Emeritus Faculty

Several of our emeritus faculty gathered together on campus.

From left: Roberta White-Miller, PhD; James Newland, MD; James Landmark, MD; Charles Kuszynski, PhD.  Not shown: S. James Booth, PhD; Nora Chapman, PhD; Mary Haven, MS; Rodney McComb, MD; Phyllis Muellenberg, MA and Steven Tracy, PhD.


S. James Booth, PhD, Professor Emeritus

Medical Education
My primary responsibility is the education of medical and pharmacy students in the area of microbiology with a goal to strive to improve our medical students performance on Part 1 of the United States Medical Licensing Examination (USMLE).

Nora M. Chapman, PhD, Professor Emeritus

Virology and molecular biology
Dr. Champan's primary research focus is on group B coxsackieviruses and their receptor(s).


Mary C. Haven, MS, Professor Emeritus

Clinical Chemistry
Mary Haven mentored medical technologists, developed new procedures, assisted with clinical trials on therapeutic drug monitoring of immunosuppressants, and evaluated new automated analytical instruments.  In 1995, Ms. Haven became the associate dean of UNMC's College of Allied Health Professions.  She expanded the distance-learning program into rural Nebraska offering medical technology, radiaton therapy, radiography and cytotechnology.  Ms. Haven retired from UNMC in July of 2006.  

Charles Kuszynski, PhD, Assistant Professor Emeritus

Flow Cytometry
Dr. Kuszynski is an expert in the application of flow cytometry to biological systems, isolation and characterization of adult stem cells, as well as development of model systems for cell transplantation and gene therapy. He is a member of the Nebraska Center for Virology in Lincoln, NE.

James D. Landmark, MD, Associate Professor Emeritus

Transfusion Medicine
Dr. Landmark is instrumental in our residency and fellowship education as he is a specialist in transfusion medicine and immunohematology and hemolytic disease. He was the former director of the American Red Cross in Nebraska.

Rodney D. McComb, MD, Professor Emeritus

Dr. McComb is a specialist in neuropathology.  His interests include
Brain Tumors, Muscle and Nerve Pathology, Surgical and Autopsy Neuropathology, Neurodegenerative Disease, Electron Microscopy

Phyllis Muellenberg, M.A., Professor Emeritus

Clinical Laboratory Science and Education

James R. Newland, MD, Professor Emeritus

Dr. Newland is a specialist in surgical pathology.  He lectures medical students and is involved in faculty development at UNMC.

Steven M. Tracy, PhD, Professor Emeritus

Enteroviral molecular biology

My laboratory closed for good in mid-2015 when I retired and became Emeritus.  I no longer conduct bench research.  The primary interest of my laboratory was understanding the biology of a common human enterovirus called coxsackievirus B3.  Since 1987 when I joined the UNMC faculty, the laboratory obtained constant funding from diverse sources and published numerous basic research papers, book chapters, monographs and reviews dealing with the molecular biology, immunology, and pathogenesis of the coxsackie B viruses.  The laboratory was nationally and internationally known and respected and trained numerous students and post-docs. My research, begun in Berkeley in the early1980s, illuminated the role of the group B coxsackieviruses as human disease pathogens and developed these viruses as a valuable virological research system with which to better understand the molecular biology of enteroviruses in general.  The work clarified the role of enteroviruses in the causation of acute myocarditis, a disease of the heart muscle which can be lethal or lead to chronic inflammatory heart disease.  We demonstrated how enteroviruses can either cause or protect mice from type 1 diabetes (T1D), work which indicated that an enterovirus-based vaccine should be able to suppress T1D onset and discussed in depth the concept that modern living in a hygienic environment, so different from past human history, led to the increase in T1D cases in modern times.  My laboratory demonstrated a variety of approaches to stably attenuate the pathogenicity of coxsackieviruses, and by inference all other enteroviruses, work which was hoped would help in the design of safe vaccine strains.  We demonstrated that these viruses could be used as expression vectors as well; a patent to this end was granted. Toward the end of my career, a novel genomic deletional pathway by which enteroviruses can persist as an infection long after the acute infection was cleared by the host immune response was discovered and characterized.  My final work delved into microbiology with the discovery that a common waste molecule, creatinine, is a broadly effective antibacterial agent which kills both Gram positive and negative bacterial species as well as antibiotic-resistant strains such as MRSA.  I maintain ongoing consultative collaborations with colleagues at UNMC as well as at Creighton University and Washburn University.

Visit here for a full list of publications.

The International Patent Application number PCT/US2017/0685056, “ANTIMICROBIAL COMPOSITIONS CONTAINING A SYNERGISTIC COMBINATION OF ACTIVATED CREATININE AND AN IMIDAZOLE ANTIFUNGAL AGENT’ was published on July 05, 2018.  Thomas McDonald, PhD, and Steven Tracy, PhD, inventors.

Roberta J. White-Miller, PhD, Professor Emeritus


Dennis Weisenburger, MD, Professor Emeritus

Clinical Hematopathology   
Dr. Weisenburger is a specialist in lymphoma and is board certified in Anatomic and Clinical Pathology from the American Board of Pathology.