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Transplant and Oncology Infectious Diseases Program (TOID)

The comprehensive Transplant and Oncology Infectious Diseases (TOID) program was launched in 2008. The mission of the TOID Program, directed by Dr. Kieren Marr, is to expand institutional expertise in clinical and academic activities focused on infectious complications in transplant (solid organ and stem cell) and oncology patients at Johns Hopkins Medical Institutions. In addition to clinical expertise (see below), key efforts are currently directed to developing standardized algorithms for prevention and treatment of infections in these vulnerable patients and to establish an expanded infrastructure to facilitate clinical and translational studies in TOID.

The clinical transplant and oncology infectious disease service, named The Tucker TOID Clinical Service, is dedicated to the scholarship and spirit of Dr. Pamela C. Tucker, who served as teacher and mentor, advocate and healer to patients with infectious diseases, particularly in the fields of transplant and oncology, before her untimely death in November, 2000. The goal of this service is to provide comprehensive inpatient and outpatient care for medically immunocompromised patients at Johns Hopkins.

The TOID program has full-time specialized physicians and a certified nurse practitioner:

Photo of Dr. Kieren Marr, M.D.

Marr, Kieren, M.D.

Professor of Medicine
Professor of Oncology
Director, Transplant and Oncology Infectious Diseases
Vice Chair for Innovation in Healthcare Implementation
Photo of Dr. Robin Kimiko Avery, M.D.

Avery, Robin Kimiko, M.D.

Professor of Medicine
Photo of Dr. Christine Marie Durand, M.D.

Durand, Christine Marie, M.D.

Associate Professor of Medicine
Associate Professor of Oncology
Photo of Dr. Shmuel Shoham, M.D.

Shoham, Shmuel, M.D.

Associate Professor of Medicine
Willa Cochran

Willa Cochran, CRNP

Adult-gerontological Nurse Practitioner

Training in TOID

Training is a large focus of the program. Since its development, Johns Hopkins has been recognized as a primary training site for TOID, and has hosted numerous visiting clinicians, clinical fellows, medical students, and undergraduates for electives in the subspecialty, from both US and international hospitals. A formal curriculum of training at multiple levels has been developed. For more information, contact Darin Ostrander at (410) 614-6702,

The Pamela Cresson Tucker Scholarship Award was established to honor Dr. Tucker's memory by her friends and family. Additional information on the life and career of Dr. Tucker as well as how to apply for a scholarship award or to donate are available at The Pamela Tucker Foundation.

The TOID Center for Clinical Research

Clinical research is supported by a team of clinical research nurses, database and research specialists, with administrative and functional oversight provided by Darin Ostrander PhD and Shmuel Shoham MD.

Darin Ostrander

Darin Ostrander, PhD

Research Associate

Dr. Ostrander has more than 25 years’ experience in antimicrobial research and development.  He assists investigators in administrative and regulatory aspects of clinical research, including IRB applications, NIH and pharmaceutical grant applications, budget development, multicenter administration, and database development.

Donations for Training and Research

If you wish to make a donation to further our research and training efforts, please contact Darin Ostrander at (410) 614-6702 or Dr. Kieren Marr.

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