The International Journal of Systematic and Evolutionary Microbiology (IJSEM) is a peer-reviewed academic journal in the field of microbial systematics, first published in 1951. Its scope covers the taxonomy, nomenclature, identification, characterisation, culture preservation, phylogeny, evolution and biodiversity of all microorganisms, including prokaryotes, yeasts and yeast-like organisms, protozoa and algae. IJSEM is currently published monthly by the Society for General Microbiology, Reading, UK.