PMID- 38333512 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20240210 IS - 2168-8184 (Print) IS - 2168-8184 (Electronic) IS - 2168-8184 (Linking) VI - 16 IP - 1 DP - 2024 Jan TI - A Japanese Boy With Spotted Fever and Overlapping Symptoms of Kawasaki Disease: A Case Report. PG - e51915 LID - 10.7759/cureus.51915 [doi] LID - e51915 AB - Japanese spotted fever (JSF) is a tick-transmitted infection caused by Rickettsia japonica (R. japonica), which is indigenous to Japan. Patients with JSF typically present with fever and spotted erythema on the palms and/or soles, and most of them have site(s) of tick bites. The prognosis is good, but some cases have a fatal course. Kawasaki disease (KD) is a systemic vasculitis with an unknown cause that is characterized by symptoms such as fever, conjunctival injection, oral findings, amorphous rash, rigid edema, and nonsuppurative cervical lymphadenopathy. Although the symptoms of JSF are partially similar to those of KD, case reports of JSF overlapping KD have never been internationally published. Herein, we report a boy with JSF and KD symptoms. A five-year-old boy presented with fever and rash after he had been on a mountain inhabited by R. japonica. On the fifth day, erythema was spotted mainly on his bilateral palms, bilateral cervical lymphadenopathy, rigid edema of his lower feet, and mild conjunctival injection appeared. Intravenous immunoglobulin (IVIG) therapy was performed because these symptoms satisfied five out of the six diagnostic criteria for KD. However, on the sixth day, the fever persisted, and then we readministered IVIG in addition to tosufloxacin and azithromycin since we found a tick-bite eschar, which suggested a complication of JSF. His symptoms resolved soon after this treatment. Coronary artery lesions were never observed. This case indicates that the R. japonica infection overlaps clinically with KD. Tosufloxacin and azithromycin should be considered to avoid the use of minocycline in younger patients with JSF. CI - Copyright (c) 2024, Sasaki et al. FAU - Sasaki, Kosuke AU - Sasaki K AD - Department of Community Medicine, Shimane Prefectural Central Hospital, Himebara, JPN. FAU - Yamada, Kenji AU - Yamada K AD - Department of Pediatrics, Shimane University Faculty of Medicine, Izumo, JPN. AD - Department of Pediatrics, Shimane Prefectural Central Hospital, Himebara, JPN. FAU - Matama, Chihiro AU - Matama C AD - Department of Pediatrics, Shimane Prefectural Central Hospital, Himebara, JPN. FAU - Koike, Daisuke AU - Koike D AD - Department of Pediatrics, Shimane Prefectural Central Hospital, Himebara, JPN. FAU - Hirade, Tomohiro AU - Hirade T AD - Department of Pediatrics, Shimane Prefectural Central Hospital, Himebara, JPN. FAU - Mashino, Junji AU - Mashino J AD - Department of General Medicine, Shimane Prefectural Central Hospital, Himebara, JPN. FAU - Kato, Fumihide AU - Kato F AD - Department of Pediatrics, Shimane Prefectural Central Hospital, Himebara, JPN. FAU - Taketani, Takeshi AU - Taketani T AD - Department of Pediatrics, Shimane University Faculty of Medicine, Izumo, JPN. LA - eng PT - Case Reports DEP - 20240108 PL - United States TA - Cureus JT - Cureus JID - 101596737 PMC - PMC10850932 OTO - NOTNLM OT - azithromycin OT - japanese spotted fever OT - kawasaki disease OT - rickettsia japonica OT - tosufloxacin COIS- The authors have declared that no competing interests exist. EDAT- 2024/02/09 06:42 MHDA- 2024/02/09 06:43 PMCR- 2024/01/08 CRDT- 2024/02/09 04:01 PHST- 2024/01/06 00:00 [accepted] PHST- 2024/02/09 06:43 [medline] PHST- 2024/02/09 06:42 [pubmed] PHST- 2024/02/09 04:01 [entrez] PHST- 2024/01/08 00:00 [pmc-release] AID - 10.7759/cureus.51915 [doi] PST - epublish SO - Cureus. 2024 Jan 8;16(1):e51915. doi: 10.7759/cureus.51915. eCollection 2024 Jan.