2) Vannice KS, Ricaldi J, Nanduri S, et al : Streptococcus pyogenes pbp2x mutation confers reduced susceptibility to β-Lactam antibiotics, Clin Infect Dis 71 : 201-204, 2020.
3) Musser JM, Beres SB, Zhu L, et al : Reduced in vitro susceptibility of Streptococcus pyogenes to β-lactam antibiotics associated with mutations in the pbp2x gene is geographically widespread, J Clin Microbiol 58 : e01993-19, 2020.
4) Southon SB, Beres SB, Kachroo P, et al : Population genomic molecular epidemiological study of macrolide-resistant Streptococcus pyogenes in Iceland, 1995 to 2016 : Identification of a Large Clonal Population with a pbp2x Mutation Conferring Reduced In Vitro β-Lactam Susceptibility, J Clin Microbiol 58 : e00638-20, 2020.
5) Ikeda T, Suzuki R, Jin W, et al : Isolation of group A streptococci with reduced in vitro β-lactam susceptibility harboring amino acid substitutions in penicillin-binding proteins in Japan, Antimicrob Agents Chemother 65 (12) : e0148221, 2021.
6) Centers for Disease Control and Prevention (CDC) : Antibiotic Resistance Threats in the United States, 2019 (2019 AR Threats Report).
7) 厚生労働省院内感染対策サーベイランス事業 : 公開情報 2020年1月~12月年報 (集計対象医療機関・200床以上) 院内感染対策サーベイランス検査部門【入院検体】
10) Kimura K, Nagano N, Arakawa Y : Classification of group B streptococci with reduced β-lactam susceptibility (GBS-RBS) based on the amino acid substitutions in penicillin-binding proteins (PBPs), J Antimicrob Chemother 70 (6) : 1601-1603, 2015.
20) Moroi H, Kimura K, Kotani T, et al : Isolation of group B Streptococcus with reduced β-lactam susceptibility from pregnant women, Emerg Microbes Infect 8 (1) : 2-7, 2019.