Search

Your search keyword '"Barker, Stephen C."' showing total 181 results
Start Over Author "Barker, Stephen C." Search Limiters Peer Reviewed
181 results on '"Barker, Stephen C."'

12. Nuclear (18S-28S rRNA) and mitochondrial genome markers of Carios (Carios) vespertilionis (Argasidae) support Carios Latreille, 1796 as a lineage embedded in the Ornithodorinae: re-classification of the Carios sensu Klompen and Oliver (1993) clade into its respective subgenera

Author

Mans, Ben J., Kelava, Samuel, Pienaar, Ronel, Featherston, Jonathan, de Castro, Minique H., Quetglas, Juan, Reeves, Will K., Durden, Lance A., Miller, Myrna M., Laverty, Theresa M., Shao, Renfu, Takano, Ai, Kawabata, Hiroki, Moustafa, Mohamed Abdallah Mohamed, Nakao, Ryo, Matsuno, Keita, Greay, Telleasha L., Evasco, Kimberly L., Barker, Dayana, and Barker, Stephen C.

Published
2021
Full Text
View/download PDF

15. Insights from entire mitochondrial genome sequences into the phylogeny of ticks of the genera Haemaphysalis and Archaeocroton with the elevation of the subgenus Alloceraea Schulze, 1919 back to the status of a genus.

Author

Kelava, Samuel, Apanaskevich, Dmitry A., Shao, Renfu, Gofton, Alexander W., Mans, Ben J., Teo, Ernest J. M., Norval, Gerrut, Barker, Dayana, Nakao, Ryo, and Barker, Stephen C.

Subjects
WHOLE genome sequencing, PHYLOGENY, TICKS, GENOMES, MOLECULAR phylogeny
Abstract

We used entire mitochondrial (mt) genome sequences (14.5–15 kbp) to resolve the phylogeny of the four main lineages of the Haematobothrion ticks: Alloceraea, Archaeocroton, Bothriocroton and Haemaphysalis. In our phylogenetic trees, Alloceraea was the sister to Archaeocroton sphenodonti, a tick of an archetypal reptile, the tuatara, from New Zealand, to the exclusion of the rest of the species of Haemaphysalis. The mt genomes of all four of the Alloceraea species that have been sequenced so far had a substantial insert, 132–312 bp, between the tRNA‐Glu (E) gene and the nad1 gene in their mt genomes. This insert was not found in any of the other eight subgenera of Haemaphysalis. The mt genomes of 13 species of Haemaphysalis from NCBI GenBank were added to the most recent data set on Haemaphysalis and its close relatives to help resolve the phylogeny of Haemaphysalis, including five new subgenera of Haemaphysalis not previously considered by other authors: Allophysalis (structurally primitive), Aboimisalis (structurally primitive), Herpetobia (structurally intermediate), Ornithophysalis (structurally advanced) and Segalia (structurally advanced). We elevated Alloceraea Schulze, 1919 to the status of genus because Alloceraea Schulze, 1919 is phylogenetically distinct from the other subgenera of Haemaphysalis. Moreover, we propose that the subgenus Allophysalis is the sister to the rest of the Haemaphysalis (14 subgenera) and that the 'structurally primitive' subgenera Hoogstraal and Kim comprise early diverging lineages. Our matrices of the pairwise genetic difference (percent) of mt genomes and partial 16S rRNA sequences indicated that the mt genome sequence of Al. kitaokai (gb# OM368280) may not be Al. kitaokai Hoogstraal, 1969 but rather another species of Alloceraea. In a similar way, the mt genome sequence of H. (Herpetobia) nepalensis Hoogstraal, 1962 (gb# NC_064124) was only 2% genetically different to that of H. (Allophysalis) tibetensis Hoogstraal, 1965 (gb# OM368293): this indicates to us that they are the same species. Alloceraea cretacea may be better placed in a genus other than Alloceraea Schulze, 1919. Reptiles may have been the host to the most recent common ancestor of Archaeocroton and Alloceraea. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

16. Killing Clothes Lice by Holding Infested Clothes Away from Hosts for 10 Days to Control Louseborne Relapsing Fever, Bahir Dah, Ethiopia

Author

Barker, Stephen C. and Barker, Dayana

Subjects
Relapsing fever -- Health aspects, Clothing -- Health aspects, Lice -- Health aspects, Starvation -- Health aspects, Death, Hotels and motels, Refugees, African refugees, Health
Abstract

Louseborne relapsing fever (LBRF), which is caused by the spirochete Borrelia recurrentis, once had a cosmopolitan distribution but is now endemic only to countries in the Horn of Africa (Ethiopia, [...]

Published
2019
Full Text
View/download PDF

28. The abundance and geographic distributions of two species of ticks in South Australia: Bundey Bore revisited.

Author

Teo, Ernest J. M., Bull, C. Michael, Burzacott, Dale, Zalucki, Myron P., Furlong, Michael J., Barker, Dayana, and Barker, Stephen C.

Subjects
TICKS, SPECIES distribution, AUTUMN, AMBLYOMMA, IXODIDAE
Abstract

Perhaps one of the central questions in ecology has been what limits the geographic distribution of species. The geographic distributions of the reptile‐ticks Amblyomma limbatum, Bothriocroton hydrosauri and Amblyomma albolimbatum are a classic example of this problem: where these ticks meet, narrow regions‐of‐overlap often occur. Despite studies of interactions among these ticks, and of these ticks and their environment, we still do not understand what limits their geographic distributions. Many hypotheses have been proposed and tested, but all have seemingly been rejected. Our aim was to account for the abundance and the geographic distributions of A. limbatum and B. hydrosauri at Bundey Bore Station, South Australia, where these species come in contact and have been studied for over 35 years, leading to over 55 000 records of reptiles and their ticks using a capture‐mark‐recapture approach. We constructed models which had combinations of temperature and moisture indices from different months of the year to determine the relationship between climate and tick abundance, and between climate and the shifting local geographic distribution of A. limbatum and B. hydrosauri at Bundey Bore Station. We found that climate together with the abundance of ticks in the previous year and the abundance of the lizard host, accounted for 54%–77% of the variation in the abundance of A. limbatum and B. hydrosauri among years. We also found that the climate in late autumn to winter, together with the abundance of ticks and their host, accounted for 18%–84% of the variation in the geographic distributions of these ticks among years. Climate was central to the abundance and the geographic distributions of A. limbatum and B. hydrosauri at Bundey Bore Station. We speculate that the same mechanisms account for the geographic distributions of A. limbatum, B. hydrosauri and A. albolimbatum elsewhere in Australia; so, climate may explain the three‐tick problem in Austral ecology. [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

30. Genome sequences of the human body louse and its primary endosymbiont provide insights into the permanent parasitic lifestyle

Author

Kirkness, Ewen F., Haas, Brian J., Sun, Weilin, Braig, Henk R., Perotti, M. Alejandra, Clark, John M., Lee, Si Hyeock, Robertson, Hugh M., Kennedy, Ryan C., Elhaik, Eran, Gerlach, Daniel, Kriventseva, Evgenia V., Elsik, Christine G., Graur, Dan, Hill, Catherine A., Veenstra, Jan A., Walenz, Brian, Tubío, José Manuel C., Ribeiro, José M. C., Rozas, Julio, Johnston, J. Spencer, Reese, Justin T., Popadic, Aleksandar, Tojo, Marta, Raoult, Didier, Reed, David L., Tomoyasu, Yoshinori, Krause, Emily, Mittapalli, Omprakash, Margam, Venu M., Li, Hong-Mei, Meyer, Jason M., Johnson, Reed M., Romero-Severson, Jeanne, VanZee, Janice Pagel, Alvarez-Ponce, David, Vieira, Filipe G., Aguadé, Montserrat, Guirao-Rico, Sara, Anzola, Juan M., Yoon, Kyong S., Strycharz, Joseph P., Unger, Maria F., Christley, Scott, Lobo, Neil F., Seufferheld, Manfredo J., Wang, NaiKuan, Dasch, Gregory A., Struchiner, Claudio J., Madey, Greg, Hannick, Linda I., Bidwell, Shelby, Joardar, Vinita, Caler, Elisabet, Shao, Renfu, Barker, Stephen C., Cameron, Stephen, Bruggner, Robert V., Regier, Allison, Johnson, Justin, Viswanathan, Lakshmi, Utterback, Terry R., Sutton, Granger G., Lawson, Daniel, Waterhouse, Robert M., Venter, J. Craig, Strausberg, Robert L., Berenbaum, May R., Collins, Frank H., Zdobnov, Evgeny M., and Pittendrigh, Barry R.

Published
2010

34. International guidelines for effective control of head louse infestations

Author

Mumcuoglu, Kosta Y., Barker, Stephen C., Burgess, Ian F., Combescot-Lang, Catherine, Dalgleish, Robert C., Larsen, Kim S., Miller, Jacqueline, Roberts, Richard J., and Taylan-Ozkan, Aysegul

Subjects
Pediculosis -- Risk factors, Pediculosis -- Diagnosis, Pediculosis -- Care and treatment, Pediculosis -- Development and progression, Pediculosis -- Prevention, Health, Pharmaceuticals and cosmetics industries
Abstract

Abstract Head louse infestations are increasing or remain high in most countries. In order to reduce the proportion of children infested with head lice and slow down the emergence of [...]

Published
2007

42. Comparative mitogenomics elucidates the population genetic structure of Amblyomma testudinarium in Japan and a closely related Amblyomma species in Myanmar.

Author

Mohamed, Wessam Mohamed Ahmed, Moustafa, Mohamed Abdallah Mohamed, Thu, May June, Kakisaka, Keita, Chatanga, Elisha, Ogata, Shohei, Hayashi, Naoki, Taya, Yurie, Ohari, Yuma, Naguib, Doaa, Qiu, Yongjin, Matsuno, Keita, Bawm, Saw, Htun, Lat Lat, Barker, Stephen C., Katakura, Ken, Ito, Kimihito, Nonaka, Nariaki, and Nakao, Ryo

Subjects
AMBLYOMMA, IXODIDAE, SPECIES, TICKS, MITES, GENETIC distance, GENETIC code
Abstract

Ticks are the second most important vector capable of transmitting diseases affecting the health of both humans and animals. Amblyomma testudinarium Koch 1844 (Acari: Ixodidae), is a hard tick species having a wide geographic distribution in Asia. In this study, we analyzed the composition of A. testudinarium whole mitogenomes from various geographical regions in Japan and investigated the population structure, demographic patterns, and phylogeographic relationship with other ixodid species. In addition, we characterized a potentially novel tick species closely related to A. testudinarium from Myanmar. Phylogeographic inference and evolutionary dynamics based on the 15 mitochondrial coding genes supported that A. testudinarium population in Japan is resolved into a star‐like haplogroup and suggested a distinct population structure of A. testudinarium from Amami island in Kyushu region. Correlation analysis using Mantel test statistics showed that no significant correlation was observed between the genetic and geographic distances calculated between the A. testudinarium population from different localities in Japan. Finally, demographic analyses, including mismatch analysis and Tajima's D test, suggested a possibility of recent population expansion occurred within Japanese haplogroup after a bottleneck event. Although A. testudinarium has been considered widespread and common in East and Southeast Asia, the current study suggested that potentially several cryptic Amblyomma spp. closely related to A. testudinarium are present in Asia. [ABSTRACT FROM AUTHOR]

Published
2022
Full Text
View/download PDF

48. Borrelia recurrentis in head lice, Ethiopia

Author

Boutellis, Amina, Mediannikov, Oleg, Bilcha, Kassahun Desalegn, Ali, Jemal, Campelo, Dayana, Barker, Stephen C., and Raoult, Didier

Subjects
Trench fever -- Causes of, Borrelia -- Research -- Demographic aspects -- Health aspects, Disease transmission -- Methods -- Prevention, Epidemiology -- Research, Lice -- Health aspects, Health
Abstract

Humans are the sole hosts of the pubic louse (Pthirus pubis), the body louse (Pediculus humanus humanus), and the head louse (Pediculus humanus capitis) (1). The body louse can transmit [...]

Published
2013
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results