘翅目）的年龄对Hymenolepis diminuta（Cestoda）感染的影响

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摘要

A cross-sectional study of 27 cohorts of Tribolium confusum aged 2–78 wk was done to examine effects of host age on exposure to eggs of Hymenolepis diminuta under standardized conditions. Pre-exposure, fasting, and postexposure mortality were low, sex ratio was equal, and fecundity of hosts was high during the first 30 wk, followed by increasing mortality and male bias of the sex ratio, and declining fecundity, in older beetles. These changes in the host were not associated with pronounced changes in infection results. Prevalence of infection was higher in females than males, but was unaffected by age in both sexes. Intensity of infection was similar between sexes in beetles up to 30 wk old, and thereafter declined in females, but not in males. Age-related changes in hosts were gradual, but unexpected levels of short-term variation in infection results suggest that some undetermined proximate factors may override general host age effects on the infection process.
机译：进行了一项针对27个2至78周周龄的Tribolium confusum队列的横断面研究，以检查宿主年龄对标准化条件下暴露于Hymenolepis diminuta卵的影响。暴露前的30周内，暴露前，禁食和暴露后的死亡率低，性别比相等且宿主的生殖力高，随后，年龄较大的甲虫的死亡率和男性偏向性增加，生殖力下降。宿主的这些变化与感染结果的明显变化无关。女性的感染率高于男性，但男女均不受年龄的影响。在30周龄以下的甲虫中，雌雄之间的感染强度相似，此后雌性下降，而雄性下降。宿主的年龄相关变化是渐进的，但感染结果的短期变化出乎意料的水平表明，一些不确定的近因可能会覆盖宿主总体年龄对感染过程的影响。

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