| some effects of tick infestations on juvenile northern brown bandicoot (isoodon macrourus). | the effect of tick infestations on body weight and various blood parameters was monitored in juvenile northern brown bandicoots (isoodon macrourus) after release into tick-infested or tick-free enclosures. three species of ticks were observed in the enclosures, haemaphysalis humerosa, ixodes tasmani and ixodes holocyclus. bandicoots released into tick-infested enclosures showed a reduced growth rate (1.8 versus 2.5 g/day increase in body weight), a reduced haematocrit value (27.4 versus 40.0%) a ... | 1991 | 2067048 |
| tick-borne rickettsioses around the world: emerging diseases challenging old concepts. | during most of the 20th century, the epidemiology of tick-borne rickettsioses could be summarized as the occurrence of a single pathogenic rickettsia on each continent. an element of this paradigm suggested that the many other characterized and noncharacterized rickettsiae isolated from ticks were not pathogenic to humans. in this context, it was considered that relatively few tick-borne rickettsiae caused human disease. this concept was modified extensively from 1984 through 2005 by the identif ... | 2005 | 16223955 |
| novel rickettsia in ticks, tasmania, australia. | a novel rickettsia was detected in ixodes tasmani ticks collected from tasmanian devils. a total of 55% were positive for the citrate synthase gene by quantitative pcr. according to current criteria for rickettsia speciation, this new rickettsia qualifies as candidatus rickettsia tasmanensis, named after the location of its detection. | 2009 | 19861066 |
| candidatus bartonella antechini: a novel bartonella species detected in fleas and ticks from the yellow-footed antechinus (antechinus flavipes), an australian marsupial. | bartonella are fastidious, gram-negative, aerobic bacilli belonging to the alphaproteobacteria group. in the last ten years, the discovery of new bartonella species from a variety of mammalian hosts, arthropod vectors and geographical areas has increased. more than 20 species of bartonella have been identified, of which approximately thirteen are associated with disease in humans and animals. recently, four novel species of bartonella were isolated from mammalian hosts in australia: bartonella a ... | 2010 | 21215534 |
| novel borrelia species detected in echidna ticks, bothriocroton concolor, in australia. | to date, little has been documented about microorganisms harboured within australian native ticks or their pathogenic potential. recently, a borrelia sp. related to the relapsing fever (rf) group was identified in a single tick removed from a wild echidna (tachyglossus aculeatus). the present study investigated the presence of borrelia in 97 bothriocroton concolor ticks parasitizing echidnas in queensland, new south wales, and victoria, australia, using nested pcr with borrelia-specific primers ... | 2016 | 27301754 |
| the recent evolution of a maternally-inherited endosymbiont of ticks led to the emergence of the q fever pathogen, coxiella burnetii. | q fever is a highly infectious disease with a worldwide distribution. its causative agent, the intracellular bacterium coxiella burnetii, infects a variety of vertebrate species, including humans. its evolutionary origin remains almost entirely unknown and uncertainty persists regarding the identity and lifestyle of its ancestors. a few tick species were recently found to harbor maternally-inherited coxiella-like organisms engaged in symbiotic interactions, but their relationships to the q fever ... | 2015 | 25978383 |
| update on tick-borne rickettsioses around the world: a geographic approach. | tick-borne rickettsioses are caused by obligate intracellular bacteria belonging to the spotted fever group of the genus rickettsia. these zoonoses are among the oldest known vector-borne diseases. however, in the past 25 years, the scope and importance of the recognized tick-associated rickettsial pathogens have increased dramatically, making this complex of diseases an ideal paradigm for the understanding of emerging and reemerging infections. several species of tick-borne rickettsiae that wer ... | 0 | 24092850 |
| a rickettsiella bacterium from the hard tick, ixodes woodi: molecular taxonomy combining multilocus sequence typing (mlst) with significance testing. | hard ticks (acari: ixodidae) are known to harbour intracellular bacteria from several phylogenetic groups that can develop both mutualistic and pathogenic relationships to the host. this is of particular importance for public health as tick derived bacteria can potentially be transmitted to mammals, including humans, where e.g. rickettsia or coxiella act as severe pathogens. exact molecular taxonomic identification of tick associated prokaryotes is a necessary prerequisite of the investigation o ... | 2012 | 22675436 |
| arsenophonus nasoniae and rickettsiae infection of ixodes ricinus due to parasitic wasp ixodiphagus hookeri. | arsenophonus nasoniae, a male-killing endosymbiont of chalcid wasps, was recently detected in several hard tick species. following the hypothesis that its presence in ticks may not be linked to the direct occurrence of bacteria in tick's organs, we identified a. nasoniae in wasps emerging from parasitised nymphs. we confirmed that 28.1% of ixodiphagus hookeri wasps parasitizing ixodes ricinus ticks were infected by a. nasoniae. moreover, in examined i. ricinus nymphs, a. nasoniae was detected on ... | 2016 | 26901622 |
| the role of cats in the eco-epidemiology of spotted fever group diseases. | mediterranean spotted fever (msf), whose etiological agent is r. conorii, is one of the oldest described vector-borne infectious diseases. although it is endemic in the mediterranean area, clinical cases have also been reported in other regions. r. massiliae-bar29 is related to msf cases. this strain is distributed worldwide. r. conorii and r. massiliae-bar29 are transmitted by ticks. dogs are considered the sentinel of r. conorii infection. cats could also be involved in their transmission. ric ... | 2014 | 25084969 |
| systematic revision of the adeleid haemogregarines, with creation of bartazoon n. g., reassignment of hepatozoon argantis garnham, 1954 to hemolivia, and molecular data on hemolivia stellata. | life cycles and molecular data for terrestrial haemogregarines are reviewed in this article. collection material was re-examined: hepatozoon argantis garnham, 1954 in argas brumpti was reassigned to hemolivia as hemolivia argantis (garnham, 1954) n. comb.; parasite dna was extracted from a tick crush on smear of an archived slide of hemolivia stellata in amblyomma rotondatum, then the 18s ssrrna gene was amplified by pcr. a systematic revision of the group is proposed, based on biological life c ... | 2015 | 26551414 |
| novel rickettsiella bacterium in the leafhopper orosius albicinctus (hemiptera: cicadellidae). | bacteria in the genus rickettsiella (coxiellaceae), which are mainly known as arthropod pathogens, are emerging as excellent models to study transitions between mutualism and pathogenicity. the current report characterizes a novel rickettsiella found in the leafhopper orosius albicinctus (hemiptera: cicadellidae), a major vector of phytoplasma diseases in europe and asia. denaturing gradient gel electrophoresis (dgge) and pyrosequencing were used to survey the main symbionts of o. albicinctus, r ... | 2013 | 23645190 |
| a survey of ticks (acari: ixodidae) of companion animals in australia. | ticks are among the most important vectors of pathogens affecting companion animals, and also cause health problems such as tick paralysis, anaemia, dermatitis, and secondary infections. twenty ixodid species have previously been recorded on dogs, cats, and horses in australia, including rhipicephalus sanguineus, ixodes holocyclus and haemaphysalis longicornis, which transmit tick-borne diseases. a survey of hard ticks (acari: ixodidae) was conducted during 2012-2015 to investigate tick species ... | 2016 | 27160149 |
| detection of a hepatozoon and spotted fever group rickettsia species in the common marsupial tick (ixodes tasmani) collected from wild tasmanian devils (sarcophilus harrisii), tasmania. | tasmanian devils are the largest extant marsupial carnivores, confined to the australian island state of tasmania. the iconic marsupial has dramatically declined in number since the discovery of devil facial tumor disease in 1996 and efforts are being made to uncover vital information to assist in the long-term survival of the species. ticks are the main vectors of arthropod-borne disease in animals, raising the question of whether tasmanian devils may be host to arthropods capable of harboring ... | 2009 | 19303711 |
| molecular detection of rickettsia, coxiella and rickettsiella dna in three native australian tick species. | three australian native animal species yielded 60 samples composed of three indigenous ticks. hosts included twelve koalas, two echidnas and one wombat from victoria, and ticks were of the species ixodes tasmani (n = 42), bothriocroton concolor (n = 8) and b. auruginans (n = 10), respectively. pcr screening and sequencing detected a species of coxiella, sharing closest sequence identity to c. burnetii (>98%), in all b. auruginans, as well as a species of rickettsia, matching closest to r. massil ... | 2009 | 19296229 |
| bartonella-like dna detected in ixodes tasmani ticks (acari: ixodida) infesting koalas (phascolarctos cinereus) in victoria, australia. | a total of 42 ticks comprising ixodes tasmani (n = 41) and ixodes trichosuri (n = 1) were collected from wild koalas (phascolarctos cinereus) at the koala convention centre, philip island, victoria, australia and screened for the presence of bartonella using the target gene glta. bartonella-like dna was detected in 4 of the 19 pooled tick samples (21%). all positive ticks were male. analysis of partial sequences for the glta gene indicated the presence of a bartonella-related species similar to ... | 2009 | 19271994 |
| detection of a spotted fever group rickettsia in the tick ixodes tasmani collected from koalas in port macquarie, australia. | four species of rickettsia are recognized as endemic to australia. this study reports the detection of a new spotted fever group rickettsia in the common marsupial tick ixodes tasmani neumann collected from koalas (phascolarctos cinereus) in port macquarie, nsw, australia. based on the results of polymerase chain reaction (pcr) amplification of extracted tick dna with primers targeting the citrate synthase gene (glta) and the outer membrane proteins a and b (ompa. ompb), rickettsiae were detecte ... | 2008 | 18714878 |
| spotted fever group rickettsial infections in australia. | more than four decades ago, rickettsia australis was discovered to be the etiologic agent of queensland tick typhus (qtt), yet many unanswered questions persist about the ecology, epidemiology, and clinical features of this disease. we review 46 previously published cases of qtt along with 16 cases discovered by active surveillance. qtt is usually a mild disease. patients often have regional lymphadenopathy and eschars. some have vesicular rashes. because clinical features overlap, serologic tes ... | 1991 | 1962102 |
| the accumulation of microfilariae beneath the sites of attachment of ixodes tasmani. | | 1969 | 5789102 |
| a survey of ticks (acari: ixodidae) from an over-abundant koala (phascolarctos cinereus) population in south eastern australia, with an overview of the ticks and mites of koalas. | within australia, koala over-abundance has become a serious problem in some areas resulting in significant damage to native forests through defoliation. an over-abundant victorian koala population was surveyed for ticks in the autumn of 2016. during the survey 1036 ticks were collected from 158 koalas. all ticks collected were identified as ixodes tasmani. tick prevalence, infestation intensity and on-host sex ratios were calculated for the population. an overview of the ticks and mites associat ... | 2017 | 28849430 |
| health evaluation of free-ranging eastern bettongs (bettongia gaimardi) during translocation for reintroduction in australia. | sixty (19 male, 41 female) free-ranging adult eastern bettongs (bettongia gaimardi) were captured in tasmania and translocated to the australian capital territory between july 2011 and september 2012 for reintroduction into fenced, predator-proof reserves. the bettongs were anesthetized for physical examination and screened for selected diseases during translocation. reference ranges for hematologic and biochemical parameters were determined. two bettongs had detectable antibodies to the alphahe ... | 2014 | 24484484 |
| genome sequence of rickettsia australis, the agent of queensland tick typhus. | rickettsia australis strain phillips(t) was isolated in queensland, australia, in 1950. it is the tick-borne agent of queensland tick typhus, a disease endemic in australia. the 1.29-mb genome sequence of this bacterium is highly similar to that of rickettsia akari but contains two plasmids. | 0 | 22933759 |