Faculty » Faculty Directory

Faculty Directory

John Keiser John Keiser
Associate Professor of Pathology

Office Phone: 202-715-4657
Email: Email
Department: Pathology


  • BS, Le Moyne College, 1967
  • MD, Pennsylvania State University, Hershey, 1973
  • PhD, Pennsylvania State University, Hershey, 1974


John F. Keiser, MD, PhD is an associate professor in the Department of Pathology at The George Washington University School of Medicine and Health Sciences. He is the Director of Clinical Microbiology/Serology. Before joining George Washington University he was Chief of Clinical Microbiology at the Walter Reed Army Medical Center, Washington, D.C. 

Clinical Expertise

Dr. Keiser's clinical practice is to provide clinical is to provide clinical microbiology expertise to the clinical faculty at The George Washington University Hospital. he works closely with the Infectious Disease facutly and fellows. Additional assistance is provided to any clinical attending and the medical students assigned to the services. In addition, he is a member of the Infection Prevention and Emergency Preparedness Committess.


The clinical microbiology laboratory supports the research efforts of the Infectious Disease Department. In addition, research projects initiated by pathology residents is strongly encouraged. Projects using molecular technology has been recently completed with the Neonatology Service.


View publications by this faculty member.

Akselrod H, Swierzbinski M, Zheng Z, Keiser J, David P, Simon G. Characteristics and Severity of Disease among 100 Cases of Imported Malaria Seen at a U.S. University Hospital. AM. J. Trop. Med. Hyg., 2018, pp.1511-1517

Amado, C., Blair, P., Keiser, J., & Siegel, M. (2017). The Impact of Infectious Diseases Consultation on the Choice of Antifungal Therapy in Patients With Candidemia. Infectious Diseases in Clinical Practice. 2017 Jan; 25 (1):33-36

Aesif SW, Delman M, Keiser JF. A Case of Enterococcus casseliflavus Endocarditis. Clinical Microbiology Newsletter; 37:5

Swierzbinski M, Pandya S, Zelzany A, Keiser J, Siegel M. Diagnostic Challenges in the Identification of Rothia aeria Bacteremia in a Patient With Relapsing Acute Myeloid Leukemia. Infectious Diseases in Clinical Practice. 2015;23:336-338

Ng M, Epstein SB, Callahan MT, Piotrowski B, Simon GL, Roberts AD, Keiser JF, Kaplan. Induction of MRSA Biofilm by Low-Dose ?-Lactam Antibiotics: Specificity, Prevalence and Dose-Response Effects. Dose Response. 2013 Jul 25; 12 (1) : 152-61. doi: 10.2203/dose-response. 13-021. Kaplan. eCollection 2014.

Industry Relationships and Collaborations

This faculty member (or a member of their immediate family) has reported a financial interest with the health care related companies listed below. These relations have been reported to the University and, when appropriate, management plans are in place to address potential conflicts.

  • None