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.
Caption: Citrobacter freundii-Gram-negative, anaerobic prokaryote (bacterium). It is a Proteobacteria in the Enterobacteriaceae family. It can be found in soil, water, sewage, and food.Citrobacter species use citrate as a carbon source.Citrobacter freundii and Citrobacter diversus are often the cause of opportunistic infections. Citrobacter spp. cause neonatal meningitis but are unique in their frequent association with brain abscess formation.t can be found in soil, water, sewage, and food. Citrobacter species use citrate as a carbon source. Citrobacter freundii and Citrobacter diversus are often the cause of opportunistic infections.