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


Professor of Medicine, University of Pennsylvania School of Veterinary Medicine

Diplomate, American College of Veterinary Internal Medicine

Clinical Specialties: Internal Medicine,
Research Areas: Hematology, Transfusion Medicine,

Contact Information:
Section of Medicine
Department of Clinical Studies-Philadelphia
School of Veterinary Medicine
University of Pennsylvania

Dr. Callan is a veterinary internist with clinical and research interests in hematology and transfusion medicine. She is particularly interested in evaluation and management of patients with bleeding disorders.

Callan MB, Werner P, Mason NJ, Meny GM, Raducha MG, Henthorn PS. Polymorphisms in canine platelet glycoproteins identify potential platelet antigens Comp Med : , (in press).

Callan MB, Patel RT, Rux AH, Bandyopadhyay S, Sireci AN, O’Donnell PA, Ruane T, Sikora T, Marryott K, Sachais BS, Hod EA. Transfusion of 28-day-old leucoreduced or non-leucoreduced stored red blood cells induces an inflammatory response in healthy dogs. Vox Sanguinis : , 2013.

Mayhew PD, Savigny MR, Otto CM, Brown DC, Brooks MB, Bentley AM, Runge JJ, Callan MB. Evaluation of coagulation in dogs with partial or complete extra-hepatic biliary tract obstruction using thromboelastography. J Am Vet Med Assoc 242: 778-785, 2013.

Callan MB, Shofer FS, Catalfamo JL. Effects of anticoagulant on pH, ionized calcium concentration, and agonist-induced platelet aggregation in canine platelet-rich plasma. Am J Vet Res 70: 472-477, 2009.

Appleman EH, Sachais BS, Patel R, Drobatz KJ, Groman RP, Kennedy DR, O’Donnell PA, Bryan C, Callan MB*. Cryopreservation of canine platelets. J Vet Intern Med 23: 138-145, 2009.

Callan MB, Appelman EH, Sachais BS Canine platelet transfusions J Vet Emerg Crit Care 19: 410-415, 2009.

Callan MB, Appleman EH, Shofer FS, Mason NJ, Brainard BM, Groman RP. Clinical and clinicopathologic effects of plateletpheresis on healthy donor dogs. Transfusion 48: 2214-2221, 2008.

Callan MB, Shofer FS, Catalfamo JL. Effects of anticoagulant on pH, ionized calcium concentration, and platelet aggregation in canine platelet-rich plasma. J Vet Intern Med 22: 776, 2008.

Kaae JA, Callan MB, Brooks MB Hereditary factor VII deficiency in the Alaskan Klee Kai dog. J Vet Intern Med : 976-981, 2007.

Callan MB, Aljamali MN, Margaritis P, Griot-Wenk ME, Pollak ES, Werner P, Giger U, High KA A novel missense mutation responsible for factor VII deficiency in research Beagle colonies J Thromb Haemost : 2616-2622, 2006.

BS (Chemistry) Chestnut Hill College, 1984

VMD (Veterinary Medicine) University of Pennsylvania, 1988