Colleen Monahan

Colleen Monahan

Senior Veterinary Pathologist, DVM Dipl DACVP
Foreign Animal Disease Coordinator
Phone: (603) 862-2726
Office: MCBS / NHVDL, Veterinary Diagnostic Lab, Durham, NH 03824
Pronouns: She/her/hers

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 terrestrial invertebrate diseases and health, incorporating diagnostic cases in student education, and providing continuing education and outreach to regional veterinarians.

Courses Taught

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


  • 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

Selected Publications

  • Saleh, M. N., Ramos, R. A. N., Verocai, G. G., Monahan, C. F., Goss, R., & Needle, D. B. (2024). Apparent fatal winter tick (Dermacentor albipictus) infestation in captive reindeer (Rangifertarandus).. Int J Parasitol Parasites Wildl, 23, 100900. doi:10.1016/j.ijppaw.2023.100900

  • Monahan, C. F., Bogan, J. E., & LaDouceur, E. E. B. (2023). Histological Findings in Captive Madagascar Hissing Cockroaches (Gromphadorhina portentosa) and a Literature Review.. Vet Pathol, 60(5), 667-677. doi:10.1177/03009858231166659

  • Nelson, J. T., Monahan, C. F., Sledge, D. G., & Kim, S. (2023). Retained cartilaginous core in the distal radius of a small breed dog.. J Small Anim Pract, 64(5), 359-362. doi:10.1111/jsap.13593

  • 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

  • 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

  • Most Cited Publications