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  1. 561
    “…Spotted fever group (SFG) rickettsiosis is caused by obligatory intracellular Gram‐negative bacteria that belong to the genus Rickettsia. Ticks belonging to the family Ixodidae can act as vectors, reservoirs or amplifiers of SFG rickettsiae. …”
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    Seroprevalence of spotted fever group (SFG) rickettsiae infection in domestic ruminants in Khartoum State, Sudan
  2. 562
    “…One variable component of Rickettsia biology involves arthropod vectors: for instance, typhus group rickettsiae are principally vectored by insects (i.e., lice and fleas), whereas spotted fever group rickettsiae are exclusively vectored by ticks. …”
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    The Cat Flea (Ctenocephalides felis) Immune Deficiency Signaling Pathway Regulates Rickettsia typhi Infection
  3. 563
    “…Rickettsia aeschlimannii and R. africae were the main Rickettsia spp. detected in the tick pools sequenced. …”
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    The Detection of Spotted Fever Group Rickettsia DNA in Tick Samples From Pastoral Communities in Kenya
  4. 564
    “…Rickettsia felis is a human pathogen transmitted by the cat flea, Ctenocephalides felis (Bouché) (str. …”
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    Effect of Rickettsia felis Strain Variation on Infection, Transmission, and Fitness in the Cat Flea (Siphonaptera: Pulicidae)
  5. 565
    “…The rickettsiae are obligate intracellular alphaproteobacteria that exhibit a complex infectious life cycle in both arthropod and mammalian hosts. …”
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    A streamlined method for transposon mutagenesis of Rickettsia parkeri yields numerous mutations that impact infection
  6. 566
    “…BACKGROUND: With a prevalence of 4.7–13% in Danish Ixodes ricinus ticks, Rickettsia helvetica is one of the most frequently detected tick-borne organisms in Denmark. …”
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    Evidence of rickettsiae in Danish patients tested for Lyme neuroborreliosis: a retrospective study of archival samples
  7. 567
    “…We demonstrated successful detection of Rickettsia typhi DNA by a nested qPCR specific to prsA in 2 patients. …”
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    Rickettsia typhi as Cause of Fatal Encephalitic Typhus in Hospitalized Patients, Hamburg, Germany, 1940–1944
  8. 568
    “…The draft genome showed 36.01% similarity with that of Rickettsia monacensis strain IrR/Munich (NCBI accession number LN794217), 37.81% similarity with that of Rickettsia heilongjiangensis 054 (NCBI accession number CP002912), and 43.88% similarity with that of Rickettsia tamurae AT-1 (NCBI accession number CCMG01000001).…”
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    Genome Sequence of “Candidatus Rickettsia colombianensi,” a Novel Tick-Associated Bacterium Distributed in Colombia
  9. 569
    “…Mediterranean spotted fever develops from an infection with Rickettsia conorii, an obligate intracellular, Gram-negative, endotheliotropic, and tick-transmitted bacterial pathogen, and is an acute, febrile illness that can progress to life-threatening complications if not diagnosed and treated early with effective antibiotics. …”
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    Global Transcriptomic Profiling of Pulmonary Gene Expression in an Experimental Murine Model of Rickettsia conorii Infection
  10. 570
    “…Infection of dogs with Rickettsia spp. can result in inapparent, mild, or severe disease. …”
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    Exposure of dogs to Rickettsia spp. in Costa Rica: Risk factors for PCR-positive ectoparasites and seropositivity
  11. 571
    “…All of the 68 pools of A. americanum had molecular evidence of the spotted fever group rickettsia, Rickettsia amblyommatis. Additionally, six (8.82%) of the A. americanum pools contained sequences matching Ehrlichia chaffeensis, the pathogen responsible for human monocytotropic ehrlichiosis, and 11 (16.18%) for E. ewingii. …”
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    Detection of Rickettsiae, Borreliae, and Ehrlichiae in Ticks Collected from Walker County, Texas, 2017–2018
  12. 572
    “…The clinical features of spotted fever group (SFG) Rickettsia induced disease range from a mild to severe illness. …”
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    New Spotted Fever Group Rickettsia Isolate, Identified by Sequence Analysis of Conserved Genomic Regions
  13. 573
    “…Flea-borne (murine) typhus is caused by Rickettsia typhi. Infection in pregnant women can lead to adverse outcomes when diagnosis and treatment is delayed. …”
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    Successful Detection of Unrecognized Rickettsia typhi in Pregnancy Using Cell-Free Next-Generation Sequencing
  14. 574
    “…Murine typhus, caused by the obligate intracellular bacterium Rickettsia typhi, remains a severe disease in humans. …”
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    Risk1, a Phosphatidylinositol 3-Kinase Effector, Promotes Rickettsia typhi Intracellular Survival
  15. 575
    “…Spotted fever group Rickettsia (SFGR) is one among the aetiologies that cause fever of unknown origin in Angola. …”
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    Serological Evidence of Rickettsia Exposure among Patients with Unknown Fever Origin in Angola, 2016-2017
  16. 576
    “…BACKGROUND: Pathogenic Rickettsia species belonging to the spotted fever group are arthropod-borne, obligate intracellular bacteria which exhibit preferential tropism for host microvascular endothelium in the mammalian hosts, resulting in disease manifestations attributed primarily to endothelial damage or dysfunction. …”
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    Comparative transcriptomic analysis of Rickettsia conorii during in vitro infection of human and tick host cells
  17. 577
    “…Rocky Mountain spotted fever (RMSF) is a life-threatening tick-borne disease caused by Rickettsia rickettsii, which is widely distributed throughout the Americas. …”
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    Comparative Analysis of Infection by Rickettsia rickettsii Sheila Smith and Taiaçu Strains in a Murine Model
  18. 578
    “…Rickettsia typhi and Bartonella henselae are the causative agents of murine typhus and cat-scratch disease, respectively. …”
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    Serosurvey of IgG Antibodies against Bartonella henselae and Rickettsia typhi in the Population of Attica, Greece
  19. 579
    “…One Amblyomma americanum tick contained Rickettsia amblyommatis, while Rickettsia felis was found in one Dermacentor variablis tick, serving as the first report of Rickettsia felis in a tick in this region and within this tick vector. …”
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    Presence of Rickettsia Species in Ticks Collected from Companion Animals in Northeastern Georgia, United States
  20. 580
    “…BACKGROUND: Rickettsial diseases associated with the spotted fever group constitute a growing number of newly identified Rickettsia pathogens and their tick vectors in various parts of the world. …”
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    First report of the molecular detection of human pathogen Rickettsia raoultii in ticks from the Republic of Korea
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