Long-term clinical sequelae in severe fever with thrombocytopenia syndrome: A longitudinal cohort study.
<h4>Background</h4>Severe fever with thrombocytopenia syndrome (SFTS) is an emerging tick-borne infectious disease characterized by a high case fatality rate. Despite extensive research on acute-phase manifestations, the long-term clinical sequelae in survivors remain poorly characterize...
Saved in:
| Main Authors: | , , , , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Public Library of Science (PLoS)
2025-08-01
|
| Series: | PLoS Neglected Tropical Diseases |
| Online Access: | https://doi.org/10.1371/journal.pntd.0013276 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | <h4>Background</h4>Severe fever with thrombocytopenia syndrome (SFTS) is an emerging tick-borne infectious disease characterized by a high case fatality rate. Despite extensive research on acute-phase manifestations, the long-term clinical sequelae in survivors remain poorly characterized.<h4>Methods</h4>In this prospective cohort study from 2010 to 2024, 1,197 SFTS survivors and 188 age/sex-matched febrile controls without SFTS were enrolled from the highest endemic region in China. Participants underwent face-to-face interview, serial clinical evaluations and laboratory testing at 6, 12, 18 and 24 months post-discharge, with extended follow-up for a subset (n = 294) over 11 years. Propensity score matching and multivariate logistic regression were used to determine the factors associated with long-term sequelae risk.<h4>Results</h4>A total of 62.57% (749/1,197) of survivors developed persistent sequelae, significantly higher than controls (51.60%, 97/188; P < 0.05). Key manifestations included memory impairment (33.50%, 401/1,197), arthralgia (33.08%, 396/1,197), alopecia (32.25%, 386/1,197) and visual decline (31.08%, 372/1,197). Laboratory abnormalities persisted for ≥10 years in 0.33% of survivors, notably thrombocytopenia, elevated lactate dehydrogenase, and cystatin C. Compared to non-SFTS group, a significantly higher proportion of SFTS survivors had decreased white blood cell count, eosinophil percentage and mean corpuscular hemoglobin. The long-term sequelae risk exhibited distinct patterns across factors: encephalitis development was associated with significantly higher risks of memory impairment (adjusted OR = 2.39) and thrombocytopenia (adjusted OR = 3.36); corticosteroid usage during hospitalization showed increased risks of arthralgia (adjusted OR=2.17) and elevated BUN (adjusted OR=3.87); while high viral load (≥1 × 106 copies/mL) exhibited significantly higher incidences of most prevalent clinical manifestations and multiple laboratory abnormalities (all P < 0.05).<h4>Conclusion</h4>SFTS survivors exhibit multisystemic sequelae, with high viral load and acute-phase neurological involvement serving as critical prognostic indicators. These findings underscore the need for long-term monitoring and targeted therapeutic strategies for SFTS. |
|---|---|
| ISSN: | 1935-2727 1935-2735 |