Cognitive development is Jean Piaget's theory. Through a series of stages, Piaget proposed four stages of cognitive development: the sensorimotor, preoperational, concrete operational and formal operational period.
The versatility of Bifidobacterium longum as a lactic acid microorganism is reflected in its capacity to resist under harsh conditions such as stomach acid, bile, pH fluctuations, and gastrointestinal passage.
Mycobacterium: A large family of bacteria that have unusually waxy cell walls that are resistant to digestion. The mycobacteria includes: 1  Mycobacterium avium -- which causes tuberculosis-like illness in birds and immunodeficient people;2  Mycobacterium leprae -- which causes leprosy;ycobacterium: A large family of bacteria that have unusually waxy cell walls that are resistant to digestion. The mycobacteria includes: 1  Mycobacterium avium -- which causes tuberculosis-like illness in birds and immunodeficient people;