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Patricia Ann Ramaley Brunker, D.Phil., M.D., M.S.

Photo of Dr. Patricia Ann Ramaley Brunker, D.Phil., M.D., M.S.

Assistant Professor of Pathology


Languages: English, French, Spanish

Expertise: Pathology

Research Interests: Transfusion medicine; Alloimmunization


The Johns Hopkins Hospital (Main Entrance)

1800 Orleans St.
Sheikh Zayed Tower
Baltimore, MD 21287 map
Phone: 410-614-0205

Johns Hopkins Bayview Medical Center

4940 Eastern Avenue
Baltimore, MD 21224 map
Phone: 410-614-0205


Dr. Patricia Brunker is an assistant professor of pathology at the Johns Hopkins University School of Medicine. Her area of clinical expertise is transfusion medicine.

Dr. Brunker’s research explores the genetics of the basis of alloimmunization. These projects include the evaluation of rapid-responder and non-responder status in pregnancy and family studies of alloimmunization including microchimerism analysis.

Dr. Brunker received her medical degree from Brown University Medical School. She completed her residency at Brigham and Women’s Hospital in anatomic and clinical pathology and performed a fellowship in transfusion medicine at The Johns Hopkins Hospital and another in the Credentialing Services Section of the National Institutes of Health.

Dr. Brunker is certified in transfusion medicine and anatomic and clinical pathology by the American Board of Pathology. more


  • Assistant Professor of Pathology

Departments / Divisions



  • MD, Brown University Medical School (2003)


  • Brigham and Women's Hospital / Anatomic and Clinical Pathology (2008)


  • Johns Hopkins University School of Medicine / Transfusion Medicine (2009)

Board Certifications

  • American Board of Pathology / Anatomic & Clinical Pathology (2008)
  • American Board of Pathology / Pathology-Transfusion Med (2010)

Research & Publications

Research Summary

Dr. Brunker is using molecular characterization of patients and blood products to inform a patient-centered and individualized approach to transfusion medicine.

Projects in this area include increased utilization and outcomes research in molecular testing, including weak and partial Rh testing, cell-free, fetal DNA and real-time PCR. Dr. Brunker evaluates rapid-responder and non-responder status in pregnancy and also conducts family studies of alloimmunization, including microchimerism analysis, in order to gain a better understanding of the genetics of the basis of alloimmunization.

Selected Publications

  1. Brunker, PA. "Chimerism in transfusion medicine." Chimerism, 4(4). 2013.
  2. Brunker, PA, Flegel, WA. "Scianna: the lucky 13th blood group system." Immunohematology/American Red Cross. 27(2), 41. 2011.
  3. Leider, JP, Brunker, PA, Ness, PM. "Convalescent transfusion for pandemic influenza: preparing blood banks for a new plasma product?" Transfusion. 50(6), 1384-1398. 2010.
  4. Ramaley, PA, French, N, Kaleebu, P, Gilks, C, Whitworth, J, Hill, AV. "HIV in Africa: chemokine-receptor genes and AIDS risk." Nature. 417(6885), 140-140. 2002.
  5. Hellier, S, Frodsham, AJ, Hennig, BJ, Klenerman, P, Knapp, S, Ramaley, P, Satsangi J, Wright M, Zhang L, Thomas HC, Thursz M, Hill AV. "Association of genetic variants of the chemokine receptor CCR5 and its ligands, RANTES and MCP-2, with outcome of HCV infection." Hepatology, 38(6), 1468-1476. 2003.
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