Septic arthritis/tenosynovitis in the horse can have life-threatening consequences. The purpose of this cross-sectional retrospective study was to describe ultrasound characteristics of septic arthritis/tenosynovitis in a group of horses. Diagnosis of septic arthritis/tenosynovitis was based on historical and clinical findings as well as the results of the synovial fluid analysis and/or positive synovial culture.

Authors: CM Kramer, AS Tsang, T Koenig, LB Jeffcott, CM Dart and AJ Dart
Journal: Australian Veterinary Journal


To survey veterinary practitioners in Australia on how they administer pentosan polysulfate (PPS) to horses and their perceptions of the efficacy of PPS for: the prevention and treatment of osteoarthritis (OA), the treatment of OA when PPS is combined with other drugs, and the efficacy of PPS compared with other disease-modifying osteoarthritic drugs.

Authors: Jennifer S. Taintor, James Wright, Fred Caldwell, Bailey Dymond, John Schumacher
Journal: Journal of Equine Veterinary Science

Degenerative joint disease (DJD) or osteoarthritis in the equine is largely a result of biomechanical stressors that result in inflammation within the joint, which with continual exposure, leads to progressive degeneration. A myriad of therapies are available for treatment of horses with DJD including nonsteroidal anti-inflammatory drugs, corticosteroids, physiological modifiers, and biological therapies.

Authors: Toby J. Koenig, Andrew J. Dart, C. Wayne McIlwraith, Neil Horadagoda, Robin J. Bell, Nigel Perkins, Christina Dart, Mark Krockenberger, Leo B. Jeffcott and Christopher B. Little
Journal: Veterinary Surgery


To assess the effects of sodium pentosan polysulfate (PPS), N-acetyl glucosamine (NAG), and sodium hyaluronan (HA) in horses with induced osteoarthritis (OA).

Study Design



Adult Standard bred horses (n = 16).

Authors: Alicia L. Bertone, Akikazu Ishihara, Lisa J. Zekas, Maxey L. Wellman, Katharine B. Lewis, Rebecca A. Schwarze, Andrea R. Barnaba, Michael L. Schmall, Peter M. Kanter, Ron L. Genovese
Journal: American Journal of Veterinary Research

Objective—To evaluate intra-articular autologous protein solution (APS) for the treatment of osteoarthritis in horses.

Animals—40 client-owned horses with naturally occuring osteoarthritis.

Authors: M. C. Maher, L. V. Schnabel, J. A. Cross, M. G. Papich, T. J. Divers and L. A. Fortier
Journal: Equine Veterinary Journal

Reasons for study

To determine whether low-dose, low-frequency doxycycline administration is capable of achieving chondroprotective concentrations within synovial fluid (SF) while remaining below minimum inhibitory concentration 90 (MIC90) of most equine pathogens and would be an option in the management of osteoarthritis.

Authors: H. K. Knych, M. A. Vidal, H. C. Casbeer and D. S. McKemie
Journal: Equine Veterinary Journal

Reason for performing study

The use of triamcinolone acetonide (TA) in performance horses necessitates establishing appropriate withdrawal times prior to performance.

To describe the plasma pharmacokinetics of TA and time-related urine and synovial fluid concentrations following i.m. and intra-articular administration to exercised Thoroughbred horses.
Study design

Block design.

Authors: D.D. Frisbie, C.W. McIlwraith, C.E. Kawcak, N.M. Werpy
Journal: The Veterinary Journal

A randomized blinded placebo controlled trial was conducted to assess the clinical, biochemical and histological effects of a hyaluronan, sodium chondroitin sulfate and N-acetyl-d-glucosamine combination (PG) administered through an intra-articular (IA) route for the treatment of osteoarthritis (OA) at the time of injury. OA was induced in one carpal joint of each of 16 horses. Horses were designated placebo or IA PG treated.

Category: Equine - Osteoarthritis
Authors: Melissa R. King, Kevin K. Haussler, Christopher E. Kawcak, C. Wayne McIlwraith, Raoul F. Reiser II
Journal: American Journal of Veterinary Research

Objective—To evaluate the effect of underwater treadmill exercise on static postural sway in horses with experimentally induced carpal joint osteoarthritis under various stance conditions.

Animals—16 horses.

Authors: S. Caston, S. McClure, J. Beug, K. Kersh, E. Reinertson and C. Wang
Journal: Equine Veterinary Journal

Reasons for performing study

While surgical arthrodesis is the treatment of choice for osteoarthritis of the proximal interphalangeal joint, some clients are unable to pursue surgery due to costs. A more economical technique was sought using intra-articular ethyl alcohol injections to facilitate ankylosis.

To describe the technique and outcome of intra-articular ethyl alcohol injections for facilitated ankylosis of proximal interphalangeal joints with osteoarthritis.