International Journal of Infectious Diseases (May 2022)

Platelet Indices Are the Promising Biomarkers in Monitoring Disease Activities in Patients with Syphilis

  • Nanyan Jiang,
  • Meiping Ye,
  • Jingmin Yan,
  • Chunjie Liao,
  • Mengya Shang,
  • Guixuan Wang,
  • Ruirui Peng,
  • Juan Wu,
  • Tengfei Qi,
  • Liyan Ni,
  • Zhifang Guan,
  • Wei Zhao,
  • Pingyu Zhou

Journal volume & issue
Vol. 118
pp. 230 – 235

Abstract

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Objectives: To uncover the role of the platelet indices in patients with syphilis. Methods: A total of 2061 patients with syphilis and 528 healthy controls were enrolled in this retrospective cohort study. The data of platelet count (PLT), mean platelet volume (MPV), platelet distribution width (PDW), and indicators of syphilis activities were collected. The correlations between the platelet indices and disease activities were analyzed. Results: A total of 425 (20.6%) of the 2061 patients were of primary and secondary syphilis, 433 (21.0%) latent, 463 (22.5%) serofast, 350 (17.0%) asymptomatic neurosyphilis, and 390 (18.9%) symptomatic neurosyphilis. Compared with the healthy controls, PLT was significantly increased in the primary and secondary syphilis group; whereas, MPV and PDW were significantly decreased in all stages of syphilis. These changes of platelet indices were reversed after anti-treponemal therapy. Further correlation analysis showed that PLT was positively associated with the syphilis activity indicators [rapid plasma reagin (RPR) titer, cerebrospinal fluid white blood cell (CSF-WBC), CSF-protein, and CSF-VDRL (venereal disease research laboratory)] and inflammatory markers [WBC, C-reaction protein (CRP), and erythrocyte sedimentation rate (ESR)]. Conversely, PDW was negatively correlated with all of these parameters. MPV had an inverse relationship with RPR, ESR, and CRP. Conclusions: Platelet indices are associated with syphilis activities.

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