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首页> 外文期刊>Journal of Medical Entomology >Infection Prevalence, Bacterial Loads, and Transmission Efficiency in Oropsylla montana (Siphonaptera: Ceratophyllidae) One Day After Exposure to Varying Concentrations of Yersinia pestis in Blood
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Infection Prevalence, Bacterial Loads, and Transmission Efficiency in Oropsylla montana (Siphonaptera: Ceratophyllidae) One Day After Exposure to Varying Concentrations of Yersinia pestis in Blood

机译：暴露于血液中不同浓度的鼠疫耶尔森菌后一天，在蒙太奇菌（Siropaptera：Ceratophyllidae）中的感染流行率，细菌载量和传播效率

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摘要

Unblocked fleas can transmit Yersinia pestis, the bacterium that causes plague, shortly (= 4 d) after taking an infectious bloodmeal. Investigators have measured so-called early-phase transmission (EPT) efficiency in various fleas following infection with highly bacteremic blood (>= 10(8) cfu/ml). To date, no one has determined the lower limit of bacteremia required for fleas to acquire and transmit infection by EPT, though knowing this threshold is central to determining the length of time a host may be infectious to feeding fleas. Here, we evaluate the ability of Oropsylla montana (Baker) to acquire and transmit Y. pestis after feeding on blood containing 10(3) to 10(9) cfu/ml. We evaluated the resulting infection prevalence, bacterial loads, and transmission efficiency within the early-phase time period at 1 d postinfection. Fleas acquired infection from bacteremic blood across a wide range of concentrations, but transmission was observed only when fleas ingested highly bacteremic blood.
机译：畅通无阻的跳蚤可在感染性血粉摄入后不久（<= 4 d）传播鼠疫耶尔森菌。研究人员已测量了感染高细菌性血液（> = 10（8）cfu / ml）后各种跳蚤中所谓的早期传播（EPT）效率。迄今为止，还没有人确定跳蚤通过EPT获得和传播感染所需的菌血症下限，尽管知道这一阈值对于确定宿主感染跳蚤的时间长短至关重要。在这里，我们评估食用含10（3）至10（9）cfu / ml的血液后，山楂（Oropsylla montana）（Baker）获得和传播鼠疫耶尔森菌的能力。我们评估了感染后1 d早期阶段的感染率，细菌载量和传播效率。跳蚤在很宽的浓度范围内都从细菌性血液中感染，但是只有在跳蚤摄入高度细菌性血液时才能观察到传播。

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