Spinal infection tied to bite wounds in a wild porcupine case report: full analysis

A case report published April 28, 2026, in Veterinary Sciences details spinal epidural empyema associated with bite wounds in an adult Indian crested porcupine, offering a rare look at how chronic traumatic wounds can progress to spinal cord compression in a wildlife patient. The porcupine arrived with paraplegia, preserved nociception, and exudative paravertebral wounds, and ultimately recovered after decompressive surgery, drainage, and culture-guided antimicrobial therapy. (mdpi.com)

That matters because spinal epidural empyema is uncommon in veterinary medicine and even less well described in wildlife species. In dogs, published case series describe it as a neurological emergency that can arise through hematogenous spread, extension from nearby tissues, direct trauma, foreign bodies, or invasive procedures, with pain and progressive neurologic deficits among the more common signs. In cats, case reports have similarly emphasized that diagnosis can be missed without advanced imaging and that delayed recognition risks permanent deficits. (mdpi.com)

In the porcupine case, survey radiography and contrast myelography identified an extradural compressive lesion at L1–L2. Surgical exploration then found a purulent tract extending from the skin through paraspinal tissues into the vertebral canal. The team performed a left L1–L2 hemilaminectomy with drainage, debridement, lavage, and Penrose drain placement. Bacterial culture grew Staphylococcus aureus, and antimicrobial therapy was adjusted based on susceptibility testing. Postoperative care included physiotherapy and environmental modifications to support ambulation. According to the report, the porcupine was walking again within four days and was released about 50 days after surgery with normal gait and tail-rattling behavior. (mdpi.com)

The broader literature helps explain why this case is notable. A 30-dog retrospective study found that SEE often presents with pain and neurologic dysfunction, and that MRI is especially valuable for diagnosis and follow-up, though the porcupine report shows contrast myelography can still be clinically useful when MRI is not part of the workup. That same canine study reported favorable outcomes with both medical and surgical treatment, but suggested surgery may offer better short-term improvement in non-ambulatory or paraplegic patients. Inference: that aligns with the aggressive surgical approach taken here, given the porcupine’s paraplegia and documented compressive lesion. (mdpi.com)

Published veterinary reports also show that epidural empyema can follow penetrating or migrating material, not just hematogenous infection. A feline case linked SEE to grass awn migration, and older canine reports have described epidural abscesses associated with osteomyelitis or migrating plant material. Taken together with the new porcupine report, the pattern is consistent: when a patient has focal spinal pain or deficits plus evidence of chronic wounds, foreign-body injury, or local infection, clinicians may need to think beyond superficial trauma. (pubmed.ncbi.nlm.nih.gov)

Why it matters: For veterinarians, especially those in wildlife, exotics, emergency, surgery, and neurology settings, this is a reminder that draining bite wounds over the vertebral column can represent a route for deep infection and spinal canal involvement. The case supports including spinal epidural empyema on the differential list for paraplegic patients with paraspinal wounds, obtaining culture when possible, and moving quickly on decompression when imaging and neurologic findings indicate clinically important cord compression. It also underscores the practical importance of rehabilitation and enclosure or environmental modifications in recovery, even for nontraditional species. (mdpi.com)

What to watch: The next question is whether this remains an isolated case report or becomes the start of a broader body of evidence in wildlife and exotic species. Additional reports could help define the microbiology, preferred imaging pathways where MRI access is limited, and which patients can be managed medically versus those that benefit most from early surgery. (mdpi.com)