UC Davis Seroepidemiology Research Group

Accurate methods to measure infectious disease burden are essential for guiding public health decisions, yet many infectious diseases remain under-recognized due to limited diagnostics and costly, resource-intensive surveillance systems. Our work addresses this gap by developing seroepidemiologic methods to characterize infection burden in populations. Currently, we focus on enteric fever (Salmonella Typhi and Paratyphi), Scrub Typhus (Orientia tsutsugamushi), Melioidosis (Burkholderia pseudomallei), Shigella (Shigella spp.), and Cholera (Vibrio cholerae).

Our research group is based at the University of California, Davis, and is led by Drs. Kristen Aiemjoy and Ezra Morrison. We are supported by US National Institutes of Health, the Bill and Melinda Gates Foundation and the Department of Defense. We collaborate with partners around the world, including in South Asia, Southeast Asia, Sub-Saharan Africa, and Latin America.

We are always looking for new collaborators and students. If you are interested in working with us, please check out our opportunities page or reach out to us at ucdserg@ucdavis.edu.

CSID 2025
Krista and Sam contribution to the Open Software Tools for Climate Sensitivite Infectious Diseases (CSID) held in Kanchnaburi, Thailand, 2025
aprc4
Krista presenting at the Asia Pacific Rickettsia Conference (APRC4) - Penang Malaysia, 2025
Blood donation
Kristen donating blood after a blood collection event for the SURFACE (Surveillance for Fever in Amnat Charoen) study in Thailand
astmh
Kristina Presenting at ASTMH - Toronto, Canada, 2025
sam dbs
Sam Collecting Dried Blood Spots for the SURFACE (Surveillance for Fever in Amnat Charoen) study in Thailand
ntdss
Krista and Kristen hoping to put scrub typhus on the WHO's list of recognized Neglected Tropical Diseases
Serocalculator workshop participants from 19 countries in Kigali, Rwanda, 2023
2023 workshop on 'Serocalculator' adjacent to the Coalition Against Typhoid Meeting in Kigali, Rwanda. Participants were from 19 countries