1 Division of Virology, National Cancer Center Research Institute, Chuo-ku, Tokyo 104, Japan
2 Department of Pediatrics, Japan Red Cross Medical Center, Shibuya-ku, Tokyo 150, Japan
To the Editor.
Microbes have long been suspected to be a causative agent of Kawasaki disease since the original report by Kawasaki.1 Yanagawa et al2 described an epidemic wave of Kawasaki disease spread from central Japan to the entire nation in 6 months. This strongly suggests that an infectious agent might be involved. Furthermore, recent studies by Shulman and Rowley3 and Burnes et al4 have independently demonstrated retrovirus-specific reverse transcriptase activities in the culture supernatants of peripheral mononuclear cells from US patients with Kawasaki disease.