Lactobacillus delbrueckii Published January 2, 2012 at 233 × 160 in Can Yogurt Prevent Yeast Infections? Lactobacillus delbrueckii is an important species of bacteria used in yogurt. Photo: Jeff Broadbent, Utah State University Lactobacillus delbrueckii is an important species of bacteria used in yogurt. Photo: Jeff Broadbent, Utah State University