New Bolton Center Kennett Square, PA
Emergencies & Appointments:
Ryan Hospital Philadelphia, PA


Assistant Professor of Large Animal Surgery – CE, University of Pennsylvania School of Veterinary Medicine

Charles W. Raker Assistant Professor of Equine Orthopedic Surgery, New Bolton Center, University of Pennsylvania School of Veterinary Medicine

Clinical Specialties: Large animal surgery
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Stewart, Holly L. Aneurysmal bone cysts as a diagnostic consideration in juvenile patients: Considerations from humans and animals Equine Veterinary Education : , 2022.

Gadomski, B. C., Labus, K. M., Stewart, H. L., Bisazza, K. T., Nelson, B. B., Puttlitz, C. M., McGilvray, K. C., Regan, D. P., Easley, J. T. A large animal model for orthopedic foot and ankle research Front Vet Sci 9: 816529, 2022.

Stewart, H. L., Easley, J. T., Selberg, K. T., Puttlitz, C. M., Nakamura, L. K., Johnson, J. W., Kawcak, C. E. Experimental models of bone marrow lesions in ovine femoral condyles Vet Surg : , 2022.

Stewart, H. L., Engiles, J. B., Richardson, D. W., Levine, D. G. The clinical and histopathologic effects of potentiated chlorhexidine in the upper respiratory tract of horses Vet Surg 50: 1209-1217, 2021.

Stewart, H. L., Kawcak, C. E., Inscoe, C. R., Puett, C., Lee, Y. Z., Lu, J., Zhou, O. Z., Selberg, K. T. Comparative evaluation of tomosynthesis, computed tomography, and magnetic resonance imaging findings for metacarpophalangeal joints from equine cadavers Am J Vet Res 82: 872-879, 2021.

Stewart, H. L., Pitta, D., Indugu, N., Vecchiarelli, B., Hennessy, M. L., Engiles, J. B., Southwood, L. L. Changes in the faecal bacterial microbiota during hospitalisation of horses with colic and the effect of different causes of colic Equine Vet J 53: 1119-1131, 2021.

Stewart, H. L., Siewerdsen, J. H., Nelson, B. B., Kawcak, C. E. Use of cone-beam computed tomography for advanced imaging of the equine patient Equine Vet J 53: 872-885, 2021.

Yang, Y. P., Gadomski, B. C., Bruyas, A., Easley, J., Labus, K. M., Nelson, B., Palmer, R. H., Stewart, H., McGilvray, K., Puttlitz, C. M., Regan, D., Stahl, A., Lui, E., Li, J., Moeinzadeh, S., Kim, S., Maloney, W., Gardner, M. J. Investigation of a prevascularized bone graft for large defects in the ovine tibia Tissue Eng Part A 27: 1458-1469, 2021.

Pitta, Dipti, Indugu, Nagaraju, Hennessy, Meagan, Vecchiarelli, Bonnie, Stewart, Holly, Willette, Jackie, Dobbie, Tamara, Engiles, Julie, Southwood, Louise 358 Understanding the role of the fecal bacterial microbiota in equine colic Journal of Animal Science 98: 94-94, 2020.

Stewart, H. L., Werpy, N. M., McIlwraith, C. W., Kawcak, C. E. Physiologic effects of long-term immobilization of the equine distal limb Vet Surg 49: 840-851, 2020.

Stewart, H. L., Southwood, L. L., Indugu, N., Vecchiarelli, B., Engiles, J. B., Pitta, D. Differences in the equine faecal microbiota between horses presenting to a tertiary referral hospital for colic compared with an elective surgical procedure Equine Vet J 51: 336-342, 2019.

Stewart, H. L., Engiles, J. B., Stefanovski, D., Southwood, L. Clinical and intestinal histologic features of horses treated for recurrent colic: 66 cases (2006-2015) J Am Vet Med Assoc 252: 1279-1288, 2018.

Stewart, H. L., Kawcak, C. E. The importance of subchondral bone in the pathophysiology of osteoarthritis Front Vet Sci 5: 178, 2018.

Stewart, H. L., Pitta, D., Indugu, N., Vecchiarelli, B., Engiles, J. B., Southwood, L. L. Characterization of the fecal microbiota of healthy horses Am J Vet Res 79: 811-819, 2018.

Engiles, J. B., Stewart, H., Janes, J., Kennedy, L. A. A diagnostic pathologist''s guide to carpal disease in racehorses J Vet Diagn Invest 29: 414-430, 2017.

VMD (Veterinary Medicine) University of Pennsylvania School of Veterinary Medicine, 2012

PhD (Orthopedics) Colorado State University, 2021