An early Code for the nomenclature of bacteria was approved at the 4th International Congress for Microbiology in 1947, but was later discarded.
New bacterial names are reviewed by the ICSP as being in conformity with the Rules of Nomenclature and published in the IJSEM.
[11] The type strain is a living culture to which the scientific name of that organism is formally attached.
For a new species name to be validly published, the type strain must be deposited in a public culture collection in at least two different countries.
[13][14] When a prokaryotic species cannot be cultivated in the laboratory (and therefore cannot be deposited in a culture collection), it may be given a provisional candidatus name, but is not considered validly published.