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.
Bacteriology and Pathology. Environmental mycobacteria do not cause the disease we call tuberculosis. Infection with these organisms is not transmissable, therefore they do not have public health implications and diseases caused by them, unlike those caused by M. tuberculosis are not notifiable.he first problem is what to call these bacteria collectively. The term Atypical Mycobacteria seems inappropriate as of all the Mycobacteria, M.tuberculosis with its Asian and African variants, and M. leprae, are the only ones which are obligative parasites. All the others can live free in the environment.