Unit of Clinical Bacteriology, Dept. of Medical Sciences, Uppsala University, Uppsala, Sweden.
Ticks Tick Borne Dis. 2012 Apr;3(2):100-6. doi: 10.1016/j.ttbdis.2011.11.003. Epub 2012 Jan 9.
A total of 887 adult Ixodes ricinus ticks (469 females and 418 males) from 29 different localities in Sweden were screened for Rickettsia, Anaplasma, and Coxiella DNA using PCR and then subjected to gene sequencing. Rickettsial DNA was detected in 9.5-9.6% of the ticks. Most of the positive ticks were infected with Rickettsia helvetica. One tick harbored another spotted fever rickettsia, closely related to or identical with R. sibirica not previously found in I. ricinus nor in Sweden. Six of the ticks (0.7%) were infected with an Anaplasma sp., presumably A. phagocytophilum. Coxiella burnetii DNA was not detected in any of the ticks. The detection of R. helvetica and A. phagocytophilum in several of the localities sampled suggests that these potentially human-pathogenic agents are common in Sweden.
总计 887 只来自瑞典 29 个不同地区的成年硬蜱（469 只雌性和 418 只雄性），通过 PCR 筛选出了携带立克次氏体、无形体和柯克斯体的 DNA，并进行了基因测序。9.5-9.6%的蜱虫中检测到了立克次氏体 DNA。大多数阳性蜱虫感染了瑞士立克次氏体。一只蜱虫携带另一种斑点热立克次体，与先前在硬蜱或瑞典都未发现的西伯利亚立克次体密切相关或相同。6 只蜱虫（0.7%）感染了一种无形体，可能是嗜吞噬细胞无形体。任何蜱虫中都未检测到柯克斯体。在采样的几个地区都检测到了瑞士立克次氏体和嗜吞噬细胞无形体，这表明这些潜在的人类病原体在瑞典很常见。
