Case Report of Systemic Lupus Erythematosus Presenting as Japanese Spotted Fever with Rickettsia japonica Identified in an Eschar - Summary - MDSpire

Case Report of Systemic Lupus Erythematosus Presenting as Japanese Spotted Fever with Rickettsia japonica Identified in an Eschar

  • By

  • Kento Izuta

  • Masashi Nishikubo

  • Ryohei Nomoto

  • Shuji Sumitomo

  • Yoshinori Matsuoka

  • Ryutaro Seo

  • Hiroaki Nishioka

  • Koichi Ariyoshi

  • Eiichiro Sando

  • February 24, 2026

  • 0 min

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Objective:

To report a complex case of neuropsychiatric systemic lupus erythematosus (NPSLE) presenting with symptoms mimicking Japanese spotted fever (JSF), highlighting the diagnostic challenges.

Key Findings:
  • The patient exhibited symptoms of both NPSLE and JSF, including fever, respiratory failure, and altered consciousness, complicating the clinical picture.
  • PCR testing confirmed the presence of R. japonica in eschars, complicating the diagnosis and indicating a potential co-infection.
  • Clinical features suggested a severe autoimmune response consistent with NPSLE, necessitating prompt treatment.
Interpretation:

The case highlights the diagnostic complexity when autoimmune diseases present with infectious disease-like symptoms, necessitating careful evaluation and interdisciplinary collaboration.

Limitations:
  • The case report is based on a single patient, limiting generalizability and potential biases.
  • Diagnostic challenges may vary in different clinical settings, affecting the applicability of findings.
Conclusion:

This case underscores the importance of considering both infectious and autoimmune etiologies in patients with overlapping clinical features, particularly in endemic regions, to ensure timely and appropriate management.

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