Dengue, which was first reported as a travel case in Nepal in 2004, was initially confined to the lower plains but has spread to higher elevations. Large outbreaks in 2022 and 2023, reached every district. We calculated the district-wise incidence for 2022 and 2023 by digitizing case data from Nepal’s Ministry of Health and Population […]
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Temperature shapes the geographic distribution, seasonality, and magnitude of mosquito-borne disease outbreaks. Models predicting transmission often use mosquito and pathogen thermal responses measured at constant temperatures. However, mosquitoes live in fluctuating temperatures. Rate summation––non-linear averaging of trait values measured at constant temperatures—is commonly used to infer performance in fluctuating environments, but its accuracy is rarely […]
Arboviruses transmitted mainly by Aedes (Stegomyia) aegypti and Ae. albopictus, including dengue, chikungunya, and Zika viruses, and yellow fever virus in urban settings, pose an escalating global threat. Existing risk maps, often hampered by surveillance biases, may underestimate or misrepresent the true distribution of these diseases and do not incorporate epidemiological similarities despite shared vector species. We address this by […]
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Global risk maps are an important tool for assessing the global threat of mosquito and tick-transmitted arboviral diseases. Public health officials increasingly rely on risk maps to understand the drivers of transmission, forecast spread, identify gaps in surveillance, estimate disease burden, and target and evaluate the impact of interventions. This paper describes how current approaches […]
Poisot, T., Becker, D. J., Brookson, C. B., Graeden, E., Ryan, S. J., Turon, G., & Carlson, C. (2025). Ten quick tips to build a Model Life Cycle. PLOS Computational Biology, 21(2), e1012731. ABSTRACT: This paper introduces the Model Life Cycle for biological data-driven research and develops a series of 10 quick tips aimed at facilitating collaborations […]
Borbor-Cordova, M., Ryan, S., Lowe, R., von Borries, R., & Stewart Ibarra, A. (2024). A Holistic Systems Approach to Global Health Research, Practice, and Partnerships. In Transforming Global Health Partnerships (pp. 51-65). Cham: Springer. ABSTRACT: Emerging and persistent infectious diseases are global threats that have evidenced the interconnectedness and interdependence of the environment, animal, and human systems. […]
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Villena, O. C., Arab, A., Lippi, C. A., Ryan, S. J., & Johnson, L. R. (2024). Influence of environmental, geographic, socio-demographic, and epidemiological factors on presence of malaria at the community level in two continents. Scientific Reports, 14(1), 16734. DOI: https://doi.org/10.1038/s41598-024-67452-5 Article first published online: 20 July 2024 in Scientific Reports ABSTRACT: The interactions of environmental, geographic, […]
UF Geography was well represented at this year’s Emerging Pathogens Institute (EPI) Research Day. Simrik Bhandari, a first year Masters student working in the Quantitative Disease Ecology and Conservation (QDEC) lab, presented a poster on the spatial patterns of dengue incidence in Nepal. Gavriella Hecht, a second-year PhD student in the Quantitative Disease Ecology […]
Dr. Sadie Ryan Associate Professor Department of Geography University of Florida Thursday, February 8, 2024 3:00-3:50 PM (Period 8) Recorded for YouTube Turlington Hall 3018 and Zoom University of Florida Abstract: From restoration of vernal pool habitat, to the struggle for oil in a biodiversity hotspot, to measuring nutritional limits to herbivores in an iconic […]
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LIPPI, MUNDIS, SIPPY, FLENNIKEN, CHAUDHARY, HECHT, RYAN – Trends in mosquito species distribution modeling: insights for vector surveillance and disease control Catherine Lippi, Stephanie Mundis, Rachel Sippy, Matthew Flenniken, Anusha Chaudhary, Gavriella Hecht, Colin Carlson, Sadie Ryan Article first published online: 28 August 2023 DOI: https://doi.org/10.1186/s13071-023-05912-z ABSTRACT: Species distribution modeling (SDM) has become an increasingly common […]
Speaker: Dr. Sadie Ryan Associate Professor Department of Geography University of Florida Thursday, March 2, 2023 3:00-3:50 PM (Period 8) Recorded for YouTube Turlington Hall 3018 and Zoom University of Florida Abstract: This talk is an overview of work from around a decade of collaborations on ecophysiological models of thermal responses of mosquito borne diseases, and […]
LIPPI, RYAN – Characterizing the Vector Data Ecosystem Catherine Lippi, Samuel Rund, Sadie Ryan Article first published online: 8 February 2023 DOI: https://doi.org/10.1093/jme/tjad009 ABSTRACT: A growing body of information on vector-borne diseases has arisen as increasing research focus has been directed towards the need for anticipating risk, optimizing surveillance, and understanding the fundamental biology of […]
SOUTHWORTH, RYAN, HERRERO, KHATAMI, BUNTING, HASSAN, MUIR, WAYLEN – Latitudes and land use: Global biome shifts in vegetation persistence across three decades Jane Southworth, Sadie J. Ryan, Hannah V. Herrero, Reza Khatami, Erin L. Bunting, Mehedy Hassan, Carly S. Muir, Peter Waylen Article first published online: 18 January 2023 DOI: https://doi.org/10.3389/frsen.2023.1063188 ABSTRACT: The dynamics of terrestrial […]
BHATTARAI, BLACKBURN, RYAN – Malaria transmission in Nepal under climate change: anticipated shifts in extent and season, and comparison with risk definitions for intervention Shreejana Bhattarai, Jason K. Blackburn, & Sadie J. Ryan Article first published online: 22 December 2022 DOI: https://doi.org/10.1186/s12936-022-04417-x ABSTRACT: Background: Climate and climate change affect the spatial pattern and seasonality of malaria risk. […]
RYAN – Population distribution within the human climate niche Barry Klinger, Sadie J Ryan Article first published online: 9 November 2022 DOI: https://doi.org/10.1371/journal.pclm.0000086 ABSTRACT: Climate change may pose an acute threat to humanity due to physical and biological constraints on regional habitability. A recent study proposed that the human climate niche is a narrow segment […]
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RYAN – Mosquito Net Fishing as a Normal Accident and the Roles of Traditional and Bureaucratic Authority Rick Welsha, Elizabeth A. Pickard, Sadie J. Ryan, Joseph H. Bisesi Jr, Joseph Makaure, Donald J. Stewart, David A. Larsen Article first published online: 3 November 2022 DOI: doi.org/10.1080/08941920.2022.2139443 ABSTRACT: In the 1980s, malaria researchers experimented with treating mosquito nets […]
MUNDIS, RYAN – Spatiotemporal Environmental Drivers of Eastern Equine Encephalitis Virus in Central Florida: Towards a Predictive Model for a Lethal Disease Stephanie J Mundis, Steve Harrison, Dave Pelley, Susan Durand, Sadie J Ryan Article first published online: 12 August 2022 DOI: https://doi.org/10.1093/jme/tjac113 ABSTRACT: Eastern equine encephalitis virus (EEEV) is a mosquito-borne virus that affects […]
RYAN – Temperature impacts the environmental suitability for malaria transmission by Anopheles Gambian and Anopheles stephensi Oswaldo C. Villena, Sadie J. Ryan, Courtney C. Murdock, Leah R. Johnson Article first published online: 22 March 2022 DOI: https://doi.org/10.1002/ecy.3685 ABSTRACT: Extrinsic environmental factors influence the spatio-temporal dynamics of many organisms, including insects that transmit the pathogens responsible for vector-borne […]
RYAN – Global Economic and Diet Transitions Drive Latin American and Caribbean Forest Change during the First Decade of the Century: A Multi-Scale Analysis of Socioeconomic, Demographic, and Environmental Drivers of Local Forest Cover Change David Lopez-Carr, Sadie J Ryan, Matthew L Clark Article first published online: 21 Jan 2022 DOI: https://doi.org/10.3390/land11030326 ABSTRACT: Latin America and the Caribbean […]
RYAN, LIPPI – Co-learning during the co-creation of a dengue early warning system for the health sector in Barbados Anna M Stewart-Ibarra, Leslie Rollock, Sabu Best, Tia Brown, Avriel R Diaz, Willy Dunbar, Catherine A Lippi, Roche Mahon, Sadie J Ryan, Adrian Trotman, Cedric J Van Meerbeeck, Rachel Lowe Article first published online: 6 Jan 2022 […]
Philosophical Transactions of the Royal Society B RYAN – The Future of Zoonotic Risk Prediction Colin J. Carlson, Maxwell J. Farrell, Zoe Grange, Barbara A. Han, Nardus Mollentze, Alexandra L. Phelan, Angela L. Rasmussen, Gregory F. Albery, Bernard Bett, David M. Brett-Major, Lily E. Cohen, Tad Dallas, Evan A. Eskew, Anna C. Fagre, Kristian M. Forbes, Rory Gibb, Sam Halabi, Charlotte C. Hammer, Rebecca Katz, Jason Kindrachuk, Renata L. Muylaert, Felicia B. Nutter, Joseph Ogola, Kevin J. Olival, Michelle […]
International Journal of Environmental Research and Public Health HAMERLINCK, MUNDIS, RYAN – Examining Wing Length–Abundance Relationships and Pyrethroid Resistance Mutations among Aedes albopictus in a Rapidly Growing Urban Area with Implications for Mosquito Surveillance and Control Stephanie J. Mundis, Gabriela Hamerlinck, Emily K. Stone, Ari Whiteman, Eric Delmelle, Tyler Rapp, Michael Dulin, and Sadie J. […]
GAINESVILLE, FL – Climate variation and seasonality affect transmission and control of Zika, a study by Dr. Calistus Ngonghala (UF Mathematics, Emerging Pathogens Institute), Dr. Sadie J. Ryan (UF Geography, Emerging Pathogens Institute), and colleagues at the University of Georgia, Stanford University, and Harvard University has found. By comparing experimental Zika transmission data to annual […]
RYAN – Effects of changes in temperature on Zika dynamics and control Article first published online: 05 MAY 20212 Journal of the Royal Society Interface DOI: 10.1098/rsif.2021.0165 ABSTRACT: When a rare pathogen emerges to cause a pandemic, it is critical to understand its dynamics and the impact of mitigation measures. We use experimental data to […]
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Medical geography, an important area of health research, applies concepts, methods, and techniques from geography to investigate health-related topics across the world, focusing on spatial aspects of human and animal (livestock and wildlife) disease and health intervention. Sub-areas One Health Risk Mapping Disease Modeling Zoonotic Emergence Spatial Health Disparities Public Health Interventions Spatial Epidemiology Analysis […]
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This is the science of the atmosphere, land, biota, and water from a geospatial perspective. By combining contemporary issues such as climate change, environmental extremes, and hazards, this focus area emphasizes the integrative nature of physical and environmental geography. Earth systems scientists use biophysical understanding to identify and solve problems for management and policy. Sub-areas […]
The UF Geography Department is sending a large (virtual) contingent to Seattle for the 2021 meeting of the American Association of Geographers Find out where you can see a GeoGator present their research below: Panelist Joel Correia Panel title: Querying nature, colonialism and decolonialism Date & Time: April 7, 8:00am-9:15am Talk Presentation Session title: Roads, […]
Geography is a diverse field. Throughout the month of March, we will be highlighting the work of Women Geographers, some of whom are #GeoGators. Tierney Shimansky Tierney is a Master’s student who studies land management and conservation in southern Africa. Dr. Yin-Hsuen Chen Yin-Hsuen is a fluvial geomorphologist and Postdoctoral Researcher at the University of […]
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LIPPI, RYAN, WHITE – Scoping review of distribution models for selected Amblyomma ticks and rickettsial group pathogens Catherine A. Lippi, Holly D. Gaff, Alexis L. White, and Sadie J. Ryan Article first published online: 17 FEB 2021 PeerJ DOI: 10.7717/peerj.10596 ABSTRACT: The rising prevalence of tick-borne diseases in humans in recent decades has called attention to […]
In observation of the 6th International Day of Women & Girls in Science, we celebrate the scientific contributions of female GeoGators – grad students, postdocs, and faculty.
RYAN – Implications of Insecticide-Treated Mosquito Net Fishing in Lower Income Countries David A. Larsen, Joseph Makaure, Sadie J. Ryan, Donald Stewart, Adrianne Traub, Rick Welsh, Deirdre H. Love, and Joseph H. Bisesi Jr Article first published online: 8 JAN 2021 Environmental Health Perspectives DOI: 10.1289/EHP7001 ABSTRACT: Introduction: Insecticide-treated mosquito nets (ITNs) are highly effective […]
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Medical Geographer Dr. Sadie Ryan‘s work was recently discussed in How Climate Change Is Ushering in a New Pandemic Era: A warming world is expanding the range of deadly diseases and risking an explosion of new zoonotic pathogens from the likes of bats, mosquitoes, and ticks by Jeff Goodell in Rolling Stone magazine: “A recent […]
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Florida and Texas have ideal conditions for tropical diseases, Medical Geographer Dr. Sadie Ryan (Florida Climate Institute, Emerging Pathogens Institute) recently told Channel News Asia’s Disease Hunters: Mosquito Mayhem. Learn more about the global effort to detect – and prevent – the spread of infectious diseases at Disease Hunters: Mosquito Mayhem.
RYAN – Building resilience to mosquito-borne diseases in the Caribbean Rachel Lowe, Sadie J. Ryan, Roché Mahon, Cedric J. Van Meerbeeck, Adrian R. Trotman, Laura-Lee G. Boodram, Mercy J. Borbor-Cordova, Anna M. Stewart-Ibarra Article first published online: 24 NOV 2020 PLOS Biology DOI: 10.1371/journal.pbio.3000791 ABSTRACT: Small island developing states in the Caribbean are among the […]
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The latest publication led by SEER Lab #MedGeo M.S. Alum, and full-time Spatial Epidemiologist Morgan Walker is available in Royal Society Open Science. In this study, Walker and others examined how ungulates, primarily plains bison and elk, use animal carcasses on the Montana landscape. Working with SEER Lab partners at Turner Enteprises, Inc. (TEI) out […]
BLACKBURN, RYAN, URIBASTERRA, WALKER – Ungulate use of locally infectious zones in a re-emerging anthrax risk area Morgan A. Walker, Maria Uribasterra, Valpa Asher, José Miguel Ponciano, Wayne M. Getz, Sadie J. Ryan, and Jason K. Blackburn Article first published online: 21 OCT 2020 Royal Society Open Access DOI: 10.1098/rsos.200246 ABSTRACT: Environmentally mediated indirect pathogen […]
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SEER Lab and QDEC Lab‘s latest publication in the Journal of Wildlife Management examines resource selection and anthrax risk in female elk in southwestern Montana. This paper, led by SEER Lab and Geography #MedGeo alum Dr. Anni Yang, builds on previous work defining male elk resource selection in the same study area and compares females […]
Read more "Latest SEER Lab and QDEC Lab publication defines sex-specific anthrax risk for elk"
BLACKBURN, RYAN, YANG – Sex-Specific Elk Resource Selection during the Anthrax Risk Period Anni Yang, Kelly M. Proffitt, Valpa Asher, Sadie J. Ryan, Jason K. Blackburn Article first published online: 01 OCT 2020 The Journal of Wildlife Management DOI: 10.1002/jwmg.21952 ABSTRACT: Anthrax, caused by the spore-forming bacterium Bacillus anthracis, is a zoonosis affecting animals and […]
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RYAN – Climate change could shift disease burden from malaria to arboviruses in Africa Erin A Mordecai, Sadie J Ryan, Jamie M Caldwell, Melisa M Shah, A Desiree LaBeaud Article first published online: 09 SEPT 2020 The Lancet Planetary Health DOI: 10.1016/S2542-5196(20)30178-9 SUMMARY Malaria is a long-standing public health problem in sub-Saharan Africa, whereas arthropod-borne […]
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RYAN – Mapping Thermal Physiology of Vector-Borne Diseases in a Changing Climate: Shifts in Geographic and Demographic Risk of Suitability Sadie J. Ryan Article first published online: 09 SEPT 2020 Current Environmental Health Reports (2020) DOI: 10.1007/s40572-020-00290-5 Purpose of Review To describe a collection of recent work published on thermal suitability for vector-borne diseases, in […]
RYAN – Comparing prioritization strategies for delivering indoor residual spray (IRS) implementation, using a network approach AUTHOR LIST Article first published online: SEPT 2020 Malaria Journal DOI: 10.1186/s12936-020-03398-z Background Indoor residual spraying (IRS) is an effective method to control malaria-transmitting Anopheles mosquitoes and often complements insecticide-treated mosquito nets, the predominant malaria vector control intervention. With insufficient funds […]
GAINESVILLE, FL – Misconceptions about the way climate and weather impact exposure and transmission of SARS-CoV-2, the virus that causes COVID-19, create false confidence and have adversely shaped risk perceptions, say a team including University of Florida researcher Dr. Sadie Ryan. “Future scientific work on this politically-fraught topic needs a more careful approach,” write the […]
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GAINESVILLE, FL – Researchers and clinicians in Ecuador face a challenging environment: this biodiverse country is home to many disease hosts and vectors. Particularly, the mosquitoes in Ecuador carry and transmit arboviruses (arthropod-borne viruses). This group includes diseases like dengue, chikungunya, Mayaro virus, yellow fever, and Zika, among others. All are spread by overlapping mosquito species. […]
Read more "Summarizing the Research and Knowledge Gaps for Mosquito-borne Arboviruses in Ecuador"
RYAN – Misconceptions about weather and seasonality must not misguide COVID-19 response Colin J. Carlson, Ana C. R. Gomez, Shweta Bansal & Sadie J. Ryan Article first published online: 27 AUG 2020 Nature Communications ABSTRACT: Weather may marginally affect COVID-19 dynamics, but misconceptions about the way that climate and weather drive exposure and transmission have […]
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A new 5-year NSF Division of Biological Infrastructure, awarded to Sadie J. Ryan (University of Florida), Leah R. Johnson (Virginia Tech), and Samuel Rund (University of Notre Dame), in collaboration with Samraat Pawar (Imperial College London), is launching in August 2020. This new initiative – VectorByte – will establish a global open access data platform […]
RYAN – Age influences the thermal suitability of Plasmodium falciparum transmission in the Asian malaria vector Anopheles stephensi K. L. Miazgowicz, M. S. Shocket, S. J. Ryan, O. C. Villena, R. J. Hall, J. Owen, T. Adanlawo, K. Balaji, L. R. Johnson, E. A. Mordecai, and C. C. Murdock Article first published online: 22 JUL […]
JAMES, RYAN – Measuring dimensions of HIV-related stigma among college students James, T. G., Gebru, N. M., Ryan, S. J., & Cheong, J. Article first published online: 25 JUN 2020 Stigma and Health DOI: 10.1037/sah0000266 ABSTRACT: HIV-related stigma remains a critical barrier to achieving national public health objectives including reducing HIV transmissions and retaining people living […]
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Dr. Sadie Ryan‘s paper Global expansion and redistribution of Aedes-borne virus transmission risk with climate change in PLoS Neglected Tropical Diseases, was included as the March entry for the Best of PLOS 2019 list. From the announcement: March: Climate change may mean more mosquito-borne diseases worldwide OK, this paper isn’t particularly calming–but it is timely and relevant. Researchers in PLOS […]
WLRN spoke with Dr. Sadie Ryan, an associate professor of medical geography at the University of Florida. She talked about what we can learn from these studies now that we’re living in a pandemic in a story titled New Study Says Deforestation Could Help Viruses Jump From Animals To Humans, Amid COVID-19 Pandemic.
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New publication in Land Use Policy explores the relationship between demographic and economic changes and forest cover change in Mexico from 2001-2010. In this collaboration between UF Geography’s Sadie J. Ryan and researchers from UCSB and CU Boulder, drivers of sub-national level forest cover change from 2001-2010 – both loss and gain – were explored […]
GAINESVILLE, FL – University of Florida Associate Professor of Medical Geography Dr. Sadie Ryan (Emerging Pathogens Institute, Quantitative Disease Ecology & Conservation Lab) spoke with WUFT News about vector-borne disease in the time of coronavirus in Flying Under the Radar. “It’s not like mosquitoes went on hold because of COVID,” she said. “The message needs to stay alive.” […]
MUNDIS, RYAN – Spatial variation in the frequency of knockdown resistance genotypes in Florida Aedes aegypti populations Stephanie J. Mundis, Alden S. Estep, Christy M. Waits, & Sadie J. Ryan Article first published online: 11 MAY 2020 Parasites & Vectors DOI: 10.1186/s13071-020-04112-3 ABSTRACT: Background The development of insecticide resistance in disease-vectoring mosquito species can lead […]
RYAN – Conservation in the maelstrom of COVID-19 – a call to action to solve the challenges, exploit opportunities and prepare for the next pandemic K.L. Evans J.G. Ewen G. Guillera-Arroita J.A. Johnson V. Penteriani S.J. Ryan R. Sollmann I.J. Gordon Article first published online: 05 MAY 2020 Animal Conservation DOI: 10.1111/acv.12601 ABSTRACT: As we […]
GAINESVILLE, FL – In a new paper in Malaria Journal “Shifting transmission risk for malaria in Africa with climate change: a framework for planning and intervention”, part of a cross-journal collection on the Contribution of Climate Change to Spread of Infectious Disease, QDEC’s Sadie J. Ryan, along with Cat A. Lippi and collaborator Fernanda Zermoglio […]
Read more "New study shows how malaria risk will shift in Africa under climate change"
The Department of Geography Commencement for the GeoGator Class of 2020 was held online for the very first time on the 2nd of May, 2020. Watch the whole ceremony here! https://youtu.be/Z5_jfndqzrg Excerpts Dr. Jane Southworth addresses GeoGator Class of 2020 Dunkle Award Winner Sara Shir addresses GeoGator Class of 2020 Dr. Jason Blackburn addresses GeoGator Class […]
LIPPI, RYAN – Shifting transmission risk for malaria in Africa with climate change: a framework for planning and intervention Sadie J. Ryan, Catherine A. Lippi, & Fernanda Zermoglio Article first published online: 01 MAY 2020 Malaria Journal DOI: 10.1186/s12936-020-03224-6 ABSTRACT: Background Malaria continues to be a disease of massive burden in Africa, and the public […]
LIPPI, RYAN – Spatiotemporal Tools for Emerging and Endemic Disease Hotspots in Small Areas: An Analysis of Dengue and Chikungunya in Barbados, 2013–2016 Catherine A. Lippi, Anna M. Stewart-Ibarra, Moory Romero, Avery Q. J. Hinds, Rachel Lowe, Roché Mahon, Cedric J. Van Meerbeeck, Leslie Rollock, Marquita Gittens-St. Hilaire, Adrian R. Trotman, Dale Holligan, Shane Kirton, […]
GAINESVILLE, FL – Helping patients with dengue can be challenging – especially in countries with multiple diseases spread by mosquitoes. Dengue, chikungunya, and Zika are viruses spread by the same type of mosquito; all three viruses are present in Ecuador and many other countries in Latin America and the Caribbean. Patients infected with one of […]
Read more "Machine Learning Predictions of Dengue Patients Outcomes Yield Promising Results"
GAINESVILLE, FL – Fighting mosquito-borne disease can be costly – in both health and financial resources. While mosquito control is an effective way to combat the spread of diseases like dengue fever, the cost of spraying every house in a city quickly adds up. These costs limit public health vector control programs, which often operate […]
SIPPY, RYAN – Severity Index for Suspected Arbovirus (SISA): Machine learning for accurate prediction of hospitalization in subjects suspected of arboviral infection Rachel Sippy, Daniel F. Farrell, Daniel A. Lichtenstein, Ryan Nightingale, Megan A. Harris, Joseph Toth, Paris Hantztidiamantis, Nicholas Usher, Cinthya Cueva Aponte, Julio Barzallo Aguilar, Anthony Puthumana, Christina D. Lupone, Timothy Endy, Sadie […]
MedGeo researchers from the Quantitative Disease Ecology & Conservation Lab (QDEC Lab) and Spatial Epidemiology & Ecology Research Laboratory (SEER Lab) made a strong showing at Emerging Pathogens Institute‘s EPI Research Day 2020!
BLACKBURN, LIPPI, MAO, RYAN – A network analysis framework to improve the delivery of mosquito abatement services in Machala, Ecuador Catherine A. Lippi, Liang Mao, Anna M. Stewart-Ibarra, Naveed Heydari, Efraín Beltrán Ayala, Nathan D. Burkett-Cadena, Jason K. Blackburn & Sadie J. Ryan Article first published online: 11 FEB 2020 International Journal of Health Geographics […]
RYAN – SHIFTING RISKS OF MALARIA IN SOUTHERN AFRICA – A REGIONAL ANALYSIS Sadie Ryan, Anna Steynor, Chris Jack, Piotr Wolski, Lisa van Aardenne, Chris Lennard, and Fernanda Zermoglio Article first published online: 1 FEB 2020 USAID Technical Report EXECUTIVE SUMMARY Temperature impacts both the life cycle and habitat of malaria-carrying mosquitoes (genus Anopheles) and […]
Read more "Shifting Risks Of Malaria In Southern Africa – A Regional Analysis"
RYAN – Briefing Note: Shifting Burdens: Malaria Risk under Rising Temperatures in Botswana Sadie Ryan and Fernanda Zermoglio Article first published online: 1 FEB 2020 USAID Briefing Note INTRODUCTION This briefing note provides health practitioners and development planners with information on the shifting pattern of malaria incidence nationally and regionally in Botswana as temperatures rise. The […]
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RYAN – THE INFLUENCE OF CLIMATE ON MALARIA INCIDENCE IN MALAWI A RETROSPECTIVE ANALYSIS Anna Steynor, Chris Jack, Piotr Wolski, Lisa van Aardenne, Chris Lennard, Sadie J. Ryan, Kris Ebi, Lindsay Allen, Nick Graff, and Fernanda Zermoglio Article first published online: 1 FEB 2020 USAID Technical Report EXECUTIVE SUMMARY This report outlines the results of a […]
Read more "The Influence of Climate on Malaria Incidence in Malawi – A Retrospective Analysis"
Speaker: Dr. Sadie Ryan Associate Professor, Department of Geography, University of Florida Thursday, January 16, 2020 2:50-3:50 PM (Period 8) Turlington Hall Room 3018 University of Florida All are welcome to attend. Forecasting the impacts of climate change on vector-borne diseases (VBDs)—especially those under current public scrutiny and concern, such as malaria, dengue, chikungunya, and […]
RYAN – Examining the relationship between migration and forest cover change in Mexico from 2001 to 2010 Daniel Ervin, David Lopéz-Carr, Fernando Riosmena, Sadie J.Ryan Article first published online: 25 NOV 2019 Land Use Policy DOI: 10.1016/j.landusepol.2019.104334 ABSTRACT: This project examines the relationship between migration, population, and economic processes, and forest cover change in Mexico […]
RYAN – Examining the relationship between migration and forest cover change in Mexico from 2001 to 2010 Daniel Ervin, David Lopéz-Carr, Fernando Riosmena, & Sadie J.Ryan Article first published online: 25 NOV 2019 Land Use Policy DOI: 10.1016/j.landusepol.2019.104334 ABSTRACT: This project examines the relationship between migration, population, and economic processes, and forest cover change in […]
RYAN – Plague in a Changing Environment: A Literature Review for Madagascar Sadie Ryan and Fernanda Zermoglio Article first published online: 1 SEP 2019 USAID Technical Report EXECUTIVE SUMMARY This review identifies environmental factors that contribute to the emergence of plague and plague dynamics in Madagascar and aims to identify the potential implications for decisionmaking and […]
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GAINESVILLE – In the battle against vector borne disease, mosquito control using insecticides is an essential tool. But what happens when that tool starts to fail, and how do you know it? Insecticides are regularly used by public health agencies to reduce populations of blood-sucking mosquitoes. Effective control programs are important to public health because, […]
Read more "Insecticide Resistance Threatens the Control of Mosquito-Borne Disease in Ecuador"
LIPPI, MUNDIS, RYAN, SIPPY – Seasonal and geographic variation in insecticide resistance in Aedes aegypti in southern Ecuador Sadie J. Ryan, Stephanie J. Mundis, Alex Aguirre, Catherine A. Lippi, Efraín Beltrán, Froilán Heras, Valeria Sanchez, Mercy J. Borbor-Cordova, Rachel Sippy, Anna M. Stewart-Ibarra , Marco Neira Article first published online: 10 JUN 2019 PLoS Neglected […]
GAINESVILLE – Blood sucking insects such as the Yellow fever mosquito, Aedes aegypti, are more than just a nuisance in Ecuador, they also spread diseases such as dengue fever, chikungunya and Zika. A warming world means that public health officials must decide where to direct surveillance and mosquito control efforts not only today, but also […]
Read more "New maps show where mosquitoes will invade Ecuador’s Andes mountains"
GAINESVILLE, FL – With its turquoise waters and abundant wildlife, Ecuador’s Galapagos Islands have long been a vacation dream of many. Tourist guides highlight playful sea lions and giant tortoises, but they do not talk about the mosquitoes. For the more than 30,000 people who live there, emerging epidemics of mosquito-borne disease such as dengue, […]
Read more "Social-Ecological Factors Drive Dengue and Mosquito Presence in the Galapagos"
Congratulations to Emily Stone, recipient of an Emerging Scholars Award from the University of Florida’s Center for Undergraduate Research! The Emerging Scholars program supports early undergraduate students who are interested in adding a research experience to their curriculum. The award provides two semesters of support to work on a research project with a UF faculty […]
Second-year PhD student Stephanie Mundis of the Quantitative Disease Ecology & Conservation Lab, advised by Dr. Sadie Ryan, was recognized for her paper and presentation at the 2018 SouthEastern Division of the American Association of Geographers. Her presentation, “Spatial analysis of pyrethroid resistance genotypes in Aedes aegypti mosquitoes in Florida,” focused on spatial patterns in […]
Read more "Geography Grad student receives best PhD paper at the 2018 SEDAAG annual meeting!"
In observation of Ada Lovelace Day (9 October), the ZSL journal Animal Conservation asked their female editors to reflect on what inspired them to become scientists. UF’s Dr. Sadie Ryan had this to say: What inspired you to pursue a career in science?
RYAN – Temperature explains broad patterns of Ross River virus transmission Marta Strecker Shocket, Sadie J Ryan, Erin A Mordecai Article first published online: 28 AUG 2018 eLife DOI: 10.7554/eLife.37762.001 ABSTRACT: Thermal biology predicts that vector-borne disease transmission peaks at intermediate temperatures and declines at high and low temperatures. However, thermal optima and limits remain […]
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GAINESVILLE, FL – New model that accurately predicts patterns of mosquito-borne Ross River virus epidemics could help prepare for the impact of climate change. Scientists have built a model that predicts how temperature affects the spread of Ross River virus, a common mosquito-borne virus in Australia, according to a report in the journal eLife. The […]
Read more "Temperature model predicts regional and seasonal virus transmission by mosquitoes"
GAINESVILLE, FL – Amidst global amphibian population collapses, ranavirus causes up to 90% mortality in amphibians, undermining conservation efforts and wetland. restoration projects. In a recent study University of Florida Medical Geography researchers identified important variables to measure in assessments of ranaviral infection risk in newly constructed ponds which are important components of wetland restoration. […]
RYAN – Temperature drives Zika virus transmission: evidence from empirical and mathematical models Blanka Tesla, Leah R. Demakovsky, Erin A. Mordecai, Sadie J. Ryan, Matthew H. Bonds, Calistus N. Ngonghala, Melinda A. Brindley, Courtney C. Murdock Article first published online: 15 AUG 2018 Proceedings of the Royal Society B DOI: 10.1098/rspb.2018.0795 ABSTRACT: Temperature is a […]
GAINESVILLE, FL – A University of Florida Medical Geography researcher recently participated in a study that found that current estimates of Zika virus transmission vastly over predict its possible range. Temperature is a major driver of vector-borne disease transmission, but current transmission models rely on untested assumptions about life history of Zika infected Aedes aegypti […]
RYAN, BOERSCH-SUPAN – Environmental Drivers of Ranavirus in Free-Living Amphibians in Constructed Ponds Tess E. Youker-Smith, Philipp H. Boersch-Supan, Christopher M. Whipps, Sadie J. Ryan Article first published online: 09 AUG 2018 EcoHealth DOI: 10.1007/s10393-018-1350-5 ABSTRACT: Amphibian ranaviruses occur globally, but we are only beginning to understand mechanisms for emergence. Ranaviruses are aquatic pathogens which […]
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LIPPI, RYAN – Nonlinear and delayed impacts of climate on dengue risk in Barbados: A modelling study Rachel Lowe, Antonio Gasparrini, Cédric J. Van Meerbeeck, Catherine A. Lippi, Roché Mahon, Adrian R. Trotman, Leslie Rollock, Avery Q. J. Hinds, Sadie J. Ryan, Anna M. Stewart-Ibarra Article first published online: 17 JUL 2018 PLOS Medicine DOI: […]
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GAINESVILLE, FL – Medical Geography researchers from the University of Florida recently participated in a study that successfully predicted dengue fever outbreaks on the Caribbean island of Barbados, using climate data. This paper is part of a special issue of PLOS MEDICINE, focusing on the impacts of climate change on health, and is a result […]
Read more "UF Researchers Make New Strides in Predicting Dengue Fever Outbreaks"
BUNTING, SOUTHWORTH, HERRERO, RYAN, WAYLEN – Understanding Long-Term Savanna Vegetation Persistence across Three Drainage Basins in Southern Africa Erin L. Bunting , Jane Southworth, Hannah Herrero, Sadie J. Ryan, and Peter Waylen Article first published online: 25 JUN 2018 Remote Sens. 2018, 10(7), 1013 DOI: 10.3390/rs10071013 ABSTRACT: Across savanna landscapes of southern Africa, people are […]
The UF Geography Department is sending a large contingent to New Orleans for the 2018 meeting of the American Association of Geographers Find out where you can see a GeoGator present their research below: Anthropogenic change to fluvial systems, I Geomorphology Specialty Group, Paleoenvironmental Change Specialty Group, Water Resources Specialty Group 4/10/2018 8:20 AM Balcony […]
DOWHANIUK, GOLDMAN, RYAN – Park isolation in anthropogenic landscapes: land change and livelihoods at park boundaries in the African Albertine Rift Jonathan Salerno, Colin A. Chapman, Jeremy E. Diem, Nicholas Dowhaniuk, Abraham Goldman, Catrina A. MacKenzie, Patrick Aria Omeja, Michael W. Palace, Rafael Reyna-Hurtado, Sadie J. Ryan, Joel Hartter Article first published online: 14 NOV 2017 Regional […]
Dr. Sadie Ryan named 2017 Faculty Fellow of the Florida Climate Institute at the University of Florida. The Florida Climate Institute Faculty Fellow award programs recognizes University of Florida faculty who are making outstanding research, extension, or education contributions to these Institutes. The purpose of these awards is to recognize contributions that contribute significantly to […]
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GAINESVILLE, FL – New research co-authored by UF Geography’s Dr. Sadie Ryan and Ms. Cat Lippi sheds light on the climate suitability for Aedes aegypti and Aedes albopictus mosquitos and transmission rates of Zika, chikungunya, and dengue fever. The study, published in PLOS Neglected Tropical Diseases compares new data driven models of Zika, chikungunya, and dengue […]
Read more "New research models temperature-driven Zika, dengue, and chikungunya transmission"
GAINESVILLE – With a $10 million grant from the Centers for Disease Control and Prevention, the University of Florida will lead a highly collaborative research program focused on stopping vector-borne diseases such as Zika before they spread farther into the United States. Key leadership for the Southeast Regional Center of Excellence in Vector-Borne Disease will […]
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RYAN – Detection of an FV3-like Ranavirus in Wood Frogs (Lithobates sylvaticus) and Green Frogs (Lithobates clamitans) in a Constructed Vernal Pool Network in Central New York State TESS E. YOUKER-SMITH, CHRISTOPHER M. WHIPPS, SADIE J. RYAN Article first published online: 19 DEC 2016 Herpetological Review SUMMARY: As the US Northeast experienced reforestation over the past decades, recovering […]
The world’s population will reach 8 billion by 2023. One third of the world is TB positive; 300-500 million have malaria; more than 30 million live with HIV/AIDS. Multi-drug resistance in urban settings, climate change, and disease-related mortality are going to impact your near future.
BOERSCH-SUPAN, RYAN – deBInfer: Bayesian inference for dynamical models of biological systems in R Philipp H. Boersch-Supan, Sadie J. Ryan, Leah R. Johnson Article first published online: 15 OCT 2016 Methods in Ecology and Evolution DOI: 10.1111/2041-210X.12679 ABSTRACT: 1.Understanding the mechanisms underlying biological systems, and ultimately, predicting their behaviours in a changing environment requires overcoming the […]
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This summer, Geography’s Ryan Lab and the Emerging Pathogens Institute were proud to host Lauren Fregosi as a summer research intern working on Dr. Sadie Ryan‘s National Science Foundation’s Ecology and Evolution of Infectious Diseases (NSF EEID) grant. The internship, which was offered through the NSF Research Experience for Undergraduates (REU) program, was focused on modelling approaches […]
RYAN – Reference and Baseline Hematocrit Measures for the Threatened New England Cottontail (Sylvilagus transitionalis) and Comparison with Sympatric Eastern Cottontail (Sylvilagus floridanus) Rabbits S. J. Ryan , E. J. Gavard , A. E. Cheeseman , J. B. Cohen , C. M. Whipps Article first published online: 13 JUL 2016 Journal of Zoo and Wildlife Medicine […]
GAINESVILLE, Florida – A new collection of research articles, jointly edited by Dr. Sadie Ryan and published by PLoS ONE examines the health and well being of captive elephant populations in North American zoos and preserves. This collection is sensitive in nature. While keeping large, socially complex, and long-lived animals, such as elephants, in captivity […]
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RYAN – Knowledge, attitudes, and practices regarding dengue infection among public sector healthcare providers in Machala, Ecuador Andrew S. Handel, Efraín Beltrán Ayala, Mercy J. Borbor-Cordova, Abigail G. Fessler, Julia L. Finkelstein, Roberto Xavier Robalino Espinoza, Sadie J. Ryan and Anna M. Stewart-Ibarra Article first published online: 01 JUN 2016 Tropical Diseases, Travel Medicine and Vaccines DOI: […]
GAINESVILLE, Florida — Dr. Sadie Ryan (Assistant Professor of Medical Geography in the Department of Geography and UF’s Emerging Pathogen Institute) and colleagues, have just received a National Science Foundation (NSF) Division of Environmental Biology’s Ecology and Evolution of Infectious Diseases (EEID) Program rapid response, or RAPID grant to study the socio-ecology and climate responses of Zika virus transmission […]
GAINESVILLE, Florida – When large carnivores are removed from an African landscape, local farmers need to adopt complex crop management strategies and be more vigilant about crop-raiding baboons, a new modeling study out of the University of Florida finds. In a healthy protected forest ecosystem, apex predators like lions, cheetahs, and hyenas, keep the local […]
Read more "African farmers contend with baboons when the big cats are gone"
Two Geography undergraduate students were recognized with the Champions for Change Award at the Earth Day celebration this week. Ms. Paula Roetscher (double major in Geography and Sustainability Studies and a minor in Arabic Language and Literature) and Mr. Tyler James (major in Psychology, minor in Geography) both received the award for their research and advocacy work. The Champions […]
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RYAN – Perceptions of risk in communities near parks in an African biodiversity hotspot Joel Hartter, Nicholas Dowhaniuk, Catrina A. MacKenzie, Sadie J. Ryan, Jeremy E. Diem, Michael W. Palace, Colin A. Chapman Article first published online: 28 MAR 2016 Ambio DOI: 10.1007/s13280-016-0775-8 ABSTRACT: Understanding conservation and livelihood threats in park landscapes is important to informing conservation […]
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The University of Florida is looking for a new faculty member in the area of ‘Health and Social Change in Africa’. This preeminence position is for exceptional candidates at the Assistant level, or Associate or Full Professors. This position would be in the College of Liberal Arts and Sciences (CLAS) which is home to many departments, […]
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GAINESVILLE, Fla. – A larger portion of Africa is currently at high risk for malaria transmission than previously predicted, according to a new University of Florida mapping study. Under future climate regimes, the area where the disease can be transmitted most easily will shrink, but the total transmission zone will expand and move into new […]
Read more "With climate change, malaria risk in Africa shifts, grows"
RYAN – Mapping Physiological Suitability Limits for Malaria in Africa Under Climate Change Ryan Sadie J., McNally Amy, Johnson Leah R., Mordecai Erin A., Ben-Horin Tal, Paaijmans Krijn, and Lafferty Kevin Article first published online: 18 Nov 2015 Vector-Borne and Zoonotic Diseases DOI: 10.1089/vbz.2015.1822 ABSTRACT: We mapped current and future temperature suitability for malaria transmission in Africa […]
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Geography’s Dr. Sadie Ryan‘s NSF funded research in Ecuador was recently profiled for part of UF’s GatorGood initiative. Dr. Ryan’s work is focused on the impact of climate gradients on malaria, dengue fever, and cholera in Ecuador. Find out more about the far-reaching effects if Dr. Ryan’s work and learn how you can help contribute to the […]
Read more "How does a mosquito in Ecuador affect people around the world?"
Tyler James is an undergraduate UF Scholar in Geography with Dr Sadie J. Ryan. On October 26th, he presented a poster on the the first of his projects at the UF Fall Undergraduate Research Symposium: James, T., and Ryan, S.J. STI knowledge in college students: Identifying targets for safer sex education. Extract of Introduction: In […]
During this course, the world’s population will reach 7.4 billion. One third will be TB positive; 300-500 million will have malaria; more than 35 million will live with HIV/AIDS. Multi-drug resistance in urban settings, climate change, and disease-related mortality are going to impact your near future.
GAINESVILLE, Florida –A new study out of the University of Florida calls for caution in estimating the impact of mosquito control on malaria and other vector-borne disease transmission. Public health officials make prevention and treatment decisions based on models of the impact of interventions. For vector-borne diseases like malaria, these models are based on mosquito […]
SOUTHWORTH, BUNTING, RYAN, HERRERO, WAYLEN – Changes in vegetation persistence across global savanna landscapes, 1982–2010 J. Southworth, L. Zhu, E. Bunting, S.J. Ryan, H. Herrero, P.R. Waylen & M.J. Hill Article first published online: 14 Aug 2015 Journal of Land Use Science DOI: 10.1080/1747423X.2015.1071439 ABSTRACT: We present a global analysis of the changing face of […]
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RYAN, SOUTHWORTH, HARTTER – The process of landscape fragmentation outside park borders occurs through the actions of people living near the boundaries. In the Kibale National Park landscape in Uganda Authors: Dr. Sadie Ryan, Dr. Jane Southworth, Dr. Joel Hartter, Nicholas Dowhaniuk, Rebecca Fuda and Dr. Jeremy Diem. Publication information: Applied Geography 2015, Vol. 58 pp. […]
Read more "Household level influences on fragmentation in an African park landscape"
