title: Vector competence of the tick Ixodes sinensis (Acari: Ixodidae) for Rickettsia monacensis.
abstract: BACKGROUND
  Cases of Mediterranean Spotted Fever like rickettsioses, caused by Rickettsia monacensis, have become more common in the last 10 years. In China, natural infection of R. monacensis in various tick species has been confirmed but the vector(s) of R. monacensis have not been recorded.
  
  
  METHODS
  The prevalence of R. monacensis in >1500 Ixodidae ticks from central and southern China was determined using centrifugation-shell vial culture and polymerase chain reaction techniques. The predominant species, Ixodes sinensis, harbored a natural infection of R. monacensis and was assumed to be a vector candidate of R. monacensis. Experimental transmissions were initialized by infecting Rickettsia-free tick colonies with R. monacensis using capillary tube feeding (CTF) or immersion techniques. Transstadial and transovarial transmissions, and transmission from ticks to mice, were conducted under laboratory conditions.
  
  
  RESULTS
  R. monacensis was isolated and identified from hemolymph of Ixodes sinensis using molecular techniques. Transovarial transmission of R. monacensis from infected ♀I. sinensis to offspring was documented and infected offspring successfully passed Rickettsia to mice. Transstadial transmission rates were 58% in larva to nymph and 56% in nymph to adult stages. Infected nymphs and adults were also able to infect mice.
  
  
  CONCLUSIONS
  I. sinensis is a competence vector for R. monacensis as demonstrated by natural infection and transmission studies.
authors.affiliation: State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology & Epidemiology, No. 20 Dongdajie Str. Fengtai District, Beijing, People Republic of China. jdjkyxd@126.com.|Centre for Disease Control and Prevention of Jindong, No.295 Jiangjun Road, Jinhua, Zhejiang province, People Republic of China. jdjkyxd@126.com.
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Ye
authors.affiliation: State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology & Epidemiology, No. 20 Dongdajie Str. Fengtai District, Beijing, People Republic of China. sunyi73@gmail.com.
authors.forename: Yi
authors.initials: Y
authors.lastname: Sun
authors.affiliation: Center for Health Inspection, Heilongjiang Bureau of Entry & Exit Inspection and Quarantine, No.9 Ganshui Road, Harbin, People Republic of China. juwend@163.com.
authors.forename: Wendong
authors.initials: W
authors.lastname: Ju
authors.affiliation: Center for Disease Control and Prevention of Wenzhou, No. 59 Yingdaoguan Rd., Lucheng District, Wenzhou, Zhejiang province, People Republic of China. 766808560@qq.com.
authors.forename: Xin
authors.initials: X
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology & Epidemiology, No. 20 Dongdajie Str. Fengtai District, Beijing, People Republic of China. Caowc@bmi.ac.cn.
authors.forename: Wuchun
authors.initials: W
authors.lastname: Cao
authors.affiliation: State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology & Epidemiology, No. 20 Dongdajie Str. Fengtai District, Beijing, People Republic of China. jscyxkc@126.com.
authors.forename: Mingyu
authors.initials: M
authors.lastname: Wu
mesh_terms: D000818:Animals; D001096:Arachnid Vectors / Q000382:microbiology* / Q000502:physiology; D005260:Female; D018884:Ixodes / Q000382:microbiology*; D008018:Life Cycle Stages; D008297:Male; D051379:Mice; D010802:Phylogeny; D012281:Rickettsia / Q000145:classification* / Q000235:genetics / Q000502:physiology; D012282:Rickettsia Infections / Q000382:microbiology / Q000635:transmission*