在加利福尼亚北部的淡水溪流蜗牛（椎实螺科：Juga属）中检测到波托马克马热病原体里氏埃立克体。
Detection of Ehrlichia risticii, the agent of Potomac horse fever, in freshwater stream snails (Pleuroceridae: Juga spp.) from northern California.
作者信息
Barlough J E, Reubel G H, Madigan J E, Vredevoe L K, Miller P E, Rikihisa Y
机构信息
Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California, Davis, California 95616, USA.
出版信息
Appl Environ Microbiol. 1998 Aug;64(8):2888-93. doi: 10.1128/AEM.64.8.2888-2893.1998.
Abstract
Ehrlichia DNA was identified by nested PCR in operculate snails (Pleuroceridae: Juga spp.) collected from stream water in a northern California pasture in which Potomac horse fever (PHF) is enzootic. Sequencing of PCR-amplified DNA from a suite of genes (the 16S rRNA, groESL heat shock operon, 51-kDa major antigen genes) indicated that the source organism closely resembled Ehrlichia risticii, the causative agent of PHF. The minimum percentage of Juga spp. harboring the organism in the population studied was 3.5% (2 of 57 snails). No ehrlichia DNA was found in tissues of 123 lymnaeid, physid, and planorbid snails collected at the same site. These data suggest that pleurocerid stream snails may play a role in the life cycle of E. risticii in northern California.
摘要
通过巢式聚合酶链反应（PCR），在从加利福尼亚州北部一处波托马克马热（PHF）为地方病的牧场溪流中采集的有盖螺（椎实螺科：Juga属）中鉴定出了埃立克体DNA。对一组基因（16S核糖体RNA、groESL热休克操纵子、51 kDa主要抗原基因）的PCR扩增DNA进行测序表明，源生物体与PHF病原体里氏埃立克体极为相似。在所研究的群体中，携带该生物体的Juga属螺的最低比例为3.
5%（57只螺中有2只）。在同一地点采集的123只椎实螺科、瓶螺科和平卷螺科螺的组织中未发现埃立克体DNA。这些数据表明，椎实螺科溪流螺可能在加利福尼亚州北部里氏埃立克体的生命周期中发挥作用。
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