Mann and Spoering in 1974 discovered that the
fermented yogurt reduced blood serum cholesterol. In
1984 Hull identified the first probiotic species, the
Lactobacillus acidophilus. Later in 1991, Holcombh
identified Bifidobacterium bifidum. In 1994, the WHO
reckoned probiotics as the next most important in
immune defense system following antibiotic resistance.
These incidences paved the way for a new concept of
probiotics in medicine and dentistry3.