Spontaneous bilateral superficial digital flexor tendon rupture in a horse with guttural pouch empyema and suspected purpura hemorrhagica
Bibliographic record
Abstract
Summary Case history An 11‐year‐old Quarter Horse gelding was evaluated for urticaria, generalised discomfort, distal limb oedema, spontaneous dropped fetlocks, and progressive hindlimb lameness. Prior infection status with Streptococcus equi subspecies equi was unknown. Clinical findings The horse had bilateral hindlimb oedema, generalised wheals, progressive hindlimb lameness, and dropped fetlocks of the right and left hindlimbs. The horse was intermittently pyrexic and was ultimately subjected to euthanasia due to deteriorating clinical status. Diagnosis Suspected purpura hemorrhagica associated with leukocytoclastic vasculitis of the superficial digital flexor tendons and spontaneous tendon rupture. Treatment and outcome The horse was treated with a combination of antibiotic therapy (enrofloxacin and penicillin), nonsteroidal anti‐inflammatory drugs (phenylbutazone) and corticosteroids (dexamethasone), with no improvement in clinical status. The horse was subjected to euthanasia due to poor prognosis and unfavourable response to therapy. Post‐mortem examination revealed unilateral guttural pouch empyema, multifocal cutaneous infarction and bilateral rupture of the superficial digital flexor tendons. Streptococcus equi subspecies equi was isolated in pure culture from the guttural pouch. Microscopically, leukocytoclastic vasculitis typical of purpura hemorrhagica was documented in the skin. Unexpectedly, similar vasculitis was also observed in the superficial digital flexor tendons. Clinical relevance This report documents the first equine case of suspected purpura hemorrhagica associated with leukocytoclastic vasculitis of the superficial digital flexor tendons and spontaneous tendon rupture. Spontaneous tendon rupture should be considered a potential sequela to infection with Streptococcus equi subspecies equi in horses due to immune‐mediated vasculitis.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.003 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.002 | 0.001 |
| Science and technology studies | 0.002 | 0.002 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.005 | 0.002 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".