Colleen Monahan

Senior Veterinary Pathologist
Phone: (603) 862-2726
Office: MCBS / NHVDL, Veterinary Diagnostic Lab, Durham, NH 03824
Pronouns: She/her/hers
Colleen Monahan

I received my veterinary degree from the University of Tennessee: College of Veterinary Medicine in 2015, followed by a residency in anatomic pathology at the Michigan State University Veterinary Diagnostic Laboratory, and became board-certified as a Diplomate of the American College of Veterinary Pathologists in 2018. I joined the New Hampshire Veterinary Diagnostic Laboratory (NHVDL) and UNH in 2018. NHVDL diagnostic cases involve postmortem, surgical pathology, and cytology submissions across a broad range of domestic, exotic, and wildlife species.

My current interests include investigations of infectious and neoplastic disease processes in domestic and exotic animal species, incorporating diagnostic cases in student education, providing continuing education and outreach to regional veterinarians, and collaborating with researchers and wildlife biologists to explore infectious and emerging diseases in New England wildlife.


  • D.V.M., University of Tennessee
  • B.S., Animal Sciences, University of Tennessee

Research Interests

  • Animal Diseases/Pathology
  • Infectious Diseases/Agents
  • Veterinary Medicine
  • Wildlife
  • Zoonotic Diseases

Courses Taught

  • BMS 600: Field Experience
  • BMS 623: Histology\Honors
  • BMS 712: Experience in Vet DIagnostics
  • BMS 799H: Senior Honors Thesis

Selected Publications

Thompson, K. A., Eustace, R., Mavangira, V., Turner, C., & Monahan, C. F. (2021). Left displacement of the abomasum in a reticulated giraffe bull in managed care.. J Vet Diagn Invest, 33(5), 1023-1027. doi:10.1177/10406387211027845

Monahan, C. F., Meyer, A., Garner, M. M., & Kiupel, M. (2021). Gross, histologic, and immunohistochemical characteristics of cutaneous chromatophoromas in captive bearded dragons.. J Vet Diagn Invest, 33(5), 932-938. doi:10.1177/10406387211025651

Imanse, S. M., Monahan, C. F., Thompson, K. A., Marrow, J. C., & Corner, S. M. (2020). Epitheliotropic T-cell lymphoma in 2 half-sibling bontebok. JOURNAL OF VETERINARY DIAGNOSTIC INVESTIGATION. doi:10.1177/1040638720984115

Marinoff, J. L., Monahan, C. F., Kent, M., & Patterson, J. S. (2020). Pathology in Practice. JAVMA-JOURNAL OF THE AMERICAN VETERINARY MEDICAL ASSOCIATION, 256(1), 63-65. Retrieved from

Leisering, A. L., Sola, M. F., Ambrosius, L. A., Monahan, C. F., Meyer, B. A., Deshuillers, P. L., . . . Thompson, C. A. (2019). Pathology in Practice. JAVMA-JOURNAL OF THE AMERICAN VETERINARY MEDICAL ASSOCIATION, 255(4), 433-436. doi:10.2460/javma.255.4.433

Park, S. A., Sledge, D., Monahan, C., Bartoe, J. T., & Komaromy, A. M. (2019). Primary angle-closure glaucoma with goniodysgenesis in a Beagle dog. BMC VETERINARY RESEARCH, 15. doi:10.1186/s12917-019-1812-1

Monahan, C. F., Garner, M. M., & Kiupel, M. (2018). HEPATOCELLULAR NEOPLASMS IN CAPTIVE FENNEC FOXES (VULPES ZERDA). JOURNAL OF ZOO AND WILDLIFE MEDICINE, 49(4), 996-1001. doi:10.1638/2018-0034.1

Iwaki, Y., Monahan, C., Smedley, R., Upchurch, D., & Vilar-Saavedra, P. (2018). Tonsillar plasmacytoma in a dog. CANADIAN VETERINARY JOURNAL-REVUE VETERINAIRE CANADIENNE, 59(8), 851-854. Retrieved from

Eustace, R., Rubin, J., Thompson, K. A., Snowdon, K., Sikarskie, J. G., Monahan, C., & Smedley, R. C. (2017). DIAGNOSIS AND TREATMENT OF A UNILATERAL RENAL CYSTADENOMA IN AN AFRICAN LION (PANTHERA LEO). JOURNAL OF ZOO AND WILDLIFE MEDICINE, 48(3), 906-909. doi:10.1638/2016-0242.1

Monahan, C. F., & Craig, L. E. (2016). Pathology in Practice Comments. JAVMA-JOURNAL OF THE AMERICAN VETERINARY MEDICAL ASSOCIATION, 248(3), 271-273. doi:10.2460/javma.248.3.271

Most Cited Publications