S
Stephen J. O'Brien
Researcher at Saint Petersburg State University of Information Technologies, Mechanics and Optics
Publications - 1074
Citations - 98793
Stephen J. O'Brien is an academic researcher from Saint Petersburg State University of Information Technologies, Mechanics and Optics. The author has contributed to research in topics: Population & Gene. The author has an hindex of 153, co-authored 1062 publications receiving 93025 citations. Previous affiliations of Stephen J. O'Brien include University College Cork & QIMR Berghofer Medical Research Institute.
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Journal ArticleDOI
Genetic factors leading to chronic Epstein-Barr virus infection and nasopharyngeal carcinoma in South East China: Study design, methods and feasibility
Xiu Chan Guo,Kevin Scott,Yan Liu,Michael Dean,Victor A. David,George W. Nelson,Randall C. Johnson,Holli H. Dilks,James A. Lautenberger,Bailey Kessing,Janice S. Martenson,Li Guan,Shan Sun,Hong Deng,Yuming Zheng,Jian Liao,Yi Zeng,Stephen J. O'Brien,Cheryl A. Winkler +18 more
TL;DR: A two-phase, population-based, case-control study of Han Chinese from Guangxi province, where the NPC incidence rate rises to a high of 25-50 per 100,000 individuals, and the Phase II study population has tripled patient enrolment and has included environmental covariates, offering the potential to validate the onset of NPC.
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Phylogeography and subspecies assessment of vicuñas in Chile and Bolivia utilizing mtDNA and microsatellite markers: implications for vicuña conservation and management
Ronald J. Sarno,Lilian Villalba,Cristian Bonacic,Benito A. González,Beatriz Zapata,David Donald,Stephen J. O'Brien,Warren E. Johnson +7 more
TL;DR: The moleculargenetic variation among four populations and both described subspecies is described and close genetic monitoring of animals that are (will be) maintained in captivity is suggested.
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The Population Origins and Expansion of Feral Cats in Australia
Peter S. Spencer,Andrey A. Yurchenko,Victor A. David,Rachael Scott,Klaus-Peter Koepfli,Carlos Driscoll,Stephen J. O'Brien,Marilyn Menotti-Raymond +7 more
TL;DR: Feral cats in continental Australia exhibit high genetic diversity in comparison with the low diversity found in populations of feral cats living on islands and Australian cats show modest if any population structure and a close genetic alignment with European feral cats.
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Seroprevalence of Bartonella infection in American free-ranging and captive pumas (Felis concolor) and bobcats (Lynx rufus).
Bruno B Chomel,Yoko Kikuchi,Janice S. Martenson,Melodie E. Roelke-Parker,Chao Chin Chang,Rickie W. Kasten,Janet E Foley,John Laudre,Kerry Murphy,Pamela K. Swift,Vicki L. Kramer,Stephen J. O'Brien +11 more
TL;DR: A serosurvey to investigate the role of American wild felids as a potential reservoir of Bartonella species suggests a potential role of wild felid in the epidemiological cycle of Bart onella henselae or closely related BartOnella species.
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Automated Single-Strand Conformation Polymorphism Reveals Low Diversity of a Major Histocompatibility Complex Class II Gene in the Threatened New Zealand Sea Lion
TL;DR: Single-strand conformation polymorphism analysis of the second exon of the DQB gene in the endemic New Zealand sea lion was automated using fluorescently-labelled PCR primers and a capillary sequencer and found only two alleles defined by changes at a single codon of this apparently functional locus.