Department of Comparative Pathobiology (CPB)

Improving the Health of Humans and Animals

Welcome to the Department of Comparative Pathobiology
Comparative Pathobiology is the study of disease phenomena basic to all species including humans, at the molecular, cellular, organismal and ecosystem level. Our faculty, staff and students are involved in research and learning in a variety of areas including pathobiology, infectious diseases and vaccines, cancer biology, nanomedicine, toxicology, disease surveillance and human-animal interactions.
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John A. Christian, DVM (Honors), PhD

John A. Christian, DVM (Honors), PhD


Dr. John Christian’s clinically oriented research involves validation of new instruments and assays used for monitoring health and diagnosing/monitoring disease states in veterinary patients. We ensure equipment and assays meet standards for diagnostic accuracy and precision. The Clinical Pathology Lab’s state of the art instrumentation is maintained with appropriate quality control and quality assurance programs that offer the follow testing categories: hematology, hemostasis, clinical chemistry, urinalysis, endocrine and diagnostic cytology. We can support clinical diagnostic testing and a variety of research projects that use these testing modalities. Accurate test results aid clinicians in clinical decision making. Laboratory support of research studies leads to a wide range of benefits potentially involving many disciplines. Research is directly related to veterinary medicine by testing blood and other body fluids in a wide range of veterinary patients and research projects. Dr. Christian teaches veterinary clinical pathology, which includes sub-disciplines such as hematology, hemostasis, clinical chemistry profiling of major organ systems, and diagnostic cytology.  These classes include basic principles of normal physiology of health and mechanisms of diseases (pathology) that disturb health. Teaching is at all levels of the veterinary team including veterinary technology students, DVM students, interns, residents and graduate students.

On a somewhat informal basis, Dr. Christian also provides thoughts, anecdotes and principles of non-technical skills into his formal classes to help mentor students in coping, self-awareness, healthy self-talk, and other facets of emotional intelligence that are critical to success in professional education and practice.


Dr. Christian engages in public speaking at veterinary continuing education seminars and workshops in the same subject areas as described in teaching.

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