New approach for the elucidation of the etiology of Kawasaki disease

点击翻译按钮获取中文摘要

We collected the samples of throat swab from 58 patients who met the diagnostic criteria for Kawasaki disease and were admitted to our hospitals. Bacteria from throat swab were cultured in liquid culture solution (Brain-Heart-Infusion). W e extracted total DNA from those bacteria using DNA Mini Kit (QIAGEN). Using total DNA extracted from bacteria as a template, polymerase chain reaction (PCR) was performed for 5 SAg genes-streptococcal pyrogenic exotoxin type A(SPE-A), SPE-C, SPE-G, SPE-J, and toxic shock syndrome toxin-1 (TSST -1). SPE-G gene and SPE-J gene were detected in 7 and 6 of 58 patients, respectively. Both SPE-G gene and SPE-J gene were detected in one of 58 patients. Thus, gene fragments of superantigens derived from group A streptococcus (GAS) were detected in the samples of throat swabs from 12 of 58 patients (20.7%). These results were reproducted and very important. However, GAS was not detected from any patients in whom SPE-G and SPE-J gene were detected. Thus, it is very important point and the theme in this study that any kind of bacteria have these superantigen genes. Unfortunately, we could not isolate the bacteria in this study.