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Caitlin Hemlock, PhD, MS

Languages spoken: English, French, Spanish

Caitlin Hemlock is an epidemiologist and Assistant Professor in the Division of Public Health, Department of Family Medicine and Public Health at the University of Utah. She studies how water, sanitation, and domestic animals influence enteric infection and antimicrobial resistance in young children in low-resource settings. Her work uses a One Health approach to identify where children are exposed to fecal pathogens from humans and animals and how those exposures affect early growth and development. She uses community-engaged fieldwork in combination with environmental microbiology and infectious disease epidemiology to study these relationships and develop interventions that mitigate high-risk exposures.

Her ongoing research includes studies in Ecuador, Nepal, and Mozambique on enteric infection dynamics in early childhood and how they affect subsequent growth and development, how contact with and management of domestic animals and their feces in the household shape pathogen and AMR transmission across people and the environment, and how improvements to water, sanitation, and hygiene (WASH) infrastructure affect these exposures and child health outcomes.

Prior to Utah, she was a postdoctoral fellow at the University of Washington in the Department of Environmental and Occupational Health Sciences and earned her PhD in Epidemiology from the University of California, Berkeley.

Education History

Fellowship University of Washington, Karen Levy Lab
 Postdoctoral Fellow
Doctoral Training University of California, Berkeley
 PhD
Graduate Training George Washington University
 MS
Undergraduate Cornell University
 BS

Selected Publications

Journal Article

  1. Cotto I, Albn V, Durn-Viseras A, Jesser KJ, Zhou NA, Hemlock C, Ballard AM, Fagnant-Sperati CS, Lee GO, Hatt JK, Royer CJ, Eisenberg JNS, Trueba G, Konstantinidis KT, Levy K, Fuhrmeister ER, ECoMiD Authorship Group (2025). Environmental exposures associated with the gut microbiome and resistome of pregnant women and children in Northwest Ecuador. Nat Commun, 17(1), 15.
  2. Hemlock C, Lee GO, Arnold BF, Contreras JD, Miller-Petrie MK, Trueba G, Anchundia A, Castro N, Ballard AM, Eisenberg JNS, Levy K, ECoMiD Authorship Group Principal InvestigatorsCo-Investigators, Field data collection subgroup, Data management subgroup, Nutrition Subgroup (2025). Prenatal and postnatal environmental influences on child growth trajectories across a rural-urban gradient: an analysis of the ECoMiD longitudinal birth cohort.
  3. Chen B, Mertens AN, Lin CH, Tan ST, Jamshed F, Figueroa D, Hemlock C, Butzin-Dozier Z, Fernald LC, Stewart CP, Hubbard AE, Rahman MZ, Ali S, Arnold BF, Dhabhar FS, Granger DA, Rahman M, Luby SP, Colford JM Jr, Lin A (2025). Associations Between Micronutrient Status, Hormones, and Immune Status During Pregnancy and Child Growth in Rural Bangladesh: A Prospective Cohort Study. Curr Dev Nutr, 9(12), 107596.
  4. Ho GG, Achando BS, Ali S, Hemlock C, Pitchik HO, Stewart CP, Tofail F, Rahman MZ, Alauddin M, Rao G, Dentz HN, Buleti JP, Nekesa C, Arnold CD, Famida SL, Hossen MS, Mutsuddi P, Akther S, Grembi JA, Tan ST, Alauddin ST, Meerkerk T, Wolfe MK, Cheruiyot P, Njenga SM, Shoab AK, Rahman M, Unicomb L, Arnold BF, Kariger P, Hubbard AE, Colford JM Jr, Pickering AJ, Null C, Luby SP, Fernald LC, Mertens AN, Lin A (2025). Biomarkers of environmental enteric dysfunction and neurodevelopmental outcomes among children in rural Bangladesh and Kenya: a prospective cohort study. Am J Clin Nutr, 122(2), 474-487.
  5. Hemlock C, Kwong LH, Fernald LCH, Hubbard AE, Colford JM, Tofail F, Rahman MM, Parvez S, Luby SP, Mertens AN (2025). Using machine learning to identify subgroups with the highest expected benefit in a population-based water, sanitation, handwashing, and nutrition intervention.
  6. Jesser KJ, Zhou NA, Hemlock C, Miller-Petrie MK, Contreras JD, Ballard A, Sosa-Moreno A, Calvopia M, Arnold BF, Cevallos W, Trueba G, Lee GO, Eisenberg JNS, Levy K (2024). Environmental Exposures Associated with Enteropathogen Infection in Six-Month-Old Children Enrolled in the ECoMiD Cohort along a Rural-Urban Gradient in Northern Ecuador†. Environ Sci Technol, 59(1), 103-118.
  7. Ercumen A, Mertens AN, Butzin-Dozier Z, Jung DK, Ali S, Achando BS, Rao G, Hemlock C, Pickering AJ, Stewart CP, Tan ST, Grembi JA, Benjamin-Chung J, Wolfe M, Ho GG, Rahman MZ, Arnold CD, Dentz HN, Njenga SM, Meerkerk T, Chen B, Nadimpalli M, Islam MA, Hubbard AE, Null C, Unicomb L, Rahman M, Colford JM Jr, Luby SP, Arnold BF, Lin A (2025). Water, sanitation, handwashing, and nutritional interventions can reduce child antibiotic use: evidence from Bangladesh and Kenya. Nat Commun, 16(1), 556.
  8. Hemlock C, Galasso E, Weber AM, Randriamiarisoa TC, Col M, Dieci M, Ratsifandrihamanana L, Fernald LCH (2024). Integrating early child development into an existing health and nutrition program: evidence from a cluster-randomized controlled trial. BMC Public Health, 24(1), 2583.
  9. Jung DK, Tan ST, Hemlock C, Mertens AN, Stewart CP, Rahman MZ, Ali S, Raqib R, Grembi JA, Karim MR, Shahriar S, Roy AK, Abdelrahman S, Shoab AK, Famida SL, Hossen MS, Mutsuddi P, Akther S, Rahman M, Unicomb L, Hester L, Granger DA, Erhardt J, Naved RT, Al Mamun MM, Parvin K, Colford JM Jr, Fernald LCH, Luby SP, Dhabhar FS, Lin A (2023). Micronutrient status during pregnancy is associated with child immune status in rural Bangladesh. Curr Dev Nutr, 7(8), 101969.
  10. Garrett DO, Longley AT, Aiemjoy K, Yousafzai MT, Hemlock C, Yu AT, Vaidya K, Tamrakar D, Saha S, Bogoch II, Date K, Saha S, Islam MS, Sayeed KMI, Bern C, Shakoor S, Dehraj IF, Mehmood J, Sajib MSI, Islam M, Thobani RS, Hotwani A, Rahman N, Irfan S, Naga SR, Memon AM, Pradhan S, Iqbal K, Shrestha R, Rahman H, Hasan MM, Qazi SH, Kazi AM, Saddal NS, Jamal R, Hunzai MJ, Hossain T, Marks F, Carter AS, Seidman JC, Qamar FN, Saha SK, Andrews JR, Luby SP (2021). Incidence of typhoid and paratyphoid fever in Bangladesh, Nepal, and Pakistan: results of the Surveillance for Enteric Fever in Asia Project. Lancet Glob Health, 10(7), e978-e988.
  11. Styczynski A, Hemlock C, Hoque KI, Verma R, LeBoa C, Bhuiyan MOF, Nag A, Harun MGD, Amin MB, Andrews JR (2022). Assessing impact of ventilation on airborne transmission of SARS-CoV-2: a cross-sectional analysis of naturally ventilated healthcare settings in Bangladesh. BMJ Open, 12(4), e055206.
  12. Galasso E, Ratsifandrihamanana L, Weber AM, Hemlock C, Col M, Dieci M, Rakotomalala N, Rambeloson V, Fernald LCH (2022). Integrating early stimulation and play at scale: study protocol for "MAHAY Mikolo", a multi-arm cluster-randomized controlled trial. BMC Public Health, 22(1), 265.
  13. Amato HK, Hemlock C, Andrejko KL, Smith AR, Hejazi NS, Hubbard AE, Verma SC, Adhikari RK, Pokhrel D, Smith K, Graham JP, Pokhrel A (2022). Biodigester Cookstove Interventions and Child Diarrhea in Semirural Nepal: A Causal Analysis of Daily Observations. Environ Health Perspect, 130(1), 17002.
  14. Longley AT, Hemlock C, Date K, Luby SP, Andrews JR, Saha SK, Bogoch II, Yousafzai MT, Garrett DO, Qamar FN (2020). Illness Severity and Outcomes Among Enteric Fever Cases From Bangladesh, Nepal, and Pakistan: Data From the Surveillance for Enteric Fever in Asia Project, 2016-2019. Clin Infect Dis, 71(Suppl 3), S222-S231.
  15. Tamrakar D, Vaidya K, Yu AT, Aiemjoy K, Naga SR, Cao Y, Bern C, Shrestha R, Karmacharya BM, Pradhan S, Qamar FN, Saha S, Date K, Longley AT, Hemlock C, Luby S, Garrett DO, Bogoch II, Andrews JR (2020). Spatial Heterogeneity of Enteric Fever in 2 Diverse Communities in Nepal. Clin Infect Dis, 71(Suppl 3), S205-S213.
  16. Yu AT, Shakya R, Adhikari B, Tamrakar D, Vaidya K, Maples S, Date K, Bogoch II, Bern C, Qamar F, Yousafzai MT, Garrett DO, Longley AT, Hemlock C, Luby S, Aiemjoy K, Andrews JR (2020). A Cluster-based, Spatial-sampling Method for Assessing Household Healthcare Utilization Patterns in Resource-limited Settings. Clin Infect Dis, 71(Suppl 3), S239-S247.
  17. Qamar FN, Yousafzai MT, Dehraj IF, Shakoor S, Irfan S, Hotwani A, Hunzai MJ, Thobani RS, Rahman N, Mehmood J, Hemlock C, Memon AM, Andrews JR, Luby SP, Garrett DO, Longley AT, Date K, Saha SK (2020). Antimicrobial Resistance in Typhoidal Salmonella: Surveillance for Enteric Fever in Asia Project, 2016-2019. Clin Infect Dis, 71(Suppl 3), S276-S284.
  18. Vaidya K, Aiemjoy K, Qamar FN, Saha SK, Tamrakar D, Naga SR, Saha S, Hemlock C, Longley AT, Date K, Bogoch II, Garrett DO, Luby SP, Andrews JR (2020). Antibiotic Use Prior to Hospital Presentation Among Individuals With Suspected Enteric Fever in Nepal, Bangladesh, and Pakistan. Clin Infect Dis, 71(Suppl 3), S285-S292.
  19. Aiemjoy K, Tamrakar D, Saha S, Naga SR, Yu AT, Longley A, Date K, Hemlock C, Qamar FN, Saha SK, Luby SP, Garrett DO, Andrews JR, Bogoch II (2020). Diagnostic Value of Clinical Features to Distinguish Enteric Fever From Other Febrile Illnesses in Bangladesh, Nepal, and Pakistan. Clin Infect Dis, 71(Suppl 3), S257-S265.
  20. Andrews JR, Vaidya K, Saha S, Yousafzai MT, Hemlock C, Longley A, Aiemjoy K, Yu AT, Bogoch II, Tamrakar D, Date K, Saha SK, Garrett DO, Luby SP, Qamar F (2020). Healthcare Utilization Patterns for Acute Febrile Illness in Bangladesh, Nepal, and Pakistan: Results from the Surveillance for Enteric Fever in Asia Project. Clin Infect Dis, 71(Suppl 3), S248-S256.
  21. Hemlock C, Luby SP, Saha S, Qamar F, Andrews JR, Saha SK, Tamrakar D, Date K, Longley AT, Garrett DO, Bogoch II (2020). Utilization of Blood Culture in South Asia for the Diagnosis and Treatment of Febrile Illness. Clin Infect Dis, 71(Suppl 3), S266-S275.
  22. Andrews JR, Barkume C, Yu AT, Saha SK, Qamar FN, Garrett D, Luby SP (2018). Integrating Facility-Based Surveillance With Healthcare Utilization Surveys to Estimate Enteric Fever Incidence: Methods and Challenges. J Infect Dis, 218(suppl_4), S268-S276.
  23. Barkume C, Date K, Saha SK, Qamar FN, Sur D, Andrews JR, Luby SP, Khan MI, Freeman A, Yousafzai MT, Garrett D (2018). Phase I of the Surveillance for Enteric Fever in Asia Project (SEAP): An Overview and Lessons Learned. J Infect Dis, 218(suppl_4), S188-S194.
  24. Sur D, Barkume C, Mukhopadhyay B, Date K, Ganguly NK, Garrett D (2018). A Retrospective Review of Hospital-Based Data on Enteric Fever in India, 2014-2015. J Infect Dis, 218(suppl_4), S206-S213.
  25. Sooksa-Nguan T, Yakubov B, Kozlovskyy VI, Barkume CM, Howe KJ, Thannhauser TW, Rutzke MA, Hart JJ, Kochian LV, Rea PA, Vatamaniuk OK (2008). Drosophila ABC transporter, DmHMT-1, confers tolerance to cadmium. DmHMT-1 and its yeast homolog, SpHMT-1, are not essential for vacuolar phytochelatin sequestration. J Biol Chem, 284(1), 354-362.

Review

  1. Carey ME, MacWright WR, Im J, Meiring JE, Gibani MM, Park SE, Longley A, Jeon HJ, Hemlock C, Yu AT, Soura A, Aiemjoy K, Owusu-Dabo E, Terferi M, Islam S, Lunguya O, Jacobs J, Gordon M, Dolecek C, Baker S, Pitzer VE, Yousafzai MT, Tonks S, Clemens JD, Date K, Qadri F, Heyderman RS, Saha SK, Basnyat B, Okeke IN, Qamar FN, Voysey M, Luby S, Kang G, Andrews J, Pollard AJ, John J, Garrett D, Marks F (2020). The Surveillance for Enteric Fever in Asia Project (SEAP), Severe Typhoid Fever Surveillance in Africa (SETA), Surveillance of Enteric Fever in India (SEFI), and Strategic Typhoid Alliance Across Africa and Asia (STRATAA) Population-based Enteric Fever Studies: A Review of Methodological Similarities and Differences. [Review]. Clin Infect Dis, 71(Suppl 2), S102-S110.