Principal Investigator

Chris Barker – (

Chris Barker, Ph.D.,  is an associate professor in the Department of Pathology, Microbiology, and Immunology of the UC Davis School of Veterinary Medicine. He studies the epidemiology and ecology of mosquito-transmitted viruses, and he directs California’s central diagnostic laboratory and related data management systems for surveillance of mosquito-borne viruses. Chris has MS degrees in epidemiology and entomology and a PhD in medical entomology.  @TheBarkerLab

Postdoctoral Scholars

Matteo Marcantonio – (

Matteo Marcantonio, Ph.D., has a background in natural and environmental science. His interests include the study of species ecology, invasion and conservation biology.  Currently his work integrates experimental and observational data from lab, semi-controlled environments as well as remote sensing and data logger, with modelling applied to the invasion dynamics of Aedes mosquitoes in urban areas. In his research, he is committed to studying the spread of invasive species as a multi-scale ecological process, by exploring how micro-habitat and micro-geographic conditions can affect its outcome at larger spatial scales. The rationale behind his research is to provide information that helps the mitigation of invasive Aedes populations, “know the enemy and you will win”!

Brad Main – (

Brad Main, Ph.D., has a background in arthropod genomics and transcriptomics. He is passionate about understanding adaptation and speciation and the genetic basis of insecticide resistance, host preference, and vector competence in mosquitoes. Brad is exploring whether and why distinct genetic populations of Aedes aegypti vary in their ability to become infected by and transmit Zika virus.

Graduate Students 

Marisa Donnelly – (

Marisa Donnelly is an Epidemiology PhD Candidate at UC Davis and studies the disease ecology of Zika and dengue, including climatic and social drivers of Aedes aegypti abundance. Marisa obtained her B.S. from UCSD where she studied risk factors for HIV in sex workers in Mexico. Marisa’s interests include social determinants of health, spatial analysis, traveling, and rock climbing. @MAPDonnelly

Olivia Winokur – (

Olivia Winokur is an NSF GRFP fellow and Entomology PhD student at UC Davis where she studies how ecological factors affect mosquito-borne virus transmission. Olivia obtained her B.S. from Cornell University where she studied dog heartworm transmission and mosquito flight tone variation. Olivia enjoys traveling, backpacking, playing pub trivia, and is passionate about promoting diversity in STEM and the outdoors through GOALS. @oliviawinokur

Pascale Stiles  –  (

Pascale Stiles, M.Sc., is a PhD student in the Graduate Group of Epidemiology at UC Davis, where she works on ways to improve the prediction of human West Nile virus disease occurrence in California using entomological observational data. She obtained her MSc from the London School of Hygiene and Tropical Medicine, where she studied malaria and sociodemographic factors. Her interests are vector-borne diseases, disease surveillance, and spatiotemporal patterns of disease.

Karen Holcomb – (

Karen Holcomb is a PhD student in the Epidemiology Graduate Group at UC Davis. Her research entails modeling the effects of vector control on spatial-temporal trends and epidemic potential of vector-borne diseases, particularly West Nile virus. She is interested in quantifying how viral dynamics change as a result of external events. Other interests of hers include quantitative epidemiology, infectious and zoonotic diseases, risk prediction, and backpacking.

Anne Kimmerlein – (

Anne Kimmerlein, D.V.M., is a Masters of Preventive Veterinary Medicine (MPVM) candidate. She is interested in the prevention and control of infectious disease at the intersection of human health, animal health, and environmental health. Her current research examines the relationship between drought and West Nile virus disease in California.

Undergraduate Students

Sarah Karels (

Sarah Karels is a third year undergraduate majoring in Biological Sciences and minoring in Medical-Veterinary Entomology who came to the lab through the Research Scholars Program in Insect Biology (RSPIB). As a pre-med student, her interests lie in the intersection of insects and disease. When not raising the lab’s mosquitoes, she can be found helping prep experiments or testing mosquito samples from across the state for various arboviruses.

Andrew Provencio

Caitlyn Gonzalez


Ying Fang (

Ying Fang manages the DART Surveillance Testing Laboratory, where mosquito and bird specimens are tested for viral infection using molecular and traditional biological methods to support surveillance and research on mosquito-borne encephalitis viruses.  Ying also evaluates new laboratory methodology, ensures quality control of work within the DART BSL-3 and other laboratories, curates the DART virus reference collection, and supervises and trains personnel.

Sandra Garcia

Jody Simpson

Mathew Leland –

Mathew Leland is a software engineer for the Barker lab.  He utilizes the huge amount of data stored at the Calsurv platform, and tries to create informative and fun to use visualizations.





Sunny An