International Journal of Systematic and Evolutionary Microbiology, formerly International Journal of Systematic Bacteriology (IJSB), is the official journal of record for novel prokaryotic taxa. It is the official publication of the International Committee on Systematics of Prokaryotes and the Bacteriology and Applied Microbiology Division of the International Union of Microbiological Societies. International Journal of Systematic and Evolutionary Microbiology is published by the Microbiology Society, a learned society that promotes microbiology at all levels.

2015 Impact Factor: 2.439

2015 5-year Impact Factor: 2.782

Editor-in-Chief: Professor Aharon Oren, The University of Jerusalem, Israel


  • ‘Note’ article type renamed to ‘Taxonomic Description’

    International Journal of Systematic and Evolutionary Microbiology (IJSEM) is changing the name of the article type ‘Note’ to ‘Taxonomic Description’.

  • ‘New to Science’ series discusses new species

    Read about the latest microbes isolated from dogs, fish and ice cores described in International Journal of Systematic and Evolutionary Microbiology (IJSEM) at the Microbe Post.

  • Microbiology Society Journals' Prize Winners

    Last year saw the Microbiology Society journals sponsor a number of poster presentation and oral communication prizes. Winners received a cash prize, one year’s complimentary membership to the Microbiology Society and a certificate for best poster or communication. We would also like to thank our Editors for taking part in presenting and awarding these prizes.

  • Altmetric Top 10 Articles 2016

    As 2016 comes to a close, we’ve rounded up the 10 papers from our journals that received the highest scores from Altmetric, the platform that collates where research is being shared online.

  • Archive News page >

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