“…Among TBPs, five Anaplasma, two Ehrlichia, two Rickettsia, five Theileria, two Babesia, and one Coxiella species are the major pathogens in both livestock and humans. …”
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“…BACKGROUND: Brazilian spotted fever (BSF), the most lethal tick-borne disease in the Western Hemisphere, is caused by the bacterium Rickettsia rickettsii and transmitted by the bite of Amblyomma sculptum. …”
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“…Participants included patients with an ICD-10 diagnosis code of spotted fever group rickettsiosis or ehrlichiosis and a positive Rickettsia rickettsii or Ehrlichia indirect immunofluorescence assay immunoglobulin G antibody test result. …”
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“…Anaplasma phagocytophilum, A. ovis, A. centrale, Babesia ovis, Borrelia spp., Rickettsia spp., R. massiliae, Bartonella spp. and Hepatozoon spp. were also detected. …”
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“…RESULTS: Six ticks (1.7%) were infected with tick-borne encephalitis virus (TBEV); 171 (49.4%), with B. burgdorferi sensu lato; 17 (4.9%), with B. miyamotoi; 47 (13.6%), with Anaplasma phagocytophilum; and 56 (16.2%), with Ehrlichia sp. Neither Rickettsia sibirica nor R. heilongjiangensis were detected. …”
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“…The testicular swelling characteristic of Mexican typhus and showing the above mentioned bodies—probably Rickettsia—may be absent in individual guinea pigs under ordinary conditions and in guinea pigs inoculated by other than the intraperitoneal route. …”
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“…In the case of our patient, both spirochete and rickettsia are bacterial tick-borne illness which are undetected by standard cultures. …”
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“…The administration of penicillin in relatively large but non-toxic doses to dba mice after injection with murine typhus rickettsiae resulted in a marked reduction in mortality, particularly when the initial dosage of rickettsiae was relatively small, approaching the minimal lethal dose. …”
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“…To determine the usefulness of noninvasive cutaneous swab specimens for detecting rickettsiae, we tested skin eschars from 6 guinea pigs and from 9 humans. …”
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“…Our experiments have shown that the Mooser bodies or Rickettsiae derived from guinea pigs with Mexican typhus fever can survive in bedbugs after intra-coelomic injection for 10 days, remaining capable of infection. …”
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“…Of patients assessed, 8.9%, 22.4%, 1.1%, and 3.6% had enhanced seroreactivity to Coxiella burnetii, spotted fever group rickettsiae, typhus group rickettsiae, and scrub typhus group orientiae, respectively.…”
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“…The dog tick Rhipicephalus sanguineus and the camel tick Hyalomma dromedarii play important roles as vectors and reservoirs of Rickettsiae. The aim of this study was to determine the prevalence of Rickettsiae in ixodid ticks species infesting dogs and camels in Egypt, in addition to, the morphological and molecular identification of R. sanguineus and H. dromedarii. …”
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“…In spite of this, and of the extensive research carried out, many aspects of the biology and epidemiology of tick-borne rickettsiae are far from being completely understood. …”
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“…This article examines the common features of the host-pathogen relationship and of the arthropod vectors of the typhus and spotted fever group rickettsiae.…”
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“…A strain of European typhus (Breinl) has been carried in cultures by means of successive transfers for a period of 1½ years, the rickettsiae in such cultures being quite as numerous as in similar cultures of murine strains of typhus. 2. …”
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“…The incubation period in guinea pigs after intraperitoneal inoculation depends largely on the number of Rickettsiae injected.…”
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“…BACKGROUND: The order Rickettsiales comprises Gram-negative obligate intracellular bacteria (also called rickettsias) that are mainly associated with arthropod hosts. …”
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“…The microbial causes of human disease include viruses, chlamydiae, rickettsiae, mycoplasmas, bacteria, fungi, and protozoa. …”
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“…There is also a wider distribution of Rickettsiae and a concentration of organisms which, in pleural and peritoneal exudates, amounts to almost cultural proportions. …”
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“…We report 3 cases of Queensland tick typhus (QTT) and 1 case of African tick bite fever in which the causative rickettsiae were detected by PCR of eschar and skin lesions in all cases. …”
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