Scrub typhus‐associated movement and gait disorders: A systematic review with principal component analysis and in silico mechanistic modelling
Bibliographic record
Abstract
BACKGROUND: Orientia tsutsugamushi, the causative agent of scrub typhus, is increasingly recognised for its neurological complications. Among these, movement and gait disorders are poorly understood. We systematically examined their clinical spectrum and explored underlying mechanisms through in-silico protein-protein interaction modelling. METHODS: A systematic review was conducted following PRISMA guidelines, including studies published up to 5 November 2024. Principal component analysis was used to identify clinical patterns among neurological features. In-silico protein-protein interaction modelling was used to examine potential cross-reactivity between Orientia tsutsugamushi proteins and human targets proteins. RESULTS: Among 76 cases, 50 presented with either isolated or combined movement disorders, most commonly opsoclonus (64.0%, 32/50), with the opsoclonus-myoclonus combination predominating (59.4%, 19/32). Other hyperkinetic features included tremor (4.0%, 2/50) and distinct forms of myoclonus (without opsoclonus) (8.0, 4/50%). Parkinsonism was present in 26.0% (13/50) of cases. Gait disorders, excluding parkinsonian gait and instability due to myoclonus, were well-characterised in 27 patients, one of whom had concomitant opsoclonus and cerebellar ataxia. Ataxic gait was the predominant pattern, observed in 96.3% (26/27), primarily cerebellar in origin. Principal component analysis revealed five principal components reflecting distinct clinical clusters: cerebellar dysfunction, tremor and parkinsonism, sensory ataxia and spinal involvement, myoclonus (diaphragmatic/action/segmental), and prolonged recovery and cranial nerve involvement. In-silico analyses revealed high-confidence interactions between bacterial epitopes and host proteins, including fibronectin-1 and Golgi-associated molecules, suggesting mechanisms of immune-mediated injury and neuroinflammation. CONCLUSIONS: Scrub typhus may lead to a range of movement and gait disorders through neuroimmune mechanisms and molecular mimicry. Principal component analysis offered a data-driven framework to classify these manifestations, highlighting clinically relevant patterns. Early recognition and targeted treatment are critical to improving outcomes. Future studies should validate the molecular targets identified and evaluate immunomodulatory strategies for therapeutic intervention.
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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 | 0.009 | 0.023 |
| Meta-epidemiology (narrow) | 0.002 | 0.001 |
| Meta-epidemiology (broad) | 0.006 | 0.012 |
| Bibliometrics | 0.010 | 0.008 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.002 | 0.001 |
| Open science | 0.003 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.004 | 0.000 |
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".