Bacterial infective stifle arthritis secondary to a migrating grass seed foreign body in an adult dog

An adult neutered male cocker spaniel was presented with a 2- to 3-week history of left pelvic limb lameness, stifle effusion, general malaise and pyrexia. Computed tomography imaging revealed an irregular tubular tract, extending from the distally level mid tibial diaphysis, associated long digital extensor muscle. Ultrasonography tract had echogenic contents; however, no foreign body could be identified. Following surgical exploration, grass seed identified in medial compartment stifle. Culture joint capsule tissue yielded growth Pantoea agglomerans. surgery subsequent antibacterial non-steroidal anti-inflammatory medication, dog made full recovery normal activity.