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, honey bee (and invertebrate) diseases and health, incorporating diagnostic cases in student education, and providing continuing education and outreach to regional veterinarians.


  • 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

Park, S. A., Sledge, D., Monahan, C. F., Teixeira, L., Boyd, R., Freeman, K., . . . Komáromy, A. M. (2022). Atypical chorioretinal lesions in Siberian Husky dogs with primary angle-closure glaucoma: a case series. BMC Veterinary Research, 18(1). doi:10.1186/s12917-022-03259-8

Monahan, C. F., Garner, M. M., & Kiupel, M. (2022). Chromatophoromas in Reptiles. VETERINARY SCIENCES, 9(3). doi:10.3390/vetsci9030115

Harro, C. C., Refsal, K. R., Shaw, N., Alston, S. M., Folger, W., Gross, C., . . . Langlois, D. K. (2021). Retrospective study of aldosterone and progesterone secreting adrenal tumors in 10 cats. JOURNAL OF VETERINARY INTERNAL MEDICINE, 35(5), 2159-2166. doi:10.1111/jvim.16256

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. JOURNAL OF VETERINARY DIAGNOSTIC INVESTIGATION, 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. JOURNAL OF VETERINARY DIAGNOSTIC INVESTIGATION, 33(5), 932-938. doi:10.1177/10406387211025651

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

Most Cited Publications