lactobacillus delbrueckii lactobacillus delbrueckii lactobacillus delbrueckii is a species of bacteria in the family lactobacillaceae. it is part of the microbiota of the lower reproductive tract of women. lactobacillus delbrueckii lactobacillus delbrueckii subspecies bulgaricus from a sample of activia brand yogurt scientific classification domain: bacteria phylum: bacillota class: bacilli order: lactobacillales family: lactobacillaceae genus: lactobacillus species: l. delbrueckii binomial name lactobacillus delbrueckiibeijerinck 1901 (approved lists 1980) subspecies subsp. bulgaricus (orla-jensen 1919) weiss et al. 1984 subsp. delbrueckii (leichmann 1896) weiss et al. 1984 subsp. indicus dellaglio et al. 2005 subsp. jakobsenii adimpong et al. 2013 subsp. lactis (orla-jensen 1919) weiss et al. 1984 subsp. sunkii kudo et al. 2012 synonyms "bacillus delbruecki" leichmann 1896 "bacillus leichmanni" henneberg 1903 lactobacillus bulgaricus (orla-jensen 1919) rogosa and hansen 1971 (approved lists 1980) lactobacillus lactis (orla-jensen 1919) bergey et al. 1934 (approved lists 1980) lactobacillus leichmannii (henneberg 1903) bergey et al. 1923 (approved lists 1980) "thermobacterium bulgaricum" orla-jensen 1919 "thermobacterium lactis" orla-jensen 1919 history naming the species carries the name of max delbrück, who lent his name to the berlin institute for the fermentation industries, where l. delbrueckii and l. delbrueckii subsp. bulgaricus were produced on an industrial scale from about 1896. (delbrück's institute was located in east berlin and around 1967 it was renamed institut für gärungsgewerbe und biotechnologie zu berlin (ifgb).) subspecies a paper published in 1983 by weiss, schillinger, and kandler, described the high degree of shared identity between l. delbrueckii 's subspecies, which had previously been considered separate species.