Stamen Grigorov (1878<unk>1945), onye Bọlgerian na-amụrụ ọgwụ na Geneva, bụ onye mbụ nyochara microflora nke yogọt Bulgarian. Na 1905, ọ kọwara ya dị ka nke nwere spherical na rod-like lactic acid na-emepụta nje bacteria. Na 1907, a na-akpọ nje bacteria dị ka Bacillus bulgaricus (ugbu a Lactobacillus delbrueckii subsp. bulgaricus). Onye Russia na-enweta ihe nrite Nobel na onye na-ahụ maka ihe ndị dị ndụ bụ Ilya Mechnikov, site na Institut Pasteur na Paris, na-emetụta ọrụ Grigorov na hypothesized na oriri nke yogọt na-adịgide adịgide bụ ihe kpatara ya. Stamen Grigorov, nwa akwụkwọ Bọlgerian nke na-amụ nkà mmụta ọgwụ na Geneva, buru ụzọ nyochaa microflora nke yogọt Bulgarian.
Bacillus bulgaricus