Winokur, a UC Davis doctoral candidate and vector-borne disease specialist who studies with major professor Chris Barker, will present her exit seminar, hosted by the UC Davis Department of Entomology and Nematology, at 4:10 p.m., Wednesday, Oct. 5 in 122 Briggs Hall.
She'll discuss "Temperature Drives Transmission of Mosquito-borne Pathogens: Improving Entomological Estimates for Aedes aegypti-borne Virus Transmission Risk." Her seminar will be both in-person and virtual. The Zoom link: https://ucdavis.zoom.us/j/95882849672.
"The mosquito Aedes aegypti is the primary vector of a range of viruses that cause a major burden on human health worldwide, including dengue, Zika, chikungunya, and yellow fever viruses," Winokur writes in her abstract. "As the Zika epidemic emerged in 2016, estimates for Zika risk were based on proxy evidence from closely related dengue virus. To improve risk estimates, we studied how temperature affects Zika virus extrinsic incubation period. We sought to further improve risk estimates by studying thermal preferences of Ae. aegypti mosquitoes in the laboratory and in the field. Current mosquito-borne pathogen risk models primarily use temperatures from weather stations or thermal imagery as a proxy for the temperatures mosquitoes experience, however such approaches do not account for local environments or microclimates available to adult mosquitoes. Taken together, the results of these studies can be used to improve prediction of mosquito-borne pathogen risk and inform mosquito control decisions." (See information on the mosquito on the California Department of Public Health website)
Olivia received her bachelor's degree in May of 2015 from Cornell University where she was an interdisciplinary studies major (environmental effects on human health).
At UC Davis, Winokur served as the 2019-2020 president of the Entomology Graduate Student Association and as a 2020-2022 committee member of the UC Davis Entomology Diversity, Equity, Inclusion, & Belonging. She co-founded the Girls' Outdoor Adventure in Leadership and Science (GOALS) in 2017 and continues to serve in leadership roles. GOALS is a free two-week summer science program for high school girls and gender expansive youth from backgrounds underrepresented in STEM fields. They learn science, outdoors skills, and leadership hands-on while backpacking in Sequoia National Park.
Active in the vector-borne disease community, Winokur completed a 2019-2020 term as the Executive Council student representative for the American Committee on Medical Entomology (ACME) and as a 2017-2019 volunteer with the Vector-Borne Disease Section of the California Department of Public Health, where she assisted with hantavirus and plague surveillance. She peer-reviews manuscripts for the Journal of Medical Entomology.
Winokur is the recipient of numerous fellowships and grants, including a $140,00 National Science Foundation Graduate Research Fellowship; a $30,000 Pacific Southwest Center of Excellence in Vector-Borne Diseases Graduate Fellowship; a $25,000 Pacific Southwest Center of Excellence in Vector-Borne Diseases Postdoctoral Fellowship; a Professors for the Future Fellowship (UC Davis) of $3,000; and two-consecutive Hazeltine Student Research Awards (UC Davis), totaling $5,500. She also received an American Geophysical Union Centennial Grant of $9,720 and an American Association for University Women Community Action Grant of $5,000 (outreach grants).
Winokur's latest peer-reviewed publications include co-authoring "The Influence of Vector-borne Disease on Human History: Socio-Ecological Mechanisms" in the journal Ecology Letters; and serving as the lead author of "Impact of Temperature on the Extrinsic Incubation Period of Zika Virus in Aedes aegypti in the journal PLOS (Public Library of Science): Neglected Tropical Diseases.
Emily Meineke, assistant professor of urban landscape entomology, UC Davis Department of Entomology and Nematology, coordinates the department's seminars for the 2022-23 academic year. All 11 seminars will take place both person and virtually at 4:10 p.m. on Wednesdays in Room 122 of Briggs Hall except for the Nov. 9th and Dec. 7th seminars, which will be virtual only, she said. (See list of seminars)
For further information on the seminars or technical difficulties with Zoom, contact Meineke at email@example.com.
Meet Olivia Winokur, an enthusiastic, dedicated and multi-talented medical entomologist whose childhood curiosity about a yellow fever vaccination sparked her interest in 'skeeters.
In her youth, Olivia traveled with her parents and brothers to “off-the-beaten-path” locations. “So I was exposed to vector-borne disease awareness from a young age,” she recalled. “When I was 8 years old, I remember getting the yellow fever vaccination and being curious about why I had to get it for a trip to Southern Africa. I think that was my defining moment when I learned mosquitoes are more than just annoying. Since then, I've slept under many mosquito nets and am no stranger to mosquito bites.”
“I didn't think much about making a career out of those 'skeeters, though. I attended Cornell University as undergraduate, where I studied global public health from multiple perspectives. It wasn't until I became a research assistant in Dr. Laura Harrington's lab that I became fascinated with mosquito biology and decided to pursue a career in medical entomology.”
Winokur, who received her bachelor's degree in 2015 from Cornell University, majoring in Interdisciplinary Studies and focusing on the environmental effects on human health, enrolled in the UC Davis graduate program in 2016 as a Ph.D entomology student with a designated emphasis in the biology of vector-borne diseases.
She studies with major professor and UC Davis alumnus Christopher Barker, associate professor and associate researcher in the Department of Pathology, Microbiology and Immunology, School of Veterinary Medicine, who doubles as a graduate student advisor in the UC Davis Department of Entomology and Nematology.
Earlier this year, Winokur received a three-year National Science Foundation Graduate Research Fellowship. A 2017 Bill Hazeltine Memorial Award also helps fund her research.
Her research at UC Davis mainly involves Aedes aegypti, also known as the yellow fever mosquito. “At present, most of the research done on mosquito-borne virus transmission is done under a very narrow range of conditions that reflect a particular mosquito species' 'optimal' rearing and adult environment,” Winokur said. “I'm interested in how conditions outside of this optimal range at both the larval and adult stages affect mosquito-borne virus transmission. I work mostly with Aedes aegypti, which transmits diseases including dengue, Zika, yellow fever, and chikungunya viruses. Currently my research is focused on Zika virus. I hope to determine how the range of conditions mosquitoes encounter outside of the lab alter their life history traits, such as survival and blood feeding behavior, as well as viral transmission so that we can better understand geographical and seasonal mosquito-borne virus risk and eventually mitigate the risk.”
What fascinates her about mosquitoes? “People are usually wowed when I tell them there are over 3500 species of mosquitoes!” she said. “But don't worry.. not all of them transmit human pathogens. I love telling people about the natural history of different genera and species and how this affects the likelihood of pathogen transmission to humans. I'm continually fascinated by how resilient mosquitoes are, how successful they've been throughout history, and how they've completely altered human history. I actually gave a lecture on how vector-borne diseases have altered human history last quarter (Winter 2018) to an undergraduate class led by UC Davis entomology graduate students (Ent10: Natural History of Insects).”
Born in Long Beach, Calif., Olivia grew up in Laguna Niguel, Calif., where she focused on science as a part of the Dana Hills High School Health and Medical Occupations Academy. Olivia also played basketball at Dana Hills and helped the team win its first league title.
What drew her to UC Davis? “I grew up in California so I was familiar with UC Davis from a young age. I actually applied to UC Davis as an undergraduate, but decided to try life on the East Coast instead and attended Cornell University. While at Cornell, I learned a lot about UC Davis as most of my professors had spent some time at UC Davis during their academic tenure, and a lot of the research I was reading was coming out of UC Davis. I was excited to come back to the West Coast for graduate school so UC Davis seemed like an obvious choice!”
Winokur is a co-author of “The Impact of Temperature and Body-Size on Flight Tone Variation in the Mosquito Vector Aedes aegypti (Diptera: Culicidae): Implications for Acoustic Lures," published in April 2017, in the Journal of Medical Entomology. Several other manuscripts are accepted or in preparation.
She has given presentations at the Mosquito and Vector Control Association of California and the American Society of Tropical Medicine and Hygiene.
Dedicated to helping high school girls transition into STEM (Science, Technology, Engineering and Math) careers, Winokur is a founding board member and publicity co-chair of GOALS (Girls' Outdoor Adventure in Leadership and Science). The organization seeks “to cultivate and embolden the next generation of STEM leaders through a free, immersive, field-based summer science program for high school girls.”
“GOALS is for high school girls, inclusive of cis, trans, and gender nonbinary youth who identify with girlhood, to learn science hands-on while backpacking through the wilderness,” Winokur related. “I have worked with an incredible team of UC Davis affiliates to create GOALS to increase opportunities for high school students who identify with girlhood from backgrounds traditionally underrepresented in STEM. Our first trip is happening this summer!” This year's program takes place July 21 to Aug. 5.
Winokur is also a part of the Letters to a Pre-Scientist program “so I get to be a pen-pal to an elementary school student to talk about science!” In addition, she serves as the treasurer of the UC Davis Entomology Graduate Student Association.
Delighted to return to California after being on the East Coast, Winokur spends her leisure time outdoors hiking and backpacking “and exploring the beautiful places near Davis like the Lake Tahoe area and Yosemite. I taught backpacking and wilderness survival skills for Cornell Outdoor Education during college. Additionally, I'm a trivia nerd so I watch a lot of Jeopardy! and play pub trivia with my entomology colleagues weekly. I also enjoy drawing, reading, playing board games, and doing jigsaw puzzles. When I get the chance I enjoy traveling as well--I just returned from Belize and I'll be in Denmark in July!”
After finishing her Ph.D., Winokur plans to remain in academia, but “I'm unsure exactly what that will look like! I really enjoy research, teaching, and mentoring so I'd like to have a career where I can do all of these. I also plan to have a career where I can conduct translational research with broad global health implications, engage non-scientists, create tools to help decision makers mitigate vector-borne disease burden worldwide, and encourage interest and diversity in STEM.”
It shouldn't be, nor is it, at the University of California, Davis.
Medical entomologists and other scientists at UC Davis are planning a Malaria Awareness Day from 10 a.m. to 1:30 p.m. on Monday, April 25 in the Memorial Union.
The event will take place in MU II (second floor) and is free and open to the public.
Statistics from the Center for Disease Control and Prevention (CDC) tell the alarming story.
"It is a leading cause of death and disease in many developing countries, where young children and pregnant women are the groups most affected," the CDC points out, citing these figures from the World Health Organization's World Malaria Report 2013 and the Global Malaria Action Plan:
- 3.4 billion people (half the world's population) live in areas at risk of malaria transmission in 106 countries and territories
- In 2012, malaria caused an estimated 207 million clinical episodes, and 627,000 deaths. An estimated 91% of deaths in 2010 were in the African Region.
The most vulnerable groups, CDC says, are young children, who have not yet developed partial immunity to malaria; pregnant woman, whose immunity is decreased by pregnancy, especially during the first and second pregnancies; and travelers or migrants coming from areas with little or no malaria transmission, who lack immunity.
Africa, according to CDC, is the most affected due to a combination of factors:
- A very efficient mosquito (Anopheles gambiae complex) is responsible for high transmission.
- The predominant parasite species is Plasmodium falciparum, which is the species that is most likely to cause severe malaria and death.
- Local weather conditions often allow transmission to occur year round.
- Scarce resources and socio-economic instability have hindered efficient malaria control activities.
The schedule for the UC Davis Malaria Awareness Day:
10 to 10:30 am.: Coffee/social/posters
10:30 to 10:50: "General Malaria Biology" by medical entomologist Gregory Lanzaro, professor, Department of Pathology, Microbiology and Immunology, UC Davis School of Veterinary Medicine.
10:50 to 11:20: Conducting Field Research in Rural Africa" by medical entomologist Anthony Cornel, associate professor, UC Davis Department of Entomology and Nematology and based at the UC Kearney Agriculture and Research Center, Parlier
11:10 to 11:30: "Marlaria Parasites in the Mosquito" by molecular biologist Shirley Luckhart, professor, UC Davis Department of Medical Microbiology and Immunology and an adjunct professor in the Department of Entomology and Nematology
11:30 to 11:50: "Mosquito-Borne Viral Diseases" by medical entomologist Chris Barker, assistant adjunct professor and assistant research scientist, UC Davis Department of Pathology, Microbiology and Immunology
11:50 to 12:10: "Disease Transmission by Non-Mosquito Vectors" by epidemiologist/veterinarian and disease ecologist Janet Foley, professor, UC Davis Department of Medicine and Epidemiology
12:10 to 1:30: A free lunch will be provided, but reservations must be made by April 21 to firstname.lastname@example.org.
So, you want to become an entomologist...
Entomologists, future entomologists and others interested in science are looking forward to the fall seminars sponsored Oct. 1 through Dec. 3 by the Department of Entomology, University of California, Davis.
All seminars are held on Wednesdays from 12:10 to 1 p.m. in 122 Briggs Hall. Individual faculty members will host the seminars.
You'll learn about fungus-farming ambrosia beetles, the invasive brown marmorated sting bug, argentine ants, thrips, and Culex mosquitoes, to name a few.
The UC Davis entomology faculty do a fantastic job lining up speakers. The key word here is "passion." (The best advice I ever received in a fortune cookie involved passion: "Nothing great in the world has ever been accomplished without passion.")
Bring on the bugs!
Oct. 1: Jiri Hulcr of Department of Entomology, Michigan State University, East Lansing, “Evolution and Ecology of Fungus-Farming Ambrosia Beetles. Host: entomology professor Phil Ward
Oct. 8: Anne Nielsen, Department of Nematology, UC Davis, “Population Ecology and Damage Estimates of the Invasive Brown Marmorated Stink Bug, Halyomorpha halys.” Host: nematology and entomology professor Ed Lewis
Oct. 15: Urs Wyss, Institute of Phytopathology, Kiel University, Kiel, Germany, “Biological Control of Greenhouse Pests with Natural Arthropod Enemies.” Host: entomology and nematology professor Harry Kaya
Oct. 22: Greg Crutsinger, Department of Ecology and Evolutionary Biology, University of Tennessee, “Linking Plant Genetic Variation to Foliage- and Litter-Based Arthropod Communities.” Host: entomology professor Rick Karban
Oct. 29: Kris Godfrey, California Department of Food and Agriculture, Sacramento "Pest Management of Invasive Insect Pests in California.” Host: nematology and entomology professor Ed Lewis
Nov. 5: Neil Tsutsui, Department of Environmental Science, Policy and Management, UC Berkeley, “Exploring the Genetic and Chemical Basis of Argentine Ant Behavior.” Host: entomology professor Phil Ward
Nov. 12: Le Kang, Institute of Zoology, Chinese Academy of Sciences, Beijing, China Chemical Communications Between Plants, Leafminers and Parasites.” Host: Michael Parrella, associate dean of the Division of Agricultural Sciences, College of Agricultural and Environmental Sciences, and entomology professor
Nov. 26: Chris Barker, Department of Entomology, UC Davis, “Environmental Drivers of Large-Scale Spatial and Temporal Patterns in Mosquito Abundance and Virus Transmission in California.” Host: Bruce Eldridge, emeritus professor of entomology
Dec. 3: Lisa Chanbusarakum, Department of Entomology, UC Davis, “Exploring the Microbial World of Frankliniella occidentalis, the Western Flower Thrips.” Host: Diane Ullman, associate dean for undergraduate academic programs at the College of Agricultural and Environmental Sciences and entomology professor