Judith Koenig

Judith Koenig head shot

Department Chair | Associate Professor

 Mag Med vet, Dr Med Vet, DVSc, DACVS, DACVSMR
 Office: CS 2141
 519-824-4120 Ext. 54051


Research Interests

Research Interests

  • Tissue regeneration and healing
  • Osteoarthritis


Current Research

  • Use of allogeneic cord blood stem cells for tissue regeneration
  • Effect of shockwave on stem cells
  • Effect of shockwave on wound healing in horses
  • Evaluation of the significance of caudal facet arthropathy in Sports horses
  • Evaluation of different medications on coffin joint osteoarthritis 
  • Rehabilitation


Graduate Students


Dr Lynn Williams (2012 - 2015)



Dr. Andres Giraldo (2019-current)

Dr. Alejandro Merchan Munoz (2018-current)

Dr. Rames Salcedo (2015- 2019)

Dr. Collette Elmas (2008 -2012)

Dr. Andressa Silveira (2006-2009)



Dr. Juan Pineros Vargas (2014-2015)

Dr. Christina Martin (part time, completed 2014)


Large Animal Surgery Resident

Dr. Celine Bourzac (2010 – 2013)

Current Graduate Students

  • Andres Giraldo Fajardo - DVSc
  • Alejandro Merchan Munoz - DVSc

Selected Publications

Koenig J, Westlund A, Nykamp S, Kenney D, Melville L, Cribb N, Oberbichler D. Case-control comparison of cervical spine radiographs from horses with a clinical diagnosis of cervical facet disease, with normal horses. JEVS 2020 Sept 92 ():

Beaulieu A, Linden AZ, Phillips J, Arroyo LG, Koenig J, Monteith G. Various 3D printed materials mimic bone ultrasonographically: 3D printed models of the equine cervical articular process joints as a simulator for ultrasound guided intra-articular injections. PLoS One. 2019 Aug 6;14(8)

Koenig JB, Sinclair M, Sorge US. Comparison of the use of a braided multifilament transfixation suture for field castration with other castration techniques. Eq Vet Edu 2019 Aug; 31(8): 427-431. 

Salcedo R, Gomez DE, Krueger E, Koenig J. Incarceration of the small intestine through a rent in the ileocecal fold in a horse. Can Vet J. 2019 May;60(5):477-479.

Koenig JB, Silveira A, Cribb NC, Piat P, Laverty S, Sorge US. Clinical indications, complications, and long-term outcome of esophageal surgeries in 27 horses. Can Vet J. 2016 Dec;57(12):1257-1262.

Williams LB, Co C, Koenig JB, Tse C, Lindsay E, Koch TG. Response to Intravenous Allogeneic Equine Cord Blood-Derived Mesenchymal Stromal Cells Administered from Chilled or Frozen State in Serum and Protein-Free Media. Front Vet Sci. 2016 Jul 22;3:56. 

Williams LB, Russell K, Koenig JB, Koch TG. (2016) Aspiration, but not injection, decreases equine mesenchymal stromal cell viability. BMC Vet Res. 2016 Mar 7;12:45

Williams LB, Koenig JB, Black B, Gibson TW, Sharif S, Koch TG. Equine allogeneic umbilical cord blood derived mesenchymal stromal cells reduce synovial fluid nucleated cell count and induce mild self-limiting inflammation when evaluated in an LPS induced synovitis model. Equine Vet J. 2015 Jun 26.

Cribb N, Koenig JB, Sorge U. Comparison of laparoscopic and conventional cryptorchidectomy on rate of intra-operative and post-operative complications, length of surgery and anesthesia and hospital stay. J Am Vet Med Assoc. 2015 Apr 15;246(8):885-92.

Williams LB, Tessier L, Koenig JB, Koch TG. Post-thaw non-cultured and post- thaw cultured equine cord blood mesenchymal stromal cells equally suppress lymphocyte proliferation in vitro. PLoS One. 2014 Dec 1;9(12)

Bourzac, C., Koenig, J., Link, K., Nykamp, S., & Koch, T. Comparative labeling of equine umbilical cord blood-derived and bone marrow-derived mesenchymal stromal cells with Molday ION Rhodamine B for ex vivo cell tracking with MRI.  Am J Vet Res. 2014,  Nov;75(11):1010-7.

Link, K., Koenig, JB., Silveira, A., Plattner, B. L., & Lillie, B. (2013). Effect of unfocused extracorporeal shock wave therapy on growth factor gene expression in wounds and intact skin of horses.  American Journal of Veterinary Research, 74 (2), 324-32.

Elmas, C. R., Koenig, J., Bienzle, D., Cribb, N. C., Cernicchiaro, N., Cote, N.C., Weese, S.J. (2013). Evaluation of a broad-range real time PCR assay for the diagnosis of septic synovitis in horses. Canadian Journal of Veterinary Research, 77 (3), 211-17.

Koenig, J. B., Silveira, A., Chalmers, H., Buenviaje, G., & Lillie, B. N. (2012). Laryngeal neuroendocrine tumor in a horse.  Equine Veterinary Education, 24 (1), 12-16.

Beeler-Marfisi J, Gallastegui Menoyo A, Beck A, König J, Hewson J, Bienzle J: Gelatinous marrow transformation and hematopoietic atrophy in a miniature horse stallion. (Vet Pathology 2011 Mar; 48(2): 451-5)

Silveira A, Koenig JB*, Arroyo, L, Trout D, Moens N, LaMarre J, Brooks A,:  Effect of unfocused extracorporeal shockwave therapy on healing of equine wounds ( Am J Vet Res; 2010; 71(2): 229-234)

Valverde A, Crawshaw GJ, Cribb N, Bellei M, Gianotti G, Arroyo L, Koenig J, Kummrow M, Costa MC. Anesthetic management of a white rhinoceros (Ceratotherium simum) undergoing an emergency exploratory celiotomy for colic. (Vet Anaesth Analg 2010; 37(3): 280-5)

Koenig JB, Silveira A: Use of shockwave in treatment of wounds in horses. Newsletter of the International Veterinary Society for Wound Healing April 2009.

Koenig JB, Hart J, Harris D, Cruz A, Bienzle D: Evaluation of endotoxin activity in whole blood measured by neutrophil chemiluminescence in healthy horses and horses with colic ( Am J Vet Res 2009: 70 (10):1183-86)

Koenig JB, Martin C, Dobson H, Mintchev MP: Use of multi-channel electrogastrography (EGG) for non-invasive assessment of gastric myoelectrical activity in dogs. (Am J Vet Res; 2009; 70: 11-15)

Koenig JB, Martin C, Nykamp G, Mintchev MP: Use of multi-channel electrointestinography for non-invasive assessment of large intestinal myoelectrical activity in horses. (Am J Vet Res; 2008; 69 (6))

Rubio-Martinez LM, Koenig JB, Halling KB, Wilkins K, Schulz K: Use of a circular external skeletal fixator for stabilization of a comminuted diaphyseal metatarsal fracture in an alpaca (JAVMA; 2007; 230:7:1044-49)

Koenig JB, Rodriguez A, Colquhoun JK, Staempfli H: Congenital colonic malformation (“short colon”) in a 4-month-old Standardbred foal (Can Vet J; 2007; 48: 416-419).

Chenier T, Estrada A, Koenig JB: Theriogenology Question of the Month: diagnosis and treatment of a ruptured vaginal tunique in a thoroughbred stallion (JAVMA; 2007;230: 10: 1469-1472)

Koenig J, Sawhney S, Cote N, LaMarre J The effect of inflammation on motilin receptors and binding of erythromycin lactobionate in the equine jejunum. (Am J Vet Res; 2006 67: 815-820 )

Koenig J, Cote N: Equine Gastrointestinal Motility. (Can Vet J 2006;47:551–559)

Koenig J, Cruz A, Genovese R, Fretz P, Trostle S: Rupture of the peroneus tertius tendon in 27 horses (Can Vet J 2005; 46 (6),503-506)

Koenig J., McDonell WN., Valverde A.:  Accuracy of pulse oximetry and capnography in healthy and compromised horses during general anesthesia.(Can J Vet Res 2003; 67(3), 169-174)

Koenig J, Cote N, Lamarre J, Harris W, Trout D, Kenney D, Monteith G.: Binding of radiolabeled porcine motilin and erythromycin lactobionate to smooth muscle membranes in various segments of the equine gastrointestinal tract  (Am J Vet Res 2002; 63 (11), 1545 – 50)

Koenig JB., Watrous BJ., Kaneps AJ., Adams JG., Parker JE.:  Otitis Media in a 7 Month Old Female Llama (JAVMA, 2001, 218(10), 1619-1623)

Boutros CP, Koenig JB: A combined frontal and maxillary sinus approach for repulsion of the third maxillary molar in a horse. (Can Vet J, 2001, 42 (4), 286-288)

Koenig J., Hurtig M., Pearce, S., Henderson J., Morris, T.: Ballistic shockwave lithotripsy in an 18 year old Thoroughbred gelding, ( Can Vet J, 1999 Mar. 40(3), 185-6.)

Search PubMed for additional publications by Dr. Koenig.