Comment on

• Systematic longitudinal survey of invasive Escherichia coli in England demonstrates a stable population structure only transiently disturbed by the emergence of ST131.

  Kallonen T, Brodrick HJ, Harris SR, Corander J, Brown NM, Martin V, Peacock SJ, Parkhill J. Kallonen T, et al. Genome Res. 2017 Aug 1;27(8):1437-1449. doi: 10.1101/gr.216606.116. Genome Res. 2017. PMID: 28720578 Free PMC article.
• Methicillin-resistant Staphylococcus aureus emerged long before the introduction of methicillin into clinical practice.

  Harkins CP, Pichon B, Doumith M, Parkhill J, Westh H, Tomasz A, de Lencastre H, Bentley SD, Kearns AM, Holden MTG. Harkins CP, et al. Genome Biol. 2017 Jul 20;18(1):130. doi: 10.1186/s13059-017-1252-9. Genome Biol. 2017. PMID: 28724393 Free PMC article.