Dr. Arasaratnam graduated from the University of Oxford Medical School with honors (2006) and completed his internal medicine residency in England (2011). He subsequently moved to the United States to pursue further internal medicine training at the University of North Carolina (2013) and Infectious Disease Fellowship at Baylor College of Medicine (2017) with a focus on care of the immunocompromised patient. During his clinical training he obtained a Master in Public Health from the Harvard T.H. Chan School of Public Health (2008) and pursued additional research in translational viral immunology, resulting in one of the first prospective multi-virus characterizations of T cell immunity in a pediatric solid organ transplant cohort, and another study identifying dominant T cell targets of Parainfluenza virus 3 (PIV-3).

 Dr. Arasaratnam joined the UT Southwestern faculty in 2017, predominantly focusing on infectious disease care of the immunocompromised patient. In 2020, he was appointed as the Assistant to the Medical Services Chief for Education at the Dallas VA Medical Center. In this role, he is supporting and growing the current educational activities of this training facility while providing comprehensive inpatient and outpatient infectious disease care for veterans and Attending on Internal Medicine Teaching Service.

 Dr. Arasaratnam is double board certified in Internal Medicine and Infectious Disease through the American Board of Internal Medicine (ABIM) and is also a Member of the Royal College of Physicians (MCRP), United Kingdom. On a national level, he also serves on the Infectious Diseases Item-Writing Task Force for the ABIM and the American College of Rheumatology Clinical Guidance Task Force on COVID-19 vaccination.

 His clinical interests include infectious disease care of the immunocompromised host, viral infections, vaccination and non-tuberculous mycobacterial (NTM) infections. As a medical educator, Dr. Arasaratnam has a strong focus on teaching and assessing clinical reasoning, faculty development and fostering an inclusive clinical learning environment for the trainee. 


Medical School
(2006), Medicine
Graduate School
Harvard University (2008), International Health

Research Interest

  • Infections in the Immunocompromised Host
  • Medical Education
  • Non-tuberculous Mycobacterial Infections
  • Vaccination in Immunocompromised Host
  • Viral Immunology


Featured Publications LegendFeatured Publications

American College of Rheumatology Guidance for COVID-19 Vaccination in Patients With Rheumatic and Musculoskeletal Diseases: Version 1.
Curtis JR, Johnson SR, Anthony DD, Arasaratnam RJ, Baden LR, Bass AR, Calabrese C, Gravallese EM, Harpaz R, Sadun RE, Turner AS, Williams EA, Mikuls TR, Arthritis Rheumatol 2021 07 73 7 1093-1107
American College of Rheumatology Guidance for the Management of Rheumatic Disease in Adult Patients During the COVID-19 Pandemic: Version 1.
Mikuls TR, Johnson SR, Fraenkel L, Arasaratnam RJ, Baden LR, Bermas BL, Chatham W, Cohen S, Costenbader K, Gravallese EM, Kalil AC, Weinblatt ME, Winthrop K, Mudano AS, Turner A, Saag KG, Arthritis & rheumatology (Hoboken, N.J.) 2020 Apr
Letermovir successfully used for secondary prophylaxis in a heart transplant recipient with ganciclovir-resistant cytomegalovirus syndrome (UL97 mutation).
Chong PP, Teiber D, Prokesch BC, Arasaratnam RJ, Peltz M, Drazner MH, Garg S Transpl Infect Dis 2018 Jul e12965
Dynamics of virus-specific T cell immunity in pediatric liver transplant recipients.
Arasaratnam RJ, Tzannou I, Gray T, Aguayo-Hiraldo PI, Kuvalekar M, Naik S, Gaikwad A, Liu H, Miloh T, Vera JF, Himes RW, Munoz FM, Leen AM Am. J. Transplant. 2018 Jun
Ibrutinib Use Complicated by Progressive Multifocal Leukoencephalopathy.
Hsiehchen D, Arasaratnam R, Raj K, Froehlich T, Anderson L, Oncology 2018 95 5 319-322
Characterizing the Cellular Immune Response to Parainfluenza Virus 3.
Aguayo-Hiraldo PI, Arasaratnam RJ, Tzannou I, Kuvalekar M, Lulla P, Naik S, Martinez CA, Piedra PA, Vera JF, Leen AM J. Infect. Dis. 2017 Jul 216 2 153-161
Posttransplant Lymphoproliferative Disease Presenting as an Extracranial Mass.
Arasaratnam RJ, Restrepo A Case Rep Transplant 2017 2017 6401086
Recent advances in the risk factors, diagnosis and management of Epstein-Barr virus post-transplant lymphoproliferative disease.
Aguayo-Hiraldo P, Arasaratnam R, Rouce RH, Bol Med Hosp Infant Mex 2016 Jan - Feb 73 1 31-40
Adoptive T cell therapy for the treatment of viral infections.
Arasaratnam RJ, Leen AM Ann Transl Med 2015 Oct 3 18 278
Quality improvement.
Arasaratnam R, Br J Hosp Med (Lond) 2012 May 73 5 257-61


Featured Books Legend Featured Books

Honors & Awards

  • First Place
    Department of Medicine Housestaff Research Symposium, Baylor College of Medicine, Houston (2016)
  • David Ontjes Award for Outstanding Performance During Residency
    University of North Carolina, Chapel Hill (2012)

Professional Associations/Affiliations

  • Texas Transplant Society (2016)
  • American Society of Transplantation (2013)
  • Infectious Disease Society of America (2013)
  • American College of Physicians (2011)