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Nate C. Bahr, MD, MA

Professional Background

Dr. Bahr received his undergraduate degree from Loras College in Dubuque Iowa. He attended medical school at Loyola University Chicago's Stritch School of medicine where he also completed a MA in bioethics and health policy. During medical school Dr. Bahr developed a passion for global health.

Dr. Bahr trained in internal medicine and infectious diseases at the University of Minnesota where he began to develop his career path at the intersection of infectious diseases research and global health. As part of Dr. Bahr's training he received a prestigious Fogarty Fellowship from the NIH and spent that year in Uganda working to improve diagnosis of TB meningitis as part of team at the Infectious Diseases Institute of Makerere University. He subsequently completed his infectious diseases training at the University of Kansas prior to joining the faculty.

Dr Bahr continues to work closely with collaborators in Uganda and around the world with a heavy focus on improving outcomes in persons with TB meningitis and cryptococcal meningitis. He currently has NIH funding with a focus on improving the diagnosis of TB meningitis and histoplasmosis and has established new collaborations to work on HIV-associated histoplasmosis. Dr. Bahr is passionate about leveraging his expertise to work on improving outcomes in conditions that disproportionately affect disadvantaged populations.

Education and Training
  • BS, Biochemistry, Loras College, Dubuque, Iowa
  • MD, Medicine, Loyola University Chicago Stritch School of Medicine, Maywood, Illinois
  • MA, Bioethics and Health Policy, Loyola University Chicago Stritch School of Medicine, Maywood, Illinois
  • Residency, Internal Medicine, University of Minnesota, Minneapolis, Minnesota
  • Other, Internal Medicine, University of Minnesota, Minneapolis, Minnesota
  • Clinical Fellowship, Infectious Diseases, University of Minnesota, Minneapolis, Minnesota
  • Clinical Fellowship, Infectious Diseases, University of Kansas, Kansas City, Kansas
Licensure, Accreditations & Certifications
  • ABIM Infectious Diseases Certification, ABIM
  • ABIM Internal Medicine Certification, ABIM
  • Physician License, KS Board of Healing Arts
Professional Affiliations
  • American College of Physicians, Fellow, 2017 - Present
  • Infectious Disease Society of America, Member, 2012 - Present



Much of Dr Bahr's current research is focused on improving diagnosis of two infectious diseases - histoplasmosis and TB meningitis. Both of these conditions occur in the U.S. and globally. Histoplasmosis is relatively common in Kansas. Both of these conditions are particularly deadly when they occur in people living with HIV. Dr. Bahr is also interested in other infections that similarly affect underserved populations, infections of the central nervous system, the expanding epidemiology of endemic fungi, factors related to pharmaceutical pricing and diagnostic testing in infectious diseases.

Current Research and Grants
  • Novel diagnostic development for TB meningitis and histoplasmosis, NIH, PI
  • Alpern, Jon., D, Joo, Heeso, Link, Ben, Ciaccia, Antonio, Stauffer, William., M, Bahr, Nathan., C, Leventhal, Thomas., M. 2022. Trends in Pricing and Out-of-Pocket Spending on Entecavir Among Commercially-Insured Patients, 2014-2018. JAMA Open, 5 (1), e2144521
  • Quinn, C., M, Kagimu, E, Okirworth, M, Bangdiwala, A., S, Mugumya, G, Ramachandran, P., S, Wilson, M., R, Meya, D., B, Cresswell, F., V, Bahr, N., C, Boulware, D., R. 2021. Fujifilm SILVAMP TB LAM assay on cerebrospinal fluid for the detection of tuberculous meningitis in HIV-infected adults.. Clinical infectious diseases : an official publication of the Infectious Diseases Society of America, 73 (9), e3428-34
  • Martyn, E., M, Bangdiwala, A., S, Kagimu, E, Rutakingirwa, M., K, Kasibante, J, Okirwoth, M, Stead, G, Wadda, V, Pullen, M., F, Bold, T., D, Meya, D., B, Boulware, D., R, Bahr, N., C, Cresswell, F., V. 2021. Cerebrospinal fluid bacillary load by Xpert MTB/RIF Ultra PCR Cycle Threshold value predicts two-week mortality in HIV-associated tuberculous meningitis.. Clinical infectious diseases : an official publication of the Infectious Diseases Society of America, 73 (9), e3505-10
  • Davis, C, Wheat, L., J, Myint, T, Boulware, D., R, Bahr, N., C. 2020. Efficacy of Cerebrospinal Fluid Beta-d-Glucan Diagnostic Testing for Fungal Meningitis: a Systematic Review.. Journal of clinical microbiology, 58 (4)
  • Cresswell, Fiona., V, Tugume, L, Bahr, Nathan., C, Kwizera, R, Bangdiwala, A., S, Musubire, A., K, Rutakingirwa, M, Kagimu, E, Nuwagira, E, Mpoza, E, Rhein, J, Williams, D., A, Muzoora, C, Grint, D, Elliott, A., M, Meya, D., B, Boulware, D., R. 2020. Xpert MTB/RIF Ultra for the diagnosis of HIV-associated tuberculous meningitis: a prospective validation study.. The Lancet. Infectious diseases, 20 (3), 308-317
  • Donovan, J, Cresswell, F., V, Thuong NTT, Boulware, D., R, Thwaites, G., E, Bahr, N., C. 2020. Xpert MTB/RIF Ultra for the Diagnosis of Tuberculous Meningitis: A Small Step Forward.. Clinical infectious diseases : an official publication of the Infectious Diseases Society of America, 71 (8), 2002-2005
  • Cresswell, Fiona., V, Bangdiwala, Ananta., S, Meya, David., B, Bahr, Nathan., C, Vidal, Jose., E, Török, M., Estee, Thao, L., TP, Thwaites, Guy., E, Boulware, David., R. 2018. Absence of Cerebrospinal Fluid Pleocytosis in Tuberculous Meningitis is a Common Occurrence in HIV Co-infection and a Predictor of Poor Outcomes.. International journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases, 68, 77-78.
  • Bahr, Nathan, Nuwagira, Edwin, Evans, Emily., E., Cresswell, Fiona., V., Bystrom, Philip., V., Byamukama, Adolf, Bridge, Sarah., C., Bangdiwala, Ananta., S., Meya, David., B., Denkinger, Claudia., M., Muzoora, Conrad, Boulware, David., R.. 2018. Diagnostic accuracy of Xpert MTB/RIF Ultra for tuberculous meningitis in HIV-infected adults: a prospective cohort study. LANCET INFECTIOUS DISEASES, 18 (1), 68-75.
  • Bahr, Nathan, Tugume, L, Rajasingham, R, Kiggundu, R, Williams, D., A, Morawski, B, Alland, D, Meya, D., B, Rhein, J, Boulware, D., R. 2015. Improved diagnostic sensitivity for tuberculous meningitis with Xpert(®) MTB/RIF of centrifuged CSF.. The international journal of tuberculosis and lung disease : the official journal of the International Union against Tuberculosis and Lung Disease, 19 (10), 1209-15.
  • Bahr, Nathan, Rolfes, M., A, Musubire, A, Nabeta, H, Williams, D., A, Rhein, J, Kambugu, A, Meya, D., B, Boulware, D., R. 2014. Standardized electrolyte supplementation and fluid management improves survival during amphotericin therapy for cryptococcal meningitis in resource-limited settings.. Open forum infectious diseases, 1 (2), ofu070.