Abstract
In 1987, ASM Press published the hefty two-volume book Escherichia coli and Salmonella typhimurium: Cellular and Molecular Biology (1), which evolved after a second printed edition (2) into an online subscription-based publication called EcoSal and then into the online journal EcoSal Plus (3). The “Plus” refers to the inclusion of the rest of the Enterobacterales order, including Klebsiella, Yersinia, and Shigella. In the latest segment of this 40-year journey, EcoSal Plus has merged with Microbiology and Molecular Biology Reviews (MMBR), where it now continues as a collection within the journal, with a dedicated editorial board (4).

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