Dissemination of the phage-associated novel superantigen gene speL in recent invasive and noninvasive Streptococcus pyogenes M3/T3 isolates in Japan

Tadayoshi Ikebe, Akihito Wada^*, Yoshishige Inagaki, Kumiko Sugama, Rieko Suzuki, Daisuke Tanaka, Aki Tamaru, Yoshihiro Fujinaga, Yoshiaki Abe, Yoshikata Shimizu, Haruo Watanabe

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