RT Journal Article SR Electronic(1) A1 Garvie, Ellen I.YR 1986 T1 Request for an Opinion: Conservation of the Name Pediococcus acidilactici with DSM 20284 as the Neotype Strain and Rejection of the Previous Neotype Strain NCDO 1859 (= IFO 3884 = DSM 20333 = ATCC 33314) JF International Journal of Systematic and Evolutionary Microbiology, VO 36 IS 4 SP 579 OP 580 DO https://doi.org/10.1099/00207713-36-4-579 PB Microbiology Society, SN 1466-5034, AB Strain NCDO 1859 (= IFO 3884) was selected as the neotype strain of Pediococcus acidilactici by Garvie in 1974 and was confirmed as such on the Approved Lists in 1980. P. acidilactici and Pediococcus pentosaceus are difficult to separate by using only phenotypic data, and the choice of NCDO 1859 relied on such data. Subsequently, two independent deoxyribonucleic acid (DNA)-DNA homology studies have shown that the DNA of NCDO 1859 has high levels of homology with the DNAs of strains of P. pentosaceus, including the type strain (93 to 100%), but low levels of homology (20 to 34%) with authentic strains of P. acidilactici. Moreover, the guanine-plus-cytosine content of the DNA of NCDO 1859 is within the range of P. pentosaceus guanine-pluscytosine contents, which are 4 to 5 mol% below the guanine-plus-cytosine contents of strains of P. acidilactici. Clearly, at some point, NCDO 1859 was misidentified by using only phenotypic data and should be rejected as the neotype strain of P. acidilactici. In addition, I propose that Pediococcus acidilactici should be conserved, with DSM 20284 as the neotype strain. This action is not in line with strict application of the International Code of Nomenclature of Bacteria but will ensure the continuity of nomenclature and avoid the confusion which would result from the alterations necessary if the code were followed in this instance., UL https://www.microbiologyresearch.org/content/journal/ijsem/10.1099/00207713-36-4-579