| aggregation pheromones in 2 australian hard ticks, ixodes holocyclus and aponomma concolor. | the presence of an aggregation pheromone has been demonstrated for the first time in indigenous australian ticks. filter paper discs exposed to either australian paralysis ticks ixodes holocyclus or echidna ticks aponomma concolor showed inter-sex or intra-sex attraction for ticks of their own species. nymphal exuviae of ap, concolor were highly attractive to adult ticks. discs were significantly attractive to i. holocyclus at distances up to 80 cm. | 1977 | 862817 |
| host detection by four australian tick species. | the behavior of 4 tick species in the presence of their dominant host species was examined. nymphs and adult ticks could locate a host from greater distances than the larvae. adult aponomma concolor were able to locate their mammalian host (echidna) from distances greater than 3 reptile-infesting species could locate their hosts. the results suggested that all 4 tick species detect hosts passively, which may be related to the relative scarcity of hosts and their irregular use of refuge sites. | 1991 | 2040944 |
| morbidity and mortality of free-living and captive echidnas, tachyglossus aculeatus (shaw), in australia. | between 1976 and 1985 necropsies were conducted on 55 free-living and 18 captive echidnas originating from several localities in victoria, australia. injuries arising from motor vehicle accidents were the most common cause of death (24 of 55; 47%). an additional nine live echidnas were presented for clinical examination for dog or fox wounds (eight), or wire snare wounds (one). incidental infestations with ticks (aponomma concolor) on the skin or in the ear canal (eight of 82; 10%), and infectio ... | 1986 | 3735583 |
| host-seeking behaviour by australian ticks (acari: ixodidae) with differing host specificities. | ticks generally detach from their hosts into sites where they are later exposed to host species which may or may not be suitable for infestation. the question of how four species of ixodid ticks, with differing specificities, behave towards such potential host species was examined. observations of the generalists, aponomma hydrosauri and amblyomma limbatum and the specialists, aponomma fimbriatum and aponomma concolor, showed that the generalists were attracted to a wider range of potential host ... | 1995 | 7641569 |
| evolution of the secondary structure of the rrna internal transcribed spacer 2 (its2) in hard ticks (ixodidae, arthropoda). | its2 sequences are used extensively in molecular taxonomy and population genetics of arthropods and other animals yet little is known about the molecular evolution of its2. we studied the secondary structure of its2 in species from each of the six main lineages of hard ticks (family ixodidae). the its2 of these ticks varied in length from 679 bp in ixodes scapularis to 1547 bp in aponomma concolor. nucleotide content varied also: the its2 of ticks from the prostriata lineage (ixodes spp.) had 46 ... | 2002 | 11920135 |
| bothriocroton concolor (acari: ixodidae) on the kangaroo island kangaroo: a new host-parasite relationship. | in 2006, we examined kangaroo island kangaroos, macropusfuliginosusfuliginosus, for ticks. we collected three tick species: ixodes hirsti hassall, hemaphysalis bancrofti nuttall & warburton, and bothriocroton concolor (neumann). surprisingly, the specimens included eight females and one nymph of b. concolor, which had previously been considered strictly host specific to the echidna (tachyglossus sp.). this is the first record of b. concolor on the kangaroo island kangaroo. | 2007 | 17915525 |
| 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 |
| a 24-48 h fed amblyomma americanum tick saliva immuno-proteome. | multiple tick saliva proteins, the majority of which are unknown, confer tick resistance in repeatedly infested animals. the objective of this study was to identify the 24-48 h fed amblyomma americanum tick saliva immuno-proteome. the 24-48 h tick-feeding phase is critical to tick parasitism as it precedes important events in tick biology, blood meal feeding and disease agent transmission. fed male, 24 and 96 h fed female phage display cdna expression libraries were biopanned using rabbit antibo ... | 2014 | 24962723 |
| bacterial profiling reveals novel "ca. neoehrlichia", ehrlichia, and anaplasma species in australian human-biting ticks. | in australia, a conclusive aetiology of lyme disease-like illness in human patients remains elusive, despite growing numbers of people presenting with symptoms attributed to tick bites. in the present study, we surveyed the microbial communities harboured by human-biting ticks from across australia to identify bacteria that may contribute to this syndrome. universal pcr primers were used to amplify the v1-2 hyper-variable region of bacterial 16s rrna genes in dna samples from individual ixodes h ... | 2015 | 26709826 |
| 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 |
| 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 |
| complete mitochondrial genome sequence data provides genetic evidence that the brown dog tick rhipicephalus sanguineus (acari: ixodidae) represents a species complex. | ticks are blood-sucking ectoparasites of great medical and veterinary significance that can transmit bacteria, protozoa, fungi and viruses, and cause a variety of human and animal diseases worldwide. in the present study, we sequenced the complete mitochondrial (mt) genome of rhipicephalus sanguineus from china (rsc) and compared with that of r. sanguineus from usa (rsu). nucleotide sequence difference in the full mt genome was 11.23% between rsc and rsu. for the 13 protein-coding genes, compari ... | 2013 | 23630448 |
| detection of theileria orientalis genotypes in haemaphysalis longicornis ticks from southern australia. | theileria are blood-borne intracellular protozoal parasites belonging to the phylum apicomplexa. previously considered a benign parasite in australia, outbreaks of clinical disease resulting from theileria orientalis genotypes have been reported in australia since 2006. since this time, outbreaks have become widespread in south-eastern australia, resulting in significant adverse impacts on local dairy and beef industries. this paper provides the first investigation into the possible biological a ... | 2015 | 25889204 |
| 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 |
| observation of a novel babesia spp. in eastern grey kangaroos (macropus giganteus) in australia. | the roles and epidemiological features of tick-borne protozoans are not well elicited in wildlife. babesia spp. are documented in many domestic animals, including cattle, horses, pigs, dogs and cats. three cases affecting eastern grey kangaroos are described. the kangaroos exhibited neurological signs, depression and marked anaemia, and microscopic examination of blood smears revealed intraerythrocytic piroplasms. one to seven intraerythrocytic spherical, oval, pyriform and irregularly-shaped pa ... | 2012 | 24533316 |
| phylogenetic analysis of ticks (acari: ixodida) using mitochondrial genomes and nuclear rrna genes indicates that the genus amblyomma is polyphyletic. | our understanding of the phylogenetic relationships among tick lineages has been limited by the lack of resolution provided by the most commonly used phylogenetic markers. mitochondrial genomes are increasingly used to address controversial phylogenetic relationships. to date, the complete mitochondrial genomes of eleven tick species have been sequenced; however, only three of these species are metastriate ticks, the most speciose lineage of ticks. in this study, we present the nucleotide sequen ... | 2012 | 22465402 |
| molecular characterization of 'candidatus borrelia tachyglossi' (family spirochaetaceae) in echidna ticks, bothriocroton concolor. | recently, a novel species of the genus borreliawas identified in bothriocroton concolor and ixodes holocyclus ticks from echidnas. analyses of 16s rrna and flab genes identified three closely related genotypes of this bacterium (borrelia sp. aus a-c) that were unique and distinct from previously described borreliae. phylogenetic analyses of flab (763 bp), groel (1537 bp), gyrb (1702 bp) and glpq (874 bp) gene sequences and concatenated sequences (3585 bp) of three gene loci (16s rrna, flab and g ... | 2017 | 28475032 |
| a molecular survey of tick-borne pathogens from ticks collected in central queensland, australia. | central queensland (cq) is a large and isolated, low population density, remote tropical region of australia with a varied environment. the region has a diverse fauna and several species of ticks that feed upon that fauna. this study examined 518 individual ticks: 177 rhipicephalus sanguineus (brown dog tick), 123 haemaphysalis bancrofti (wallaby tick), 102 rhipicephalus australis (australian cattle tick), 47 amblyomma triguttatum (ornate kangaroo tick), 57 ixodes holocyclus (paralysis tick), 9 ... | 2018 | 29336689 |
| australian penguin ticks screened for novel borrelia species. | lyme borreliosis (or lyme disease) is an emerging threat to human health in the northern hemisphere caused by tick-borne bacteria from the borrelia burgdorferi sensu lato (bbsl) complex. seabirds are important reservoir hosts of some members of the bbsl complex in the northern hemisphere, and some evidence suggests this may be true of penguins in the southern hemisphere. while the bbsl complex has not been detected in australia, a novel borrelia species ('candidatus borrelia tachyglossi') was re ... | 2017 | 29275874 |