S
Sian Floyd
Researcher at University of London
Publications - 199
Citations - 7755
Sian Floyd is an academic researcher from University of London. The author has contributed to research in topics: Population & Medicine. The author has an hindex of 47, co-authored 163 publications receiving 6791 citations. Previous affiliations of Sian Floyd include University of Liverpool & University of Zambia.
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Journal ArticleDOI
Genome-wide association analyses identifies a susceptibility locus for tuberculosis on chromosome 18q11.2.
Thorsten Thye,Fredrik O. Vannberg,Sunny H. Wong,Ellis Owusu-Dabo,Ivy Osei,John O. Gyapong,Giorgio Sirugo,Fatou Sisay-Joof,Anthony Enimil,Margaret A. Chinbuah,Sian Floyd,D. K. Warndorff,Lifted Sichali,Simon Malema,Amelia C. Crampin,Bagrey Ngwira,Yik Y. Teo,Kerrin S. Small,Kirk A. Rockett,Dominic P. Kwiatkowski,Paul E. M. Fine,Philip C. Hill,Melanie J. Newport,Christian Lienhardt,Richard A. Adegbola,Tumani Corrah,Andreas Ziegler,Andrew P. Morris,Christian Meyer,Rolf D. Horstmann,Adrian V. S. Hill +30 more
TL;DR: This study demonstrates that genome-wide association studies can identify new susceptibility loci for infectious diseases, even in African populations, in which levels of linkage disequilibrium are particularly low.
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BCG-induced increase in interferon-gamma response to mycobacterial antigens and efficacy of BCG vaccination in Malawi and the UK: two randomised controlled studies
Gillian F. Black,Rosemary E. Weir,Sian Floyd,L. Bliss,D. K. Warndorff,Amelia C. Crampin,Bagrey Ngwira,Lifted Sichali,Bernadette Nazareth,Jenefer M. Blackwell,Keith Branson,Steven D. Chaguluka,Linda Donovan,Elizabeth R. Jarman,Elizabeth C. King,Paul E. M. Fine,Hazel M. Dockrell +16 more
TL;DR: The magnitude of the BCG-attributable increase in IFN-gamma responsiveness to M tuberculosis PPD, from before to 1 year post-vaccination, correlates better with the known levels of protection induced by immunisation with BCG than does the absolute value of the IFN -gamma or DTH response after vaccination.
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Population-level effect of HIV on adult mortality and early evidence of reversal after introduction of antiretroviral therapy in Malawi
Andreas Jahn,Sian Floyd,Amelia C. Crampin,Frank D. Mwaungulu,Hazzie Mvula,Fipson Munthali,Nuala McGrath,Johnbosco Mwafilaso,Venance Mwinuka,Bernard Mangongo,Paul E. M. Fine,Basia Zaba,Judith R. Glynn +12 more
TL;DR: The findings of a reduction in mortality in adults aged between 15 and 59 years, with no change in those older than 60 years, suggests that deaths from AIDS were averted by the rapid scale-up of free antiretroviral therapy in rural Malawi, which led to a decline in adult mortality that was detectable at the population level.
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Large-scale candidate gene study of leprosy susceptibility in the Karonga district of northern Malawi.
Jodene Fitness,Sian Floyd,D. K. Warndorff,Lifted Sichali,Lorren Mwaungulu,Amelia C. Crampin,Paul E. M. Fine,Adrian V. S. Hill +7 more
TL;DR: Heterozygosity for a newly studied CAAA insertion/deletion polymorphism in the 3'-untranslated region of solute carrier family 11, member 1 was associated with protection against TB in both HIV-positive and HIV-negative TB cases, suggesting that the SLC11A1 protein may have a role in innate TB immune responses that influence susceptibility even in immunocompromised individuals.
Journal ArticleDOI
Profile: the Karonga Health and Demographic Surveillance System.
Amelia C. Crampin,Albert Dube,Sebastian Mboma,Alison J Price,Menard Chihana,Andreas Jahn,Angela Baschieri,Anna Molesworth,Elnaeus Mwaiyeghele,Keith Branson,Sian Floyd,Nuala McGrath,Paul E. M. Fine,Neil French,Judith R. Glynn,Basia Zaba +15 more
TL;DR: The Karonga HDSS provides a structure for surveys of socio-economic status, HIV sero-prevalence and incidence, sexual behaviour, fertility intentions and a sampling frame for other studies, as well as evaluating the impact of interventions, such as antiretroviral therapy and vaccination programmes.