Lactobacillus casei (Orla-Jensen) comb. nov.

Abstract

The name Lactobacillus casei, although applied for half a century to a well-described, well-known, clearly defined bacterium, has not been validly published, hence it has no standing in nomenclature. However, according to the rules of the International Code of Nomenclature of Bacteria (1 966), there are n o impediments to L. casei being proposed as a new combination. Therefore, recognizing the principle of stability in nomenclature, the authors propose Lactobacillus casei (Orla-Jensen) comb. nov. as the name of the organism described by von Freudenreich ( 1889-1890; 189 1) under the designation Bacillus a! and later named Streptobacterium casei by Orla-Jensen (1919). ATCC 393 (Streptobacterium casei No. 7 of Orla-Jensen) is designated as the neotype strain of Lactobacillus casei.

Deoxyribonucleic Acid Homology Among Lactobacillus Species of the Subgenus Streptobacterium Orla-Jensen

“…casei (Orla-Jensen) Hansen and Lessel (12 Their fermentation patterns were in accordance with the report of Abo-Elnaga and Kandler (1); in particular, these strains did not ferment rhamnose.…”

Reclassification of Lactobacillus casei subsp. casei ATCC 393 and Lactobacillus rhamnosus ATCC 15820 as Lactobacillus zeae nom. rev., Designation of ATCC 334 as the Neotype of L. casei subsp. casei, and Rejection of the Name Lactobacillus paracasei

“…Rule 19 also applies; i.e., a reference strain which has no standing in nomenclature may be made a neotype strain. On the basis of these rules, we propose that strain ATCC 334 should be designated the neotype strain of Lactobacillus casei (Orla-Jensen 1916) Hansen and Lessel 1971 and that the name Lactobacillus paracasei Collins, Phillips, and Zanoni 1989 should be rejected.…”

Comparative sequence analysis of a recA gene fragment brings new evidence for a change in the taxonomy of the Lactobacillus casei group.

“…Historically, the systematics of the L. casei group have been problematic and adjustments have been introduced based on new taxonomic methods that have gradually become available. Initially, Hansen & Lessel (1971) designated strain ATCC 393 T as the type strain of L. casei subsp. casei on the basis of a few phenotypic traits.…”