| rickettsia raoultii sp. nov., a spotted fever group rickettsia associated with dermacentor ticks in europe and russia. | we describe the characterization of a novel rickettsia species cultivated from dermacentor ticks collected in russia and france, for which we propose the name rickettsia raoultii sp. nov. using multigene sequencing, we demonstrated that five rickettsial isolates from dermacentor silvarum, dermacentor reticulatus, dermacentor marginatus and dermacentor nuttalli ticks were classified within this novel spotted fever rickettsia species. this rickettsia also exhibited a serotype distinct from previou ... | 2008 | 18599708 |
| ricka expression is not sufficient to promote actin-based motility of rickettsia raoultii. | rickettsia raoultii is a novel rickettsia species recently isolated from dermacentor ticks and classified within the spotted fever group (sfg). the inability of r. raoultii to spread within l929 cells suggests that this bacterium is unable to polymerize host cell actin, a property exhibited by all sfg rickettsiae except r. peacocki. this result led us to investigate if ricka, the protein thought to generate actin nucleation, was expressed within this rickettsia species. | 2008 | 18612416 |
| evaluation of dermacentor species naturally infected with rickettsia raoultii. | | 2009 | 19438650 |
| rickettsia raoultii and anaplasma phagocytophilum in dermacentor reticulatus ticks collected from bialowieza primeval forest european bison (bison bonasus bonasus), poland. | | 2009 | 19548992 |
| [genetic diversity of ixodid tick-borne pathogens in tomsk city and suburbs]. | we studied two urban and two suburban biotypes of tomsk city for tick-transmitted diseases prevalence in naturally collected ticks. tick-borne encephalitis virus (tbev) was found in 6.5% of tick samples, west nile virus (wnv) in 2.2%, borrelia spp. in 8%, rickettsia spp. in 2.5%, and ehrlichia spp. in 1.7% of samples. genetic markers of powassan virus, bartonella spp., and balbesia spp. were not found. analysis of the genetic diversity of revealed pathogens resulted in the following conclusions: ... | 2009 | 19957906 |
| rickettsia slovaca and rickettsia raoultii in dermacentor marginatus ticks collected on wild boars in tuscany, italy. | during the hunting season 2007-2008, 494 dermacentor marginatus (sulzer) ticks were collected from 109 hunter-killed wild boars, sus scrofa, in lucca's province, tuscany, italy. rickettsia slovaca, the causative agent of tick-borne lymphadenopathy (tibola), was detected in 32.1% of ticks tested (n=112) by using polymerase chain reaction primers targeting glta, ompa, and ompb rickettsial genes. moreover, rickettsia raoultii was found for the first time in italy, with 1.8% infection prevalence. th ... | 2009 | 19960702 |
| scalp eschar and neck lymphadenopathy caused by bartonella henselae after tick bite. | rickettsia slovaca and rickettsia raoultii have been associated with a syndrome characterized by scalp eschar and neck lymphadenopathy following tick bites. however, in many cases, the causative agent remains undetermined. we report 3 cases of this syndrome caused by bartonella henselae, and we propose the term "senlat" to collectively describe this clinical entity. | 2010 | 20070235 |
| eschar and neck lymphadenopathy caused by francisella tularensis after a tick bite: a case report. | | 2011 | 21418587 |
| prevalence of coxiella burnetii and rickettsia spp. in ticks and rodents in southern germany. | coxiella burnetii, the causative agent of q fever, and rickettsia spp. are bacterial pathogens that can be transmitted by ticks of the genus dermacentor (i.e., dermacentor marginatus and d. reticulatus). in germany, the occurrence of these ticks is currently limited to few areas. however, due to increasing temperatures, these vectors will likely extend their distribution in the future, and c. burnetii and rickettsia spp. might spread with them. to assess the prospective risk of human infections ... | 2010 | 21771522 |
| Evaluation of clinical specimens for Rickettsia, Bartonella, Borrelia, Coxiella, Anaplasma, Franciscella and Diplorickettsia positivity using serological and molecular biology methods. | We monitored clinical samples from patients of different age groups from selected regions in Slovakia. Overall seroprevalence evaluated by immunofluorescence (IFA) using nine Bartonella, two Borrelia, six rickettsial (spotted fever and typhus group), two Coxiella, and one human granulocytic ehrlichiosis Anaplasma, Franciscella tularensis and Diplorickettsia massiliensis antigens, in rural and city populations of Slovak Republic, was found to be 32% positive for spotted fever group rickettsiae. O ... | 2011 | 22098390 |
| first report on the occurrence of rickettsia slovaca and rickettsia raoultii in dermacentor silvarum in china. | abstract: background: rickettsioses are among both the longest known and most recently recognized infectious diseases. although new spotted fever group rickettsiae have been isolated in many parts of the world including china, little is known about the epidemiology of rickettsia pathogens in ticks from xinjiang autonomous region of china. methods: in an attempt to assess the potential risk of rickettsial infection after exposure to ticks in xinjiang uygur autonomous region of china, a total of ... | 2012 | 22257726 |
| tick cell culture isolation and growth of rickettsia raoultii from dutch dermacentor reticulatus ticks. | tick cell lines play an important role in research on ticks and tick-borne pathogenic and symbiotic microorganisms. in an attempt to derive continuous dermacentor reticulatus cell lines, embryo-derived primary cell cultures were set up from eggs laid by field ticks originally collected as unfed adults in the netherlands and maintained for up to 16 months. after several months, it became evident that cells in the primary cultures were infected with a rickettsia-like intracellular organism. supern ... | 2012 | 23140894 |
| spotted fever group rickettsiae in dermacentor reticulatus and haemaphysalis punctata ticks in the uk. | spotted fever group (sfg) rickettsiae have recently been identified for the first time in uk ticks. this included the findings of rickettsia helvetica in ixodes ricinus and rickettsia raoultii in dermacentor reticulatus. this paper further investigates the occurrence of sfg rickettsiae in additional geographically distinct populations of d. reticulatus, and for the first time, investigates the occurrence of sfg rickettsiae in uk populations of haemaphysalis punctata ticks. | 2013 | 23870197 |
| rickettsia raoultii in dermacentor reticulatus ticks, chernobyl exclusion zone, ukraine, 2010. | | 2016 | 27442796 |
| human infections with rickettsia raoultii, china. | we used molecular methods to identify rickettsia raoultii infections in 2 persons in china. these persons had localized rashes around sites of tick bites. r. raoultii dna was detected in 4% of dermacentor silvarum ticks collected in the same area of china and in 1 feeding tick detached from 1 patient. | 2014 | 24750663 |
| characterization of rickettsiae in ticks in northeastern china. | tick-borne rickettsioses are considered important emerging zoonoses worldwide, but their etiological agents, rickettsiae, remain poorly characterized in northeastern china, where many human cases have been reported during the past several years. here, we determined the characteristics of rickettsia spp. infections in ticks in this area. | 2016 | 27623998 |
| genome sequence of the tick-borne pathogen rickettsia raoultii. | italic! rickettsia raoultiiis a tick-associated spotted fever group (sfg) organism, causing scalp eschar and neck lymphadenopathy after tick bite (senlat) in humans. we report here the genome sequence of italic! r. raoultiistrain khabarovsk(t)(csur r3(t), atcc vr-1596(t)), which was isolated from a italic! dermacentor silvarumtick collected in russia. | 2016 | 27103706 |
| rickettsia raoultii in haemaphysalis erinacei from marbled polecats, china-kazakhstan border. | we found rickettsia raoultii dna in 2 out of 32 (6.25 %) haemaphysalis erinacei ticks. result showed that the sequences of five genes (17-kda, glta, ompa, rrs, and ompb) were 100 % identity with that of r. raoultii in genbank. this study is the first report on the presence of r. raoultii in h. erinacei from wild marbled polecat, vormela peregusna. our findings suggest that h. erinacei parasitizing wild marbled polecat may serve as reservoir and carriers for r. raoultii in areas around the china- ... | 2015 | 26383238 |
| rickettsia raoultii-like bacteria in dermacentor spp. ticks, tibet, china. | | 0 | 22931966 |
| molecular evidence of potential novel spotted fever group rickettsiae, anaplasma and ehrlichia species in amblyomma ticks parasitizing wild snakes. | amblyomma ticks parasitize a wide range of animals in tropical regions. this study describes the identification of amblyomma ticks from wild snakes in malaysia and the detection of potential human pathogens such as rickettsia, anaplasma, ehrlichia and bartonellae in the ticks. | 2015 | 25889376 |
| kampinos national park: a risk area for spotted fever group rickettsioses, central poland? | ixodid ticks are important vectors of a variety of bacterial and protozoan pathogens which cause infections in humans. in this study, altogether 1041 questing ixodes ricinus (n = 305) and dermacentor reticulatus ticks (n = 736), sympatrically occurring in kampinos national park (kpn), central-east poland, were analyzed by pcr for rickettsia species. overall, the pathogen prevalence in ticks was 27.5 % for i. ricinus and 42.8 % for d. reticulatus. sequencing analysis showed that the first tick sp ... | 2016 | 27631765 |
| novel rickettsia raoultii strain isolated and propagated from austrian dermacentor reticulatus ticks. | continuous culture of tick cell lines has proven a valuable asset in isolating and propagating several different vector-borne pathogens, making it possible to study these microorganisms under laboratory conditions and develop serological tests to benefit public health. we describe a method for effective, cost- and labor-efficient isolation and propagation of rickettsia raoultii using generally available laboratory equipment and rhipicephalus microplus cells, further demonstrating the usefulness ... | 2016 | 27809928 |
| first report of theileria and anaplasma in the mongolian gazelle, procapra gutturosa. | theileria and anaplasma are especially important emerging tick-borne pathogens of animals and humans. molecular surveys and identification of the infectious agents in mongolian gazelle, procapra gutturosa are not only crucial for the species' preservation, but also provide valuable information on parasite and bacterial epidemiology. | 2014 | 25528582 |
| first report of rickettsia raoultii and r. slovaca in melophagus ovinus, the sheep ked. | melophagus ovinus (diptera: hippoboscidae), a hematophagous ectoparasite, is mainly found in europe, northwestern africa, and asia. this wingless fly infests sheep, rabbits, and red foxes, and causes inflammation, wool loss and skin damage. furthermore, this parasite has been shown to transmit diseases, and plays a role as a vector. herein, we investigated the presence of various rickettsia species in m. ovinus. | 2016 | 27884170 |
| vector-borne pathogens in dogs and red foxes from the federal state of brandenburg, germany. | dirofilaria repens is endemic in eastern and southern european regions but was recently found in germany in dogs, mosquitoes and one human patient. since some of the positive dog and mosquito samples were collected in brandenburg, it was aimed to systematically assess the prevalence of d. repens and other canine vector-borne pathogens in brandenburg. dog owners also received a questionnaire and were asked to provide more information about the dogs including travel history. in total, 1023 dog blo ... | 2016 | 27270389 |
| co-circulation of multiple species of rickettsiales bacteria in one single species of hard ticks in shenyang, china. | bacteria in the order rickettsiales include some of the most important zoonotic (re)emerging pathogens for animals and humans. in 2012, a total of 1267 adult haemaphysalis longicornis ticks were collected from domestic animals (cattle and sheep) in shenyang of liaoning province, china. these ticks were grouped into 181 pools (each pool with 6-7 ticks). rickettsiales agents were identified in 93 (51.38%) tick pools using pcr targeting rrs (16s rrna). in addition to 16s rrna gene sequences, glta a ... | 2014 | 25131152 |
| prevalence of infections and co-infections with 6 pathogens in dermacentor reticulatus ticks collected in eastern poland. | occurrence of co-infections with various pathogens in ixodid ticks creates a risk of increased severity of tick-borne diseases in humans and animals exposed to bite of the ticks carrying multiple pathogens. accordingly, co-infections in ticks were subject of numerous analyses, but almost exclusively with regard to ixodes ricinus complex whereas potential tick vectors belonging to other genera were much less studied. taking into consideration the role of dermacentor reticulatus in the transmissio ... | 2017 | 28378977 |
| emergence of tick-borne pathogens (borrelia burgdorferi sensu lato, anaplasma phagocytophilum, ricketsia raoultii and babesia microti) in the kyiv urban parks, ukraine. | to date, only limited data about the presence of ticks and circulation of tick-borne pathogens in urban parks of kyiv in northern ukraine are available. in total, 767 ticks (696 ixodes ricinus and 69 dermacentor reticulatus) collected in seven urban parks and one suburban oak wood park in kyiv were individually analyzed by the pcr assays. tick-borne pathogens, namely spirochetes from borrelia burgdorferi sensu lato complex, anaplasma phagocytophilum, and babesia microti, were detected in 11.1% o ... | 2017 | 27923669 |
| molecular detection of emerging tick-borne pathogens in vojvodina, serbia. | ticks play an important role in disease transmission globally due to their capability to serve as vectors for human and animal pathogens. the republic of serbia is an endemic area for a large number of tick-borne diseases. however, current knowledge on these diseases in serbia is limited. the aim of this study was to investigate the presence of new emerging tick-borne pathogens in ticks collected from dogs and the vegetation from different parts of vojvodina, serbia. a total of 187 ticks, includ ... | 2016 | 26565929 |
| molecular evidence for bacterial and protozoan pathogens in hard ticks from romania. | the aim of the present study was to provide a preliminary insight into the diversity of tick-borne pathogens circulating at the domestic host-tick interface in romania. for this, feeding and questing ticks were analyzed by real-time polymerase chain reaction (pcr) for the presence of anaplasma phagocytophilum, anaplasma platys, ehrlichia canis, borrelia burgdorferi sensu latu, and by pcr and subsequent sequencing for rickettsia spp., babesia spp. and theileria spp. a total of 382 ticks, encompas ... | 2013 | 23428204 |
| molecular detection of rickettsia conorii and other zoonotic spotted fever group rickettsiae in ticks, romania. | the diverse tick fauna as well as the abundance of tick populations in romania represent potential risks for both human and animal health. spotted fever group (sfg) rickettsiae are recognized as important agents of emerging human tick-borne diseases worldwide. however, the epidemiology of rickettsial diseases has been poorly investigated in romania. in urban habitats, companion animals which are frequently exposed to tick infestation, play a role in maintenance of tick populations and as reservo ... | 2016 | 26507182 |
| sympatric occurrence of ixodes ricinus, dermacentor reticulatus and haemaphysalis concinna ticks and rickettsia and babesia species in slovakia. | vojka nad dunajom in the south-west of the slovak republic is a locality with sympatric occurrence of 3 species of ticks. this study investigated the spatial distribution of dermacentor reticulatus, ixodes ricinus, and haemaphysalis concinna ticks in this area and determined the prevalence of babesia and rickettsia species in questing adults of these tick species considered as potential risk for humans and animals. ticks were collected by blanket dragging over the vegetation from september 2011 ... | 2014 | 24973275 |
| scalp eschar and neck lymphadenopathy after tick bite: an emerging syndrome with multiple causes. | the clinical and epidemiological features of 56 patients with scalp eschar associated with neck lymphadenopathy after a tick bite (senlat) syndrome were evaluated at the national french rickettsial center. eschar swabs, crusts, and biopsies as well as ticks and blood samples were acquired for molecular and serological assays. senlat predominantly affects children (p < 0.05), followed by 40- to 70-year-olds, and it is found mostly in women (p < 0.05). the seasonal distribution has two peaks: one ... | 2014 | 24682865 |
| molecular detection of spotted fever group rickettsiae in ticks removed from humans in turkey. | a total of 229 attached hard ticks were collected from humans in yozgat province (turkey) in 2009. all ticks were individually examined for the presence of spotted fever group (sfg) rickettsiae using the polymerase chain reaction (pcr) targeting rickettsial citrate synthase (glta) and outer membrane protein (ompa) genes. rickettsial dna was detected in 24 (10.5%) tick samples belonging to dermacentor marginatus (sulzer) (9 males, 3 females), hyalomma marginatum koch (8 males, 2 females) and haem ... | 2016 | 27131413 |
| rickettsioses in europe. | bacteria of the genera rickettsia and orientia (family rickettsiaceae, order rickettsiales) cause rickettsioses worldwide, and are transmitted by lice, fleas, ticks and mites. in europe, only rickettsia spp. cause rickettsioses. with improvement of hygiene, the risk of louse-borne rickettsiosis (epidemic typhus) is low in europe. nevertheless, recrudescent form of rickettsia prowazekii infection persists. there could be an epidemic typhus outbreak if a body lice epidemic occurs under unfavorable ... | 2016 | 26384814 |
| development of three quantitative real-time pcr assays for the detection of rickettsia raoultii, rickettsia slovaca, and rickettsia aeschlimannii and their validation with ticks from the country of georgia and the republic of azerbaijan. | a previous surveillance study of human pathogens within ticks collected in the country of georgia showed a relatively high infection rate for rickettsia raoultii, r. slovaca, and r. aeschlimannii. these 3 spotted fever group rickettsiae are human pathogens: r. raoultii and r. slovaca cause tick-borne lymphadenopathy (tibola), and r. aeschlimannii causes an infection characterized by fever and maculopapular rash. three quantitative real-time polymerase chain reaction (qpcr) assays, rraoul, rslov, ... | 2012 | 23182543 |
| tick-borne rickettsioses in europe. | rickettsioses are caused by obligate intracellular bacteria within the genus rickettsia, mainly transmitted by arthropods. until recently, mediterranean spotted fever (msf) caused by rickettsia conorii was considered the only tick-borne rickettsiosis in europe. however, 'new' tbr have been described in europe during last years. for instance, other subspecies such as r. conorii caspia and r. conorii israelensis have been involved in msf. dermacentor-borne necrosis erythema and lymphadenopathy/tic ... | 2012 | 23177355 |
| molecular detection of rickettsia species in amblyomma ticks collected from snakes in thailand. | some reptile ticks are potential vectors of pathogens such as spotted fever group (sfg) rickettsiae. here, we report for the first time in detail the molecular evidence, dna sequences and phylogenetic studies, for the presence of rickettsia spp. in amblyomma ticks (amblyomma helvolum and amblyomma varanense) from snakes in thailand. a total of 24 tick samples was collected from 4 snake species and identified. a phylogenetic analysis inferred from the partial sequences of the glta gene indicated ... | 2014 | 25027232 |
| rickettsia massiliae infection and senlat syndrome in romania. | the purpose of this prospective study is to describe the clinical and epidemiological characteristics of rickettsioses in romania, where only rickettsia conorii is known by clinicians but new rickettsia species have been identified recently in ticks. a total of eight patients, including a nine-year-old child, were included between june 2011 and june 2012, in the hospital for infectious and tropical diseases, bucharest, romania. seven cases presented during summer months and one in spring. six pa ... | 2016 | 27034192 |
| bacterial agents in 248 ticks removed from people from 2002 to 2013. | a retrospective study was conducted to analyze the tick species removed from people and to detect tick-infecting bacteria in the specimens collected over the past 10 years at the reference center for rickettsioses, marseille, france. a total of 248 ticks were removed from 200 people, including dermacentor (73), rhipicephalus (67), ixodes (60), amblyomma (8), argas (3), hyalomma (1), and haemaphysalis (1) species. bacterial dna was detected in 101 ticks: rickettsia slovaca (34%) and rickettsia ra ... | 2016 | 26874669 |
| diversity of spotted fever group rickettsia infection in hard ticks from suifenhe, chinese-russian border. | in order to investigate the diversity of spotted fever group (sfg) rickettsia infection in hard ticks, ticks were harvested from the forest areas in suifenhe city, along the chinese-russian border and conventional pcr was carried out using universal sfg rickettsia primers targeting glta and ompa genes to screen for their infection with sfg rickettsia organisms. results showed that of the 215 ticks belonging to ixodes persulcatus, haemaphysalis concinna and haemaphysalis japonica warburton, 1908 ... | 2016 | 26976703 |
| the role of particular tick developmental stages in the circulation of tick-borne pathogens affecting humans in central europe. 3. rickettsiae. | ixodes ricinus, dermacentor reticulatus and d. marginatus ticks are the most important vector for rickettsia spp. in central europe. ticks sustain rickettsial transmission cycles transovarially and transstadially, it makes enable the rickettsial circulation in the tick population in the absence of vertebrate competent reservoir. rickettsia helvetica is transmitted by i. ricinus tick; the highest rates of infection are noted in adult females, lower in males and in nymphs. all tick developmental s ... | 2017 | 27614472 |
| first report of rickettsia raoultii and rickettsia helvetica in dermacentor reticulatus ticks from the czech republic. | tick-borne rickettsioses nowadays present a significant health threat among emerging tick-borne infections. in the study, we screened a total of 997 questing adult dermacentor reticulatus ticks (576 females and 421 males) collected in southern moravia (czech republic) from april to september of 2010 and 2011 for the presence of human pathogenic rickettsiae. here we provide the first evidence on the occurrence of human pathogenic rickettsia raoultii in the local d. reticulatus population indicati ... | 2016 | 27473853 |
| prevalence and diversity of human pathogenic rickettsiae in urban versus rural habitats, hungary. | tick-borne rickettsioses belong to the important emerging infectious diseases worldwide. we investigated the potential human exposure to rickettsiae by determining their presence in questing ticks collected in an urban park of budapest and a popular hunting and recreational forest area in southern hungary. differences were found in the infectious risk between the two habitats. rickettsia monacensis and rickettsia helvetica were identified with sequencing in questing ixodes ricinus, the only tick ... | 2016 | 26613759 |
| new records of spotted fever group rickettsiae in baltic region. | tick-borne rickettsiae are considered to be emerging, but there is still a lack of data on the occurrence and prevalence of the spotted fever group rickettsiae across europe, especially in the baltic countries. the aim of the present study was to investigate the presence of rickettsia spp. in dermacentor reticulatus and ixodes ricinus ticks, as well as to determine their prevalence in various regions of lithuania and latvia. the prevalence of rickettsia spp. in geographically distinct population ... | 2016 | 26383013 |
| isolation of rickettsia helvetica from ticks in slovakia. | to date, only three rickettsial species have been found in ticks in slovakia by serological and/or molecular-biological techniques, namely rickettsia slovaca, candidatus rickettsia irs, and rickettsia raoultii. recently, we succeeded in isolation of the forth species, rickettsia helvetica from ixodes ricinus, the most frequent tick in slovakia. the isolation, positive for 10% of tested ticks, was performed on xtc cells by the shell-vial technique, gimenez staining and light microscopy. the infec ... | 2012 | 23043605 |
| distribution and molecular characteristics of rickettsiae found in ticks across central mongolia. | little is known regarding tick-borne diseases in mongolia, despite having 26% of the population still living nomadic pastoral lifestyles. a total of 1497 adult unfed ticks: 261 ixodes persulcatus, 795 dermacentor nuttalli, and 441 hyalomma asiaticum, were collected from three ecologically distinct regions in central mongolia. tick pools (n = 299) containing ~5 ticks each, were tested for rickettsia and tick-borne encephalitis virus (tbev) using nested polymerase chain reaction, reverse transcrip ... | 2017 | 28153052 |
| spotted fever group rickettsioses and murine typhus in a malaysian teaching hospital. | limited information is available on the etiological agents of rickettsioses in southeast asia. herein, we report the molecular investigation of rickettsioses in four patients attending a teaching hospital in malaysia. dna of rickettsia sp. rf2125, rickettsia typhi, and a rickettsia closely related to rickettsia raoultii was detected in the blood samples of the patients. spotted fever group rickettsioses and murine typhus should be considered in the diagnosis of patients with nonspecific febrile ... | 2016 | 27402519 |
| first report of rickettsia raoultii in field collected dermacentor reticulatus ticks from austria. | in a set of pooled field collected dermacentor reticulatus ticks, rickettsia raoultii, the causative agent of tick-borne lymphadenopathy/dermacentor-borne necrosis erythema and lymphadenopathy, was found for the first time in austria. the coordinates of the positive locations for tick and pathogen abundance are given and shown in a map. | 2016 | 26976704 |
| new foci of haemaphysalis punctata and dermacentor reticulatus in the netherlands. | in 2014 haemaphysalis punctata was found in several locations on the mainland of the netherlands for the first time since 1897. in the same areas dermacentor reticulatus and ixodes ricinus were found. haemaphysalis punctata and d. reticulatus were tested for presence of babesia spp. and rickettsia spp. by pcr. babesia spp. and spotted fever rickettsiae were not detected in any of the collected h. punctata, while several d. reticulatus (6%) collected from the same areas were found to be positive ... | 2016 | 26726807 |
| [on the role of rickettsia raoultii in the epidemiology of rickettsioses in russia]. | the paper analyzes data on the prevalence and possible epidemiological importance of rickettsia raoultii. the possible risk of infection in the population was assessed from the results of a serological study of patients after tick suction and from those of molecular biological determination of contamination of removed carriers. the place of rickettsia raoultii among other rickettsia causing rickettsioses of a tick-borne spotted fever group is assessed in russia. | 2016 | 26720964 |
| isolation and maintenance of rickettsia raoultii in a rhipicephalus sanguineus tick cell line. | rickettsia raoultii, a member of the spotted fever group rickettsiae, has been implicated in cases of debonel/tibola/senlat, and has been detected in dermacentor spp. and rhipicephalus pumilio ticks by pcr. r. raoultii has been isolated in mammalian and tick cell lines. this study aimed to isolate r. raoultii from spanish dermacentor marginatus in tick cell lines. a single adult d. marginatus collected from vegetation in la rioja (northen spain) in october 2012 was surface-sterilised, triturated ... | 2016 | 26428859 |
| tick-borne lymphadenopathy, an emerging disease. | tick-borne lymphadenopathy (tibola) is a spotted fever group disease characterized by an eschar and pronounced enlarged lymph nodes after a scalp tick bite. the goal of this synopsis is to review the tibola literature published until may 2013: forty-one articles (reporting 537 cases) were included. there was a predominance of cases in females and young people. spain, france, and hungary reported the majority of cases, and they were mainly reported in the colder seasons. the involved tick bite wa ... | 2014 | 25090977 |
| discovery of rickettsia species in dermacentor niveus neumann ticks by investigating the diversity of bacterial communities. | ticks (dermacentor niveus neumann) were collected from tacheng, xinjiang uygur autonomous region, and their bacterial diversity was investigated using the 16s rna gene library method from one pooled sample. a total of 452 clones was successfully sequenced and assigned to 4 phyla. the dominant phylum was the proteobacteria, accounting for 62.8% of all the clones of the 16s rrna gene at the confidence level 80%. the other sequences were assigned to the phyla bacteroidetes, firmicutes, actinobacter ... | 2014 | 24950854 |
| rickettsia raoultii, the predominant rickettsia found in dermacentor silvarum ticks in china-russia border areas. | since the year 2000, clinical patterns resembling tick-borne rickettsioses have been noticed in china-russia border areas. epidemiological data regarding species of the aetiological agent, tick vector prevalence and distribution as well as incidence of human cases in the areas are still sparse to date. in order to identify rickettsia species occurring in the areas, we investigated dermacentor silvarum collected in the selected areas. rickettsia raoultii was the predominant rickettsia found in d. ... | 2014 | 24699771 |
| [molecular epidemiological study of rickettsia raoultii in ticks from xinjiang, china]. | | 2013 | 24303567 |
| [update on senlat syndrome: scalp eschar and neck lymph adenopathy after a tick bite]. | senlat syndrome, also known as tibola/debonel, is an emerging disease in france. the major symptoms are necrotic eschar on the scalp associated with painful cervical lymphadenopathy. it occurs mainly in women and children during the cold seasons after a bite by a dermacentor tick, responsible for transmitting rickettsia slovaca or rickettsia raoultii. cutaneous swabs are safe, easy and reliable tools that should be used routinely by physicians to confirm diagnosis. in this particular disease, th ... | 2013 | 24090889 |
| study on tick-borne rickettsiae in eastern poland. i. prevalence in dermacentor reticulatus (acari: amblyommidae). | rickettsia spp. transmitted by ticks are classified mostly in the spotted fever group rickettsiae (sfgr). numerous species of this group have been identified in eurasia as emerging pathogens, but still little is known about their occurrence, effects on human health, and co-incidence with other tick-borne pathogens. the aim of the presented study was to determine the prevalence of rickettsia spp. in adult dermacentor reticulatus (acari: amblyommidae) ticks collected in lublin province of eastern ... | 2013 | 23772574 |
| transmission of rickettsia slovaca and rickettsia raoultii by male dermacentor marginatus and dermacentor reticulatus ticks to humans. | we analyzed rickettsial dna of ticks from tick-borne lymphadenopathy (tibola) patients. dermacentor marginatus (9/17) and dermacentor reticulatus (8/17) transmitted rickettsiae to a similar extent. rickettsia raoultii was detected in more ticks than rickettsia slovaca. we observed the development of tibola symptoms after the bite of males of both tick species. | 2013 | 23602788 |
| rickettsia sp. closely related to rickettsia raoultii (rickettsiales: rickettsiaceae) in an amblyomma helvolum (acarina: ixodidae) tick from a varanus salvator (squamata: varanidae) in thailand. | an engorged female amblyomma helvolum koch tick was removed from an adult varanus salvator laurenti lizard during field collection in thailand. after using polymerase chain reaction to amplify three genes (16s rdna, glta, and ompa), we discovered the presence of a rickettsia sp. of the spotted fever group. phylogenetic analysis revealed that this rickettsia sp. is closely related to rickettsia raoultii mediannikov. therefore, we report herein for the first time the detection of a novel spotted f ... | 2013 | 23427674 |
| spotted fever rickettsiosis caused by rickettsia raoultii--case report. | we report the case of rickettsial eschar-associated spotted fever, most probable due to rickettsia raoultii, an emerging pathogen, which was previously described in patients with tick-borne lymphadenopathy (tibola), also called dermacentor-borne necrosis erythema and lymphadenopathy (debonel). the pathogenicity of r. raoultii is not well established. the survey of ticks from poland (ixodes ricinus and dermacentor reticulatus) revealed that r. raoultii occur in all regions of poland and predomina ... | 2012 | 23101229 |
| rickettsia raoultii, the predominant rickettsia found in mongolian dermacentor nuttalli. | since the year 2005, clinical patterns resembling tick-borne rickettsioses have been noticed in mongolia. epidemiological data regarding species of the aetiological agent, tick vector, prevalence, and distribution as well as incidence of human cases throughout mongolia are still sparse to date. in order to identify rickettsia species occurring in mongolia, we investigated dermacentor nuttalli (n=179) and ixodes persulcatus (n=374) collected in 4 selected provinces. rickettsia raoultii was the pr ... | 2012 | 22784401 |
| rickettsia slovaca and rickettsia raoultii in dermacentor marginatus and dermacentor reticulatus ticks from slovak republic. | rickettsiae, obligate intracellular gram-negative bacteria, responsible for mild to severe diseases in humans are associated with arthropod vectors. dermacentor marginatus and dermacentor reticulatus are known vectors of rickettsia slovaca and rickettsia raoultii distributed across europe. a total of 794 d. marginatus, d. reticulatus and ixodes ricinus adult ticks were collected from the vegetation, removed from horses, sheep, goats and dogs in slovakia. the dna of rickettsia sp. was found in 22 ... | 2012 | 22392435 |
| multi-omics analysis sheds light on the evolution and the intracellular lifestyle strategies of spotted fever group rickettsia spp. | arthropod-borne rickettsia species are obligate intracellular bacteria which are pathogenic for humans. within this genus, rickettsia slovaca and rickettsia conorii cause frequent and potentially severe infections, whereas rickettsia raoultii and rickettsia massiliae cause rare and milder infections. all four species belong to spotted fever group (sfg) rickettsiae. however, r. slovaca and r. raoultii cause scalp eschar and neck lymphadenopathy (senlat) and are mainly associated with dermacentor ... | 2017 | 28775717 |
| rickettsia gravesii sp. nov.: a novel spotted fever group rickettsia in western australian amblyomma triguttatum triguttatum ticks. | a rickettsial organism harboured by amblyomma triguttatum ticks on barrow island, western australia, was discovered after reports of possible rickettsiosis among local workers. subsequent isolation of this rickettsia (strain bwi-1) in cell culture and analysis of its phylogenetic, genotypic and phenotypic relationships with type strains of rickettsia species with standing in nomenclature suggested that it was sufficiently divergent to warrant its classification as a new species. multiple gene co ... | 2017 | 28857025 |
| detection of causative agents of tick-borne rickettsioses in western siberia, russia: identification of rickettsia raoultii and rickettsia sibirica dna in clinical samples. | the main causative agent of tick-borne rickettsioses in siberia is considered to be rickettsia sibirica; however, only a few cases have been genetically confirmed. other pathogenic species of rickettsia have been detected in ixodid ticks in western siberia. the aim of this study was to detect the aetiological agents of tick-borne rickettsioses in western siberia and compare their clinical manifestations. | 2017 | 28606645 |
| rickettsia spp. in dermacentor marginatus ticks: analysis of the host-vector-pathogen interactions in a northern mediterranean area. | in this work, we have analyzed the key features of rickettsia spp. maintenance in dermacentor marginatus ticks in four regions of the northern mediterranean area, where extensive investigations are currently lacking. for this purpose, 380 adult d. marginatus ticks were collected from vegetation and wild ungulates during a 3-year study. a host-vector-pathogen interaction approach was applied to investigate the key components of the disease systems and evaluate their respective weight in the inten ... | 2017 | 28500468 |