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Genomes and Genes | Stephen C BarkerSummaryAffiliation: University of Queensland Country: Australia Publications
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Publications
Low intraspecific variation in the rRNA internal transcribed spacer 2 (ITS2) of the Australian paralysis tick, Ixodes holocyclusM Shaw
Department of Zoology and Entomology, University of Queensland, Brisbane, Australia
Parasitol Res 88:247-52. 2002..1%). These data indicate that I. holocyclus does not contain cryptic species despite possible geographic isolation of some populations. We conclude that variation in the ITS2 is likely to be informative about the phylogeny of the group...- An ex vivo, assessor blind, randomised, parallel group, comparative efficacy trial of the ovicidal activity of three pediculicides after a single application--melaleuca oil and lavender oil, eucalyptus oil and lemon tea tree oil, and a "suffocation" pedicStephen C Barker
Parasitology Section, School of Chemistry and Molecular Biosciences, and UniQuest Pty Ltd, University of Queensland, Brisbane, QLD, Australia
BMC Dermatol 11:14. 2011..Eggs were collected, pre-treatment and post-treatment, from subjects with different types of hair, different coloured hair and hair of different length... - A randomised, assessor blind, parallel group comparative efficacy trial of three products for the treatment of head lice in children--melaleuca oil and lavender oil, pyrethrins and piperonyl butoxide, and a "suffocation" productStephen C Barker
Parasitology Section, School of Chemistry and Molecular Biosciences, and UniQuest Pty, Ltd, University of Queensland, St Lucia, Queensland, 4072 Australia
BMC Dermatol 10:6. 2010.... - Systematics and evolution of ticks with a list of valid genus and species namesS C Barker
Department of Microbiology and Parasitology, University of Queensland, Brisbane 4072, Queensland, Australia
Parasitology 129:S15-36. 2004..Finally, we present a list of the 899 valid genus and species names of ticks as of February 2004... - Numerous gene rearrangements in the mitochondrial genome of the wallaby louse, Heterodoxus macropus (Phthiraptera)R Shao
Department of Microbiology and Parasitology, and Institute for Molecular Bioscience, University of Queensland, Brisbane, Queensland, Australia
Mol Biol Evol 18:858-65. 2001..The large number of gene rearrangements in the mt genome of H. macropus is unprecedented for an arthropod... - A total-evidence phylogeny of ticks provides insights into the evolution of life cycles and biogeographyA Murrell
Department of Microbiology and Parasitology, University of Queensland, Brisbane 4072, Australia
Mol Phylogenet Evol 21:244-58. 2001..g., one gene or morphology) seldom resolve many phylogenetic relationships, but analyses of more than one dataset can generate well-resolved phylogenies for these ticks... - Evolution of the secondary structure of the rRNA internal transcribed spacer 2 (ITS2) in hard ticks (Ixodidae, Arthropoda)O Hlinka
Department of Microbiology and Parasitology, and Institute for Molecular Biosciences, The University of Queensland, Brisbane 4072, Australia
Heredity 88:275-9. 2002.... - Phylogeny, evolution and historical zoogeography of ticks: a review of recent progressStephen C Barker
Department of Microbiology and Parasitology, Institute for Molecular Biosciences, University of Queensland, Brisbane 4072, QLD, Australia
Exp Appl Acarol 28:55-68. 2002..annulatus, but the nomenclature will have been changed to reflect our knowledge of the phylogeny and evolution of these ticks. New insights into the historical zoogeography of ticks will also be presented... - Rates of gene rearrangement and nucleotide substitution are correlated in the mitochondrial genomes of insectsRenfu Shao
Department of Microbiology and Parasitology, and Institute for Molecular Bioscience, The University of Queensland, Brisbane, Australia
Mol Biol Evol 20:1612-9. 2003..73, P = 0.01; Rs = 0.67, P < 0.05). We propose that increased rates of nucleotide substitution may lead to increased rates of gene rearrangement in the mt genomes of insects... - Evolution of duplicate control regions in the mitochondrial genomes of metazoa: a case study with Australasian Ixodes ticksRenfu Shao
Department of Microbiology and Parasitology, and Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
Mol Biol Evol 22:620-9. 2005..Duplicate CRs have much potential as phylogenetic markers at low taxonomic levels, such as within genera, within families, or among families, but not at high taxonomic levels, such as among orders... - The single mitochondrial chromosome typical of animals has evolved into 18 minichromosomes in the human body louse, Pediculus humanusRenfu Shao
The University of Queensland, Parasitology Section, School of Chemistry and Molecular Biosciences, Queensland, Australia
Genome Res 19:904-12. 2009..Fragmentation of mt genome, however, has coevolved with blood feeding in the sucking lice. It will be of interest to explore whether or not life history features are associated with the evolution of fragmented chromosomes... - Multiple origins of parasitism in lice: phylogenetic analysis of SSU rDNA indicates that the Phthiraptera and Psocoptera are not monophyleticAnna Murrell
Department of Microbiology and Parasitology, Parasitology Section, School of Molecular and Microbial Sciences, The University of Queensland, Brisbane, 4072, Australia
Parasitol Res 97:274-80. 2005..In addition, there are implications for the evolution of parasitism in insects; parasitism may have evolved twice in lice or have evolved once and been subsequently lost in the Liposcelididae... - Synonymy of Boophilus Curtice, 1891 with Rhipicephalus Koch, 1844 (Acari: Ixodidae)Anna Murrell
Department of Microbiology and Parasitology, University of Queensland, Brisbane, 4072 Queensland, Australia
Syst Parasitol 56:169-72. 2003..In addition, Rhipicephalus is a well-known genus and the change proposed is simple -- all five species of Boophilus become members of Rhipicephalus (Boophilus)... - Molecular mechanisms for the variation of mitochondrial gene content and gene arrangement among chigger mites of the genus Leptotrombidium (Acari: Acariformes)Renfu Shao
Faculty of Pharmacy and Pharmaceutical Sciences, Fukuyama University, Fukuyama, Hiroshima, 729 0292, Japan
J Mol Evol 63:251-61. 2006..pallidum evolved from the type present in the other three Leptotrombidium species, and (2) three molecular mechanisms were involved in the evolution of mt gene content and gene arrangement in Leptotrombidium species... - Novel mitochondrial gene content and gene arrangement indicate illegitimate inter-mtDNA recombination in the chigger mite, Leptotrombidium pallidumRenfu Shao
Faculty of Pharmacy and Pharmaceutical Sciences, Fukuyama University, Fukuyama, Hiroshima 729 0292, Japan
J Mol Evol 60:764-73. 2005..pallidum... - Recurrent gains and losses of large (84-109 bp) repeats in the rDNA internal transcribed spacer 2 (ITS2) of rhipicephaline ticksA Murrell
Department of Microbiology and Parasitology, Institute for Molecular Biosciences, University of Queensland, Brisbane 4072 Queensland, Australia
Insect Mol Biol 10:587-96. 2001..In our putative secondary structure, each repeat copy can fold into a distinct and almost identical stem-loop complex; a gain or loss of a repeat copy apparently does not impair the function of the ITS2 in these ticks... - The mitochondrial genomes of soft ticks have an arrangement of genes that has remained unchanged for over 400 million yearsR Shao
Department of Microbiology and Parasitology, and Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
Insect Mol Biol 13:219-24. 2004.... - The head and body lice of humans are genetically distinct (Insecta: Phthiraptera, Pediculidae): evidence from double infestationsN P Leo
Department of Microbiology and Parasitology, University of Queensland, Brisbane 4072, Australia
Heredity 95:34-40. 2005..Our results indicate that head and body lice are separate species... - Extraordinary number of gene rearrangements in the mitochondrial genomes of lice (Phthiraptera: Insecta)C Covacin
Parasitology Section, School of Molecular and Microbial Sciences, The University of Queensland, Brisbane, Australia
Insect Mol Biol 15:63-8. 2006..There has been an extraordinary number of gene rearrangements in the mitochondrial genomes of lice!.. - Mitochondrial genomes of parasitic arthropods: implications for studies of population genetics and evolutionR Shao
Parasitology Section, School of Molecular and Microbial Sciences, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia
Parasitology 134:153-67. 2007.... - Transmission ratio distortion in the human body louse, Pediculus humanus (Insecta: Phthiraptera)C J McMeniman
Parasitology Section, School of Molecular and Microbial Sciences, University of Queensland, Brisbane 4072, Australia
Heredity 96:63-8. 2006..We interpret this pattern of inheritance as evidence for extreme transmission ratio distortion of paternal alleles in this species... - Susceptibility of head lice (Pediculus humanus capitis) to pediculicides in AustraliaJ A Hunter
Department of Microbiology and Parasitology, University of Queensland, 4072 Brisbane, Australia
Parasitol Res 90:476-8. 2003.... - The novel mitochondrial gene arrangement of the cattle tick, Boophilus microplus: fivefold tandem repetition of a coding regionN J Campbell
Department of Parasitology, University of Queensland, Brisbane, Australia
Mol Biol Evol 16:732-40. 1999..microplus. Instead, slipped-strand mispairing or recombination are the most plausible explanations for the evolution of these tandem repeats... - The Australian paralysis tick may be the missing link in the transmission of Hendra virus from bats to horses to humansS C Barker
Department of Microbiology and Parisitology, Institute for Molecular Biosciences, ARC Special Research Center for Functional and Applied Genomics, The University of Queensland, Brisbane, Australia
Med Hypotheses 60:481-3. 2003.... - Intragenomic variation in ITS2 rDNA in the louse of humans, Pediculus humanus: ITS2 is not a suitable marker for population studies in this speciesN P Leo
Department of Microbiology and Parasitology, University of Queensland, Brisbane 4072, Queensland
Insect Mol Biol 11:651-7. 2002..A phylogenetic tree of 15 different ITS2 sequences showed that the sequences from individual lice were not monophyletic. We conclude that the ITS2 is not a useful marker of populations for Pediculus humanus... - Acetylcholinesterase cDNA of the cattle tick, Boophilus microplus: characterisation and role in organophosphate resistanceG D Baxter
Department of Parasitology, University of Queensland, Brisbane, Australia
Insect Biochem Mol Biol 28:581-9. 1998..No point mutations were detected in the acetylcholinesterase gene from organophosphate resistant strains of B. microplus. Alternative explanations for resistance to organophosphates in B. microplus are discussed... - Isolation of a cDNA for an octopamine-like, G-protein coupled receptor from the cattle tick, Boophilus microplusG D Baxter
Department of Parasitology, University of Queensland, Brisbane, Australia
Insect Biochem Mol Biol 29:461-7. 1999..Thus, a point mutation/s did not confer resistance to amitraz in the strains we studied. Alternative explanations for resistance to amitraz in B. microplus are discussed... - Evidence from mitochondrial DNA that head lice and body lice of humans (Phthiraptera: Pediculidae) are conspecificN P Leo
Department of Microbiology and Parasitology, Institute for Molecular Biosciences and ARC Special Research Centre for Functional and Applied Genomics, University of Queensland, Brisbane, Australia
J Med Entomol 39:662-6. 2002.... - Phylogeny of the hard ticks (Ixodidae) inferred from 18S rRNA indicates that the genus Aponomma is paraphyleticS J Dobson
Department of Parasitology, The University of Queensland, St Lucia, Queensland, 4072, Australia
Mol Phylogenet Evol 11:288-95. 1999..latum and Ap. fimbriatum). There was a basal divergence between endemic Australian and other species in both the Metastriata and the Prostriata divisions of the hard ticks... - Unravelling the evolution of the head lice and body lice of humansNatalie P Leo
Parasitology Section, School of Molecular and Microbial Sciences, University of Queensland, Brisbane, QLD 4072, Australia
Parasitol Res 98:44-7. 2005..PLoS Biol 2:e340, 2004) proposed that they diverged 1.18 mya and suggested that one of the lineages, the H-only lineage, evolved in the New World on Homo erectus. We discuss this hypothesis in light of our results from ssu rRNA... - Supergroup F Wolbachia bacteria parasitise lice (Insecta: Phthiraptera)Catherine Covacin
Parasitology Section, School of Molecular and Microbial Sciences, The University of Queensland, Brisbane, Australia
Parasitol Res 100:479-85. 2007..We propose a novel mechanism for the horizontal transfer of Wolbachia between different species of lice from birds: transfer of Wolbachia during phoresis by hippoboscid flies... - Chimeric mitochondrial minichromosomes of the human body louse, Pediculus humanus: evidence for homologous and non-homologous recombinationRenfu Shao
The University of Queensland, School of Chemistry and Molecular Biosciences, Queensland 4072, Australia
Gene 473:36-43. 2011..Our analyses of the nucleotide sequences of chimeric mt minichromosomes indicate both homologous and non-homologous recombination between minichromosomes in the mitochondria of the human body louse... - The value of idiosyncratic markers and changes to conserved tRNA sequences from the mitochondrial genome of hard ticks (Acari: Ixodida: Ixodidae) for phylogenetic inferenceAnna Murrell
Department of Microbiology and Parasitology, Institute for Molecular Biosciences, University of Queensland, Brisbane, Queensland 4072, Australia
Syst Biol 52:296-310. 2003..Idiosyncratic markers and changes to typically conserved nucleotides in tRNAs that are phylogenetically informative were common in this data set, and thus these types of markers might be found in other organisms... - Monooxygenases play only a minor role in resistance to synthetic pyrethroids in the cattle tick, Boophilus microplusA L Crampton
Department of Microbiology and Parasitology, and Center for Cellular and Molecular Biology, The University of Queensland, Brisbane, Australia
Exp Appl Acarol 23:897-905. 1999..1; after flumethrin 8.9). We hypothesize that B. microplus lacks monooxygenases capable of conferring resistance to SPs because it and its recent ancestors were blood-feeders rather than herbivores... - Identification and characterisation of a cytochrome P450 gene and processed pseudogene from an arachnid: the cattle tick, Boophilus microplusA L Crampton
Department of Parasitology, University of Queensland, Brisbane, Australia
Insect Biochem Mol Biol 29:377-84. 1999..The CYP4 genes from arthropods have diverged from each other more than those of mammals; consequently the phylogeny of the arthropod genes could not be resolved... - A new family of cytochrome P450 genes (CYP41) from the cattle tick, Boophilus microplusA L Crampton
Department of Parasitology, University of Queensland, Brisbane, Australia
Insect Biochem Mol Biol 29:829-34. 1999..e. compounds that are foreign to the cattle tick. The phylogenetic position of CYP41 could not be resolved because of the high level of sequence divergence at both the nucleotide and amino acid levels... - Microsatellite loci of the cattle tick Boophilus microplus (Acari: Ixodidae)N N Chigagure
Department of Microbiology and Parasitology, University of Queensland, Brisbane, Australia
Exp Appl Acarol 24:951-6. 2000..Thus the presence of non-repeat bases in a repeated sequence seems to constrain the evolution of additional repeats by slip-strand misparing at these loci... - Phylogenetic analysis of ticks (Acari: Ixodida) using mitochondrial genomes and nuclear rRNA genes indicates that the genus Amblyomma is polyphyleticThomas D Burger
School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia
Mol Phylogenet Evol 64:45-55. 2012.... - Analysis of the sequence and expression of a second putative acetylcholinesterase cDNA from organophosphate-susceptible and organophosphate-resistant cattle ticksGlenn D Baxter
Department of Microbiology and Parasitology, and Institute for Molecular Biosciences, University of Queensland, Brisbane 4072, Australia
Insect Biochem Mol Biol 32:815-20. 2002..This seems to contradict studies of enzyme kinetics, which indicated that only one form of AChE was present in the synganglia, the site of the action of OPs, in this species of tick... - A survey of bacterial diversity in ticks, lice and fleas from AustraliaAnna Murrell
Department of Microbiology and Parasitology and Institute for Molecular Bioscience, ARC Special Research Centre for Functional and Applied Genomics, University of Queensland, Brisbane, 4072 QLD, Australia
Parasitol Res 89:326-34. 2003..Species of Bacillus and Proteus, which have biopesticide potential, were found in some of these ectoparasites. Overall, the communities of bacteria were similar to those found in other studies of parasitic arthropods... - The highly rearranged mitochondrial genome of the plague thrips, Thrips imaginis (Insecta: Thysanoptera): convergence of two novel gene boundaries and an extraordinary arrangement of rRNA genesRenfu Shao
Department of Microbiology and Parasitology and Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
Mol Biol Evol 20:362-70. 2003..We discuss the potential of hemipteroid insects as a model system for studies of the evolution of animal mt genomes and outline some fundamental questions that may be addressed with this system... - Potential role of head lice, Pediculus humanus capitis, as vectors of Rickettsia prowazekiiD Robinson
Department of Microbiology and Parasitology, and Institute for Molecular Biosciences, University of Queensland, 4072 Brisbane, Australia
Parasitol Res 90:209-11. 2003..prowazekii in the field. Simple observations in the field would reveal whether or not head lice are natural vectors of this major human pathogen... - Proteins in the saliva of the Ixodida (ticks): pharmacological features and biological significanceN A Steen
Institute for Molecular Bioscience, University of Queensland, Brisbane, 4072, Australia
Toxicon 47:1-20. 2006..Sequence comparisons are illustrated. The importance of tick saliva and the significance of the findings to date are also discussed... - The mitochondrial 12S gene is a suitable marker of populations of Sarcoptes scabiei from wombats, dogs and humans in AustraliaL F Skerratt
School of Veterinary Science, The University of Melbourne, Werribee, Victoria, Australia
Parasitol Res 88:376-9. 2002..These data show that the mitochondrial 12S rRNA gene may be a suitable population marker of S. scabiei from wombats, dogs and humans in Australia... - Infestation of people with lice in Kathmandu and Pokhara, NepalS K S Poudel
Department of Science, Janapriya Multiple Campus, Pokhara, Nepal
Med Vet Entomol 18:212-3. 2004..Simultaneous infestations with head and body lice (double infestations) varied from 18% in slum children to 59% in street children... - Metalloproteases and egg-hatching in Pediculus humanus, the body (clothes) louse of humans (Phthiraptera: Insecta)V M Bowles
Centre for Animal Biotechnology, School of Veterinary Science, The University of Melbourne, Melbourne, 3010, Australia
Parasitology 135:125-30. 2008..The presence of metalloproteases at the time of egg-hatch and the inhibition of egg-hatch in P. humanus by metalloprotease inhibitors suggests a crucial role for these proteases in the hatching of this medically important parasite...